•
For verification procedures, maintain an ambient temperature of 23 °C ± 5 °C. Maintain
an internal device temperature range of T
cal
± 1 °C.
1
•
For adjustment procedures, maintain an ambient temperature of 23 °C ± 1 °C. The
PXIe-4135 internal temperature is greater than the ambient temperature.
Safety Guidelines for System Operation
Caution
Hazardous voltages of up to the maximum voltage of the PXIe-4135 may
appear at the output terminals if the safety interlock terminal is closed. Open the
safety interlock terminal when the output connections are accessible. With the safety
interlock terminal open, the output voltage level/limit is limited to ±40 V DC, and
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-4135 is safe for operators, components, or conductors,
take the following safety precautions:
•
Ensure proper warnings and signage exist 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-4135, 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.
1
T
cal
is the internal device temperature recorded by the PXIe-4135 at the completion of the last self-
calibration. Call the niDCPower Get Self Cal Last Temp VI to query T
cal
from the PXIe-4135.
PXIe-4135 Calibration Procedure
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© National Instruments Corporation
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