6.
Use this step only for onscale and stable but Inaccurate sensor readings.
Refer to your System Drawings to determine the sensor part number, then to that sensor's
Specification Drawing, Data Base section, for sensor's data base values (Offset, Span, Sensor
Type, Range and Calibration). Enter the complete edit mode with your proper access
combination, select the edit page for the corresponding sensor and Insure that the Offset, Span,
Sensor Type, Range and Calibration values are correct.
Determine from the Sensor Spec. Dwg. If the sensor requires field calibration. Where field
calibration is required, perform this by referring to Section IV for proper calibration procedure. If
this falls to correct the problem or If sensor has fixed data base, not requiring field calibration,
replace sensor.
Note:
Sensors that require field calibration as noted in the Sensor Spec. Dwg. Calibration
section, will have Offset and Span values only approximately equal to those given in the
data base section. They may also have a different value for Sensor Type, Range and
Calibration. Refer to Calibration Procedure, Section IV.
If these readings do not appear to be proper, change them, following normal edit
procedures, to agree with the Sensor Spec. Dwg. data base values.
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NOTE: EXERCISE CARE WHEN USING THE COMPLETE EDIT MODE AS IMPROPER
ENTRIES
CAN
CAUSE
THE
SENSOR
READING
TO
BECOME
ERRATIC,
INACCURATE OR INOPERATIVE.
---------------------------------------------------------------------------------------------------------------------------------
---------------------------------------------------------------------------------------------------------------------------------
7.
Replace Input Board.
8.
Replace Analog Module Header. (Note header channel number printed on PCB card).
9.
Replace Analog Module. (Transfer headers to same channel and sensor terminations to same screw
terminals).
Section 9 - Page 7
