protection will be triggered if the voltage measured between the device HI and LO
terminals exceeds ±(42 Vpk ±0.4 V).
Caution
Do not apply voltage to the safety interlock connector inputs. The
interlock connector is designed to accept passive, normally open contact closure
connections only.
To ensure a system containing the PXIe-4137 is safe for operators, components, or conductors,
take the following safety precautions:
•
Ensure proper warnings and signage exists for workers in the area of operation.
•
Provide training to all system operators so that they understand the potential hazards and
how to protect themselves.
•
Inspect connectors, cables, switches, and any test probes for any wear or cracking before
each use.
•
Before touching any of the connections to the high terminal or high sense on the
PXIe-4137, discharge all components connected to the measurement path. Verify with a
DMM before interaction with connections.
As-Found and As-Left Limits
The
as-found limits
are the published specifications for the device. NI uses these limits to
determine whether the device meets the device specifications when it is received for
calibration.
The
as-left limits
are equal to the published NI specifications for the device, less guard bands
for measurement uncertainty, temperature drift, and drift over time. NI uses these limits to
determine whether the device will meet the device specifications over its calibration interval.
Calibration Overview
Calibration includes the steps shown in the following figure:
NI PXIe-4137 Calibration Procedure
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© National Instruments
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