Instruction Manual
D200160X012
4195K Controllers
July 2018
18
7. The controller output pressure should be 0 bar (0 psig).
8. Rotate the proportional band to 5 percent REVERSE.
9. The controller output should be within 0.14 bar (2 psig) of the supply pressure.
10. If the controller output is within tolerance, adjust the proportional band to 400 percent in the desired action, secure
the proportional band indicator cover (key 36) with the machine screws (key 6), and go to the startup procedure. If
the controller output pressure is not within tolerance, go to the 4195KA calibration procedure for recalibration.
Startup for 4195KA Controllers
Perform the prestartup checks and, if necessary, calibrate the controller prior to this procedure.
Note
When performing the startup procedures, keep in mind that the initial settings are guidelines. They will vary depending on the
actual process being controlled.
1. Be sure the supply pressure regulator is delivering the proper supply pressure to the controller.
2. For controllers with:
Manual set point:
Move the set point adjustment to the desired set point.
Remote set point:
remote set point connection.
b. Adjust the pressure source until the set point indicator reaches the desired set point. Remember: Increasing the
remote set point pressure increases the set point.
3. Set the proportional band adjustment to 100 percent for fast processes. For slow processes, calculate the
proportional band percentage from the equation below:
P.B.
+
200
Allowable Overshoot
Pressure Span
For example:
200
0.14 bar
2.1 bar
^
13%
4. Create a load upset by momentarily changing the set point. Check for system cycling. If the system does not cycle,
lower the proportional band setting (thus raising the gain) and disturb the system again by changing the set point.
Continue this procedure until the system cycles. At this point, double the proportional band setting (proportional
band setting x2).
5. Check the stability of the recommended proportional band setting by introducing a disturbance and monitoring
the process.
Calibration of 4195KA Controllers
WARNING
To avoid personal injury or property damage resulting from the sudden release of pressure, do not exceed the operating
limits given in this manual.