Laurel-electronics LAUREATE SERIES 2 COUNTER-TIMER-SERIAL INPUT METER Uživatelský manuál stáhnout pdf (Strana 72)

21. SPECIFICATIONS

DISPLAY

Type ................................................6 LED digits, 7-segment, 14.2mm, plus 4 LED indicators

Digit Color ...........................................................................................................Red or green

Display Range......................................................................................... -999999 to +999999

CONVERSION (FREQUENCY INPUT)

Conversion Technique ................................................................................................1/period

Conversion Rate.................................................Gate Time + 30 ms + 2 signal periods (max)

Gate Time ....................................................................................0 to 199.99 sec (selectable)

Time Before Zero Output (Time-Out) ...........................................0 to 199.99 sec (selectable)

Output & Display Update Rate ......................................................... Same as conversion rate

Time Base Accuracy .............................................................................. Calibrated to ±2 ppm

INPUT ISOLATION

CMV from DC to 60 Hz................................................................................Withstand 250Vac

Dielectric strength....................................................... 3.5 kV ac for 5 sec, 2.3 kV ac for 1 min

DUAL CHANNEL SIGNAL CONDITIONER

Accuracy at 25ºC..........................................................................................................±2 ppm

Tempco ........................................................................................................ ±1 ppm/degree C

Long-Term Drift of Crystal ....................................................................................±5 ppm/year

Signal Types............... AC, NPN, PNP transistor outputs, contact closures, magnetic pickups

Max Pulse Rate ................................................1 MHz on Channel A, 250 kHz on Channel B

Channel Isolation............................................Channel A & channel B share common ground

Low Pass Filter...........................................................................250 Hz or 30kHz (selectable)

Hysteresis ............................................................................... 15 mV to 2.2 Vp-p (selectable)

Trigger level...............................................................................±15 mV to ±1.7 V (selectable)

Debounce Circuitry............................................................................. 0, 3, 50 ms (selectable)

PROCESS RECEIVER & TOTALIZER SIGNAL CONDITIONER

Signal Levels.................................................................0-1 mA, 4-20 mA, 0-10 V (selectable)

Accuracy at 25ºC....................................................................................................... ±0.025%

Span Tempco......................................................................................±0.003% of reading /°C

Zero Tempco.....................................................................................±0.003% of full scale /°C

QUADRATURE SIGNAL CONDITIONER

Signal Type .................................................................Differential or single-ended quadrature

Transitions Monitored............................................................................................ x1, x2 or x4

Max Pulse Rate ................................................. 250 kHz at x1, 125 kHz at x2, 62.5 kHz at x4

Differential high threshold voltage ............................................................................. +200 mV

Differential low threshold voltage................................................................................ -200 mV

Single-ended high voltage.....................................................................................2.5V to 10V

Single-ended low voltage ........................................................................................-1V to +1V

Input resistance, typ. ................................................................................................. 17 kOhm

Conversion Technique for Rate...................................................................................1/period

1 2 ... 67 68 69 70 71 72 73 74 75 76 77 78 79 80

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Laurel-electronics LAUREATE SERIES 2 COUNTER-TIMER-SERIAL INPUT METER Uživatelský manuál Strana 72