Martel Electronics 235 - Manual (Page 39)

begin making thermocouple measurements and display the readings on
the left-hand side of the display.
The top line of the display contains information about the
measurements.
The first three characters indicate the type of reference junction
compensation in effect.
Int = automatic compensation using the INTERNAL sensor.
Ext = automatic compensation using the EXTERNAL sensor.
Man = manual compensation.
Next is the single character thermocouple designation followed by the
temperature scale selected.
OBSERVE THERMOCOUPLE POLARITY. The negative lead of the
thermocouple connects to the V/TC black (negative) terminal of the
calibrator.
The ranges, resolutions, and accuracy of the various thermocouples can
be found on page 83.
RTD/OHMS
The 230/235 calibrator supports two 100 ohm Platinum RTD curves, the
European/DIN 43760 α=.00385 and the American α=.003916 curve, 120
Ohm Nickel Minco and 10 Ohm copper SAMA RC21-4-1966 with read
out in degrees Celsius or Fahrenheit. Measurements may be made in 2-
wire, 3-wire, or 4-wire mode and readings displayed in degrees Celsius
or Fahrenheit.
To measure Ohms:
Press the RTD/Ω key when the calibrator is in the input mode. (Note:
on the 230, press the Ω key).
Input Functions
230/235 34
Int J °F
+ 212.0