Practical-instrument-electronics 334Plus Manual do Utilizador descarregar pdf (Página 5)

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 cali-

brated.

2) Select “mA” or “% 4 to 20mA”

with slide switch

3) Select “2 WIRE” using slide

switch

4) Connect the red input lead of

the 334Plus 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 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.













  



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











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

1 2 3 4 5 6 7 8 9 10 11 12

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