TRIGA® Products

NLW-1000

The 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/TEST

2 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 msec	10² to 10³Counts/sec	30 msec
10^-5 to 10^-4 Amperes	<2 msec	10¹ to 10²Counts/sec	0.3 sec
10^-6 to 10^-5 Amperes	2.5 msec	10⁰ to 10¹Counts/sec	3 sec
10⁴ to 10⁵ Counts/sec	15 msec	10^-1 to 10⁰Counts/sec	30 sec
10³ to 10⁴Counts/sec	20 msec

OUTPUTS

Remote Meter: 0–10 V full scale	Recorder: 0–1 V full scale
Remote Meter: 0–1 mA full scale	Optional: 4.0–20 mA full scale
Recorder: 0–0.1 V full scale	High Voltage: +300 to +800 VDC @2.6W

BISTABLE TRIPS

High voltage	Adjustable with
High power level	+5 V logic level
Low power level	and two form C
Period	contacts per trip

POWER REQUIRED

117 VAC + 10% 50/60 Hz @ 1.0 A