Paragon GUARDIAN - Transducer Zero and Span Adjustment; -2.5 v Reference, Analog Output, and Display Scaling Calibration; Equipment for Reference;Output;Display Calibration; Reference, Output, and Display Calibration

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5.2 Calibration
5.2.1 Disconnect the pneumatic tubing from the left hand fitting labeled ROOM and
REFERENCE. This will produce a zero differential input pressure to the transducer.
Adjust the ZERO (R4) potentiometer for a reading of 0.000vdc, +
0.001vdc at TP7.
5.2.2 Obtain the full scale input range from the label located on the back of the access door.
With the pneumatic signal generator apply the required full scale pressure to the left
side ROOM pneumatic port. Adjust the SPAN (R10) potentiometer for a reading of
1.00vdc, +
0.001vdc at TP7.
5.2.3 Repeat steps 1 and 2 to verify that they meet specification tolerances. Large
adjustments to either zero or span may result in a slight shift in the other adjustment.
6.0 -2.5v REFERENCE, ANALOG OUTPUT AND DISPLAY SCALING CALIBRATION
Notes: 1. Removal of Guardian from the wall will be required to perform the following
calibration procedure.
2. All voltage measurements will be performed with DMM common (-) probe attached to
TP1.
3. Refer to Figure 1.0 for test set-up and Figure 2.0 & 3.0 for test point locations.
4. Analog output configuration (CURRENT or VOLTAGE) must be confirmed prior to
calibration. To determine the output configuration, refer to the label on the back side
of the access door and confirm by checking jumper H5/PROCESS.
5. For CURRENT output configuration, disconnect field wiring from J2/PROCESS-
OUT terminal. Place DMM in current mode, and install leads in series with field
wiring.
6.1 Equipment Needed
6.1.1 4-1/2 Digit Multi Meter (Fluke Model 8062A Or Equivalent DMM)
6.1.2 Precision Manometer (Ashcroft Model ATE-100 Or Equivalent)
6.1.3 Compressed Air source (Paragon Model AP-100 Air Pump)
6.1.4 Low Pressure Signal Generator (Paragon Model PS-100)
6.1.5 Potentiometer Adjustment Tool (Spectrol)
6.2 Calibration
6.2.1 Monitor TP6 and adjust R106(-2.5v ADJ) for a reading of -2.5 ∀.001v.
6.2.2 With zero input pressure to the transducer
6.2.2.1 CURRENT (Uni-Polar Range)- Adjust R89 (ZERO) for a reading of 4.0mA,
∀.01mA. CURRENT (Bi-Polar Range)- Adjust R89 (ZERO) for a reading
of 12.0mA, ∀.01mA.