Function
Red Lead Connection
Input Limits
V
V~
A
A
10A
hFE
ºC
2k
Ω
Heavy duty general purpose multimeter with clear and easy to read LCD display. Features data hold function, temperature
probe and diode test facility. Housed in rugged rubber boot with integral stand. Supplied with full set of leads and probes.
p
WARNING!
Ensure that you read, understand and apply the safety and operational instructions before connecting the multimeter. Only when you are sure
that you understand the procedures is it safe to proceed with testing.
Operating temperature range 0
O
C to 40
O
C.
Remember
to turn on multimeter before use and to turn it off when measurement is completed.
NOTE: WHEN THE FIGURE 1 IS DISPLAYED, IT INDICATES AN OVER-RANGE SITUATION AND A HIGHER RANGE NEEDS TO BE SELECTED.
3.1. MEASURING VOLTAGE
3.1.1.
Connect the black test lead to the COM input socket and the red test lead to the ºCV
Ω
mA input socket.
3.1.2.
Set the rotary switch to the required V (dc) or V ~ (ac) range and connect test leads across the source or load under measurement. The polarity
of the red test lead connection will be indicated when measuring dc voltages.
3.2. MEASURING CURRENT
3.2.1.
Connect the black test lead to the COM input socket and the red test lead to the ºCV
Ω
mA input socket for measuring a maximum of 200mA.
For a maximum of 10A connect the red lead to the 10A socket.
3.2.2.
Set the rotary switch to the required A
(dc) or A ~ (ac) range and connect test leads in series with the load under measurement. The polarity of the
red lead connection will be indicated when measuring dc.
3.3. MEASURING RESISTANCE
3.3.1.
Connect the black lead to the COM input socket and the red test lead to the the ºCV
Ω
mA input socket (the polarity of the red lead is +).
3.3.2.
Set the rotary switch to the required
Ω
range and connect the test leads across the resistance under measurement.
3.3.3.
When checking in-circuit resistance, ensure that the circuit under test has all power removed and all capacitors have been fully discharged.
3.3.4.
When measuring resistance over 1M
Ω
, the meter may take a few seconds to get a stable reading. This is normal for high resistance measurements.
3.5. DIODE
TESTING
3.5.1.
Connect the black lead to the COM input socket and the red lead to to the ºCV
Ω
mA input socket (the polarity of the red lead is +).
3.5.2.
Set the rotary switch to the position and connect the red lead to the anode and the black lead to the cathode of the diode under test. The meter
will show the approximate forward voltage of the diode. If the leads are reverse connected, only 1 is displayed.
1.1.
PERSONAL PRECAUTIONS
3
When using this multimeter, please observe all normal safety rules concerning:
Protection against the dangers of electrical current.
Protection of the meter against misuse.
3
Full compliance with safety standards can only be guaranteed if used with the test leads supplied. If necessary, they must be replaced with genuine Sealey
leads with the same electronic ratings. Failure to do so will invalidate the warranty.
7
DO NOT
use leads if damaged or if the wire is bared in any way.
1.2. GENERAL SAFETY INSTRUCTIONS
3
Familiarise yourself with the application and limitations of the multimeter as well as the potential hazards.
IF IN ANY DOUBT CONSULT A QUALIFIED ELECTRICIAN.
3
When the meter is connected to a circuit, do not touch unused meter terminals.
3
When the magnitude of the value to be measured is unknown beforehand, set the range selector to the highest value.
3
Before rotating the range selector to change functions, disconnect test leads from the circuit under test.
p
WARNING!
Never perform resistance measurements on live circuits.
3
Always be careful when working with voltages above 60Vdc or 30Vac rms. Keep your fingers behind the probe barriers while measuring.
3
Before attempting to insert transistors for testing, ensure that test leads have been disconnected.
3
Components should not be connected to the transistor socket, capacitor socket or temperature socket when taking voltage measurements with the test leads.
3
When not in use, store the multimeter carefully in a safe, dry, childproof location. Storage temperature range -10
O
C to 50
O
C.
INSTRUCTIONS FOR:
20 FUNCTION MULTIMETER
WITH THERMOCOUPLE
MODEL:
MM20
Thank you for purchasing a Sealey product. Manufactured to a high standard this product will, if used according to these instructions and properly maintained,
give you years of trouble free performance.
1. SAFETY INSTRUCTIONS
IMPORTANT:
PLEASE READ THESE INSTRUCTIONS CAREFULLY. NOTE THE SAFE OPERATIONAL REQUIREMENTS, WARNINGS & CAUTIONS. USE THE PRODUCT
CORRECTLY AND WITH CARE FOR THE PURPOSE FOR WHICH IT IS INTENDED. FAILURE TO DO SO MAY CAUSE DAMAGE AND/OR PERSONAL INJURY AND WILL
INVALIDATE THE WARRANTY. PLEASE KEEP THESE INSTRUCTIONS SAFE FOR FUTURE USE.
2. FEATURES
3. OPERATION
MM20 - 1 - 221104
Layout:
1. LCD Display.
2. Rotary Switch.
3. Transistor Socket.
4. Input Sockets.
5. Hold Button.
ºCV
Ω
mA
ºCV
Ω
mA
ºCV
Ω
mA
10ADC
N/A
ºCV
Ω
mA
ºCV
Ω
mA
ºCV
Ω
mA
ºCV
Ω
mA
600V dc
600V ac (sine)
200mA dc
10A dc
2k
Ω
2M
Ω
Measures
:
AC and DC Voltage
DC Current
Resistance
Temperature
Diode/Transistor
Verification Mode
1
2
3
4
5
