Fox Thermal FT3 - Page 75

Fig. 4.4: Total Calibration Validation
CALIBRATION VALIDATION ON FOX MODEL FT3
CAL-V™ Zero CAL-CHECK™
Sensor and Electronics Test Sensor Test at Zero Flow vs.
Field Baseline
Sensor Test at Zero Flow vs.
Factory Baseline
IN SITU IN SITU OUT OF PIPE
• Complete test of sensor elements
and electronics
• In the pipe, under normal process
conditions
• Operator-initiated via front panel,
FT3 View™, or MODBUS
• Hold outputs at last value or go
to zero; operator-selectable
• Test takes less than 5 minutes
• Test results in pass/fail message
• Data saved in meter for look-up
anytime
• Calibration Validation Certicate
can be generated if test is
initiated using FT3 View™
software
• Customer-set zero ow baseline
established under normal zero
ow conditions
• Test compares sensor
characteristics at zero ow with
customer-set zero ow baseline
• Operator-initiated via front panel,
FT3 View™, or MODBUS
• Use of packing gland assembly to
retract probe is a convenient way
to establish a zero ow condition
• Test takes less than 5 minutes
after zero ow condition
established
• Calibration Validation Certicate
can be generated if test is
initiated using FT3™ View
software
• Test compares sensor
characteristics at zero ow at
ambient temperature and
atmospheric pressure with
factory characteristics
• Used when in situ zero ow
condition cannot be established
• Operator-initiated via front panel,
FT3 View™, or MODBUS
• Test takes less than 5 minutes
after out of pipe set-up complete
• Calibration Validation Certicate
can be generated if test is
initiated using FT3 View™
software
Fox Thermal has developed Calibration Validation, using the CAL-V™ and Zero CAL-CHECK
™
tests to
help our customers avoid sending the meter back for annual or biennial re-calibrations.
CAL-V - Calibration Validation Test 1
CAL-V™ ensures the repeatability, functionality of the sensor and its associated signal
processing circuitry, and cleanliness of the sensor.
During the CAL-V™ calibration validation test, the microprocessor adjusts current to the
sensor elements and determines the resulting electrical characteristics. Data within established
tolerances conrms the meter is accurate.
NOTE! If the CAL-V™ test is performed using the Fox Thermal FT3 View™ Software, at the
completion of the test, a CAL-V™ Certicate may be printed for a record of the test. This
certicate will display a pass/fail result.
Operation | 75
Model FT3
Operation