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 5
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
Simulate 2-Wire Transmitters
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
“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
r
while the
EZ-CHECK™ switch
e
is in the “DIAL” position, or the current can be set at the fixed points of
4.000mA (0.00%) or 20.000mA (100.00%) with switch
e
. Press and turn the knob for faster dialing
with 0.100 (1.00%) increments.
Start automatic stepping or ramping by pressing and holding the
r
DIAL KNOB for 3 seconds. 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
Sensor
Typical
2-Wire
Transmitter
(Disconnected)
+ IN - REF +OUT-
Receiver
Powers External
2-Wire Transmitter
Power Supply
(2 to 100 VDC)
Power 2 Wire
Transmitters
Dial Output to
FULL SCALE to
Power 2 Wire
Transmitters
DIAL
AUTOMATED DIAGNOSTIC CALIBRATOR
4-20 mA
Push & Hold
to
Store/Step
Push & Turn
for
Fast Dialing
Double Click
for Options
VDC
%mA
mA OFF
100%
0%
12.004
2 WIRE
mA
To change the Automatic Stepping & Ramping settings
Double click the
r
DIAL KNOB at any time the unit is on and the following display will appear for 30
seconds:
Turn the
r
DIAL KNOB to move through the menu. Press the
r
DIAL KNOB to toggle between OFF
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%).
Setting Up Automatic Stepping & Ramping
www.
.com
1.800.561.8187
