Watlow Electric SERIES 980/985 Benutzerhandbuch

In the Calibration Menu, various input signals must be supplied in order for the

control to go through its auto calibration. The calibration menu can only be
entered from the LOC parameter in the Setup menu. Press the UP/DOWN
keys simultaneously for 3 seconds   1 second). The CAL parameter appears.

Any inadvertent change in displayed data when pressing UP  & DOWN, is
ignored. At the CAL parameter, press the AUTO/MANUAL key twice to enter

the MANUAL mode. Calibration values are not retained unless in   MANUAL

mode.

Upon entering the calibration menu, the top display window indicates CAL and

keys are inactive until all keys are released. The upper display 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 that is  slewed
up or down until the output value is correct. The control uses the lower display
to prompt the user as to what the input should be.

Once the input has been properly established and maintained for at least 10

seconds, the MODE key may then be used to display the next prompt. After

the final input is established, another press of the MODE key returns the unit to
the configuration menu at the top of the parameter list.

If you make a mistake in calibrating your control, the  rSt prompt at the end of

the calibration menu restores the original factory calibration settings. Simply
select yes and press the MODE key. The original factory calibration values are

restored. Figure 34 on the next pages shows the calibration prompt.

l

NOTE:

output.