Watlow PM PLUS 6 User Manual

Watlow PM PLUS™ 6 • 80 • Chapter 8: Features
Use Calibration Offset
Use of the Calibration Offset parameter shifts the readings across the entire displayed range by the offset
value. Use this parameter to compensate for sensor error or sensor placement error. Typically this value is
set to zero.
1. Navigate to Operations — Setup - Analog Input - Calibration Offset
2. Set the offset to the desired value.
Time
Temperature
Temperature Reading
from Sensor
Actual Process Temperature
Negative Calibration Offset will
compensate for the difference
between the Sensor Reading and
the Actual Temperature
Equipment required while performing calibration:
Obtain a precision source for millivolts, volts, milliamperes or resistance depending on the sensor type to
be calibrated. Use copper wire only to connect the precision source to the controller’s input. Keep leads
between the precision source and controller as short as possible to minimize error. In addition, a precision
volt/ohm meter capable of reading values to 4 decimal places or better is recommended. Prior to calibra-
tion, connect this volt/ohm meter to the precision source to verify accuracy. Actual input values do NOT have
to be exactly the recommended values, but it IS critical that the actual value of the signal connected to the
controller be accurately known to at least four digits.
Time
Temperature
Autotune begins
Process Set Point
Autotune Set Point
(90 percent of Process Set Point)
Autotune complete

Watlow PM PLUS 6 Specifications

General

Brand	Watlow
Model	PM PLUS 6
Category	Controller
Language	English