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PRIMARY
SENSOR
THROTTLING
RANGE
COMPENSATION
SENSOR
COMPENSATION
START POINT (WC)
Fig. 11. Positive (Summer) Compensation Calibration
Reset Schedule, Direct Acting Controller-3 to 13 psi
(21 to 90 kPa) Throttling Range.
6.
Adjust the restrictor for the equivalent pressure of
the primary sensor at the compensation startpoint
on the reset schedule.
Adjust the setpoint knob until the BLP equals the
7.
desired BLP at the compensation start conditions
(e.g., 13 psi [90 kPa] for negative compensation, 3
psi for positive compensation).
If needed, remove the setpoint knob and reposition
8.
it so the setpoint matches the primary sensor value
at the compensation start. The setpoint knob is
calibrated.
Supply the adjustable restricted air (equivalent to
Controller Calibration Kit MQP816A) to Port 5
(compensation sensor).
Adjust the restrictors for the equivalent pressure of
10.
the sensors at full compensation on the schedule.
11. Adjust the authority knob until the BLP equals the
desired pressure of the controlled device with full
compensation conditions.
NOTE: This point can be slightly different from
the calculated authority set on the control
ler. Leave the new setting on the controlIer
and mark the job drawings with the new
value.
12. Calibration is complete.
RP920C AND D
1. Remove and save the screw from the RP92OC or D
integral module (Fig. 12) and install Barb Fitting
14003755-001 in its place.
2. Apply 8 psi (55 kPa) to the integral module.
3. Calibrate the RP92OC following the procedures for
the RP920A. Calibrate the RP920D following the
procedures for the RP920B.
4. When calibration is complete, remove the barb fitting
and replace screw. Be certain that the O-ring is tight.
REMOVE
SEAL
SCREW AND
I N S T A L L B A R B
F I T T I N G .
Fig.
ADJUSTMENTS
GENERAL
1. Some adjustments on the RP920 Modular Pneumatic
Controllers require removal of modules. Module and
port locations are shown in Figures 13 and 14.
2. If a connection to Port 4, 6, or 7 is required, remove the
self-tapping screw from Port 8 and use the screw to tap
the port.
3. Install Barb Fitting 14003755-001 and O-ring finger
tight in the appropriate port.
4. If Port 8 is not used, reinstall the screw.
9
85-0142
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