205-TC Datasheet, PDF (18/22 Pages) List of Unclassifed Manufacturers – THERMOCOUPLE MINIATURE PANEL THERMOMETER

3.4 Sensor Input Connections
Table 3-1. AMERICAN (USA) THERMOCOUPLE WIRE COLORS
T/C
TYPE
J
K
T
E
"+" LEAD WIRE
ALLOY/WIRE COLOR
Iron (white)
Chromel (yellow)
Copper (blue)
Chromel (purple)
"-" LEAD WIRE
ALLOY/WIRE COLOR
Constantan (red)
Alumel (red)
Constantan (red)
Constantan (red)
The meter is configured at the factory for the desired
thermocouple type (J, K, T, E) and the desired units of measure
(°C or °F), as defined by the customer at the time of purchase.
The meter configuration is defined in the part number. For
example, a Type T meter that reads in degrees Fahrenheit
would have a "-TF2" in the part number. The “1” at the end of
the part number indicates a 1 degree resolution and “2” at the
end of the part number indicates a 0.1 degree resolution. See
Table 1-1 for model number listing.
Once the meter is configured for a particular
thermocouple type, it CANNOT be changed to accept any
other input type. It becomes dedicated to that
thermocouple type as ordered.
Meter calibration must be performed using a
thermocouple calibrator. If a millivolt source is used
instead, be sure to connect the output of the millivolt
source to an Omega MCJ Electronic Ice Point (or
equivalent) of the appropriate thermocouple type (or an
ice bath). Doing this will compensate for the cold junction
errors.
4.2 CALIBRATION PROCEDURE
Refer to Section 4.2.1 for details on how to calibrate the
meter using the Thermocouple Calibrator. Refer to Section
4.2.2 for details on how to calibrate the meter using the
Millivolt Source.
4.2.1 Thermocouple Calibrating
1. Disconnect the power from the meter. Remove the
front lens. Notice the the zero potentiometer (pot) is
located to the left of the display and the span
potentiometer is located to the right of the display.
Refer to Figure 4-1 for the location of the calibration
pots.
ZERO
SPAN
Figure 4-1. Calibration Potentiometers
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