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F-5500 Thermal Mass Flow Meter Manual 06/17 - 2030 / 107023 Page 60
Model F-5500
OPERATION
i
Performing the Zero CAL-CHECK
®
Calibration Validation Test
The Zero CAL-CHECK
®
test must be performed at zero flow to ensure a valid test
result. This test is used to confirm that the flow meter still retains its original NIST-
traceable calibration at zero flow and that the sensor is free of film or residue that may
affect readings. The test takes less than 5 minutes to complete. At the conclusion of
the test, a Pass or Fail message will be displayed. Press F4 at the conclusion of the
test to return to normal measuring mode or to terminate the test.
Press FLO (F2) from the main menu. The display will show:
F1 F2 F3 F4
Press DGN (F1). The display will show:
F1 F2 F3 F4
Press ZRO (F2). The display will show:
F1 F2 F3 F4
Press VER (F1) key to continue.
F1 F2 F3 F4
Press YES (F1) key to continue.
NOTE: For accurate readings and best test results, perform a visual
inspection of sensor window for damage/deformity and condition of
sensor elements before starting the test.
Performing
Zero CAL-
CHECK
®
Test
FLOW MENU 1
DGN UNT FM2 EXIT
DIAGNOSTIC
SIM ZRO EXIT
ZERO CHK MENU
VER EXIT
Operation: Zero CAL-CHECK
®
VERIFY ZRO?
YES NO
Performing
Zero CAL-
CHECK
®
Test
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