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Practical instrument electronics, Reading milliamp outputs, Read dc volts – Practical Instrument Electronics 434 User Manual

Page 6: Read, 3) select “read” using slide switch

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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 6

Signals exceeding ±60.00 VDC are indicated
by i on the display.

Reading Milliamp Outputs

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%

4.340

READ

mA

Milliamp Output Signal

Controller

Transmitter

P/I

DCS

READ V

Choose this function to measure from -99.99 to +99.99V DC.
1) Select

“VDC” with slide switch

q

.

2) Connect the red (+) and black (-) leads of the PIECAL 434

across the voltage source to be measured.

Any DC voltage from -60.00 to +60.00 volts may be
measured. Loop power supplies, signal voltages at receivers,
batteries and transmitter voltage drops may be measured.
Signals exceeding ±60.00 VDC are indicated by i on the
display. Signals exceeding ±99.99 VDC will be indicated by
“OVERRANGE” flashing on the display.

Read DC Volts

Voltage to be Measured

Battery

Loop Power Supply

Transmitter Voltage Drop

1 to 5 Volt Loops

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%

24.34

READ

V

READ

i

72.83

V

READ mA, READ % (Percent of 4 to 20 mA)

Choose this function to measure from 0.000 to 24.000 milliamps or -25.00 to 125.00%.

1) Open the current loop at any conve-

nient point along the signal path.

2) Select “mA” or “% 4 to 20mA” with slide

switch

q

.

3) Select “Read” using slide switch

w

.

4) Connect the red input lead (+) of the

PIECAL 434 to the more positive point
of the break and the black input to the
more negative point.

Signals below 0 mA or open circuits are
indicated by 0.000 mA (-25.00%) on the
display. Signals above 52 mA are current
limited by protection circuitry and
“OVERRANGE” is flashed on the display.