NLW-1000

The NLW-1000The NLW-1000 wide-range logarithmic channel combines the functions of logarithmic counting and logarithmic current conversion to provide a continuous indication of reactor power from source level to full power. A remotely located pre-amplifier minimizes EMI and other sources of interference and adjustable discriminator and gain controls allow flexibility in channel calibration with existing detectors. A differentiator circuit provides continuous indication of rate of change of power, and self test functions can sequentially check count rate, current, period and high voltage. Provision is made for permissive operation by computer of all test functions.

 

SPECIFICATIONS
NLW-1000 LOG WIDE-RANGE CHANNEL

INPUT RANGE Counting - 0.1 C/sec to 3x105 C/sec CURRENT 1x10-6 to 1x10-3 A
LINEARITY (LOG CONFORMITY) + 1% OF THE LINEAR Full scale equivalent covering the combined counting and current regions in the temperature range of 20°to 30°C
TEMPERATURE COEFFICIENT± 0.15%/°C maximum over 10° to 55°C
CALIBRATION/TEST2 fixed count rates, 2 fixed currents for calibration, 1 adjustable count rate, 1 adjustable current for trip testing, HV trip test, test modes selected sequentially by front panel control
RESPONSE TIME CONSTANTS
10-4 to 10-3 Amperes<1 msec102 to 103 Counts/sec30 msec
10-5 to 10-4 Amperes<2 msec101 to 102 Counts/sec0.3 sec
10-6 to 10-5 Amperes2.5 msec100 to 101 Counts/sec3 sec
104 to 105 Counts/sec15 msec10-1 to 100 Counts/sec30 sec
103 to 104 Counts/sec20 msec  
OUTPUTS
Remote Meter: 0–10 V full scaleRecorder: 0–1 V full scale
Remote Meter: 0–1 mA full scaleOptional: 4.0–20 mA full scale
Recorder: 0–0.1 V full scaleHigh Voltage: +300 to +800 VDC @2.6W
BISTABLE TRIPS
High voltageAdjustable with
High power level+5 V logic level
Low power leveland two form C
Periodcontacts per trip
POWER REQUIRED117 VAC + 10% 50/60 Hz @ 1.0 A