17
Operation: CAL-V
™
CAL-V
™
Calibration Validation
OPERA
TION
To select what the flow output will do during CAL-V™, choose from these options:
Go To Zero: Flow output will be zero during the test (ie 4mA)
Hold Value: Flow will hold last value during the test
F1 F2 F3 F4
Select the option using
NXT (F1)
and then press
OK (F4)
.
F1 F2 F3 F4
WARNING: If you are using closed loop control, the system needs to be taken off-line
during the test.
Press
OK (F4)
to start CAL-V™. CAL-V™ test screen:
F1 F2 F3 F4
This test will take up to 4 minutes (less time if there is flow) and will show the Cal
value changing as the power to the sensor is adjusted. The T=xxx is a count down
Caution:
•
The CAL-V™ test is valid for checking the calibration accuracy of
flow meters installed in the applications for which it was calibrated
including the gas/gas mixture, calibration range and pipe size shown
on the calibration certificate.
•
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.
Take Control
off-line EXIT OK
Verifying CAL-V
Cal = 12.7 T=123
Flo:Go to zero
NXT EXIT OK