Practical Instrument Electronics 334Plus - Manual (Page 7)

Practical Instrument Electronics
82 East Main Street Suite 3.14 • Webster, NY 14580 Tel: 585.872.9350 • Fax: 585.872.2638 • [email protected] • www.piecal.com
Page 7
mA OUT, % OUT (Percent of 4 to 20 mA)
Choose this function to simultaneously supply power to a 2 Wire Transmitter while displaying the 4
to 20 mA output of the transmitter.
1) Disconnect one or both input wires from
the device to be calibrated.
2) Select “mA” or “% 4 to 20mA” with slide
switch q .
3) Select “SOURCE” using slide switch w .
4) Press and turn the knob r clockwise
several times until full scale output
(24.000 mA/125.00%) is obtained. The
display will indicate
“FULL SCALE”.
5) Connect the red source lead of the
PIECAL 334Plus to the plus (+) input of
the device and the black source lead to
the minus (-).
The PIECAL 334Plus supplies a nominal 24 volts DC at 24 mA to the 2 Wire Transmitter. The current
passed by the transmitter will be accurately displayed by the PIECAL 334Plus. Calibrate the
transmitter in the usual manner and disconnect the PIECAL 334Plus. If Ground Leak Detection is
enabled the amount of milliamps leaking in the transmitter or loop is indicated on the display.
Power & Measure 2-Wire Transmitters
Typical
2-Wire
Transmitter
+ IN - REF +OUT-
Transmitter Input
Sensor
Process Signal
Simulated Input
OUT
%
25.42