Hsiang Cheng Corp. ® MAF & MVF Series

Digital Panel Meters, Frequency Digital Panel Meters

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Hsiang Cheng, MAF & MVF DMMs
Characteristics:
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  • Accuracy: 0.02% fs + 1 count)
  • Temperature coefficient: < 20 ppm per degree C change
  • Long term draft < < 20 ppm year
  • 4 digits-9999 counts. 5 digits-99999 counts
  • Display 0.56″super rate LED
  • Input resistance < 1 Megohoms
  • Response time Sample rate 1 pf per sec typically
  • Dielectric strength: 2 KV rms
Product Description:
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space The MAF & MVF series are specially designed to solve the complicated ratio problem in PT & CT variables, they directly accept secondary signals from PT s or CTs & scale to a primary reading display. These units are ANSI-IEEE & IEC, VDE compliant, to provide full protection for surge intrusion & unusual overloads.
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Specifications :
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Range:
Accuracy (23 + 3°C): 0.2% fs
Stability : Temperature coefficient < 50 ppm per degree CLong term draft < 0.2% per year
Digits & counts: 3-3/4 digits 3999 counts maximum
Display : 0.56” super rate LED
Ratio Configuration settable : Ratio settable : CT ratio for MAF, PT ratio for MVF
Response time : Sample rate 1 of per sec typically
input burden: 0.25 VA maximum
input Overload: Current input: 3 * rating-continuous, 10 * rating-30 sec, 25 * rating-3secVoltage input: maximum continuous 750 V or 3 * rated which ever great
Current Frequency 48-400 Hz
Dielectric strength: 2.5KV rms / 1 minute, all terminals to reference ground2KV rms / 1 minute, input terminals to power terminals
Surge test: ANSI C37.90.1 / 1989, IEC 255-3 (1989)
Impulse Voltage: Impulse voltage 1.2 x 50 us 4KV
Oscillating wave : 0.5 us-100 KHz 3KV & 1MHz-0.25 ms 2.5KV
Operating condition Operating temperature :-10 to 55°C, 0-99% RH non-condensedStorage: -25 to 70°C, 20-99% RH non-condensed
Auxiliary power AC / DC version: < 3.5 VA, DC option version ±20% < 5 Watts
Applied rules and standards
Measuring & conversion: IEC 688
Dielectric strength: IEC 688
Impulse & Surge test: ANSI C37.90.1/1989IEC 255-3 (1989)
Adaptability-power system: IEC 0110
Measuring reliability: VDE 3540
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pdf_pic Downloads: General Specifications
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