4.4.2
Constant Current Output (SIMULATE mode)
When the SIMULATE (SINK) function is enabled, the CA450 can sink the specified amount
of current from an external voltage source (such as a distributor) through the SIMULATE(+)
terminal, and you can use the CA0 to simulate a two-wire system transmitter in a loop test.
(You can connect the CA0 instead of a transmitter to test a transmitter or signal conditioner.)
CAUTION
• When sinking 20 mA from an external power source, keep the voltage within the
range of to 8 V.
• Set the polarity of the applied voltage as shown in the figure below, and be careful
not to apply voltage in the opposite direction.
Two-wire system transmitter
SIMULATE
(SINK)
) Turn the function switch to the "
After you turn the function switch, "OUTPUT" appears on the screen, and the output is
set to 0% of the current span setting.
(If you turn the function switch from the "
output value setting and SOURCE/SIMULATE setting are retained.)
2) Press the SHIFT key. "SIMULATE" appears. (Current sinking starts.)
4 to 20 mA
Black
Red
Transmitter (signal conditioner)
Distributor
" position.
" position to the "
6
" position, the