4-4
IM CA71-E
TIP
If either of the following cases applies, the protection circuit works to turn off the
output.
• The output terminals or the lead cables for source connected to the output termi-
nals are short-circuited or an excessive load current has flowed through the cables
when a voltage is being output.
• The output terminals or the lead cables for source connected to the output termi-
nals are open-circuited or an excessive load voltage has been sourced between
the output terminals when a current is being output.
4.2.2
4–20 mA Function
You can set a 4–20 mA signal in 4 mA increments.
Step 1: Using the function selector switch, select
.
Step 2: Using each pair of
and
output setting keys, which corre-
spond to each digit of a value from 4 to 20, set the signal in a
step-by-step manner. You can set the signal in 4 mA incre-
ments or decrements in the order 4
⇔
8
⇔
12
⇔
16
⇔
18
⇔
20 mA. Use the pairs of
and
keys for the decimals to
make fine adjustments, as the keys let you set the decimals in
normal resolution. Pressing the
key initializes the signal
setpoint to the default value (4.00).
Step 3: Pressing the
key causes the
indicator on the LCD
to change from
to
. The calibrator sources the preset
4–20 mA current signal between the output terminals.
Step 4: To turn off the output, press the
key once again. The
appears on the LCD and the output terminals are open-cir-
cuited.
TIP
If the signal setpoint is 3 mA or less, no step-by-step setting is possible even if you
operate the higher-order output setting keys.
4.2 Sourcing DC Voltage, DC Current or SINK Current Signal
