Fox Thermal FT3 - Page 77

WARNING! If you are using closed loop control, the system needs to be taken o-line during
the test.
Press OK (F4) to start CAL-V™. The screen will show:
F1 F2 F3 F4 F1 F2 F3 F4
This test will take up to 4 minutes (less time if there is ow) and will show the Cal value changing as
the power to the sensor is adjusted. The T=xxx is a count down timer indicating how much time is left
to nish the test. A “Please Wait” message will be ashing on and o on line 2 during this test.
CAL-V™ Test Results
Upon test completion, the nal CAL-V™ value will be displayed along with a Pass or Fail message:
• Pass: less than ±2.5
• Fail: equal to or greater than ±2.5
Recommended next steps if a "Fail" result is displayed:
• Run the test again under a higher ow rate if possible.
• Remove the probe from the pipe, clean the sensor, and perform the test again under a normal
or high ow rate.
If a "Fail" result is displayed after repeating the test, please call Fox Thermal Service at (831) 384-4300
for assistance.
F1 F2 F3 F4
Press OK (F4) to exit the menu when the test is complete.
CAUTION!
• The CAL-V™ test is valid for checking the calibration accuracy of ow meters installed in the
applications for which it was calibrated including the gas/gas mixture, calibration range, and
pipe size shown on the calibration certicate.
• For applications with temperature exceeding 250°F (121°C), CAL-V™ test results may vary.
• Periodic inspection for damage and cleaning of the sensor elements is required.
Zero CAL-CHECK™ - Calibration Validation Test 2
The Zero CAL-CHECK™ test is a companion test to CAL-V™. Unlike CAL-V™, which may be performed
in the pipe and at process conditions, Zero CAL-CHECK™ must be performed at zero ow to ensure a
valid test result. This test is used to conrm that the ow meter still retains its original NIST-traceable
calibration at zero ow and that the sensor is free of lm or residue that may aect readings. The test
Verifying CAL-V
Please Wait
Verifying CAL-V
Cal = 12.7 T=123
CAL-V = 0.251
Pass OK
Operation | 77
Model FT3
Operation