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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
Operating Instructions
Typical
2-Wire
Transmitter
+ IN - REF -OUT+
Transmitter Input
Sensor
Process Signal
Simulated Input
11.997
mA
HART
5 6
PWRM
Power/Measure mA, Power/Measure % (Percent of 4 to 20 mA)
Choose this function to simultaneously supply power to a 2 Wire Transmitter while displaying the
4.000 to 20.000 mA output of the transmitter.
Move the power switch
w
to READ then Double Click the EZ-DIAL knob to get into the menu. Turn
the knob
e
to scroll through the settings and press the knob to make your selection. Select
mA
for
the
FUNCTION
and
PWR MEAS
for the
MODE
. Choose either
mA
or
%
and whether you need
the 250
Ω
HART resistor active in the loop.
Disconnect one or both input wires from the device to be calibrated. Connect the red source lead of
the PIE 311Plus to the plus (+) input of the device and the black source lead to the minus (-).
The PIE 311Plus 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 PIE 311Plus. Calibrate the transmitter
in the usual manner and disconnect the PIE 311Plus. Signals above 24 mA are current limited by
protection circuitry with “OVERRANGE” flashed on the display and the red OVERLOAD LED lit.
To
Sensor
Typical
2-Wire
Transmitter
(Disconnected)
+ IN - REF +OUT-
Powers External
2-Wire Transmitter
Power Supply
(2 to 60 VDC)
Receiver
12.422
mA
5 6
2-WIRE
Choose this function to simulate a 2 Wire Transmitter output from 0.000 to 24.000 milliamps.
Operates in loops with power supply voltages from 2 to 60 VDC.
Move the power switch
w
to
SOURCE
then Double Click the EZ-DIAL knob to get into the Menu.
Turn the knob to scroll through the settings and press the knob to make your selection. Select
mA
for the
FUNCTION
and
2W SIM
for the
MODE
. Choose either
mA
or
%
and whether you need
the 250
Ω
HART resistor active in the loop.
Connect the output leads of the PIE 311Plus to the inputs of the device being calibrated, making sure
to check polarity. Red lead to the plus (+) input and black lead to the minus (-) input.
Instantly output your SPAN and ZERO output settings by moving the EZ-CHECK switch between HI
and LO (defaults to 20 & 4 mA). You may also select any third output setting (such as mid-range)
using the SET position on the EZ-CHECK switch. The output is adjusted in 0.001 mA (0.01%)
increments by turning the knob
e
. Press and turn the knob for faster dialing with 0.100 mA (1.00%)
increments.
2 Wire SIM mA, 2 Wire SIM % (Percent of 4 to 20 mA)
All Milliamp Connections