Watlow Series 93 User Manual download pdf (Page 35)

Appendix

Watlow Series 93 Appendix ■ A.3

Figure A.3 -

Entering the

Calibration Menu.

NOTE:

While in the Calibra-

tion Menu, the con-

troller output(s) go

off and the alarm

output (if present) is

on.

NOTE:

Calibration values

will not be retained

unless you are in the

MANUAL mode. Do

not enter the MAN-

UAL mode until you

are at the correct

input parameters.

Calibration

Before attempting to calibrate, make sure you read through

the procedures carefully and have the proper equipment

called for in each procedure. Make sure the DIP switches

are in the proper position for the input type. See Chapter

Four.

Entering the Calibration Menu

In the Calibration Menu, various input signals must be supplied for the con-

troller to go through its auto calibration. The Calibration Menu can only be

entered from the [`LOC] Lock parameter in the Setup Menu. Press the ¿Up-

arrow/¯Down-arrow keys simultaneously for 3 seconds (± 1 second). The [`CAL]

parameter appears in the lower display with "no" in the upper display.

Any inadvertent change in the displayed data, when pressing the ¿Up-

arrow/¯Down-arrow keys, is ignored. Calibration values won't be retained unless

you are in the manual mode. Press the ¿Up-arrow or ¯Down-arrow key to

change the upper display to [`YES] Press ‰Advance to enter the calibration se-

quence.

Upon entering the calibration menu, the upper display window indicates [`CAL].

It continues to indicate [`CAL] (with the exception of calibration of the 4-20mA

output) while the operator walks through the entire calibration parameter list.

While calibrating the 4-20mA output, the upper display contains a numeric value

to be slewed up or down until the output value is correct. The controller uses the

lower display to prompt the user as to what the input should be.

With the [`dFL] parameter, select either [``SI] (System International) and

the displayed parameters are °C, integral, derivative and proportional band in %

of span. Or select [``US] parameters which include displaying °F, rate, reset and

proportional band in degrees or units.

Once the information has been properly established and maintained for at least 5

to 10 seconds, the ‰Advance key may then be used to display the next prompt.

After the final input is established, press the ‰Advance key twice to return the

controller to the configuration menu at the top of the parameter list.

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