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7-5 Measuring Resistance
7-5-1 Connect the black test lead to "COM" jack and the red to "VΩmA" jack.
7-5-2 Set the rotary switch at the desired "Ω" range position.
7-5-3 Connect test leads across the resistance under measurement.
7-5-4 You can get reading from LCD.
NOTE:
1.
When only the figure'1' or '-1' is displayed, it indicates over-range situation and the higher range has to be selected.
2.
For measuring resistance above 1MΩ, the mete may take a few seconds to get stable reading.
3.
When the input is not connected, i.e. at open circuit, the figure '1' will be displayed for the over-range condition.
4.
When checking in-circuit resistance, be sure the circuit under test has all power removed and that all capacitors have been
discharged fully.
5.
the value scale to be measured is unknown beforehand, set the range selector at the highest position.
7-6 Diode Testing
7-6-1 Connect the black test lead to "COM" jack and the red to "VΩmA "jack. (the polarity of red lead is '+')
7-6-2 Set the rotary switch at the "
7-6-3 Connect the red lead to the anode and the black lead to the cathode of the diode under testing.
7-6-4 You can get a reading from LCD.
NOTE:
1. The meter will show approximate forward voltage drop of the diode.
2. If the lead connections are reversed, only '1' will be displayed.
7-7 Continuity Testing
7-7-1 Connect the black test lead to "COM" jack and the red to "VΩmA" jack.
7-7-2 Set the rotary switch at the "
7-7-3 Connect test leads across two points of the circuit under testing.
7-7-4 If continuity exists (i.e. resistance less than about 70Ω±30Ω), built-in buzzer will sound.
7-8 Square wave output
7-8-1 Connect the black test lead to "COM" jack and the red to "VΩmA" jack.
7-8-2 Set the rotary switch at the desired "
7-8-3 The meter output square wave: Frequency=50Hz±10Hz，Vp-p=3V±1V, output Impedance≈560KΩ
（The LCD display is insignificance）
8. Maintenance
8-1 Before attempting to remove the battery door or open the case, be sure that test leads have been disconnected from measurement
circuit top avoid electric shock hazard.
8-2 To avoid electrical shock, remove test leads from measurement circuits before replacing the fuse. For protection against fire,
replace fuses only with specified ratings: F-200mA/250V fuse.
8-3 You must replace the test leads if the lead is exposed, and should adopt the leads with the same specifications as origin.
8-4 Use only moist fabric or small amount of detergent but not chemical solution for cleaning.
8-5 do not use the meter before the back cover is properly closed and screw secured. Upon any abnormality, stop operation
immediately and send the meter for maintenance.
" range position.
" range position.
" range position.
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