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Model SD series are a true digital setting meter relays with the dual 4 digits Hi & Lo setting. Eight decade setters are devided into 2 setting groups as the presets of input.

The digital comparator performs a very accurate setting within 1 count error maximum & operate stably, independant of draft for all related factors in setting version.

The input functions of the units are of wide varieties & ranges, including many industry process and power system parameters for 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 witha very fine resolution & the displays are of high rate-super bringhtness LED of 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 adjustable 0-30 seconds standardly & longer requirement for 0-60 sec. or 0-120 sec. based on specified request. Special design. Special design in meter front of an open-door type, it keeps convenience in presetting & protects setting & avoid undersired misschange in field application.

Digital Power Meter - SDDA / SDDV

 

Specification
  • Accuracy :
    • Digital setting + 1 counts maximum
    • Analog conversion
    • 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. 4 digital decade setters for each setting
      5.
    5. True digital process comparators
      6.
  • Response time :
    • Analog conversion < 1 sec of average integration typically
    • Digital conversion one 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. Output indication : led lamp energied in front panel
      6.
  • 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
Features
  • True digital setting with high accuracy :
    • Four Hi & Lo setting
    • Wide input parameters & ranges
    • Output with adjustable time delayer
    • 4 digits up to 9999 counts
Model & Ordering