DMS-30DR-1-R-C Murata Power Solutions Inc, DMS-30DR-1-R-C Datasheet - Page 5

• Manufacturer Part Number: DMS-30DR-1-R-C
• Description: DPM LED 2V 3.5DIG DAYLIGHT RED
• Manufacturer: Murata Power Solutions Inc
• Type: Voltmeterr
• Series: DMS-30DRr

Specifications of DMS-30DR-1-R-C

• Display Type: LED
• Measuring Range: ±2V
• Display Style: Red Characters, Black Background
• Display Face Size: 2.09" L x 0.84" W (53.1 x 21.3mm)
• Display Digits: 3.5
• Display Digits - Height: 0.560" (14.22mm)
• Backlight: Without
• Mounting Type: Panel Mount
• Termination: PC Pins
• Voltage - Supply: 4.75 ~ 5.25V
• Equipment Type: Panel Meters
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 811-1034

APPLICATIONS
6. Digital Ammeter: Digital ammeters are fi nding ever-increasing usage
4-20mA
85-264Vac
+
–
Example: For a meter with a 2V full scale input (1.999 full
scale reading) and a desired display reading of
"1000" (with an input of 20mA), V
To calibrate the circuit of Figure 7, perform the following:
1. With 4mA applied, adjust the 50kΩ potentiometer (R2) to
2. With 20mA applied, adjust the gain-adjust potentiometer on
because analog-style ammeters (moving-vane types) now cost roughly
the same as their digital counterparts. Additionally, analog ammeters
are not nearly as rugged as modern digital panel voltmeters. Figure 9
illustrates a typical ammeter application. The circuit uses a ±200mV
input meter — the preferred range for most ammeters — to measure
the voltage developed across a 0.1Ω current shunt. The circuit shown
display a reading of "000" (assuming that is the desired
reading).
the back of the meter to display a reading of "1000". For
different full scale readings, alter the value of R
AC to DC Converter
R1
R
R
Shunt
Shunt
ANA COMM
50k
(–) IN LO
Figure 7. 4-to-20mA Current Loop Operation
(+) IN HI
R2
= 1.000V/(0.020 – 0.004)A
= 1.000V/0.016A = 62.5 Ohms
11
10
12
1.225V
REF
9
Fsr
= 1.000 Volts
DMS-30DR-1
5V SUP
1
Shunt
5V RET
3
accordingly.
www.murata-ps.com/dpm
7
REF IN
8
REF OUT
7. External Gain Adjustment: Connect REFERENCE OUT
represents a basic ammeter connection diagram. A detailed application
note describing digital dc ammeters is available at www.cd4power.com.
(pin 8) to REFERENCE IN (pin 7) for normal, factory calibrated,
operation. Use the +1.225V REFERENCE OUT (pin 9) for applica-
tions needing external gain adjustment. Figure 10 shows the wiring
confi guration for each model. Calibration is performed with a precise,
near-full-scale, input voltage.
Figure 8. Basic DC Ammeter Circuit
Sunlight Readable, 3½ Digit Panel Meters
Figure 9. External Gain Adjustment
DMS-30DR Series
03 Aug 2010 MPM_DMS-30DR.B05 Page 5 of 6
with Auto-Dimming LED Displays
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