User Manual

AUTO RANGE、SCAN FUNCTION
DIGITAL DISPLAY MULTIMETER
OPERATION MANUAL
This LCD Auto Range、
scan function
& Auto Power off Digital
multimeter is a portable multimeter. It is ideally suited for field,
laboratory, shop and home applications.
1. SAFETY INFORMATION
The following safety information must be observed to insure
maximum personal safety during the operation at this meter.
1) When measuring voltage ensure that instrument is not
switched to the current range, resistance range, diode and
continuity range, capacitance range.
2) Use extreme care when measuring voltage above 50V.
Especially, from sources where high energy is existed.
3) Avoid making connections to "live" circuits whenever possible.
4) Before making resistance measurements, diode or continuity
test, capacitance test, ensure that the circuit under test
side-energized.
5) Always ensure that the correct function and range is selected.
6) Extreme care should be taken when using the instrument to
conjunction with a current transformer connected to the terminals
if an open circuit occurs.
7) Ensure that the test leads and probes are in good condition
with no damage to the insulation.
8) Take care not to exceed the over-load limits as given in the
specifications.
9) Before opening the cover of the battery cabinet to replace
batteries. Disconnect the test leads from any external circuit, set
the selector switch to “OFF" position.
10) Keep the fingers after the protection ring when
measuring through the instrument lead.
11) Change the battery when the symbol appears to avoid
incorrect data.
2. Panel Layout
1）LCD Display：LCD Display, facilitates reads the data.
2）SELECT key：：Push the key to select SACN→AUTO ACV
→AUTO DCV→MANU EF on voltage test range, and to select
AUTO AC or AUTO DC mode on ACmA test range. Push the key
to select SACN→AUTO Ω→MANU →MANU →AUTO Cap
on ”ΩCAP ” test range.,
3）Rotary Switch: use this switch to select functions and ranges
4）Test line
5) “EF” test prompt
2. SPECIFICATIONS
2.1 GENERAL SPECIFICATIONS
Display: reading of 2999.
Range control: Auto range and
scan function
.
Polarity: Automatic negative polarity indication.
Zero adjustment: Automatic.
Over range indication: "OL" display. (Except 30mA)
Low battery: The " " is display when the battery voltage is below 2.4V.
Auto Power Off: 10 minutes after stopping the switch or no push
button, the meter automatically enter to power off mode. Push
button or run switch, auto power off disable.
Safety Standards: The meter is up to the standards of IEC1010
Double Insulation, Pollution
Degree 2, Over voltage Category Ⅲ.
Operating Environment: Temperature 32～104°F(0～40℃),
humidity＜80%RH.
Storage Environment: Temperature -4～140°F(-20～60
℃),humidity＜90%RH.
Power supply: LR-44 1.5V
Dimension: 108(H)×54(W)×12(D)mm
Weight: Approx. 110g (including batteries).
2.2 ELECTRICAL SPECIFICATIONS
Accuracies are ± (% of reading + number in last digit)
at 23±5℃,≤75%RH.
2.2.1 DC Voltage
Range Accuracy Resolution
3V
1.0% of rdg+7digits
1mV
30V 10mV
300V 100mV
500V 1.5% of rdg+7 digits 1V
Overload protection: 500V DC/500Vrms AC
Impedance: 10MΩ.
2.2.2 AC Voltage
Range Accuracy
Resolution
Frequency
3V
1.0% of rdg+10digits
1mV
50
～
400Hz
30V 10mV
300V 100mV
500V 2.5% of rdg+15digits 1V
Average sensing, calibrated to rms of sine wave
Overload protection: 500V DC/500Vrms AC
Impedance: 10MΩ.
2.2.3 Resistance
Range Accuracy Resolution
300Ω 1.8% of rdg+18 digits 0.1Ω
3kΩ
1.2% of rdg+20 digits
1Ω
30kΩ 10Ω
300kΩ 100Ω
3MΩ 1kΩ
30MΩ 2.5% of rdg+20 digits 10kΩ
Overload protection: 250V DC/250Vrms AC
2.2.4 Diode and Audible continuity test
Range
Description Test condition
Display read approx.
forward voltage
of diode
Forward DC current approx.
1.5mA
Reversed DC voltage
approx. 2.8V
Built-in buzzer sounds
if resistance is less
than 30Ω approx
Open circuit voltage
About. -1.2V
Overload protection: 250V DC/250Vrms AC
2.2.5 Capacitance
Range Accuracy Resolution
3nF 5.0% of rdg+30 digits 1PF
30nF 3.5% of rdg+25 digits 10PF
300nF
2.5% of rdg+25 digits
100PF
3μF 1nF
30μF 10nF
300μF 3.5% of rdg+25 digits 100nF
3mF
5.5% of rdg+30digits
1μF
30mF 10μF
Overload protection: 250V DC/250Vrms AC