Digital Power Meter - SME

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Model SM series are a Potentio meter setting meter relays with dual Hi & Lo setting. The setters are used multi-turns resistive potentiometers as preset buffers which setting able to be read directly in display for switch selection. The input functions of the units are of wide varieties & ranges, including many parameters of industry process and power system as DCV, ACV, DCA, ACA, DC rate, temerature, Frequency, Speed, Load cell as standard products. For wide application, with some external transducers, the series can be extended to a wider field application as watt, var, power factor & etc.

The unit provides four digits display up to 9999 counts with find resolution & the displays are of high rate-super bringhtness LED, 0.56" size.

Dual control outputs compliant Hi & Lo setting of SPDT relay contacts of an on-off control type. The outputs also comply delaying function adjusted 0-30 seconds standardly & longer requirement for 0-60 or 0-120 secs based on specified request. Dead band also an option availably is selectively & alternatively to time delayer.

Special design in meter front of an open-door type, it keeps convenience in presetting & protects setting to avoid undersired misschange in field application.

Digital Power Meter - SME

 

Features
  • Multi-turns Potentiometer setting
  • Dual Hi & Lo setting
  • Wide input parameters & ranges
  • Output with adjustable time delayer
  • 4 digits up to 9999 counts
Model & Ordering

      

      
Specification
  • Accuracy :
    • 0.1% fs + 2 counts for DC related input
    • 0.25% fs + 2 counts for AC related input
    • 0.25% fs + 0.5oC for temperature related input (cjc. error included)
    • 0.25% fs + 1 counts for frequency related input
  • Stability :
    • Temperatue < 100 pm per oC, 5-50oC
    • Long term stability < 0.15% draft per year
  • Input burden :
    • > 1 Megaohms for DC or AC voltage input sensing
    • < 500 mV drop for DC current input
    • < 0.5 VA for AC current sensing
  • Display : 4 digits maximum 9999 counts, 0.56" super rate LED
  • Setting :
    1. Hi & Lo set standard, Hi-Hi set optional
      2.
    2. Hi comparator setting < meter input output relay energied
      3.
    3. Lo comparator setting > meter input output relay energied
      4.
    4. Multi-turns potentiometer for each setting
      5.
    5. Switchable display range for S1, S2 & M (input measured)
      6.
  • Response time :
    • Analog conversion < 1 sec of average integration typically
    • Analog to Digital conversion 2 sample rate per second
  • Input over capability:
    • Voltage maximum for 100V rms or 2 x full input which ever great current input
    • DC version 2 times continuous, 10 times 2 sec., 25 times 0.5 sec.
    • AC version 3 times continuous, 10 times 30 seconds, 25 times 2 seconds
  • Frequency :
    • 40-400 Hz AC related meters
    • Specified range for frequency related meters
  • Control output :
    1. On-off control type
      2.
    2. Relay contact output of spdt type for each setting
      3.
    3. Capacity AC250V / 2A, AC125V / 3A, DC24V / 3A
      4.
    4. Time delayer adjustable 0-30 sec. typically, 0-60, 0-120 sec. for option
      5.
    5. Dead band for option alternatively & availably to time delayer
      6.
    6. Output indication : LED lamp energied in front panel
      7.
  • Comm. mode voltage : 2KV rms 50 / 60 Hz 1 minute
  • Impulse voltage : 4KV 1.2 * 50 us common mode test
  • Operating condition : 0 to 50oC, 20-90% RH non-condensed
  • Storage condition : -10 to 70oC
  • Power supply :
    • Standard AC 110 / 220V 50 / 60HZ +15%, <5VA
    • Option DC 12V / 24V / 48V / 125V, < 6 Watts