Input type |
AC, 4-lead differential, resistance |
Number of inputs |
1 |
Maximum channels |
16 (with optional scanner) |
Resistance ranges |
22 ranges from 2 mΩ to 63.2 MΩ (excitation dependent) |
Maximum update rate |
10 rdg/s (single range and input) |
Range change settling |
3 s + filter settling |
Channel change (scan) settling |
3 s + filter settling |
Resolution |
Sensor and range dependent, refer to Measurement Input Specifications table |
Accuracy |
Sensor and range dependent, refer to Measurement Input Specifications table |
Temperature coefficient |
±0.0015%/°C of rdg |
Maximum lead resistance |
100 Ω + 10% of resistance range per lead for current ≤3.16 mA; 10 Ω + 10% of resistance range per lead for current ≥10 mA |
Isolation |
Isolated from chassis and heater grounds |
Lead connections |
V+, V-, I+, I-, V shield, I shield, individual guards |
Scanner lead connections |
V+, V-, I+, I-, for each sensor, shield common to all |
Common mode rejection |
Matched impedance voltage input and current output, active CMR |
Excitation |
Sinusoidal AC current source |
Excitation frequency |
9.8 Hz, 11.6 Hz, 13.7 Hz (default), 16.2 Hz, or 18.2 Hz |
Excitation currents |
22 ranges from 1 pA to 31.6 mA RMS |
Excitation accuracy |
±2% of nominal |
Minimum excitation power |
10-18 W into 100 kΩ (see Measurement Input Specifications table for other ranges) |
Typical DC bias current |
2 pA +1% of excitation current (4.0 × 10-19 W into 100 kΩ) |
Maximum DC bias current |
4 pA +1% of excitation current (1.6 × 10-18 W into 100 kΩ) |
Power up current protection |
Current output shunted on power up |
Voltage input ranges |
12 ranges from 2 µV to 632 mV RMS |
Voltage input over-range |
20% |
Voltage input impedance |
>5 × 1013 Ω |
Maximum input voltage noise |
10 nV/√Hz at 10 Hz |
Range selection modes |
Manual, voltage excitation, current excitation, autorange |
Scanner modes |
Manual or autoscan |
Filter |
1 s to 200 s settling time, 1% to 80% filter window |
Additional software features |
Min/Max reading capture, pause (3 s to 60 s) on range and/or channel change, scanner dwell time (1 s to 200 s) |
Supported sensors |
NTC resistive sensors including germanium, Cernox®, Rox™, PTC resistive sensors including rhodium-iron |
Quadrature display |
Real and imaginary |
Connectors |
6-pin DIN (current out), 6-pin DIN (voltage in), and D6-pin DIN (current out), 6-pin DIN (voltage in), and DA-15 (scanner control) |
Supported scanners |
Lake Shore 3726 and 3708 |