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IM 720120-01E
• Avoid continuous connection under an environment in which the allowable surge
voltage or greater voltage may occur.
• Be careful not to exceed the maximum input voltage of a module in the following
cases.
• When the probe attenuation is 1:1.
• When the module input coupling is set to AC.
A DC voltage at the same electric potential as the probe input is applied to the
module input.
Precautions to Be Taken When Using the Probes
• To measure high voltage with the 720210 (HS100M12), 720211 (HS100M12),
701250 (HS10M12), 720250 (HS10M12), or 701251 (HS1M16), use the
isolated probes (700929, 701947), passive probes 702902, or 1:1 safety cables
(combination of 701901 and 701954).
• If you are using the 701255 (NONISO_10M12), be sure to fasten the module
screws. Fastening the module screws activates the protection function and the
non-isolation function. It is extremely dangerous if you do not fasten the screws.
In addition, if you are measuring high voltage above 42 V, be sure to use the
passive probe 701940.
• The BNC part of the passive probe 701940 is made of metal. Therefore, use
the probe at 42 V or less for isolated inputs (720210 (HS100M12), 701250
(HS10M12), 701251 (HS1M16)), etc.) for safety reasons. (Do not connect
voltage above 42 V to both the High and Low sides.) For non-isolated inputs
(701255 (NONISO_10M12), etc.), fasten the module screws as described
before.
• If you are measuring high voltages using the 701267 (HV (with RMS), or 720268
(HV (AAF, RMS)), use the measurement leads (combination of 758933 and
701954) or 1:1 safety cables (combination of 701904 and 701954).
• The measurement category of the 701267 (HV (with RMS)) is 400V-CAT II
for the low side and 700V-CAT II for the high side. Use caution because the
overvoltage tolerance differs between the low and high sides.
Measurement Category
The measurement category of this instrument’s signal input terminals varies
depending on the modules that are installed.
Use the instrument within the scope of the measurement category that corresponds
to the module specifications. Do not use the instrument outside the scope of the
measurement category that corresponds to the module specifications.
Install or Use the Instrument in Appropriate Locations
• Do not install or use the instrument outdoors or in locations subject to rain or
water.
• Install the instrument so that you can immediately remove the power cord if an
abnormal or dangerous condition occurs.
CAUTION
Operating Environment Limitations
This product is a Class A (for industrial environments) product. Operation of this
product in a residential area may cause radio interference in which case the user
will be required to correct the interference.
Safety Precautions