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4-12

IM CA71-E

4.4.2 When No RJ Sensor Is Used

From the output terminals, the calibrator sources a thermoelectromotive

force corresponding to the preset temperature of a selected

thermocouple. The thermoelectromotive force is sourced with

reference to 0°C.

Step 1: Using the function selector switch, select

Step 2: Using the

key, select the type of thermocouple.

Select the type from K, J, E, T, R, B, S, N, L and U.

The selected type of thermocouple is shown on the LCD.

Step 3: Set the output value digit by digit using each pair of

and

output setting keys.

Each pair of

and keys corresponds to each digit of the

LCD reading. Each press of the

or key increases or

decreases the digit. Increasing the digit from 9 or decreasing

it from 0 causes the digit to overow or underow, allowing

you to set the output value without interruption. Holding down

the

or key continuously changes the digit in question.

Pressing the

key initializes the output setpoint to the

default value (600°C for a type-B thermocouple).

Step 4: Pressing the

key causes the indicator on the LCD

to change from to . A thermoelectromotive force (mV)

equivalent to the preset temperature develops between the

output terminals.

Step 5: To turn off the output, press the

key once again.

The appears on the LCD and the output terminals are

open-circuited.

4.4 Sourcing Thermocouple (TC) Signals

YOKOGAWA CA71 HANDY CAL User Manual

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