DPM 970 Lascar Electronics, DPM 970 Datasheet

DPM 970

Manufacturer Part Number

DPM 970

Description

Voltmeter, Digital; Voltmeter Meter Type; LCD; 0.75 in.; 9 VDC (Typ.)

Manufacturer

Lascar Electronics

Type

Voltager

Datasheet

1.DPM_970.pdf (2 pages)

Specifications of DPM 970

Accuracy

0.005 %

Connection Type

Screw

Cut Out, Panel

2.83×1.57 "

Digit Height

0.75

Dimensions

2.99"L×1.73"W×0.34"H

Display Digit Height

0.75 "

Display Type

LCD

Function

Voltage

Meter Type

Voltmeter

Number Of Digits

3-1/2

Primary Type

Electronic

Range, Measurement

0 to 2000 VAC

Special Features

Graphics

Temperature, Operating

0 to +50 °C

Voltage, Supply

9 VDC

Lead Free Status / Rohs Status

RoHS Compliant part

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DPM 970

A 3 ½ digit LCD panel meter, featuring 19mm (0.75“) digit height and LED backlighting, the DPM 970 is a true RMS voltage and current meter with

500V a.c. (2kV ) and 2mA full scale readings as standard. By changing the value of scaling resistors or adding a shunt, this module will measure most

a.c. voltages and currents. The DPM 970 features digital hold function which freezes the last displayed reading. Calibration is achieved via two

multi-turn potentiometers for offset and scale. Connection to the meter is via screw terminals. The module is housed in a robust carrier which can be

bolted in place or panel mounted using the bezel, window and clips provided.

SCALING

The value of the four scaling resistors RA1, RA2, RBI, RD1 and a link

setting (LK2) may be altered in order to change the full scale reading

(F.S.R.) of the meter - see table.

with zero input voltage/current, short circuit ACV and COM and

adjust the ZERO potentiometer.

adjusting the CAL potentiometer.

NOTES

Consult the current transformer manufacturer’s data for connections and recommendations.

Other scaling factors can be achieved via the correct selection of scaling resistor values.

Specifications liable to change without prior warning

Required F.S.R.

200mV

20V

200V

2kV (factory default)

2mA

20mA

200mA

20A

DIMENSIONS

Use inputs ACV and COM for measuring voltage.

For measuring voltages above 500V , external scaling resistors must be used.

Use inputs ACI and COM for measuring current.

When measuring in excess of 200mA use an external scaling resistor. We recommend

the use of a current transformer when measuring in excess of 10 Amps.

19mm (0.75“) Digit Height

Screw Terminal Connections

Digital Hold

500V a.c. (2kV ) Full Scale Reading

Measures Voltage and Current

LED Backlighting

‚

ƒ„

390k

680k

560k

RA1

All dimensions in mm (inches)

To ensure that the meter reads "000"

The meter will need re-calibration by

220k

390k

560k

RA2

76.0 (2.99)

72.5 (2.85)

51.0 (2.01)

61.5 (2.42)

71.5 (2.81)

Not Fitted

390R

100R

0R01

330k

RB1

10R

0R1

39k

3k9

Not Fitted

910k

RD1

Linked

Open

LK2

(0.22)

Ø5.7

(0.12)

Ø3.0

DPM 970

b c

* To ensure maximum accuracy, re-calibrate periodically.

** Maximum safe input voltage across the ACV and COM terminals is 500V

Standard Meter

Specification

Accuracy (overall error) *

Full scale reading **

Resolution

Sample rate

Operating temperature range

Temperature s

Frequency range (input voltage)

Input impedance (2kV range)

DC Supply voltage

Supply current (Backlighting off)

Supply current (Backlighting on)

If voltages to be measured exceed 500V

externally to the module.

d. 11.5 (0.45)

e. 12.5 (0.49)*

1.0 (0.04)

2.0 (0.08)

6.5 (0.26)

Issue 7

tability

*typical depth of tallest component behind PCB,

this dimension is for guidance only.

@ 5Vd.c.

Display in Test Mode

Min.

51 (2.01)

7.5

Digital AC Voltmeter Module

RMS

, then fit scaling resistors

P.P.

Typ.

200

0.5

1.5

Panel cut-out 72 x 40 (2.83 x 1.57)

Maximum panel thickness 3mm (0.12).

Applies to DPM 970/4

Max.

1999

15k

1.5

Stock Number

% (±2 count)

samples/sec

RMS

mA d.c.

ppm/°C

DPM 970

V d.c.

Unit

°C

RMS

Related parts for DPM 970

DPM 970 Summary of contents

Page 1

... DPM 970 A 3 ½ digit LCD panel meter, featuring 19mm (0.75“) digit height and LED backlighting, the DPM 970 is a true RMS voltage and current meter with 2 500V a.c. (2kV ) and 2mA full scale readings as standard. By changing the value of scaling resistors or adding a shunt, this module will measure most a ...

Page 2

... V+ PSU 303 -5V Neutral V- 0V DPM 970 Issue 7 Phase LP+ V+ +5V COM -5V V- LP- Neutral Powering the LED backlighting on a DPM 970 from the PSU 303's +5V and COM outputs. Voltage V+ ACV COM V- +5V Current V+ ACI Load -5V COM V- Single Phase Current and Voltage Measurement ACI ...

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