ACM20 Series www.murata-ps.com Four-Function AC Power Meters PRODUCT OVERVIEW Actual size C US E156931 Murata Power Solutions ACM20 series AC power meters display the most critical measure- ments in mains-powered equipment: voltage, amperage, active power (watts), and power factor. A front panel selector-switch provides two modes of operation: a xed reading of FEATURES any of the four parameters, or a continuous cycling through all four measurements. An Displays AC Volts, Amps, Watts, and Power Factor or Hertz optional model displays line frequency with 0.1Hz resolution. All ACM20 multi-function Two display modes: continuous auto cycling or xed power meters include built-in current transformersno other user-supplied components are required. Universal 85-264Vac (47-63Hz) operating range (Measurement Category II) ACM20 series AC power meters are available in a choice of three input ranges: 0-10A (with Built-in current transformers simplify installation choice of 0.001A resolution, 999.9 watts max.) 0-32A (with 0.01A resolution, 9999 watts max.) and 10A, 32A, or 100A ranges 0-100A (0.1A resolution, 26.4kW max.). An 85-264Vac (47-63Hz) operating supply range makes these power meters perfect for worldwide power monitoring applications. And, Ideal for power distribution units (PDUs) and power strips unlike conventional, average-responding products, ACM20 power meters can accurately True-rms readings of complex voltage and current waveforms display the real power and true-rms current values of triangle waves, square waves, and Low-power consumption: less than watt from 120Vac other irregularly shaped waveforms, with a typical accuracy of 1% of full scale. One-piece polycarbonate housing ts 0U & 1U racks Their large (0.36 /9.2mm), bright red LED display makes ACM20 AC power meters easily Surface mount design occupies minimal panel space readable from as far as 15 feet (5 meters). All units are packaged in a one-piece, vibration resistant, polycarbonate housing that can be installed in vertical 0U and 1U rack spaces. Bright red LED-display with four annunciators Their miniature size is perfect for UPS power sources, power strips, laboratory instrumenta- Optional Frequency reading models (0.1Hz resolution) tion, alternative energy applications, and any other products that require precise monitoring Approvals to UL/CSA/IEC/EN 61010-1 of AC power. SIMPLIFIED SCHEMATIC DIAGRAM VOLTS AMPS WATTS PF LOAD CURRENT +5V L1 A/D CONVERTER +5V CURRENT B +5V LIMITED 85-264 Vac AC/DC MICRO- A 47-63 Hz CONVERTER CONTROLLER SUPPLY For full details go to www.murata-ps.com/rohs SEL www.murata-ps.com/support MPM ACM20 Series.C01 Page 1 of 6 New Low-Wattage Models AvailableACM20 Series Four-Function AC Power Meters Performance/Functional Speci cations Typical at TA=+ 25C, 120Vac 60Hz, unless otherwise noted Measurement Limits Min. Typ. Max. Units ORDERING INFORMATION AC Voltage 85.0 - 264.0 Volts ACM20-2-AC1-R-C 10A, 85-264Vac Supply (Power Factor Reading) AC Current, 10A models 0.00 - 9.999 Amperes ACM20-5-AC1-R-C 32A, 85-264Vac Supply (Power Factor Reading) 0.00 - 32.00 Amperes AC Current, 32A models 0.0 - 100.0 Amperes AC Current, 100A models ACM20-4-AC1-R-C 100A, 85-264Vac Supply (Power Factor Reading) Active Power: 10A models 0 - 999.9 Watts ACM20-2-AC1-R-F-C 10A, 85-264Vac Supply (Frequency Reading) Active Power: 32A models 0 - 9999 Watts ACM20-5-AC1-R-F-C 32A, 85-264Vac Supply (Frequency Reading) Active Power: 100A models 0 - 26.4 kW ACM20-4-AC1-R-F-C 100A, 85-264Vac Supply (Frequency Reading) Frequency 47.0 - 63.0 Hz Power Factor .00 1.00 - - TECHNICAL NOTES 1.5 x rated full-scale current Overcurrent Rating IMPORTANT To ensure safe and reliable operation, ACM20 power Performance meters must be installed and serviced by quali ed technical person- Sampling Rate 2-3 samples / sec nel. Contact Murata Power Solutions if there is any doubt regarding Voltage Accuracy 1% their installation or operation. Current Accuracy 1% 1. Measurement Type: ACM20 series multifunction AC power meters Power Accuracy 2% employ a precision energy metering integrated circuit and a low- Frequency Accuracy 0.1 Hz power microcontroller to measure and display the rms voltage and current, active (real) power, power factor (or line frequency on F Power Factor Accuracy 3% suf x models) of ac mains supplies from 47-63Hz. Please note, Measurement Bandwidth 140Hz (Voltage), 14kHz (Current) ACM20 power meters use the voltage present at their TB1 terminal Temperature Drift (0 to 60C) 0.5 Counts/C block and the secondary current of their built-in current transformer Zero-Current Reading (within 2 sec.) 0.00 Amps L1 to calculate and then display VOLTS, AMPS, WATTS, power factor Zero-Power Reading (within 2 sec.) 0 Watts (PF), or line frequency on -F HERTZ models. UL/IEC61010-1 Measurement category II While the ACM20 displays the rms value of line voltage and line Supply Voltage (TB1) (Measurement Category II) current, the VOLTS reading has an upper limit of 140Hz (-3db point), which means rectangular-shaped voltage waveforms, and waveforms All Models 47-63 Hz 85 120 264 Vac with sharp transitions, will read lower than their true-rms value. For Supply Current example, a square wave line voltage will read approximately 1-2% All Models 35 50 110 mA lower, a triangle wave will read 3% lower, and a modi ed sine wave Power Supply Terminal Block will read 18% lower. The oscillograms on page seven illustrate typical ACM20 VOLTS readings when powered from four ac waveforms. Wire Size 16-22AWG, solid or stranded Insulation Strip Length 6.4mm (0.250 in) The 140Hz bandwidth limit does not apply to the WATTS reading nor to the AMPS reading. The circuitry used for these two measurements Screw Tightening Torque 0.4Nm (3.6 lb-in) has an upper bandwidth of 14kHz. ACM20 power meters are mains Rated Voltage 300Vac operated devices designed to measure ac currents and voltages, Display within the speci ed limits previously noted. DC currents and voltages Display Type and Size 4 Digit LED, 9.14mm (0.36in) high will not be measured accurately. Overrange Indication Flashing 9999 Watts 2. Basic Operation: Upon application of ac power to TB1, the unit will Decimal Point Selection Automatically Set rst perform a self-test routine and then continuously display ac volts with the VOLTS LED annunciator illuminated. The display will remain Physical/Environmental in the VOLTS mode as long as the front panel SEL button is not Operating Temperature 0 +60 C touched. Storage Temperature 40 +75 C After the unit powers up to normal operation in the VOLTS reading Humidity (non-condensing) 0 85 % mode, momentarily (approximately one second) touching the SEL Dimensions See mechanical speci cations button on the units front panel three times in succession will cycle Weight: 32A models 1.3oz (37.9g) the display to AMPS, WATTS, and end at PF (or HERTZ for F mod- Weight: 100A models 1.5oz (43.5g) els). Momentarily touching SEL a fourth time will return the display Hex Nut Tightening Torque 0.14 N-m (20 ozf-in) back to the VOLTS reading mode. Speci ed full-scale currents are those passing through the power meters built-in current Holding the SEL button down for 3 seconds will place the unit in a transformers primary load-circuit. continuous auto-cycling mode, and the display will repetitively scroll The 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 through all four measurements, with each measurement remaining the rated current. displayed for 3 seconds. ACM20 Power Meters are calibrated with near full-scale 60Hz sine-wave inputs. All speci ed maximum supply currents are steady state larger surge currents can occur at initial application of line power. Applies to 10A and 32A models only. www.murata-ps.com/support MPM ACM20 Series.C01 Page 2 of 6