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ACM20-5-AC1-R-F-C Datasheet(PDF) 2 Page - Murata Manufacturing Co., Ltd. |
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ACM20-5-AC1-R-F-C Datasheet(HTML) 2 Page - Murata Manufacturing Co., Ltd. |
2 / 6 page Measurement Limits Min. Typ. Max. Units AC Voltage 85.0 - 264.0 Volts AC Current, 10A models ➀ AC Current, 32A models ➀ AC Current, 100A models ➀ 0.00 0.00 0.0 - - - 9.999 32.00 100.0 Amperes Amperes Amperes Active Power: 10A models Active Power: 32A models Active Power: 100A models 0 0 0 - - - 999.9 9999 26.4 Watts Watts kW Frequency 47.0 - 63.0 Hz Power Factor .00 1.00 - - Overcurrent Rating ➁ 1.5 x rated full-scale current Performance Sampling Rate 2-3 samples / sec Voltage Accuracy ➂ ±1% Current Accuracy ➂ ±1% Power Accuracy ➂ ±2% Frequency Accuracy ➂ ±0.1 Hz Power Factor Accuracy ±3% Measurement Bandwidth 140Hz (Voltage), 14kHz (Current) Temperature Drift (0 to 60ºC) 0.5 Counts/ºC Zero-Current Reading (within 2 sec.) 0.00 Amps Zero-Power Reading (within 2 sec.) 0 Watts Supply Voltage (TB1) (Measurement Category II) All Models – 47-63 Hz 85 120 264 Vac Supply Current ➃ All Models 35 50 110 mA Power Supply Terminal Block Wire Size 16-22AWG, solid or stranded Insulation Strip Length 6.4mm (0.250 in) Screw Tightening Torque 0.4Nm (3.6 lb-in) Rated Voltage 300Vac Display Display Type and Size 4 Digit LED, 9.14mm (0.36in) high Overrange Indication Flashing ‘9999’ Watts ➄ Decimal Point Selection Automatically Set Physical/Environmental Operating Temperature 0 – +60 °C Storage Temperature –40 – +75 °C Humidity (non-condensing) 0 – 85 % Dimensions See mechanical specifications Weight: 32A models Weight: 100A models 1.3oz (37.9g) 1.5oz (43.5g) Hex Nut Tightening Torque 0.14 N-m (20 ozf-in) ➀Specified full-scale currents are those passing through the power meter’s built-in current transformer’s primary load-circuit. ➁The overcurrent rating of 1.5 x the rated full-scale current is a continuous rating and applies to the current passing through the built in current transformer. Accuracy is guaranteed up to the rated current. ➂ACM20 Power Meters are calibrated with near full-scale 60Hz sine-wave inputs. ➃All specified maximum supply currents are steady state; larger surge currents can occur at initial application of line power. ➄Applies to 10A and 32A models only. Performance/Functional Specifications Typical at TA=+ 25ºC, 120Vac @ 60Hz, unless otherwise noted ORDERING INFORMATION ACM20-2-AC1-R-C 10A, 85-264Vac Supply (Power Factor Reading) ACM20-5-AC1-R-C 32A, 85-264Vac Supply (Power Factor Reading) ACM20-4-AC1-R-C 100A, 85-264Vac Supply (Power Factor Reading) ACM20-2-AC1-R-F-C 10A, 85-264Vac Supply (Frequency Reading) ACM20-5-AC1-R-F-C 32A, 85-264Vac Supply (Frequency Reading) ACM20-4-AC1-R-F-C 100A, 85-264Vac Supply (Frequency Reading) TECHNICAL NOTES IMPORTANT! To ensure safe and reliable operation, ACM20 power meters must be installed and serviced by qualified technical person- nel. Contact Murata Power Solutions if there is any doubt regarding their installation or operation. 1. Measurement Type: ACM20 series multifunction AC power meters employ a precision energy metering integrated circuit and a low- power microcontroller to measure and display the rms voltage and current, active (real) power, power factor (or line frequency on ‘–F’ suffix models) of ac mains supplies from 47-63Hz. Please note, ACM20 power meters use the voltage present at their TB1 terminal block and the secondary current of their built-in current transformer L1 to calculate and then display VOLTS, AMPS, WATTS, power factor (PF), or line frequency on ‘-F’ HERTZ models. While the ACM20 displays the rms value of line voltage and line current, the VOLTS reading has an upper limit of 140Hz (-3db point), which means rectangular-shaped voltage waveforms, and waveforms with sharp transitions, will read lower than their true-rms value. For example, a square wave line voltage will read approximately 1-2% lower, a triangle wave will read 3% lower, and a modified sine wave will read 18% lower. The oscillograms on page seven illustrate typical ACM20 VOLTS readings when powered from four ac waveforms. The 140Hz bandwidth limit does not apply to the WATTS reading nor to the AMPS reading. The circuitry used for these two measurements has an upper bandwidth of 14kHz. ACM20 power meters are mains operated devices designed to measure ac currents and voltages, within the specified limits previously noted. DC currents and voltages will not be measured accurately. 2. Basic Operation: Upon application of ac power to TB1, the unit will first perform a self-test routine and then continuously display ac volts with the VOLTS LED annunciator illuminated. The display will remain in the VOLTS mode as long as the front panel ‘SEL’ button is not touched. After the unit powers up to normal operation in the VOLTS reading mode, momentarily (approximately one second) touching the ‘SEL’ button on the unit’s front panel three times in succession will cycle the display to AMPS, WATTS, and end at PF (or HERTZ for ‘–F’ mod- els). Momentarily touching ‘SEL’ a fourth time will return the display back to the VOLTS reading mode. Holding the ‘SEL’ button down for 3 seconds will place the unit in a continuous auto-cycling mode, and the display will repetitively scroll through all four measurements, with each measurement remaining displayed for 3 seconds. ! ACM20 Series Four-Function AC Power Meters www.murata-ps.com/dpm email: sales@murata-ps.com 03 Mar 2011 MPM_ACM20 Series.A09 Page 2 of 6 |
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