Example

1. Assume R1 = 1.0MΩ.

R2 = (1.500 x 1,000,000) / (5.0 - 1.500)

R2 = 428,571Ω or 432kΩ

3. Calibrate the meter using a known voltage source. Adjust R4 to

compensate for variations in R1 and R2.

7. Current Measurements (Use 200mV Model, DMS-30-0): The follow-

ing instructions are for measuring current derived from the DMS-

30/40's power source. When measuring current that is floating with

respect to J1, pin 6 (POWER RETURN), leave SG5 closed.

CAUTION: Do not exceed 1 Ampere input current

7.2. Open SG5.

7.3. Configure the DMS-EB for span adjust using the procedure previ-

ously outlined for the DMS-30-0 version.

7.4. Apply input signal (current) to (+) IN HI and (–) IN LO.

7.5. Adjust R4 for desired full scale readings.

7.6. Enable the appropriate decimal point using either SG1, SG2, SG3

or SG-17.

Example

A 0.100 Ampere input must read "100.0" on the display.

R2 = 1000 / (0.1 x 10000)

R2 = 1 Ohm

Enable DP3 via SG3 for a reading of "100.0."

HI LO TST TST +V –V

(+) (–) IN OUT

GND

Figure 4. DMS-EB Board

APPLICATIONS

DMS-EB

Multi-Purpose Application Board for DMS-30 & DMS-40 Series Meters

Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other

technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply

the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without

notice.

© 2008 Murata Power Solutions, Inc.

USA:

Mansfield (MA), Tel: (508) 339-3000, email: sales@murata-ps.com

Canada:

Toronto, Tel: (866) 740-1232, email: toronto@murata-ps.com

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Milton Keynes, Tel: +44 (0)1908 615232, email: mk@murata-ps.com

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Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: france@murata-ps.com

Germany:

München, Tel: +49 (0)89-544334-0, email: munich@murata-ps.com

Japan:

Tokyo, Tel: 3-3779-1031, email: sales_tokyo@murata-ps.com

Osaka, Tel: 6-6354-2025, email: sales_osaka@murata-ps.com

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Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com

Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com

Singapore:

Parkway Centre, Tel: +65 6348 9096, email: singapore@murata-ps.com

Murata Power Solutions, Inc.

11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.

Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356

www.murata-ps.com email: sales@murata-ps.com ISO 9001 and 14001 REGISTERED

www.murata-ps.com

12/15/08

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