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EB-ACDC Datasheet(PDF) 4 Page - Murata Manufacturing Co., Ltd. |
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EB-ACDC Datasheet(HTML) 4 Page - Murata Manufacturing Co., Ltd. |
4 / 4 page Example Using a DMS-30-1 meter (+/-2V range), Vin is 0-5Vdc and the display reading must be “000” to “1500” 1. Assume R1 = 1.0MΩ. 2. R2 = (FSI x R1) / ( |Vin| - FSI) 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 tolerances in R1 and R2. 4. DC Current Measurements (Use +/-200mV Range DMS-30-0 Meters): When using R2 location for a dc current-shunt, please note that the pc-board copper traces which short out R1 can only carry currents up to 0.2A (200mA). However, dc currents up to 2A can be accommo- dated if a 20AWG jumper wire is soldered in location R1. Be sure R2 has a sufficient power rating to safely carry the full load current. Refer to DMS Application Note 6 for more information on dc ammeters. 1. Install R2: R2 = FSR / (IMAX . x 10000) where FSR is the desired meter reading (0 up to 1999, disregarding any decimal points), and IMAX is current in Amperes. 2. Configure the DMS-EB for span adjust using the procedure previ- ously outlined for the DMS-30-0 (+/-200mV range). 3. Apply the input signal (current) to TB1 (+) HI and (–) LO. 4. Adjust R4 for desired full scale readings. 5. Enable the appropriate decimal point using SG1, SG2, or SG3. Example Using a DMS-30-0 meter, a 0.100 Ampere input must read “100.0” mA on the display. R2 = 1000 / (0.1 x 10000) R2 = 1 Ohm Enable DP3 via SG3 for a display reading of “100.0.” APPLICATIONS 12 R3 SG9 SG11 SG6 SG10 SG14 SG7 SG8 SG13 SG4 SG12 TB1 HI(+) LO(–) 12 DP4 R5 R4 12 R3 SG9 SG11 SG6 SG14 SG7 SG8 SG13 SG4 SG12 TB1 HI(+) LO(–) 12 DP4 R1 R2 Figure 3. R4 and R5 Installation Figure 4. R1 and R2 Installation DMS-EB-AC/DC 100-264Vac Power Supply Accessory Board for DMS-30PC/LCD Panel 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 UK: Milton Keynes, Tel: +44 (0)1908 615232, email: mk@murata-ps.com France: 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 China: 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 Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 www.murata-ps.com 12/30/08 MPM_DMS-EB-AC/DC.B01 Page 4 of 4 |
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