Model 2701 User’s Manual
Basic DMM Operation
3-3
High energy circuit safety precautions
To optimize safety when measuring voltage in high energy distribution circuits, read and
use the directions in the following warning.
WARNING
Dangerous arcs of an explosive nature in a high energy circuit can cause
severe personal injury or death. If the multimeter is connected to a high
energy circuit when set to a current range or low resistance range, the cir-
cuit is virtually shorted. Dangerous arcing can result even when the multi-
meter is set to a voltage range if the minimum voltage spacing is reduced
in the external connections.
As described in the International Electrotechnical Commission (IEC)
Standard IEC 664, the Model 2701 measurement inputs are measurement
Category I and signal lines must not be directly connected to AC mains.
When making measurements in high energy circuits, use test leads that meet the following
requirements:
•
Test leads should be fully insulated.
•
Only use test leads that can be connected to the circuit (e.g., alligator clips, spade
lugs, etc.) for hands-off measurements.
•
Do not use test leads that decrease voltage spacing. These diminish arc protection
and create a hazardous condition.
WARNING
For the front panel inputs, the maximum common-mode voltage (voltage
between INPUT LO and the chassis ground) is 500V peak. For a switching
module, the maximum common mode voltage is 300VDC or 300V RMS
(425V peak) for AC waveforms. Exceeding these values may cause a
breakdown in insulation, creating a shock hazard.
Use the following sequence when testing power circuits:
1.
De-energize the circuit using the regular installed connect-disconnect device, for
example, by removing the device's power cord or by turning off the power switch.
2.
Attach the test leads to the circuit under test. Use appropriate safety rated test leads
for this application. If over 42V, use double insulated test leads or add an additional
insulation barrier for the operator.
3.
Set the multimeter to the proper function and range.
4.
Energize the circuit using the installed connect-disconnect device and make
measurements without disconnecting the multimeter.
5.
De-energize the circuit using the installed connect-disconnect device.
6.
Disconnect the test leads from the circuit under test.
2701-900-01.book Page 3 Wednesday, August 3, 2011 9:43 AM
Summary of Contents for 2701
Page 344: ...12 CommonCommands 2701 900 01 book Page 1 Wednesday August 3 2011 9 43 AM...
Page 366: ...15 SCPIReferenceTables 2701 900 01 book Page 1 Wednesday August 3 2011 9 43 AM...
Page 393: ...A Specifications 2701 900 01 book Page 1 Wednesday August 3 2011 9 43 AM...
Page 399: ...B Model7700ConnectionGuide 2701 900 01 book Page 1 Wednesday August 3 2011 9 43 AM...
Page 410: ...C StatusandErrorMessages 2701 900 01 book Page 1 Wednesday August 3 2011 9 43 AM...
Page 417: ...D SignalProcessing SequenceandDataFlow 2701 900 01 book Page 1 Wednesday August 3 2011 9 43 AM...
Page 430: ...E MeasurementConsiderations 2701 900 01 book Page 1 Wednesday August 3 2011 9 43 AM...
Page 450: ...G KE2700InstrumentDriver Examples 2701 900 01 book Page 1 Wednesday August 3 2011 9 43 AM...
