B&K Precision 308A - Manual - Manual (Page 7)

MEASURING METHODS
Operation caution
Observe all safety precautions when the FUNCTION
switch is set to either the 200M (250,500V) or the
2000M
(1000V) position . Connect the meter test
leads to the circuit under test before operating the
TEST switch . Do not touch the clip ends of the test
leads when the TEST switch is pressed .
Some electrical equipment , especially cables , may
retain an electrical charge when disconnected from
the line . It is good practice to discharge such
equipment with grounding straps , or other suitable
devices , before touching or making connections .
The meter automatically discharge the test circuits
when the spring loaded TEST switch is released .
Important
Remove all power to the circuit under test when
making resistance measurements . If any voltage is
present in the test circuit the red on the meter scale
plate will light .
Immediately disconnect test leads and turn off
power to test circuit .
— Function switch :
The FUNCTION switch is used to select the range ,
or function desired .
— Test switch :
The TEST switch is normally OFF , spring loaded ,
momentary action switch which "turn on" the meter.
the momentary action is a safety feature .
The test voltage generated by the meter is
automatically discharged when the TEST switch is
released .
FEATURES
— 3 1/2 Digit Insulation Tester .
— 68mm(2.677")x34mm(1.33") large LCD display .
— Three Insulation test voltage 250V,500V,1000V .
— External voltage warning indication
— Automatic circuit discharge .
— Test Insulation at rated voltage into a 1 mA load .
— 200 mA continuity short circuit test current .
— AC voltage measurement .
— Fuse protection .
th — Meet IEC 1010 CAT. , BS 16 edition .
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