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DMU-30ACV-1-DR-C Datasheet(PDF) 2 Page - Murata Manufacturing Co., Ltd.

Part # DMU-30ACV-1-DR-C
Description  Ruggedized True-rms ac Voltmeters with Daylight Readable, Auto-Dimming LED Displays
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Manufacturer  MURATA [Murata Manufacturing Co., Ltd.]
Direct Link  http://www.murata.com
Logo MURATA - Murata Manufacturing Co., Ltd.

DMU-30ACV-1-DR-C Datasheet(HTML) 2 Page - Murata Manufacturing Co., Ltd.

  DMU-30ACV-1-DR-C Datasheet HTML 1Page - Murata Manufacturing Co., Ltd. DMU-30ACV-1-DR-C Datasheet HTML 2Page - Murata Manufacturing Co., Ltd. DMU-30ACV-1-DR-C Datasheet HTML 3Page - Murata Manufacturing Co., Ltd.  
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DMU-30ACV Series
Ruggedized True-rms ac Voltmeters with Daylight
Readable, Auto-Dimming LED Displays
MPM_DMU-30ACV_B05 Page 2 of 3
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
www.murata-ps.com
TECHNICAL NOTES (continued)
4. Calibration: Periodic recalibration of DMU-30ACV voltmeters is
not required under most indoor operating environments. However,
units operating in environments subject to vibration and/or extreme
temperature variations should have their accuracy verified on a yearly
basis. If recalibration is necessary, it should only be performed by
qualified technical personnel. Calibration is performed with potentially
lethal voltages applied to the DMU-30ACV and its associated wiring.
A plastic, fully-insulated adjusting tool must be used to access the
recessed potentiometers located on the back of the unit (see Mechani-
cal Specifications). Contact Murata / DATEL if additional information
is required regarding calibration, setup, or any other technical issue
pertaining to DMU-30ACV ac voltmeters.
5. Minimum-Intensity Adjustment Potentiometer: Users can adjust
the DMU-30ACV’s minimum LED display brightness to suit their indoor
viewing requirements by adjusting the ¾-turn, rear-mounted intensity
adjustment potentiometer. Please note, this potentiometer will have
minimal impact on display brightness in high ambient light environ-
ments.
The intensity adjustment potentiometer is factory preset to its mid-
point position. As viewed from the rear of the meter, and with the
model number label facing up, turning the potentiometer clockwise
increases the LED display’s intensity. See the Mechanical Specifica-
tions section for potentiometer locations.
6. 2-Wire Operation: In indoor applications where daylight readability
(i.e., maximum display brightness) is not required, DMU-30ACV meters
will meet their specified accuracy with ac supply voltages (TB1) well
below 85Vac. While performance is not guaranteed, DMU-30ACV
voltmeters’ remain easily readable and accurate with ac supplies as
low as 20Vac in most indoor environments.
Please note, when operated indoors in a 2-wire mode (i.e., TB1 and
TB2 are connected to the same ac voltage), DMU-30ACV series’ input
current will increase as the input supply is decreased. At 20Vac, the
input supply current will be approximately 30mA.
Performance/Functional Specifications
Typical at TA = +25°C, 60Hz sine-wave input, unless otherwise noted.
➀ Specified accuracy applies to inputs with crest factors (CF) up to 2.0, where CF = Vpeak/
Vrms. Crest factors of 2-5 introduce an additional eror of ±3% of full scale. Voltmeters
are calibrated with near full-scale, 60Hz sine-wave input.
➁ Display reading is set to “1888”. Specified power supply currents are steady state; larger
surge currents can occur at initial application of ac power. Power supply input (TB1) set to
120Vac/60 Hz.
Input (TB2)
Min.
Typ.
Max.
Units
Full Scale Input Range:
DMU-30ACV-0
0
19.99
Vac
DMU-30ACV-1
0
199.9
Vac
DMU-30ACV-2
0
300
Vac
Input-Voltage Frequency Range
47
60
1000
Hz
Performance
Sampling Rate
2.5 readings per second
Accuracy
±0.4%FS ±2 counts w/ 60Hz
sine-wave input
Measurement Type
RMS responding, Crest Factors of 1-5
Zero Reading (within 30 sec.)
“–002”
“000”
“002”
Cnts
Temperature Drift (0 to +60°C)
±0.2
±0.4
Cnts/°C
Breakdown Voltage (TB1 to TB2)
2000
Vdc
Supply Voltage (TB1)
DMU-30ACV
85
264
Vac/47-
63Hz
Supply Current (TB1)
DMU-30ACV (total darkness)
4
6
mA/47-
63Hz
DMU-30ACV (full sunlight)
40
50
mA/47-
63Hz
Terminal Block Wiring (TB1 & TB2)
Wire Size
16-22 AWG, Solid or stranded
Insulation Strip Length
0.250 inches (6.35)
Screw Tightening Torque
3.6 pound-inches (0.4Nm)
Rated Voltage
300Vac
Display
Display Type and Size
Daylight readable, auto-dimming,
3½ digit, 0.56"/14.2mm high red LED
Decimal Point
Fixed, model dependent
Overrange Indication
"1___ "
Physical/Environmental
Operating Temperature
–25
+60
°C
Storage Temperature
–40
+75
°C
Humidity (non-condensing)
0
85
%
Dimensions
See mechanical specifications
Weight
1.3 ounces (36 grams) nominal
Ordering Information
Model
Input Range
DMU-30ACV-0-DR-C
0 to 19.99Vac
DMU-30ACV-1-DR-C
0 to 199.9Vac
DMU-30ACV-2-DR-C
0 to 300Vac


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