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IM DL350-03EN
Precautions to Be Taken When Using the Modules
• Do not apply input voltage exceeding the maximum input voltage or maximum rated voltage
to ground.
• To prevent the possibility of electric shock, be sure to fasten the module screws. Otherwise,
the electrical and mechanical protection functions will not be activated.
• Avoid continuous connection under an environment in which the surge voltage may occur.
Precautions to Be Taken When Using the Probes
• To measure high voltage with the 720211 (HS100M12), 720250 (HS10M12), or 720254 (4CH
1M16), use the safety probes (700929, 701947, 702902) or 1:1 safety cables (combination
of 701901 and 701954).
• To measure high voltage with the 720268 (HV (AAF, RMS)), use the combination of
measurement lead 758933 and alligator clip 701954 or the combination of 1:1 safety
adapter lead 701904 and alligator clip 701954.
• To measure high voltage with the 720281 (FREQ), use a safety probe (700929, 701947, or
702902).
• With the 720230 (LOGIC), be sure to only use one of the recommended YOKOGAWA logic
probes (700986, 700987, 702911, or 702912).
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.
• Using a stand in an unstable location is extremely dangerous. If you are installing the
instrument using a stand, install in a stable location.
Manual CD
Never play this manual CD, which contains the user’s manuals, in an audio CD player.
Doing so may cause loss of hearing or speaker damage due to the large sounds that may be
produced.
Optional Accessories
Use the accessories specified in this manual. Moreover, use the accessories of this product
only with Yokogawa products that specify them as accessories.
Do not use faulty accessories.
CAUTION
Operating Environment Limitations
This product is a Class A (for industrial environment) 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