B&K Precision 310 - Manual - Manual (Page 8)

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PRECAUTIONS
• Always ensure that the circuit to be measured is switched "OFF",
isolated and completely de-energised before connecting the test
Leads.
• If it is probable that the instrument's protection has been
impaired due to electrical, mechanical or environmental damage,
it must not be used. It should be returned to your nearest
distributor or agent for checking and repair.
• To prevent damage to the liquid crystal display, the minimum
storage temperature of -20°C must be observed. It should also
be noted that below 0°C the operation of the LCD will be sluggish
• If the exterior of the instrument requires cleaning, it should be
done with a sponge and a mild solution of detergent and water.
• Other mechanical cleaning agents must not be used.