Eurotherm Chessell 392
Input types Thermocouples: Types B, C, E, J, K, L, N, R, S, T, Ni-NiMo
Resistance thermometers: 100Pt, 10Cu, 100Ni, 120Ni.
Voltage: 4mV to 5V dc
Current: 250Ω shunt
Contact closure option: One or two sets of eight. Contact closure or logic low = active
Zero offset -20% to +100% of the gain step selected by the recorder - see table A1 for range steps.
Linearisation types Thermocouple, RTD, Square root, 3/2 power, 5/2 power, log10, Custom curve
Linearisation error ± 0.3˚C
Scan rate Each channel scanned every 500 msec.
CJC rejection ratio 25:1
CJC accuracy ± 0.5 ˚C at 25 ˚C reference
Input ranges Selected automatically by the recorder
using the configured high input value as the
Input impedance >20 MΩ
Rejection Common mode: 120 dB at 50/60 Hz
Series mode: 60 dB at 50/60 Hz
Isolation Isolated input boards: Each input to 250 Vac
Non-isolated input boards: Two channels with common negative connection: to 250V ac from ground