1. Set the rotary switch to
Ω
range.
2. Connect the test leads to the circuit or resistor being measured and
read the displayed value.
Diode Test
1. Set the rotary switch to
range.
2. For forward-bias readings on any semiconductor component, place
the red test lead on the component's anode and place the black test
lead on the component's cathode.
3. The meter will show the approx. forward voltage of the diode
Audible Continuity Test
1. Set the rotary switch to
range.
2. Connect the test leads to the resistance in the circuit being
measured.
3. When the test lead to the circuit is below 50
Ω
, a continuous beeping
will indicate it.
KEY FUNCTION
Hold Key
Data Hold mode makes the meter stop updating the display. Enabling
Data Hold function in auto range mode makes the meter switch to
Manual ranging mode, but the full-scale range remains the same. Data
Hold function can be cancelled by changing the measurement mode,
pressing
RANGE
key, or push
HOLD
key again.
To enter and exit the Data Hold mode:
1. Press
HOLD
key (short press). Fixes the display on the current value,
DH
is displayed.
2. A second short press returns the meter to normal mode.
Select Key
1. Switches between dc and ac voltage or current.
2. Disables automatic power-off feature.
BATTERY SAVER
The Meter enters the "sleep mode" and blanks the display if the Meter is
on but not used for 30 minutes.
Press the
HOLD
key or rotate the rotary switch to wake the meter up.
To disable the Sleep mode, hold down the
SELECT
function key while
turning the meter on.
BEEPER INDICATION
When press the function key and if it is valid, a beep will be emitted. The
buzzer will sound five times one minute before auto power off. And a
long sound to show the auto power off. In the continuity measuring
status, if the resistance is smaller than 50
Ω
,the buzzer will sound.
BATTERY & FUSE REPLACEMENT
To replace the Meter's battery:
If the sign "BATT" appears on the LCD display, it indicates that the
battery should be replaced. Remove the screw on the back cover and
open the battery case. Replace the exhausted batteries with two new
1.5V batteries of the same type (SR44).
To replace the Meter's fuse:
Fuse rarely need replacement and blow almost always as a result of
operator
’
s error. Open the case and replace the blown fuse with the
same rating specified: F 500mA /250V
∅
5
×
20.
WARNING!
Before attempting to open the case, always be sure that test leads have
been disconnected from measurement circuits. Close case and tighten
screws completely before using the meter to avoid electrical shock
hazard.
ACCESSORIES
Battery 1.5V
(
SR44) 2
Carrying Case 1
Operating manual 1
WLS040
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