National Instruments WSN-3226, Calibration Procedure

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6 | ni.com | NI WSN-3226 Calibration Procedure
14. Repeat steps 1 through 13 for each channel on the NI WSN-3226.
Note
The limits in Table 5 are derived using the values in Table 7.
If the Resistance Accuracy verification procedure determines that the NI WSN-3226 is outside
of the limits, refer to
Where to Go for Support for assistance in returning the device to NI.
Re-Verification
Repeat the Verification section to determine the As-Left status of the device.
Accuracy Under Calibration Conditions
The values in the following tables are based on calibrated scaling coefficients, which are stored
in the onboard EEPROM.
The following accuracy table is valid for calibration under the following conditions:
•
Ambient temperature of 23 °C ± 5 °C
• Relative humidity between 10% and 90%
Table 5.
NI WSN-3226 Resistance Test Limits
RTD/Resistance
Range Setting Test Point (
Ω
)
3-Year Ranges
Lower Limit (
Ω
) Upper Limit (
Ω
)
400 Ω /Pt100 100 99.893 100.107
390 389.777 390.223
4 k Ω /Pt1000 1000 999.26 1000.74
4020 4018.35 4021.65
100 k Ω 4020 4011.39 4028.21
100000 99963 100037
Table 6.
NI WSN-3226 Voltage Accuracy
Range Gain (% of Reading) Offset (mV)
10 V 0.04 2.70