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ZERA MT320 Portable Reference Meter

Portable Reference Meter based on newest technology in power and energy measurement

Açıklama

MT310-1

The MT320 is a portable Reference Meter based on newest technology in power and energy measurement. Various measuring features combined with its easy operation concept provide the greatest possible flexibility for a comprehensive testing of metering installations on site. Its stable housing made of double isolated plastic already reveals the high quality of the system. The MT320 system is distinguished by its exemplary combination of functionality and design. The equipment is offering optimal ergonomics and functionality combined with an excellent menu guided operation via built-in soft-keys and a 6.4” LCD-display.

Features

  • Excellent user-guidance
  • Many configuration possibilities by adding various measuring adapters
  • Unique long-term and temperature stability of the measuring module
  • Current measurement up to 120 A with error compensated Clip-on CTs
  • Internal memory to store measurement results and customer data
  • Windows based data management software MTVis for evaluation of the test results
  • External system control via PC with windows based control software
  • Current measurement up to 10000 A by using a required current sensor
  • No additional error for reactive measurement
  • Accuracy class 0.05

Ürün Özellikleri

MT310-2
  • Testing of electricity meter installations with 2-wire, 3-wire and 4-wire circuits
  • Testing of energy and power registers
  • Power and energy measurement of active, reactive and apparent energy
  • 4 quadrant measurement
  • Frequency-, phase angle- and power factor measurement
  • Harmonic waveform analysis for voltage and current up to the 40th THD
  • Distortion factor measurement
  • Vector diagram display
  • Waveform sampling
  • Rotary field display
  • Determination of the operating burden on instrument transformers for CT and PT
  • Operation without mains power supply possible
  • * Ratio test by simultaneous measurement of both primary and secondary currents in CT connected metering systems
  • * Selective power measurement
  • * External thermal-printer for presentation of the measuring results at customer site
  • * Energy dosage
* optional function, not serially

Teknik Özellikler

GENERAL
Power supply85 … 265 V, 47 … 63 Hz
Power consumption~ 26 VA
Temperature range, operation-10° … + 50° C
Temperature range, storage-15° … + 65° C
Relative humidity (not condensing)max. 95 %
Dimensions (DxWxH)220 x 290 x 80 mm
Weight2.7 kg
  SAFETY
IP class according to DIN EN 60529IP30
Declaration of conformityCE conform
Protection class according to DIN EN 61140II
Overvoltage category voltage measurement 16)CAT III 300 V
Overvoltage category current measurementCAT III 30 V
REFERENCE METER
Measuring modes2WA / 2WR / 2WAP3WA / 3WR / 3WAP / 3WRCA / 3WRCB4WA / 4WAb / 4WR / 4WRb / 4 WAP / 4 WAPb / 4WRC
Fundamental frequency15 … 70 Hz
Bandwidth3000 Hz
Sampling16 bit 504 samples/period
Accuracy class for measuring of power / energy0.05
Angle measurement accuracy 3) 4)< 0.010°[< 0.1°]
Frequency measurement deviation± 0.01 Hz
Voltage Measurement
Voltage measurement100 mV ... 300 V
Voltage range(s)250 V, 5 V
Voltage channels input impedance (@ range)245 kΩ @ 250 V10 MΩ @ 5 V
Voltage measurement accuracy 5)< 0.03 % @ 30V .. 300 V< 0.2 % @ 500 mV .. < 30 V< 1 % @ 100 mV .. < 500 mV
Voltage measurement temperature drift 3)< 5 x 10 E-6 / K
Voltage measurement stability 1)< 50 x 10 E-6
Voltage measurement long term stability 2) 3)< 80 x 10 E-6 / Year
      Current measurement direkt oder [mit MT3430]
Current measurement1 mA ... 12 A[5 mA … 120 A]
Current range(s)10 A, 5 A, 2.5 A, 1 A, 500 mA, 250 mA, 100 mA, 50 mA [100 A, 50 A, 10 A, 5 A, 1 A, 500 mA, 100 mA, 50 mA]
Usage of ranges10 ... 120 %
Current channels input impedance (@ range)~ 40 mΩ @ 50 mA .. 10 A
Current measurement accuracy 5)< 0.03 % @ 10 mA ... 12 A< 0.2 % @ 5 mA ... < 10 mA[< 0.15 % @ 500 mA … 120 A][< 0.3 % @ 100 mA … < 500 mA]
Current measurement temperature drift 4)< 5 x 10 E-6 / K[< 50 x 10 E-6 / K]
Current measurement stability 1)< 70 x 10 E-6[< 150 x 10 E-6]
Current measurement long term stability 2) 4)< 80 x 10 E-6 / Year< 600 x 10 E-6 / Year
Clamp for max. Ø[12 mm]
  Power Measurement direkt oder [mit MT3430]
Power/energy measurement accuracy 3) 5) 6)< 0.05 % @ 10 mA … 12 A[< 0.2 % @ 500 mA … 120 A]
Power/energy measurement temperature drift 3) 4)< 10 x 10 E-6 / K[< 65 x 10 E-6]
Power/energy measurement stability 1)< 100 x 10 E-6[< 200 x 10 E-6]
Power/energy measurement long term stability 2)< 100 x 10 E-6 / Year< 700 x 10 E-6 / Year
 
  • 1: Stability over 1 hour (every minute one measurement with ti = 60 s)
  • 2: Stability over 1 year (every month one measurement over one hour )
  • 3: From 30 V … 300 V
  • 4: From 10 mA … 12 A [ 500 mA … 120 A]
  • 5: Related to the read value at optimum range selection
  • 6: Related of apparent power
  • [ ] ≙ with AC current clamps MT3430
  • 16: Option CAT IV 300 V
Subjects to alteration

Aksesuarlar

OPTIONAL FEATURES
  • Various mains cables for each country
  • Test cable set
  • Quick connecting cable set
  • Photo electric scanning head
  • Pulse converter
  • Error compensated AC current clamps for 120 A measurement
  • AC current clamps for 1000 A measurement
  • Flexible current sensor for 10000 A measurement
  • External thermal printer
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