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2 Wire mA, 2 Wire % (Percent of 4 to 20 mA)
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 100 VDC
1) Disconnect one or both input wires
from the device to be calibrated.
2) Select "mA" or "% 4 to 20mA" with
slide switch
3) Select "2 WIRE" using slide switch
.
w
4) Connect the red input lead of the
434 to the plus (+) input of the field
connections and the black lead to
the minus (-).
Loop current is adjusted in 0.001 mA (0.01%) increments by turning the knob
EZ-CHECK™ switch
4.000mA (0.00%) or 20.000mA (100.00%) with switch
with 0.100 (1.00%) increments.
Start automatic stepping or ramping by pressing and holding the
word STEPPING or RAMPING will flash on the display anytime the selected automatic function is
running. The PIECAL 434 will automatically step or ramp between 4mA & 20mA (or 20mA & 4mA)
for 30 seconds then reverse direction. Stop the stepping or ramping by pressing or turning the knob
or moving any switch.
To change the Automatic Stepping & Ramping settings
Double click the
seconds:
Turn the
r
DIAL KNOB to move through the menu. Press the
and ON or to change the steps setting. These settings are remembered even with the power off.
EXIT MENU - exits this menu immediately and saves any changes. Menu will automatically exit after
30 seconds of inactivity.
STEPS - pressing the knob will cycle from 2, 3, 5 steps and RAMP.
2 steps will automatically switch between 4 & 20 mA (0 & 100%).
3 steps between 4, 12 & 20 mA (0, 50 & 100%).
5 steps between 4, 8, 12, 16 & 20 mA (0, 25, 50, 75 & 100%).
RAMP will continuously ramp the output between 4 & 20 mA (0 & 100%).
82 East Main Street Suite 3.14 • Webster, NY 14580 Tel: 585.872.9350 • Fax: 585.872.2638 • sales@piecal.com • www.piecal.com
0.561.8187
Simulate 2-Wire Transmitters
q
.
e
is in the "DIAL" position, or the current can be set at the fixed points of
Setting Up Automatic Stepping & Ramping
r
DIAL KNOB at any time the unit is on and the following display will appear for 30
Practical Instrument Electronics
www.
Receiver
Powers External
2-Wire Transmitter
Power Supply
(2 to 100 VDC)
e
. Press and turn the knob for faster dialing
r
.com
To
Sensor
2 WIRE
12.004
mA
AUTOMATED DIAGNOSTIC CALIBRATOR
4-20 mA
VDC
%mA
mA OFF
Power 2 Wire
Transmitters
100%
DIAL
0%
Dial Output to
FULL SCALE to
Push & Turn
Power 2 Wire
for
Fast Dialing
Transmitters
Push & Hold
to
Store/Step
Double Click
for Options
(Disconnected)
r
DIAL KNOB for 3 seconds. The
DIAL KNOB to toggle between OFF
information@itm.
+ IN -
REF +OUT-
Typical
2-Wire
Transmitter
r
while the
Page 5
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