SMD METER
USER
’S MANUAL
MODEL: 990B
3. Explanation of Control and Indicators
3.1 Product Illustration
1
3
5
6
7
8
2
4
①
LCD
②
"REL"Push Button
③
"FUNC" Push Button Function Select
④
FUNCTION Switch
⑤
Pin Holder
⑥
Test Pin (Gold plated, 'INPUT' Terminal)
⑦
Test Pin (Gold plated, 'COM' Terminal)
⑧
Battery cover
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Table of Contents
1.Introduction
2.Safety note
3.Explanation of Controls and Indicators
3-1.Product Illustration
3-2.Push Buttons
3-3.LCD display
4.Specification
4-1.General Feature
4-2.Electrical Specification
5.Testing Operation
5-1.Resistance Measurement
5-2.Capacitance Measurement
5-3.Diode Check
5-4.Continuity Check
5-5. Zener/LED Measurement
5-6. Battery Power Measurement
6.Maintenance
6-1.Replacing The Battery
6-2.Cleaning
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3.2.Push Buttons
[1]"FUNC":it is the function select key that
acts trigger.
Use the Push Button as switch of
Resistance/Capacitance/Diode/Continuity
when the FUNCTION Switch turn on
“R/D/C” Range.
The Meter is have not Power Key. When
install the 1.5V(AAA
)×2
Battery,The
Meter immediately Power ON.
[
2]
"REL" Key: Press "REL" Button to
Enter or exit the relative value measu
-ring mode .
Push the key,
the present display value will be
stored in memory, then the new display
value is the difference between input value
and stored data.
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1. Introduction
The Meter is a handheld and battery operated very
convenient small Tool, that is specially used to
measuring SMD(Surface Mounting Device),there
are resistor, Capacitor, Diode, Zener and LED,
Moreover, the Meter have the continuity checking
function And batery power Measurement.
The Meter is designed to meet IEC1010-1 standard
and Stipulation of 2-Pollution Grade.
The Meter conform to the European Union‟s
following Requirement:CE regulation 89/336
(EMC Electromagnetic Compatibility).
The entire outer surface of the Meter case has been
with thermo plastic elastomer, and the two testing
pins has been gold-plated, so that it is reduce pin
contact resistance and prevent to get rusty.
This operating instruction covers information on
safety and caution,so please read relevant
information carefully and observe all the warming
and note strictly
.
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Note: after auto power-OFF is active,
pushing the "REL" key can turn on the Meter
again, and pushing the "FUNC" key can turn
on again when the Meter on the “R/D/C”
Range, But the meter can not auto power off,
want to power off, must be break battery
connenction.
3-3.LCD Display
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2.Safety Note
The following safety notes should be observed
prior to using this Meter and any associated
accessory.Although the Meter do not used to
measuring to exceed Safety Voltage ,but
there are situations where hazardous conditi
-on may be present.
● Inspect the Meter case before using.Do
Not use damaged device.
● Inspect the Pin Holder and Pin gold
-plated state.
● Do not attempt use the Meter as tweezers
to prevent the pin tip from damage.
● Do not used in the environment with
explosive gas,vapor,or dust.
Caution
Never use the Meter on alive circuits .
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NO Indicato Meaning
1
AUTO
Auto Ranging
2
DC
Direct current
3
REL
Relative Testing
4
Diode
Checking Mode
5
Continuity
Checking Mode
6
nuF
Capacitance
Units(nF,uF)
7
MK
Ω
Resistance
Units(
Ω
, K
Ω
,M
Ω
)
8
V
Voltage Units
9
Low
Battery lndicator
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