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DMU-30ACV-1-DR-C Datasheet(PDF) 2 Page - Murata Manufacturing Co., Ltd. |
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DMU-30ACV-1-DR-C Datasheet(HTML) 2 Page - Murata Manufacturing Co., Ltd. |
2 / 3 page 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 ➀ ±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) ➁ 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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