NFT-1000

The NFT-1000 fuel temperature monitoring channel converts millivolt signals from thermocouples into a usable current level for monitoring and display. It includes a dual trip unit, a calibrator module to test the channel trip functions as well as provide a fixed calibration point for verifying the correct operation of the unit, and an isolated transmitter module to drive external indicating-recording devices. Pushbuttons on the front panel enable the operator to check the set points where the module will initiate the two independent trip levels. Annunciators, on the front panel, give an indication of module status i.e. calibrate mode, trips actuated. Meters on the front panel provide visual indications of the set points and measured temperature. The NFT-1000 is designed to be physically similar to the other modules in the line of analog instrumentation modules.

SPECIFICATIONS
NFT-1000 FUEL TEMPERATURE MONITORING CHANNEL

INPUT MODULE Range: 4 to 20 mA
Input Thermocouple: Chromel / Alumel
Input temperature: 0 to 500 º/C
Cold Junction Compensation: Internal to transmitter
Open Thermocouple Protection: Automatic full scale
Linearity: ± 2 º/C or better
Accuracy: ± 0.1% of span
Isolation: ≥ 500 MOhms from input thermocouple
Output: 4 to 20 mA
CALIBRATOR MODULE Calibrate input: set by external potentiometer
Accuracy: ± 0.1% of span
Stability: ± 0.05% of span
Temperature stability: ± 0.02% of span º/C
Operating temperature: -10º to 60 º/C
Output – calibrate: 500 º/C
Output – variable: 0 to 1000º/C
ISOLATED TRANSMITTER Input: 4 to 20 mA
Accuracy: ± 0.1% of span
Linearity: ± 0.05% of span
Isolation: ≥ 500 MOhm
Output: 0 to 10 VDC
POWER SUPPLY Input: 115 VAC
Output: ± 12 VDC, 240 mA
Stability: ± .02% Line and Load