Showing posts with label Testing and Measurement. Show all posts
Showing posts with label Testing and Measurement. Show all posts
Monday, June 27, 2016
Tektronix DPO2000 - MSO2000 Oscilloscopes – Mixed signal oscilloscope – Factory adjustment procedure – How to calibrate the DC voltage and sine wave signal – Main board parts description – Exploded view – test and measurement equipment repair and service
Category: Test and Measurement Equipment Repair and Service
Contents of this article
- Factory adjustment procedure
- DC and sine wave signal calibration
- Mainboard parts and expoled view
Tektronix DPO2000 - MSO2000 Oscilloscopes
Factory Adjustment Procedure
To perform the factory adjustment procedure, complete these steps:
1. Connect the oscilloscope to an AC power source.
NOTE: You must connect the oscilloscope and the test equipment to the same AC power circuit. Connect the oscilloscope and test instruments to a common power strip if you are unsure of the AC power circuit distribution. Connecting the oscilloscope and test instruments to separate AC power circuits can result in offset voltages between the equipment, which can invalidate the adjustment procedure.
2. Power on the oscilloscope and warm it up for 20 minutes.
3. Power on the oscilloscope calibrator and warm it up for 20 minutes.
4. Connect the active heads from the calibrator to the oscilloscope, ensuring that Channel 1 on the calibrator connects to Channel 1 on the oscilloscope, and so on.
NOTE: For the DPO2000, there will be either 2 or 4 channels to connect. For the MSO2000, there will be either 2 or 4 channels to connect, plus an additional channel connection for the digital probe. Plug the digital probe into the Channel
5 active head on the calibrator, using the BNC to square pin adapter, but do not plug the probe into the oscilloscope until you are directed to by the calibration process. Once you do plug the digital probe into the oscilloscope, do not unplug it until the adjustment procedure is completed.
5. Access the Factory Adjustment menu:
a. Press the front-panel Utility button, and then press the bottom-bezel Utility Page button.
b. Use Multipurpose knob a to select Calibration, and then press the bottom-bezel Factory button. The Factory adjustment passed dialog will appear.
To perform the factory adjustment procedure, complete these steps:
1. Connect the oscilloscope to an AC power source.
NOTE: You must connect the oscilloscope and the test equipment to the same AC power circuit. Connect the oscilloscope and test instruments to a common power strip if you are unsure of the AC power circuit distribution. Connecting the oscilloscope and test instruments to separate AC power circuits can result in offset voltages between the equipment, which can invalidate the adjustment procedure.
2. Power on the oscilloscope and warm it up for 20 minutes.
3. Power on the oscilloscope calibrator and warm it up for 20 minutes.
4. Connect the active heads from the calibrator to the oscilloscope, ensuring that Channel 1 on the calibrator connects to Channel 1 on the oscilloscope, and so on.
NOTE: For the DPO2000, there will be either 2 or 4 channels to connect. For the MSO2000, there will be either 2 or 4 channels to connect, plus an additional channel connection for the digital probe. Plug the digital probe into the Channel
5 active head on the calibrator, using the BNC to square pin adapter, but do not plug the probe into the oscilloscope until you are directed to by the calibration process. Once you do plug the digital probe into the oscilloscope, do not unplug it until the adjustment procedure is completed.
5. Access the Factory Adjustment menu:
a. Press the front-panel Utility button, and then press the bottom-bezel Utility Page button.
b. Use Multipurpose knob a to select Calibration, and then press the bottom-bezel Factory button. The Factory adjustment passed dialog will appear.
c. While the dialog window is open, press and hold the top side-bezel button (below the Waveform Only button) for approximately five seconds. The Factory Adjustment description and menu will appear.
d. Push the OK Do Factory Adjustment side-bezel button to start the adjustment process. Prompts appear on the oscilloscope screen to indicate the signal type and the channels to which it should be connected.
NOTE: The oscilloscope adjusts itself automatically using the calibrator signal as a reference. You do not need to make any adjustments.
If you make an error, such as connecting the wrong input signal, you can repeat the last step by pushing the Return to Previous Screen side bezel button.
6. For each step, refer to the following table to identify the signal type.
d. Push the OK Do Factory Adjustment side-bezel button to start the adjustment process. Prompts appear on the oscilloscope screen to indicate the signal type and the channels to which it should be connected.
NOTE: The oscilloscope adjusts itself automatically using the calibrator signal as a reference. You do not need to make any adjustments.
If you make an error, such as connecting the wrong input signal, you can repeat the last step by pushing the Return to Previous Screen side bezel button.
6. For each step, refer to the following table to identify the signal type.
Signal type | Example prompt | Parameters to set |
DC Voltage | Apply 0 V DC 50 Ω termination signal to 3. | Waveform type, voltage, termination, channel |
Sine Signal | Apply 2.0 V Pk-Pk 1 MHz 50 Ω termination sine signal to 3. | Waveform type, voltage, frequency, termination, channel |
7. Continue with the adjustment process until it is complete and you receive the Pass notification. You can cancel the process at any time by pushing the MENU OFF button.
8. Complete the performance verification tests to verify that the adjustment procedure has correctly calibrated the oscilloscope.
Completing the Procedure
Instructions for completing the DC Voltage, Deskew, and Sine Signal tests are below. For each step in the calibration procedure, start at the beginning of the numbered instructions for the specific test type, and carefully complete each step. If the oscilloscope fails a step, consult the Troubleshooting section at the end of this chapter, revert to the previous step and try again. If the step fails again, return to the first step in the calibration procedure and try the entire procedure again. If the procedure fails, there could be problem with the oscilloscope.
Instructions for completing the DC Voltage, Deskew, and Sine Signal tests are below. For each step in the calibration procedure, start at the beginning of the numbered instructions for the specific test type, and carefully complete each step. If the oscilloscope fails a step, consult the Troubleshooting section at the end of this chapter, revert to the previous step and try again. If the step fails again, return to the first step in the calibration procedure and try the entire procedure again. If the procedure fails, there could be problem with the oscilloscope.
DC Voltage
The DC Voltage test is the first test to appear on the prompts, and it usually makes up the majority of the calibration procedure tests. For each DC Voltage test, complete all 8 steps listed below to best ensure that the test will pass.
1. Push the DC/Square button.
2. Push the WAVEFORM lower-bezel button, and then push the DC Positive right-bezel button.
3. Push the CHANNEL SELECT lower-bezel button.
4. Push the LOAD lower-bezel button to highlight either 1M Ω or 50 M Ω .
5. EXIT lower bezel button.
6. If the amplitude field is not selected, use the front panel scroll buttons. Type the specified voltage, and then push the appropriate unit in the right-bezel menu.
1. Push the DC/Square button.
2. Push the WAVEFORM lower-bezel button, and then push the DC Positive right-bezel button.
3. Push the CHANNEL SELECT lower-bezel button.
4. Push the LOAD lower-bezel button to highlight either 1M Ω or 50 M Ω .
5. EXIT lower bezel button.
6. If the amplitude field is not selected, use the front panel scroll buttons. Type the specified voltage, and then push the appropriate unit in the right-bezel menu.
For 0 V: ground the signal by pushing the grounding lower-bezel button. When this is active, you will not be able to make a channel selection, so in some cases you might need to temporarily deselect the grounding option while you make a channel selection. If the prompt requires all channels and the signal is grounded, The calibrator screen will default to Channel 1.
For any nonzero voltage: Before you select the voltage, you must first ensure that the calibrator is in direct mode. Push the lower-bezel button until 1.0 is selected.
7. Ensure that the red light is illuminated to indicate that the output is on. If not, push the ON button
For any nonzero voltage: Before you select the voltage, you must first ensure that the calibrator is in direct mode. Push the lower-bezel button until 1.0 is selected.
7. Ensure that the red light is illuminated to indicate that the output is on. If not, push the ON button
8. On the oscilloscope, push the OK Do Next Step side-bezel button.
Sine Signal
When a Sine Signal prompt appears, complete the following steps:
1. Push the Sine front panel button.
2. To ensure that the voltage is in direct mode, push the lower-bezel button and select 1.0.
3. Push the CHANNEL SELECT lower-bezel button, and then ensure that Channel 5 is selected.
4. Ensure that the red light is illuminated to indicate that the output is on. If not, push the ON button.
5. On the oscilloscope, push the OK Do Next Step right-bezel button.
1. Push the Sine front panel button.
2. To ensure that the voltage is in direct mode, push the lower-bezel button and select 1.0.
3. Push the CHANNEL SELECT lower-bezel button, and then ensure that Channel 5 is selected.
4. Ensure that the red light is illuminated to indicate that the output is on. If not, push the ON button.
5. On the oscilloscope, push the OK Do Next Step right-bezel button.
Main Board Parts
The Main board module contains the following functions:
Acquisition System
The Main board module contains the following functions:
Acquisition System
The Acquisition system begins by accepting the differential mode channel signals from the Front End assembly, which are routed to the A/D inputs, and ends with a digitized signal in memory.
Trigger System
Trigger System
The Trigger system processes the digitized signal stored in memory. Advanced trigger functions are enabled only when the appropriate application modules and supporting software are installed.
Display System
Display System
The Display system combines live waveform data from acquisition memory with menus and text, and stores this information in display memory. It then uses this data to refresh the WQVGA display module (LCD).
Processor System
Processor System
The Processor system contains a Power PC microprocessor that controls the entire instrument. The processor system also contains FLASH ROM, system RAM, and interfaces to Ethernet and to the USB ports.
Front-Panel Board
The Front Panel board contains a microprocessor that reads the front-panel buttons and controls, and then sends this information to the processor system on the Main board. The Front Panel board also generates the probe compensation output signal and provides an interface to the application modules.
Front-Panel Board
The Front Panel board contains a microprocessor that reads the front-panel buttons and controls, and then sends this information to the processor system on the Main board. The Front Panel board also generates the probe compensation output signal and provides an interface to the application modules.
Locator for internal modules
CLICK ON THE IMAGE TO ZOOM IN
Tuesday, June 21, 2016
FLUKE 123 - 124 Industrial ScopeMeter – Performance test – display test – calibration – Test equipment repair and service
Category: Test Equipment Repair and Service
Contents of this article
- Performance test
- Input A and B test
- Calibration procedure
FLUKE ScopeMeter 123 -124
Performance Verification
Equipment Required For Verification
The primary source instrument used in the verification procedures is the Fluke 5500A. If a 5500A is not available, you can substitute another calibrator as long as it meets the minimum test requirements.
# Fluke 5500A Multi Product Calibrator, including 5500A-SC Oscilloscope Calibration Option.
# Stackable Test Leads (4x), supplied with the 5500A.
# 50Ω Coax Cables (2x), Fluke PM9091 (1.5m) or PM9092 (0.5m).
# 50Ω feed through terminations (2x), Fluke PM9585.
# Fluke BB120 Shielded Banana to Female BNC adapters (2x), supplied with the Fluke 123.
# Dual Banana Plug to Female BNC Adapter (1x), Fluke PM9081/001.
# Dual Banana Jack to Male BNC Adapter (1x), Fluke PM9082/001.
# TV Signal Generator, Philips PM5418.
# 75Ω Coax cable (1x), Fluke PM9075.
# 75Ω Feed through termination (1x), ITT-Pomona model 4119-75.
# PM9093/001 Male BNC to Dual Female BNC Adapter
The primary source instrument used in the verification procedures is the Fluke 5500A. If a 5500A is not available, you can substitute another calibrator as long as it meets the minimum test requirements.
# Fluke 5500A Multi Product Calibrator, including 5500A-SC Oscilloscope Calibration Option.
# Stackable Test Leads (4x), supplied with the 5500A.
# 50Ω Coax Cables (2x), Fluke PM9091 (1.5m) or PM9092 (0.5m).
# 50Ω feed through terminations (2x), Fluke PM9585.
# Fluke BB120 Shielded Banana to Female BNC adapters (2x), supplied with the Fluke 123.
# Dual Banana Plug to Female BNC Adapter (1x), Fluke PM9081/001.
# Dual Banana Jack to Male BNC Adapter (1x), Fluke PM9082/001.
# TV Signal Generator, Philips PM5418.
# 75Ω Coax cable (1x), Fluke PM9075.
# 75Ω Feed through termination (1x), ITT-Pomona model 4119-75.
# PM9093/001 Male BNC to Dual Female BNC Adapter
How To Verify
Verification procedures for the display function and measure functions follow. For each procedure the test requirements are listed. If the result of the test does not meet the requirements, the test tool should be recalibrated or repaired if necessary. Some of the tests are slightly different for Fluke 123 and Fluke 124. This is caused by the higher vertical and trigger bandwidth in Fluke 124. Differences in requirements for
Fluke 123 and Fluke 124 are clearly indicated. Follow these general instructions for all tests:
# For all tests, power the test tool with the PM8907 power adapter. The battery pack
must be installed.
# Allow the 5500A to satisfy its specified warm-up period.
# For each test point , wait for the 5500A to settle.
# Allow the test tool a minimum of 20 minutes to warm up.
Verification procedures for the display function and measure functions follow. For each procedure the test requirements are listed. If the result of the test does not meet the requirements, the test tool should be recalibrated or repaired if necessary. Some of the tests are slightly different for Fluke 123 and Fluke 124. This is caused by the higher vertical and trigger bandwidth in Fluke 124. Differences in requirements for
Fluke 123 and Fluke 124 are clearly indicated. Follow these general instructions for all tests:
# For all tests, power the test tool with the PM8907 power adapter. The battery pack
must be installed.
# Allow the 5500A to satisfy its specified warm-up period.
# For each test point , wait for the 5500A to settle.
# Allow the test tool a minimum of 20 minutes to warm up.
Display and Backlight Test
Proceed as follows to test the display and the backlight:
1. Press POWER to turn the Test tool on.
2. Fluke 123: press BRIGHTNESS and verify that the backlight is dimmed. Then select maximum backlight brightness again.
Fluke 124: press BRIGHTNESS , then press . Verify that the test tool can be switched between dimmed backlight and maximum brightness with the keys. During the tests, use maximum brightness for the best visibility.
3. Remove the adapter power, and verify that the backlight is dimmed.
4. Apply the adapter power and verify that the backlight brightness is set to maximum.
5. Press and hold BRIGHTNESS BUTTON .
6. Press and release F4 .
7. Release BRIGHTNESS BUTTON.
The test tool shows the calibration menu in the bottom of the display.
Do not press F3 now! If you did, turn the test tool off and on, and start at 5.
8. Press F1 (PREV) three times.
The test tool shows Contrast (CL 0100):MANUAL
9. Press F3 (CAL) .
The test tool shows a dark display; the test pattern as shown in Figure may not be visible or hardly visible.
Observe the display closely, and verify that no light pixels are shown.
Proceed as follows to test the display and the backlight:
1. Press POWER to turn the Test tool on.
2. Fluke 123: press BRIGHTNESS and verify that the backlight is dimmed. Then select maximum backlight brightness again.
Fluke 124: press BRIGHTNESS , then press . Verify that the test tool can be switched between dimmed backlight and maximum brightness with the keys. During the tests, use maximum brightness for the best visibility.
3. Remove the adapter power, and verify that the backlight is dimmed.
4. Apply the adapter power and verify that the backlight brightness is set to maximum.
5. Press and hold BRIGHTNESS BUTTON .
6. Press and release F4 .
7. Release BRIGHTNESS BUTTON.
The test tool shows the calibration menu in the bottom of the display.
Do not press F3 now! If you did, turn the test tool off and on, and start at 5.
8. Press F1 (PREV) three times.
The test tool shows Contrast (CL 0100):MANUAL
9. Press F3 (CAL) .
The test tool shows a dark display; the test pattern as shown in Figure may not be visible or hardly visible.
Observe the display closely, and verify that no light pixels are shown.
11. Press F2 .
The test pattern is removed; the test tool shows Contrast (CL 0110):MANUAL
12. Press F3 (CAL) .
The test tool shows the display test pattern shown in Figure , at default contrast.
Observe the test pattern closely, and verify that the no pixels with abnormal contrast are present in the display pattern squares. Also verify that the contrast of the upper left and upper right square of the test pattern are equal.
13. Press F2 .
The test pattern is removed; the test tool shows Contrast (CL 0120):MANUAL
14. Press F3(CAL) .
The test tool shows a light display; the test pattern as shown in Figure may not be visible or hardly visible. Observe the display closely, and verify that no dark pixels are shown.
15. Turn the test tool OFF and ON to exit the calibration menu and to return to the normal operating mode.
The test pattern is removed; the test tool shows Contrast (CL 0110):MANUAL
12. Press F3 (CAL) .
The test tool shows the display test pattern shown in Figure , at default contrast.
Observe the test pattern closely, and verify that the no pixels with abnormal contrast are present in the display pattern squares. Also verify that the contrast of the upper left and upper right square of the test pattern are equal.
13. Press F2 .
The test pattern is removed; the test tool shows Contrast (CL 0120):MANUAL
14. Press F3(CAL) .
The test tool shows a light display; the test pattern as shown in Figure may not be visible or hardly visible. Observe the display closely, and verify that no dark pixels are shown.
15. Turn the test tool OFF and ON to exit the calibration menu and to return to the normal operating mode.
Input A and Input B Tests
Before performing the Input A and Input B tests, the test tool must be set in a defined
state, by performing a RESET.
Proceed as follows to reset the test tool:
# Press POWER to turn the test tool off.
# Press and hold BRIGHTNESS .
# Press POWER and release to turn the test tool on.
Wait until the test tool has beeped twice, and then release BRIGHTNESS . When the test tool has beeped twice, the RESET was successful.
For most tests, you must turn Input B on. Input A is always on.
Proceed as follows to turn Input B on:
# Press VHzA to open the Meter B menu.
Before performing the Input A and Input B tests, the test tool must be set in a defined
state, by performing a RESET.
Proceed as follows to reset the test tool:
# Press POWER to turn the test tool off.
# Press and hold BRIGHTNESS .
# Press POWER and release to turn the test tool on.
Wait until the test tool has beeped twice, and then release BRIGHTNESS . When the test tool has beeped twice, the RESET was successful.
For most tests, you must turn Input B on. Input A is always on.
Proceed as follows to turn Input B on:
# Press VHzA to open the Meter B menu.
# Using select INPUT B: ON .
# Press UP/DOWN to confirm the selection; the mark changes to SQUARE . The active setting from the next item group will be highlighted (for example SQUARE VAC ), and maintained after leaving the menu.
# Press F4 to exit the menu.
# Press UP/DOWN to confirm the selection; the mark changes to SQUARE . The active setting from the next item group will be highlighted (for example SQUARE VAC ), and maintained after leaving the menu.
# Press F4 to exit the menu.
During verification you must open menus, and to choose items from the menu.
# Open the menu, for example press SCOPE/MENU.
# PressUP/DOWN to highlight the item to be selected in a menu.
# Press F4 to confirm the selection and to jump to the next item group (if present). Item groups in a menu are separated by a vertical line.
# After pressing F4 in the last menu item group,
# Open the menu, for example press SCOPE/MENU.
# PressUP/DOWN to highlight the item to be selected in a menu.
# Press F4 to confirm the selection and to jump to the next item group (if present). Item groups in a menu are separated by a vertical line.
# After pressing F4 in the last menu item group,
If an item is selected, it is marked by SQUARE . Not selected items are marked by . If a selected item is highlighted, an then F4 is pressed, the item remains selected.
You can also navigate through the menu using RIGHT/LEFT. To conform the highlighted item you must press F4 .
You can also navigate through the menu using RIGHT/LEFT. To conform the highlighted item you must press F4 .
Input A and B Base Line Jump Test
Proceed as follows to check the Input A and Input B base line jump:
1. Short circuit the Input A and the Input B shielded banana sockets of the test tool.
Use the BB120 banana to BNC adapter, and a 50Ω (or lower) BNC termination.
2. Select the following test tool setup:
# Turn Input B on (if not already on).
# Press AUTO to select auto ranging (AUTO in top of display).
( AUTO toggles between AUTO and MANUAL ranging).
# Press SCOPE/ MENU to open the SCOPE INPUTS menu.
# Press F1 to open the SCOPE OPTIONS menu, and choose :
Proceed as follows to check the Input A and Input B base line jump:
1. Short circuit the Input A and the Input B shielded banana sockets of the test tool.
Use the BB120 banana to BNC adapter, and a 50Ω (or lower) BNC termination.
2. Select the following test tool setup:
# Turn Input B on (if not already on).
# Press AUTO to select auto ranging (AUTO in top of display).
( AUTO toggles between AUTO and MANUAL ranging).
# Press SCOPE/ MENU to open the SCOPE INPUTS menu.
# Press F1 to open the SCOPE OPTIONS menu, and choose :
SCOPE MODE: NORMAL /WAVEFORM MODE: SMOOTH
3. Using TIMEns toggle the time base between 10 ms/div and 5 ms/div.
(the time base ranging is set to manual now, the input sensitivity is still automatic; no indication AUTO or MANUAL is displayed).
After changing the time base wait some seconds until the trace has settled. Observe the Input A trace, and check to see if it returns to the same position after changing the time base. The allowed difference is ±0.04 division (= 1 pixel). Observe the Input B trace for the same conditions.
4. Using TIMEns toggle the time base between 1 µs/div and 500 ns/div. After changing the time base wait some seconds until the trace has settled. Observe the Input A trace, and check to see if it is set to the same position after changing the time base. The allowed difference is ±0.04 division (= 1 pixel).
Observe the Input B trace for the same conditions.
5. Using TIMEns set the time base to 10 ms/div.
6. Using mV /V toggle the sensitivity of Input A between 5 and 10 mV/div. After changing the sensitivity wait some seconds until the trace has settled. Observe the Input A trace, and check to see if it is set to the same position after changing the sensitivity. The allowed difference is ±0.04 division (= 1 pixel).
7. Using mV/V toggle the sensitivity of Input B between 5 and 10 mV/div. After changing the sensitivity wait some seconds until the trace has settled. Observe the Input B trace, and check to see if it is set to the same position after changing the sensitivity. The allowed difference is ±0.04 division (= 1 pixel).
8. When you are finished, remove the Input A and Input B short.
(the time base ranging is set to manual now, the input sensitivity is still automatic; no indication AUTO or MANUAL is displayed).
After changing the time base wait some seconds until the trace has settled. Observe the Input A trace, and check to see if it returns to the same position after changing the time base. The allowed difference is ±0.04 division (= 1 pixel). Observe the Input B trace for the same conditions.
4. Using TIMEns toggle the time base between 1 µs/div and 500 ns/div. After changing the time base wait some seconds until the trace has settled. Observe the Input A trace, and check to see if it is set to the same position after changing the time base. The allowed difference is ±0.04 division (= 1 pixel).
Observe the Input B trace for the same conditions.
5. Using TIMEns set the time base to 10 ms/div.
6. Using mV /V toggle the sensitivity of Input A between 5 and 10 mV/div. After changing the sensitivity wait some seconds until the trace has settled. Observe the Input A trace, and check to see if it is set to the same position after changing the sensitivity. The allowed difference is ±0.04 division (= 1 pixel).
7. Using mV/V toggle the sensitivity of Input B between 5 and 10 mV/div. After changing the sensitivity wait some seconds until the trace has settled. Observe the Input B trace, and check to see if it is set to the same position after changing the sensitivity. The allowed difference is ±0.04 division (= 1 pixel).
8. When you are finished, remove the Input A and Input B short.
Calibration Adjustment
Calibration number and date
When storing valid calibration data in FlashROM after performing the calibration adjustment procedure, the calibration date is set to the actual test tool date, and calibration number is raised by one. To display the calibration date and - number:
1. Press USER OPTION to open the USER OPTIONS menu.
2. Press F3 to show the VERSION&CALIBRATION screen (see Figure 5.1).
3. Press F4 to return to normal mode.
When storing valid calibration data in FlashROM after performing the calibration adjustment procedure, the calibration date is set to the actual test tool date, and calibration number is raised by one. To display the calibration date and - number:
1. Press USER OPTION to open the USER OPTIONS menu.
2. Press F3 to show the VERSION&CALIBRATION screen (see Figure 5.1).
3. Press F4 to return to normal mode.
Equipment Required For Calibration
The primary source instrument used in the calibration procedures is the Fluke 5500A. If a 5500A is not available, you can substitute another calibrator as long as it meets the minimum test requirements.
# Fluke 5500A Multi Product Calibrator, including 5500A-SC Oscilloscope Calibration Option.
# Stackable Test Leads (4x), supplied with the 5500A.
# 50Ω Coax Cables (2x), Fluke PM9091 or PM9092.
# 50Ω feed through terminations (2x), Fluke PM9585.
# Fluke BB120 Shielded Banana to Female BNC adapters (2x), supplied with the Fluke 123/124.
# Dual Banana Plug to Female BNC Adapter (1x), Fluke PM9081/001.
# Male BNC to Dual Female BNC Adapter (1x), Fluke PM9093/001.
The primary source instrument used in the calibration procedures is the Fluke 5500A. If a 5500A is not available, you can substitute another calibrator as long as it meets the minimum test requirements.
# Fluke 5500A Multi Product Calibrator, including 5500A-SC Oscilloscope Calibration Option.
# Stackable Test Leads (4x), supplied with the 5500A.
# 50Ω Coax Cables (2x), Fluke PM9091 or PM9092.
# 50Ω feed through terminations (2x), Fluke PM9585.
# Fluke BB120 Shielded Banana to Female BNC adapters (2x), supplied with the Fluke 123/124.
# Dual Banana Plug to Female BNC Adapter (1x), Fluke PM9081/001.
# Male BNC to Dual Female BNC Adapter (1x), Fluke PM9093/001.
Starting Calibration Adjustment
Follow the steps below to start calibration adjustments.
1. Power the test tool via the power adapter input, using the PM8907 power adapter.
2. Check the actual test tool date, and adjust the date if necessary:
# Press USER OPTION to open the USER OPTIONS menu
# Using UP/DOWN select DATE ADJUST
# press F4 to open the DATE ADJUST menu
# adjust the date if necessary.
3. Select the Maintenance mode.
The Calibration Adjustment Procedure uses built-in calibration setups, that can be accessed in the Maintenance mode.
To enter the Maintenance mode proceed as follows:
# Press and hold BRIGHTNESS
# Press and release F4
# Release BRIGHTNESS
# The display shows the Calibration Adjustment Screen.
The display shows the first calibration step Warming Up (CL 0200) , and the calibration status :IDLE (valid) or :IDLE (invalid)
Follow the steps below to start calibration adjustments.
1. Power the test tool via the power adapter input, using the PM8907 power adapter.
2. Check the actual test tool date, and adjust the date if necessary:
# Press USER OPTION to open the USER OPTIONS menu
# Using UP/DOWN select DATE ADJUST
# press F4 to open the DATE ADJUST menu
# adjust the date if necessary.
3. Select the Maintenance mode.
The Calibration Adjustment Procedure uses built-in calibration setups, that can be accessed in the Maintenance mode.
To enter the Maintenance mode proceed as follows:
# Press and hold BRIGHTNESS
# Press and release F4
# Release BRIGHTNESS
# The display shows the Calibration Adjustment Screen.
The display shows the first calibration step Warming Up (CL 0200) , and the calibration status :IDLE (valid) or :IDLE (invalid)
4. Continue with either a. or b. below:
a. To calibrate the display contrast adjustment range and the default contrast, Contrast Calibration Adjustment.
This calibration step is only required if the display cannot made dark or light enough, or if the display after a test tool reset is too light or too dark.
b. To calibrate the test tool without calibrating the contrast.
a. To calibrate the display contrast adjustment range and the default contrast, Contrast Calibration Adjustment.
This calibration step is only required if the display cannot made dark or light enough, or if the display after a test tool reset is too light or too dark.
b. To calibrate the test tool without calibrating the contrast.
FLUKE Thermometer 51 - 52 - 53 - 54 Series II - performance test - Hyper terminal – Calibration – Testing equipment repair and service
Category: Testing Equipment Repair and Service
Contents of this article
- Performance Test
- Calibration procedure
- Hyper terminal
FLUKE 51-52-53-54 Series II
Performance Tests
Performance tests are recommended for incoming inspection, periodic maintenance, and for checking the thermometer’s specifications. If the thermometer fails any part of the performance tests, calibration and/or repair is indicated.
Before performing these tests:
1. Allow the thermometer to stabilize to room temperature, +23 oC ± 5 oC (+73 oF ± 9 oF).
2. Check the batteries and replace them if necessary.
Display Test
Turn the thermometer on while pressing the h button. All display segments are displayed until the h button is released. Confirm that all the display segments
Performance tests are recommended for incoming inspection, periodic maintenance, and for checking the thermometer’s specifications. If the thermometer fails any part of the performance tests, calibration and/or repair is indicated.
Before performing these tests:
1. Allow the thermometer to stabilize to room temperature, +23 oC ± 5 oC (+73 oF ± 9 oF).
2. Check the batteries and replace them if necessary.
Display Test
Turn the thermometer on while pressing the h button. All display segments are displayed until the h button is released. Confirm that all the display segments
Keypad Test
Check that all keypad switches are functional by pressing each key and confirming the proper response on the display.
Wide Range Performance Test Procedure
This test verifies the instrument specifications. If the instrument fails this test, perform the calibration procedure. If the unit continues to fail, it should be taken to a Fluke service center.
Ice Bath Construction
To begin the performance test, first construct an ice bath as follows:
1. Prepare a Dewar Flask by drilling two holes in its cap to accept the Mercury thermometer and thermocouple wires, or use a standard laboratory cork.
2. Fill the Dewar Flask with shaved or crushed ice made from distilled water.
3. Fill the Dewar Flask with enough distilled water so that the ice turns to slush, but do not add enough water to float the ice.
Note
As the ice melts, siphon off the excess water and add more ice. Allow approximately 5 to 10 minutes for the water to drop back to the freezing point.
Check that all keypad switches are functional by pressing each key and confirming the proper response on the display.
Wide Range Performance Test Procedure
This test verifies the instrument specifications. If the instrument fails this test, perform the calibration procedure. If the unit continues to fail, it should be taken to a Fluke service center.
Ice Bath Construction
To begin the performance test, first construct an ice bath as follows:
1. Prepare a Dewar Flask by drilling two holes in its cap to accept the Mercury thermometer and thermocouple wires, or use a standard laboratory cork.
2. Fill the Dewar Flask with shaved or crushed ice made from distilled water.
3. Fill the Dewar Flask with enough distilled water so that the ice turns to slush, but do not add enough water to float the ice.
Note
As the ice melts, siphon off the excess water and add more ice. Allow approximately 5 to 10 minutes for the water to drop back to the freezing point.
4. Replace the Dewar Flask cap or cork, and insert the thermocouple wires and Mercury thermometer as shown in Figure 2. Insert the Mercury thermometer to the same depth as the thermocouple wire
Ice Bath Test
Use the following procedure to test the thermometer. If the thermometer has two inputs, this test should be conducted on both thermocouple inputs.
1. If not already selected, select K-type thermocouple on the thermometer using the
SETUP, UP, DOWN, and ENTER buttons.
2. Connect the equipment as shown in Figure above . Allow the setup to thermally stabilize at least 5 minutes after inserting the thermocouple into the thermometer.
3. Verify that the ice bath temperature reads 0.0 oC ± 0.06 oC on the Mercury thermometer.
4. Short (or apply 0 mV) to the copper wires at the Calibrator.
5. Verify the thermometer reads 0.0 oC ± 0.3 oC.
6. If this test fails, reposition the thermocouple wires and Mercury thermometer to the same depth in the ice bath, and repeat steps 3-5. If the test continues to fail, perform the calibration procedure, located after this procedure.
7. Remove the short applied in step 4.
8. Using Table 3, steps 2-5, obtain an output from the Calibrator equal to the values in the “Input Voltage (mV DC)” column, and verify the thermometer reads within the limits specified. If any step fails, perform the calibration procedure located later in this section.
9. Disconnect the thermocouple from the input terminals. This completes the ice bath test.
Use the following procedure to test the thermometer. If the thermometer has two inputs, this test should be conducted on both thermocouple inputs.
1. If not already selected, select K-type thermocouple on the thermometer using the
SETUP, UP, DOWN, and ENTER buttons.
2. Connect the equipment as shown in Figure above . Allow the setup to thermally stabilize at least 5 minutes after inserting the thermocouple into the thermometer.
3. Verify that the ice bath temperature reads 0.0 oC ± 0.06 oC on the Mercury thermometer.
4. Short (or apply 0 mV) to the copper wires at the Calibrator.
5. Verify the thermometer reads 0.0 oC ± 0.3 oC.
6. If this test fails, reposition the thermocouple wires and Mercury thermometer to the same depth in the ice bath, and repeat steps 3-5. If the test continues to fail, perform the calibration procedure, located after this procedure.
7. Remove the short applied in step 4.
8. Using Table 3, steps 2-5, obtain an output from the Calibrator equal to the values in the “Input Voltage (mV DC)” column, and verify the thermometer reads within the limits specified. If any step fails, perform the calibration procedure located later in this section.
9. Disconnect the thermocouple from the input terminals. This completes the ice bath test.
Verification of IR Communications Port (Fluke 53 and 54)
This section explains how to verify the operation of the IR Communications Port (IR port). Perform the following procedure using a PC and HyperTerminal. The IR port can also be verified using Flukeview software. To set up a HyperTerminal file, follow these steps:
1. Connect the IR adapter cable to the DB9 Adapter connector. Connect the other end of the DB9 Adapter to a COM port of the PC.
2. Place the Fluke 53 or 54 in front of the IR adapter.
3. Open up a HyperTerminal session. Select Start button, Programs, Accessories,
HyperTerminal.
4. Open up a New Connection with a name like “Fluke 54 IR Test”.
5. When the Connect To box appears, select the COM1 or COM2 (the port that the IR adapter cable is plugged into).
6. Select Port Settings: 9600 baud rate, 8 data bits, no parity, 1 stop bit, and no flow control.
7. Under File, select properties. Verify that the correct port is selected. Click on Configure. Verify that port settings are correct (the baud rate may need to be changed to 9600).
8. Select the Settings tab then click on ASCII Setup. Check the following boxes:
# Echo typed characters locally
# Append line feeds to incoming line ends
# Wrap lines that exceed terminal width
To open a HyperTerminal file to test the IR port, use the following procedure:
1. Under File, select Save As. Use a file name such as “Fluke 54 IR Test” and then click on save.
2. Click on the phone disconnect icon.
3. Click on open folder or under File select Open. Double click on Fluke 54 IR Test.
4. Type in "ID" followed by the Enter key (notice the "ID" is capitalized).
5. The display of the thermometer now shows the thermometer name (Fluke 53-II or Fluke 54-II), and the units operating software version (e.g. Fluke 54-II, V1.01).
This section explains how to verify the operation of the IR Communications Port (IR port). Perform the following procedure using a PC and HyperTerminal. The IR port can also be verified using Flukeview software. To set up a HyperTerminal file, follow these steps:
1. Connect the IR adapter cable to the DB9 Adapter connector. Connect the other end of the DB9 Adapter to a COM port of the PC.
2. Place the Fluke 53 or 54 in front of the IR adapter.
3. Open up a HyperTerminal session. Select Start button, Programs, Accessories,
HyperTerminal.
4. Open up a New Connection with a name like “Fluke 54 IR Test”.
5. When the Connect To box appears, select the COM1 or COM2 (the port that the IR adapter cable is plugged into).
6. Select Port Settings: 9600 baud rate, 8 data bits, no parity, 1 stop bit, and no flow control.
7. Under File, select properties. Verify that the correct port is selected. Click on Configure. Verify that port settings are correct (the baud rate may need to be changed to 9600).
8. Select the Settings tab then click on ASCII Setup. Check the following boxes:
# Echo typed characters locally
# Append line feeds to incoming line ends
# Wrap lines that exceed terminal width
To open a HyperTerminal file to test the IR port, use the following procedure:
1. Under File, select Save As. Use a file name such as “Fluke 54 IR Test” and then click on save.
2. Click on the phone disconnect icon.
3. Click on open folder or under File select Open. Double click on Fluke 54 IR Test.
4. Type in "ID" followed by the Enter key (notice the "ID" is capitalized).
5. The display of the thermometer now shows the thermometer name (Fluke 53-II or Fluke 54-II), and the units operating software version (e.g. Fluke 54-II, V1.01).
Calibration and Offset Adjustment
Calibration consists of two parts:
1. Calibration of the A/D converter, using the set up shown in Figure 3.
2. Reference junction calibration, using the ice bath test set up shown in Figure 2.
A/D Calibration
To calibrate the A/D portion of the thermometer, follow these steps:
1. Connect the calibrator to the T1 input of the thermometer using copper (nonthermocouple) wire and a copper thermocouple connector. Refer to Figure for proper equipment connections.
2. Turn the thermometer on, with a small, blunt probe, press the calibration button located on the back and in the center of the thermometer.
Calibration consists of two parts:
1. Calibration of the A/D converter, using the set up shown in Figure 3.
2. Reference junction calibration, using the ice bath test set up shown in Figure 2.
A/D Calibration
To calibrate the A/D portion of the thermometer, follow these steps:
1. Connect the calibrator to the T1 input of the thermometer using copper (nonthermocouple) wire and a copper thermocouple connector. Refer to Figure for proper equipment connections.
2. Turn the thermometer on, with a small, blunt probe, press the calibration button located on the back and in the center of the thermometer.
3. The menu on the display changes to “CAL A-d”.
Note
Within CAL are four menu options that may be accessed by pressing E:
# CAL A-d prompts the operator for the A/D calibration inputs in mV dc.
# CAL rEF allows the operator to calibrate the reference junction at a known temperature.
# CAL donE saves the new calibration constants in memory.
# CAL Abrt ignores calibration changes (turning the thermometer off while in CAL will also ignore calibration changes).
4. Press UP or DOWN to select different menu options.
5. With CAL A-d selected, press ENTER. The thermometer prompts “80”. Set the calibrator to +80.000 mV and allow the output to stabilize.
Note
For steps 6 and 8, keep hand and body motion to a minimum while the thermometer takes A/D readings.
6. Press E. Wait while it takes A/D readings.
7. When the thermometer prompts for “-8”, set the Calibrator to -8.0000 mV. Allow the output to stabilize.
8. Press ENTER on the thermometer and wait while it takes A/D readings. The thermometer now shows the measured value in the bottom portion of the display. Millivolts appears on the left side and microvolts appears on the right side.
9. If the measurement is from –7 995.0 to –8 005.0, press ENTER and the meter will return to the calibration menu and display CAL rEF. If the measurement is outside – 7995.0 to –8005.0, press ENTER once to return to the calibration menu. Using UP or DOWN, select CAL A-d and try the A/D calibration procedure a second time starting at step 5.
10. Using UP or DOWN, select “CAL donE”, then press E to store the calibration in memory.
Note
Within CAL are four menu options that may be accessed by pressing E:
# CAL A-d prompts the operator for the A/D calibration inputs in mV dc.
# CAL rEF allows the operator to calibrate the reference junction at a known temperature.
# CAL donE saves the new calibration constants in memory.
# CAL Abrt ignores calibration changes (turning the thermometer off while in CAL will also ignore calibration changes).
4. Press UP or DOWN to select different menu options.
5. With CAL A-d selected, press ENTER. The thermometer prompts “80”. Set the calibrator to +80.000 mV and allow the output to stabilize.
Note
For steps 6 and 8, keep hand and body motion to a minimum while the thermometer takes A/D readings.
6. Press E. Wait while it takes A/D readings.
7. When the thermometer prompts for “-8”, set the Calibrator to -8.0000 mV. Allow the output to stabilize.
8. Press ENTER on the thermometer and wait while it takes A/D readings. The thermometer now shows the measured value in the bottom portion of the display. Millivolts appears on the left side and microvolts appears on the right side.
9. If the measurement is from –7 995.0 to –8 005.0, press ENTER and the meter will return to the calibration menu and display CAL rEF. If the measurement is outside – 7995.0 to –8005.0, press ENTER once to return to the calibration menu. Using UP or DOWN, select CAL A-d and try the A/D calibration procedure a second time starting at step 5.
10. Using UP or DOWN, select “CAL donE”, then press E to store the calibration in memory.
11. To ignore the calibration changes, use UP or DOWN, and select “CAL Abrt” and press ENTER.
12. Proceed to Reference Junction Calibration.
12. Proceed to Reference Junction Calibration.
Using the Offset to Adjust for Variation Between Thermocouples
Use the offset option in the thermometer SETUP mode to adjust the thermometer's readings for errors of a specific thermocouple. Use the following procedure:
1. Plug the thermocouple into the thermometer input then allow the setup to thermally stabilize at least 5 minutes.
2. Place the thermocouple in a known, stable temperature environment (such as an ice bath, lag bath, or a dry well calibrator).
3. Allow the readings to stabilize.
4. In SETUP, change the offset until the primary display reading matches the bath temperature
Use the offset option in the thermometer SETUP mode to adjust the thermometer's readings for errors of a specific thermocouple. Use the following procedure:
1. Plug the thermocouple into the thermometer input then allow the setup to thermally stabilize at least 5 minutes.
2. Place the thermocouple in a known, stable temperature environment (such as an ice bath, lag bath, or a dry well calibrator).
3. Allow the readings to stabilize.
4. In SETUP, change the offset until the primary display reading matches the bath temperature
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