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Instruction Manual
D200160X012
4195K Controllers
July 2018
28
To switch from manual to automatic mode, adjust the set point to move the ball into the switching zone. Turn the
switch to AUTO and adjust the set point to control the output.
When the automatic/manual switch is in AUTO, adjusting the loader knob has no effect on the controller output.
When the automatic/manual switch is in MANUAL, changing the set point has no effect on the controller output.
Prestartup Checks for 4195KB and KC Controllers
Refer to figure 4‐1 for adjustment locations, and refer to figure 7‐1 for key number locations.
When performing the checks, open loop conditions must exist. An open loop exists when the controller output does
not affect the input pressure or other control signal to the controller.
Note
If the controller has the auto/manual station (suffix letter E), be sure the controller is in the automatic mode before performing
prestartup checks. If the controller has the external feedback option, connect the controller output connection to the external
feedback connection (see figure 2‐5). Adjust the controller for full output pressure and with the RESET knob adjusted to 0.01
minutes/repeat, verify the tubing connections do not leak. Disconnect after completing the prestartup checks.
1. Provide a means of measuring the controller output pressure by connecting the controller output to a pressure
gauge. Connect supply pressure to the supply pressure regulator and be sure it is delivering the proper supply
pressure to the controller. Do not exceed the normal operating pressure in table 1‐6.
2. For a controller with remote set point (suffix letter M), connect regulated pressure of 0.2 to 1.0 bar (3 to 15 psig) or
0.4 to 2.1 bar (6 to 30 psig) to the remote set point connection at the top of the controller case.
3. Remove the two machine screws (key 6) and lift off the proportional band indicator cover (key 36).
4. Adjust the set point a minimum of 20 percent of input span above the process pointer.
5. Turn the reset adjustment to 0.01 minutes per repeat.
6. Turn the rate adjustment to OFF (4195KC controllers).
7. Adjust the proportional band for 5 percent DIRECT.
8. If necessary, connect a pressure source to the process connection and adjust the process pointer to the last mark on
the left side of the scale. If the last scale mark is 0 bar (0 psig), a pressure source is not required.
9. The controller output pressure should be 0 bar (0 psig).
10. Rotate the proportional band to 5 percent REVERSE.
11. The controller output should be within 0.14 bar (2 psig) of the supply pressure.
12. 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 4195KB and KC calibration procedure
for recalibration.
Startup for 4195KB and KC 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.