Decibel Measurement; Important; Battery And Fuse Replacement - Kopp GMT-12A Manuel D'utilisation

Decibel Measurement

1) Fully seat the test leads in the correct input jacks.
2) Set the function/range switch to any one of the AC voltage
ranges and read the decibel measurement on the bottom
(red) scale of the faceplate. Based on the AC voltage range
you selected, you will need to compute the actual measu-
rement by using the decibel conversion chart located at the
bottom right of the faceplate.

Important:

For absolute decibel measurements, circuit impedance must
be at least 600 ohms. -0- decibels = 1 milliwatt in a 600 ohm
impedance (equivalent to 0.775 volts across 600 ohms).

Battery and Fuse Replacement

1) Remove the screw in the back cover of the meter and care-
fully separate the back cover from the front.
2) Note the polarity of the battery when removing it from its
compartment and replace.
3) Use GB catalog number GF-0306 0.5A/250V replacement
fuses.
4) Carefully replace the back cover and tighten the screw. Do
not overtighten, as this may strip the threads in the meter
housing.
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