Compensation Startpoint (Rp920B And D); Calibration; Rp920A - Honeywell RP920A-D Service Data

4 8 9
2 3 1
O N L Y
8. Connections for RP920 Setpoint Check.

COMPENSATION STARTPOINT (RP920B and D)

1. Pipe the connections (Fig. 9).
2. Apply MLP­
3. Adjust the startpoint knob or screw until the gage
indicates 9 psi (62 kPa).
4. The setpoint knob setting should be 50
not, remove the setpoint knob and replace it oriented
to 50 percent.
Fig. 9. Connections for RP920B and D Compensation
Startpoint Check.

CALIBRATION

NOTE:
The following procedures can be used to calibrate
the RP920, or the MQP816A Controller
Calibration Kit can be used following procedures
in CCT816B Calibration Unit Installation
Instructions 95-7 153
85-0142
4 8 9 7
2 3
009
C, AND D
percent. If

RP920A

If none exists, install a temporary receiver gage
(matching
primary sensor gage port.
2. Apply MLP.
3. Install a 0- to 30-psi gage in the BLP test tap.
4. Adjust the setpoint knob until the BLP equals the
centerpoint of the controlled device spring range.
5. If the setpoint and primary sensor gage do not match,
remove the setpoint knob and replace it so the setpoint
matches the actual primary sensor gage reading.
6. Readjust the setpoint to the desired setpoint.
7. Calibration is complete.
RP920B
Supply the adjustable restricted air (equivalent to
Controller Calibration Kit MQP816A) to Port 3
(primary sensor).
NOTE: Sensors are not connected.
Pipe a receiver gage matching the compensation
sensor, or a 0- to 30-psi gage to Port 5 of the
RP920B.
NOTE: If the controller switch block module
gasket is in Position C, block Port 5 and
use the existing gage.
If a BLP gage does exist, install a 0- to 30-psi gage
in the branch line or in the BLP gage port if the
switch block gasket is in Position B.
4. Apply MLP.
5. Adjust the compensation startpoint knob until the
receiver gage indicates pressure equivalent of the
compensation startpoint (Fig. 10 and 11).
NOTE: Use APPENDIX A to find the equivalent
pressures for the temperature, humidity,
and percent of sensor span.
Fig. Negative (Winter) Compensation Calibration
Reset Schedule, Direct Acting Controller-3 to 13 psi
Throttling Range.
8
sensor) or a 0- to 30-psi gage in the
-THROTTLING
SENSOR
COMPENSATION
START POINT (WC)