Control Calibrating Temperature Sensors; Temperature Sensors - Conair Thermolator TW-1 User Manual

TW-1, TW-2
C
ONTROL
C
ALIBRATING
T
EMPERATURE
S
ENSORS
Special Tools Needed:
r type K thermocouple
calibrator
5-10
M
AINTENANCE
Thermolators with TW-1 or TW-2 controls use type "K" ther-
mocouples to sense the temperature in the return and supply
process lines. These thermocouples should be calibrated annu-
ally, or when a new thermocouple is installed, to ensure cor-
rect operation.
The Thermolator's Calibration Mode provides zero and span
calibration of both the supply and return line thermocouples.
You access the Calibration Mode while in Test Mode.
1
Enable Test Mode.
See Performing System Tests, Section 5.
2
Press any button to display the first test menu.
3
Select the Calibration Mode menu.
Press and hold the Setpoint
index to each test menu until the controller indicates
"SC.L" in the Actual display.
4
Release the Setpoint
You are now in calibration mode. Each press and release
of this key will exit the current calibration and start the
next calibration. The table below lists the calibrations that
will be performed.
CALIBRATION
Zero Calibrate Supply Sensor
Zero Calibrate Return Sensor
Span Calibrate Supply Sensor
Span Calibrate Return Sensor
5
Using the thermocouple calibrator, apply the
appropriate temperature to the control input.
Thermolator TW Series
key for 3 seconds to
key.
SETPOINT ACTUAL
DISPLAY DISPLAY
32°F (0°C) SC.L
32°F (0°C) rC.L
510°F (266°C) SC.H
510°F (266°C) rC.H
UGH025-0504