Practical Instrument Electronics 434 - Manual (Page 4)

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 4
mA OUT, % OUT (Percent of 4 to 20 mA)
Choose this function to provide an output from 0.000 to 24.000 milliamps. The compliance voltage
is a nominal 24 VDC to provide the driving power to your milliamp receivers.
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) Connect the output leads of the PIECAL
434 to the inputs of the device being cali-
brated, making sure to check polarity. Red
lead to the plus (+) input and black lead to
the minus (-) input.
The output 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.
Sourcing Milliamps
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%
OUT
mA
20.000
3
Milliamp Receiver Input
Controller
Transmitter
Computer
Logger
I/P
DCS
Using Automatic STEP & RAMP output
Move
q POWER SWITCH to “mA”, or “% 4 to 20 mA” and
the w SOURCE / READ / 2 WIRE SWITCH to “SOURCE” or “2 WIRE”.
The starting point for automatic stepping & ramping is based
on the
e EZ-CHECK SWITCH. Place the EZ-CHECK switch
at 20 mA and the automatic stepping or ramping will start at
20.000 mA (100.00%) and the values will decrease. Place the
EZ-CHECK switch at 4 mA and the automatic stepping or
ramping will start at 4.000 mA (0.00%) and the values will
increase.
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.
Using Automatic Stepping & Ramping
STEPPING OUT
12.000
mA