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
