MEASURING METHODS BEFORE PROCEEDING MEASUREMENT, READ SAFETY NOTES ON PAGE 3. 1. Ensure the system under test is not live. 2. In proceeding with measurement, if ” ” symbol appears on the display, replace with new batteries. 3. Short the tips of the leads. Adjust the 0 Ω .ADJ control to set the reading of zero.
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AD Instruments _____________________________________________________________________ 7. Checking a speaker: Speakers are general from 2 Ω to 16 Ω , use 20 Ω range or for higher impedance speaker, use 200 Ω or 2k Ω range. 8. Checking a PA system: For example on a PA system, using a 100V configuration Z=V 2 I P=100 2 I P=10000I(10+50+200)=38.46...
AD Instruments _____________________________________________________________________ MAINTENANCE Battery Replacement : When the symbol ” ” appears on the display, replace with new batteries as follows : (1) Disconnect the test leads from the instrument and turn off the power. (2) Use a screwdriver to unscrew the screws on back cover then slide the cover, take out the batteries and replace with new batteries type ”AA”.