QIRF Operation And Maintenance Manual
QIRF Operation Manual May. 01, 2012
85050-301-000 Rev C
29
5. Maintenance
5.1 DVM Connection for 4-20mA measurement
• QIRF is Offline of the 4-20mA loop:
o Switch DVM to measure DC current, plug the probe “-“ into GND and
plug the probe “+” into SIG- on the Display Board.
• QIRF is Online of the 4-20mA loop:
o Switch DVM to measure DC current, plug the probe “-“ into SIG - and
plug the probe “+” into SIG + on the Display Board.
5.2 4mA and 20mA Output Calibration
These values are established during factory 4-20mA output calibrations and should not
require recalibration in the field. Do not attempt to modify these settings in the field.
Changing these values will change the analog output signal scale.
• Entry [Menu]-->[System Setting]
• Choose [4mA CAL]:
1. Press Key [YES] to output 4mA signal
2. Connect DVM to the unit as described above
3. Press Key [Up] and Key [Down] to adjust the current to 4.00mA to 4.05mA
4. Press Key [YES] again, then the settings will be accepted and saved
• Choose [20mA CAL]:
1. Press Key [YES] to output 20mA signal
2. Connect DVM to the unit as described above
3. Press Key [Up] and Key [Down] to adjust the current to 20.00 to 20.05mA
4. Press Key [YES] again, then the settings will be accepted and saved
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