Modules
32
nVision Operation Manual
To calculate the total uncertainty of the differential temperature measurement (
U
ΔT
) you must combine the uncertainties of the upper and lower RTD100
and RTD sensor element systems (
U
system
).
Calculate
U
system
for the upper and lower RTD100 and RTD sensor element systems:
Calculate the total differential pressure uncertainty:
Differential Temperature Measurement Uncertainties with Tare
To determine the improved Tare function uncertainties it may be necessary to conduct an analysis of the application. A suggested method of analysis is to
Tare the ΔT reading when measuring the isolated temperature at site A. Without resetting the Tare, measure the isolated site B temperature and determine the
error in your ΔT reading. Comparing these results would represent the full range of Δt readings that you would see in your application.
TEMPERATURE (RTD100) MODULE SPECIFICATIONS
Accuracy
0% to 100% of Full Scale . . . . . . . . . ±(0.015% of r 0.02Ω)
Accuracy specifications include all effects of linearity, hysteresis, repeatability, temperature, and stability within the specified operating temperature range
for one year.
Note:
Exposure to environmental extremes of temperature, shock, and/or vibration may warrant a more frequent recertification period.
Ranges, Resolutions, and Units
Range . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 400Ω for use with 100Ω PRT (platinum resistance temperature detectors)
Resolution . . . . . . . . . . . . . . . . . . . . . . . 0.01 on all scales
Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . ºC, K, ºF, R, and Ω
Wiring Types and TCRs
Wiring Types . . . . . . . . . . . . . . . . . . . . . 2-, 3-, or 4-wire
Available TCR Selections: 0.00385, 0.003911, or 0.003926
Connection
RTD Sensor Connector Interface
P/N 3953: RTD Connection Kit (one IP67 terminal block connector) (equivalent to Phoenix Contact Order Number: 1501265,
or Part Number: SACC-M8MS-4CON-M-SW, or Binder P/N: 99-3383-100-04)
Cable Diameter. . . . . . . . . . . . . . . . . . 3.5 to 5.0mm [0.14 to 0.012 in] with smooth, continuous covering adequate for IP67 sealing
Stranded Conductor Cross Section . . . . . . . . 0.14 to 0.5mm
2
[0.0002 to 0.0008 in
2
]
