NI 9218 Calibration Procedure
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© National Instruments
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3
Test Equipment
Table 1 lists the equipment recommended for the performance verification and adjustment
procedures. If the recommended equipment is not available, select a substitute using the
requirements listed in Table 1.
Table 1.
Recommended Equipment
Equipment
Recommended
Model
Where Used
Minimum Requirements
Verification
Adjustment
Calibrator
Fluke 5700A
±60 V,
±16 V,
±65 mV
mode
±16 V,
±65 mV
mode
Use a device that can source
voltages as high as ±50 V and
meets the following
specifications:
≤
100 ppm gain error.
≤
3 µV offset error.
<3 µV offset at voltages less
than 60 mV.
<200 mV offset at voltages
less than 15 V.
<1 mV offset at voltages less
than 60 V.
± 20 mA
mode
—
Use a device that can source
currents as high as ±15 mA,
<200 ppm gain error, and
offset error <1 µA.
IEPE ±5 V
mode
IEPE ±5 V
mode
Use a device that can source
1 kHz, 3 Vrms AC sinusoidal
signals with amplitude
uncertainty of 200 ppm
or less.
DMM (x2)
NI 4071
—
±60 V mode
Use a DMM with <40
Ω
of
error at resistances <400 k
Ω
.
Bridge,
±22 mV/V
mode
Bridge,
±22 mV/V
mode
For DMM1, use one DMM
with <50 ppm gain error, and
<50 µV of offset error at
voltages <3.5 V.
For DMM2, use a second
DMM with
<50 ppm gain
error, and <2 µV of offset
error at voltages <50 mV.
