APART IMPMET, Instruction Manual

Page: 7 / 12

Instruction manual IMPMET
7
Using the IMPMET
Getting started: Turn the function switch to the OFF position.
Remove the test leads if present and unscrew the bottom battery
cover by removing the four screws. Insert 6 fresh AA alkaline
batteries. Mind the polarity! Put the cover back in place and
tighten the four screws using a light touch. Remove the batteries
and store them in a safe place when the unit is not used for more
than 30 days, or when the batteries are exhausted. When the low
battery symbol appears in the display, the batteries need to be
replaced. Discard exhausted batteries according to your local waste
management regulations.
Performing a measurement and calculating system power in 100
volt speaker lines:
• Make sure the system under test is disconnected from the
power amplifier.
• Connect the test leads to the speaker/speaker line. Set the
function switch to the expected range. Press the test button.
The display will show the measured impedance. When the
symbol “I” appears in the display, the value is out of range.
Switch to a higher range and perform a new measurement.
• The unit can measure impedance up to 2000 ohms. This is
equivalent to 5 watts in 100 volt. The formula for determining
the power in 100 volt systems: P = Z.I² = V²/Z where Z is the
impedance value measured. For 100 volt systems, the power =
(100 x 100) / Z = 10000 / Z