NLI-1000

The NLI-1000 is an intermediate range power channel for accurate logarithmic display of reactor power, detector high voltage and reactor period. An operational amplifier with an active feedback element is used, producing a very stable logarithmic amplifier. The exponential period is derived by using a high gain operational amplifier with passive components chosen to allow accurate differentiation and low noise. Bistable trip circuits provide alarm and scram signals for power, detector high voltage and reactor period. Test and calibration circuits are provided which feed appropriate signals to check the log N amplifier, the bistable trips and the period circuit. Compensation voltage as well as adjustable high voltage power supplies are provided in the module to allow operation with most existing current mode detectors.

SPECIFICATIONS
MODEL NLI-1000 INTERMEDIATE RANGE POWER MONITORING CHANNEL

INPUT RANGE 1 x 10-10 to 1 x 10-3 Amperes
LINEARITY ± 3% of Full Scale
TEMPERATURE ± 0.15% / °C maximum in the range of 10° to 55°C
CALIBRATION/TEST 2 adjustable calibration points; local and remote Level and High Voltage trip test capability
RESPONSE TIME
10-4 to 10-3 Amperes <1 msec 10-8 to 10-7 Amperes 20 msec
10-5 to 10-4 Amperes <2 msec 10-9 to 10-8 Amperes 30 msec
10-6 to 10-5 Amperes 2.5 msec 10-10 to 10-9 Amperes  
10-7 to 10-6 Amperes 15 msec    
BISTABLE TRIPS High Voltage, High Power and Period 3 User Configurable (choose from power level or period, increasing or decreasing) Adjustable latching, with +5 volt Logic Level and two form "C" contacts per trip
OUTPUTS
Front Panel Logarithmic Power (10-5 to 100%). Period (+3 to Ð30 seconds)
High Voltage (0 to 1000 VDC) or Compensation Voltage (0 to Ð150 VDC), selectable
Remote Outputs 0 -10 VDC
(Two for level, 0 - 1 VDC
two for period) 0 - 1 mA (4 to 20 mA option)
High Voltage 300 to 800 VDC @ 2.6 watts
Compensation 0 to Ð150 VDC
POWER REQUIRED 117 VAC ± 10% 50/60 Hz @ 1 Amp
CHANNEL CONTROL Local or Remote
PULSE MODE INHIBIT Inhibit of Level and Period Trips User Selectable

 


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