4-19
Chapter 4 Maintenance and Troubleshooting of this Device
Table 4-5.
HART7
Indicator
Display
Diagnostics
Display Message
Description Countermeasures
Maintenance
Required
AL.28
SWITCH
External Zero/Span
Adjustment Failure
External Zero/Span
Adjustment Failure
There is a problem with the
external zero adjustment
switch or the printed circuit
board.
Contact customer service.
AL.21
ZERO. CAL
Excess Zero
Calibration Value
Excess Zero Calibration
Value
Check that the input
pressure is appropriate for
the calibration value, and
calibrate again.
AL.22
SPAN. CAL
Excess Span
Calibration Value
Excess Span Calibration
Value
AL.26
NO.CALIB
Not Calibrated Not Calibrated
Restart the calibration value
at the time of shipping, or
calibrate the high and low
limits of the setting range.
AL.61
PRESS.FQ
Pressure Frequency
Index Alarm
Pressure Frequency Index
Alarm
Check operating conditions
AL.62
STD.DEV
Standard Deviation
Alarm
Standard Deviation Alarm
AL.63
OOR.CNT
Out-of-Range
Count Alarm
Out-of-Range Count Alarm
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