ROTRONIC PF4 - Manual (Page 44)

E-M-PF4-V1_00
Rotronic AG
Bassersdorf, Switzerland
Document Code Unit
PF4 Differential Pressure Transmitter:
Instruction Manual
Instruction Manual
Document Type
Page 44 of 54
Document Title
© 2014; Rotronic AG E-M-PF4-V1_00
7.3 Device Calibration and Adjustment Procedure
Both the differential pressure sensor and the corresponding electronics are very stable and require no
maintenance. They do not normally need to be changed or recalibrated after factory calibration. For maximum
accuracy, however, we recommend regular calibration of the device and adjustment when necessary.
Important:
When carrying out calibration or adjustment work on the open device, make sure you do not touch either the
sensor or the compressed air tubes.
7.3.1 Adjust Differential Pressure
The differential pressure can be adjusted at two points.
 Zero

Any reference point in the sensor measurement range
Zero Adjustment
1. Connect the pressure connections with a short tube
2. Select "<Zero Adjust>" in MENU > Differential Pressure
After successful zero adjustment, "OK" is shown in the display.
Reference Value Adjustment
1. Apply a defined differential pressure or determine the current differential pressure with a reference
instrument connected in parallel.
2. Enter the reference value determined in MENU > Differential Pressure > RefValue.
3. Select "<Adjust>" in MENU > Differential Pressure.
After successful adjustment, "OK" is shown in the display.
Reset Adjustment
The following procedure is used to reset adjustment to the factory setting.
1. Select "<Reset Adjustment>" in MENU > Differential Pressure
After successful resetting of the adjustment, "OK" is shown in the display.