Instruction Manual

Calibration
September 2013
5-11
Figure 5-5. Location of Relay Adjustment (Shroud Removed for Clarity)
ADJUSTMENT DISC
FOR DOUBLE-ACTING RELAYS:
ROTATE ADJUSTMENT DISC IN
THIS DIRECTION TO INCREASE
OUTPUT PRESSURE
FOR DOUBLE-ACTING RELAYS:
ROTATE ADJUSTMENT DISC IN
THIS DIRECTION TO DECREASE
OUTPUT PRESSURE
FOR SINGLE-ACTING DIRECT RELAYS:
ROTATE ADJUSTMENT DISC IN THIS
DIRECTION UNTIL IT CONTACTS THE
BEAM
LOW BLEED RELAY
DOES NOT HAVE
BLEED HOLES
W9305
Single-Acting Relays
WARNING
If the unused port is monitoring
pressure, ensure that the pressure
source conforms to ISA Standard
7.0.01, and does not exceed the
pressure supplied to the instrument.
Failure to do so could result in
personal injury or property damage
caused by loss of process control.
Single-Acting Direct Relay
The single-acting direct relay is designated by “Relay
C” on a label affixed to the relay itself. Relay C
requires no adjustment.
Single-Acting Reverse Relay
The single-acting reverse relay is designated by
“Relay B” on a label affixed to the relay itself. Relay B
is calibrated at the factory and requires no further
adjustment.
Restoring Factory Settings (1-3-4)
From the Online menu, select Configure, then select
Calibrate and Restore Factory Settings. Follow the
prompts on the Field Communicator display to restore
calibration to the factory settings. You should only
restore the calibration if it is not possible to calibrate
an individual sensor. Restoring calibration returns the
calibration of all of the sensors and the tuning set to
their factory settings. Following restoration of the
factory calibration, the individual sensors should be
recalibrated.
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