OPERATION MT100 Multipoint Flow Meter
time is reached the test starts. In the window’s Scheduled Test Status field, observe that the CEMS Progress bar shows the test in
progress as it grows in length (left to right) and that CEMS Test Status shows “In Progress” in red. Other information shown in the
Test Status field includes relay ON/OFF status. Observe also that the front panel SYS CHK button turns yellow and the Process
Status Summary shows “CEMS In Progress” in red upon start of test. Refer to the MT100 Configuration Software manual
06EN003461 for details.
Results: After several minutes the overall test results are displayed in the front panel display System Checks status box. If no issues
are detected for either flow element (FE) or calibration, the System Checks status box shows PASS (in green) status for INTF
(interference) and CAL (calibration) respectively (see Figure 34 above). If, however, an issue is detected in the FE and/or calibration
FAIL (in red) is shown for INTF and/or CAL respectively.
With default CEMS settings, 10 minutes is the absolute minimum start time difference between
and CEMS Scheduled. If CEMS default time(s) have changed make sure that the start time for CEMS Scheduled as
well as the overall duration of CEMS Scheduled do not overlap with idR Scheduled Tests. Refer to the MT100
Configuration Software manual 06EN003461 for details. (Changing CEMS settings, and configuring CEMS
Scheduled and idR Scheduled Tests can only be done using the configuration software application.)
System Checks Overview
The test sequence for on-demand and scheduled system checks are summarized below. The on-demand and scheduled tests are done for
FE1-FE4 and FE5-FE8 and results in 43 bytes of data for each FE group. View the data using the front panel HMI menu display
(Service/Diagnostics) or MT100 Configuration Software application. Download the data using the MT100 Configuration Software application.
Test parameters such as heater ON/OFF time, relay ON time, 4-20 mA output duration, and idR and dR Ω max. error
are defined in the CEMS Settings tab in the MT100 Configuration Software application. Refer to the MT100
Configuration Software manual 06EN003461 for details.
1. Get the time stamp for the test.
2. Energize Relay1.
3. Turn all heaters OFF (with default value of 2 minutes).
4. Set the 4-20 mA output to 4 mA (with default value of 2 minutes).
5. Check to see if the Heater-OFF timer has elapsed.
6. When the Heater OFF timer has elapsed, read (External) delta-Rs, set the Interference error flag if out of tolerance or the head is not
properly connected, switch the ADC input to Low Internal Delta-Rs, and start the 4-20 mA output timer (with default value of 2
minutes).
7. Check to see if the 4-20 mA output timer has elapsed.
8. When the 4-20 mA output timer has elapsed, read Low Internal Delta-Rs, set the Calibration error flag if out of tolerance, switch the
ADC input to Middle Internal Delta-Rs, set the 4-20 mA output to 12 mA, and restart the 4-20 mA output timer.
9. When the 4-20 mA output timer has elapsed, read Middle Internal Delta-Rs, set the Calibration error flag if out of tolerance, switch the
ADC input to High Internal Delta-Rs, set the 4-20 mA output to 20 mA, and restart the 4-20 mA output timer.
10. Check to see if the 4-20 mA output timer has elapsed.
11. When the 4-20 mA output timer has elapsed, read Internal High Delta-Rs, set the Calibration error flag if out of tolerance, switch the
ADC input to (External) Delta-Rs, set the 4-20 mA output to 4 mA, turn all heaters ON (with default value of 2 minutes).
12. If there is an error (or more), turn Relay2 ON (with default value of 2 minutes).
13. If there has been an error, check to see if the longer timer (the Relay2 ON timer or the Heater ON timer) has elapsed. If it has, turn
Relay1 and Relay2 OFF and end the test.
14. If there has not been an error, check to see if the Heater ON timer has elapsed. If it has, turn Relay1 OFF and end the test.
When the test completes, the 4-20 mA output follows the actual process data (flow) value.
Fluid Components International LLC 38
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