© National Instruments Corp. 11 FP-RTD-122 and cFP-RTD-122
• Operate the [c]FP-RTD-122 only at or below Pollution
Degree2. Po llution Degree 2 means that only nonconductive
pollution occurs in most cases. Occasionally, however, a
temporary conductivity caused by condensation must be
expected.
• Refer to the FieldPoint product label for regulatory
certification under hazardous location standards. If the
FieldPoint product is not certified for operation in hazardous
locations, do not operate it in an explosive atmosphere or
where there may be flammable gases or fumes.
Specifications
These specifications are typical for the range –40 to 70°C unless
otherwise noted. Gain error is calculated as a percentage of input
signal value.

Input Characteristics

Number of channels..........................8
ADC resolution.................................16 bits
Type of ADC.....................................Delta-sigma
Input signal ranges (software selectable by channel)
Temperature................................73 to 1123 K
–200 to 850 °C
–328 to 1562 °F
Resistance...................................0 to 400 Ω or 0 to 4,000 Ω
Temperature accuracy (includes 5% matched,
0.5 Ω lead wires—10 m of 22 AWG copper)
Resolution.........................................0.016 °C
Resistance accuracy
Offset error, 400 Ω range
15 to 35 °C...........................0.03 Ω typ, 0.08 Ω max
–40 to 70 °C.........................0.08 Ω typ, 0.4 Ω max
Error
Measured Value
15 to 35 °C –40 to 70 °C
Typical Maximum Ty pica l Maximum
–200 to 150 °C 0.15 0.30 0.40 1.6
150 to 850 °C 0.25 0.50 0.90 3.0