IM CA71-E
4-9
Source
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App
■ Output Method Based on Three-wire Connection
Attach another lead cable to the L output terminal, as shown in
the following figure. The output is provided through the three wires,
H, L and L’. Connect these three wires to the device being calibrated.
CA71
SOURCE
Three-wire measuring equipment
H
H
L
L'
L
Three-wire Connection for Resistance Signal Source
Step 1:
Using the function selector switch, select
400Ω RTD
.
Step 2:
Using the
key, select the range.
Pressing the
key cycles through the 400 Ω,
PT100 and JPT100 options.
Step 3:
Set the output value digit by digit using each pair of
and keys.
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 overflow or underflow, 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 (0).
Step 4:
Pressing the
key causes the
indicator on
the LCD to change from
to .
The calibrator sources the preset resistance value 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.
4.3 Sourcing Resistance or RTD Signal
