Resistance and Continuity Measurements
1.
Insert the black test lead into the negative
COM
terminal and the
red test lead into the positive terminal.
2.
Set the function switch to the
•)))
position.
3.
Use the multifunction
MODE
button to select resistance.
4.
Touch the test probe tips across the circuit or component under
test. It is best to disconnect one side of the device under test so
the rest of the circuit will not interfere with the resistance reading.
5.
For Resistance tests, read the resistance on the LCD display.
6.
For Continuity tests, if the resistance is < 100
, a tone will sound.
Diode Measurements
1. Insert the black test lead banana plug into the negative
COM
jack and the red test lead
banana plug into the positive diode jack.
2. Turn the rotary switch to the
•)))
position.
3. Press the
MODE
button until “ “ appears in the display.
4. Touch the test probes to the diode under test. Forward voltage will indicate 0.4V to 0.7V.
Reverse voltage will indicate “
OL
”. Shorted devices will indicate near 0mV and an open
device will indicate “
OL
” in both polarities.
Capacitance Measurements
WARNING:
To avoid electric shock, disconnect power to the unit under test and
discharge all capacitors before taking any capacitance measurements. Remove the
batteries and unplug the line cords.
1. Set the rotary function switch to the cap position.
2. Insert the black test lead banana plug into the negative (COM) jack.
Insert the red test lead banana plug into the positive (V) jack.
3. Touch the test leads to the capacitor to be tested.
4. Read the capacitance value in the display
Frequency or % duty cycle measurements
1.
Set the function switch to the V position.
2.
Insert the black lead banana plug into the negative COM jack and the red test
lead banana plug into the positive V jack.
3.
Select Hz or % duty with the
Hz/%
button.
4.
Touch the test probe tips to the circuit under test.
5.
Read the frequency on the display.
Temperature Measurements
WARNING:
To avoid electric shock, disconnect both test probes from any source of
voltage before making a temperature measurement.
1.
Set the function switch to TEMP.
2.
Insert the Temperature Probe into the negative (COM) and the V jacks, making sure
to observe the correct polarity.
3.
Select
C or
F with the
MODE
button.
4.
Touch the Temperature Probe head to the part whose temperature you wish to
measure. Keep the probe touching the part under test until the reading stabilizes (about 30
seconds).
5.
Read the temperature in the display. The digital reading will indicate the proper
decimal point and value.
WARNING:
To avoid electric shock, be sure the thermocouple has been removed before
changing to another measurement function
Data Hold and Backlight
To freeze the LCD meter reading, press the data hold button. The data hold button is
located on the left side of the meter (top button). While data hold is active, the
HOLD
display icon appears on the LCD. Press the data hold button again to return to normal
operation.
Note: The HOLD feature will activate when the Backlight is turned on. Press the HOLD key again
to exit Hold.
The backlight function illuminates the display and is used when the ambient light to too low
to permit viewing of the displayed readings. Press the (HOLD) button for one second to
turn the backlight on and press the button a second time to turn the backlight off.
Manual Ranging
The meter turns on in the autoranging mode. Press the
Range
button to go to manual
ranging. Each press of the range button will step to the next range as indicated by the units
and decimal point location. Press and hold the
Range
button for two seconds to return to
autoranging. Manual ranging does not function in the AC Current , Diode and Continuity
check functions
Battery Replacement
1. Remove the one rear Phillips head screw
2. Open the battery compartment
3. Replace the Requires one
“9V” battery (NEDA1604, 6F22 006P)
4.
Re-assemble the meter
Red Black Black Red
Probe Probe Probe Probe
Forward test Reverse test
Содержание ZI-9980
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