Practical Instrument Electronics 334Plus - 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 0.00 to 24.00 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
334Plus 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.
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 334Plus 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
Milliamp Receiver Input
Controller
Transmitter
Computer
Logger
I/P
DCS
OUT
20.000
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 334Plus 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