380366 V1.6 11/04
5
Analog Bargraph Display
The bargraph can indicate up to 10G
Ω
. When the measured value is between 4G
Ω
and
10G
Ω
, the LCD displays "-HI-". When the measured value is higher than 10G
Ω
the LCD
displays "-OL-".
Low Resistance and Audible Continuity Tests
WARNING
Do not run this test unless ACV = 0. Do not use this mode to check diodes.
1. Set the Rotary switch to the audible continuity/resistance position.
2. Connect the red test lead to the HI input terminal; black lead to the LO terminal.
3. Connect the tips of the test leads to both ends of the circuit under test and read the
resistance on the LCD.
4. When the resistance of a circuit is less than approx. 40
Ω
an audible tone will sound.
AC Voltage Tests
1. Set the Rotary switch to the red ACV position.
2. Connect the red test lead to the HI terminal and the black test lead to the LO terminal.
3. Connect the other end of the test leads to the circuit under test.
4. Read the voltage value on the LCD.
Data Hold Function
The Data Hold function freezes the displayed reading. Data Hold works automatically on
Insulation Resistance Measurements (Megohmmeter tests) but, for the other tests, the
user must press the HOLD key to freeze the meter reading. Press HOLD again to exit the
Data Hold mode.
Auto Power OFF Feature
After a 30-minute period of non-use, the meter automatically shuts down. This will
conserve battery life. To wake the meter, press the Backlight button.
Note that the meter is not completely off until the function switch is set to the OFF position.
Always turn the switch to the OFF position when not in use.
Application Note for Large Installations
In large wiring installations where the insulation of outlets is being tested, more than one
insulation resistance measurement may have to be made to take into account parallel
resistances. Divide large systems into subgroups and test subgroups individually. Also, in
large installations, the capacitance of the insulation will be high, thereby taking longer to
charge when being tested. Care must be taken not to finish a measurement until the
insulation capacitance is fully charged (a steady, stable reading is an indication that this is
the case). The charge stored in the insulation after a test will be discharged automatically
when the test button is released. Be careful not to turn the range switch while the test
button is pressed.
