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Sealey MM402 Instructions
Sealey MM402 Instructions

Sealey MM402 Instructions

10 function multimeter with temp. probe

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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.
1.
SAFETY INSTRUCTIONS
1.1.
PERSONAL PRECAUTIONS
! When using this multimeter, please observe all normal safety rules concerning:
Protection against the dangers of electronic current.
Protection of the meter against misuse.
! 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.
% DO NOT use leads if damaged or if the wire is bared in any way.
1.2.
GENERAL SAFETY INSTRUCTIONS
! Familiarise yourself with the application and limitations of the multimeter as well as the potential hazards. IF IN ANY DOUBT CONSULT A QUALIFIED ELECTRICIAN.
! When the meter is linked to a measurement circuit, do not touch unused meter terminals.
! When the value scale to be measured is unknown beforehand, set the range selector to the highest value.
! Before rotating the range selector to change functions, disconnect test leads from the circuit under test.
F WARNING! Never perform resistance measurements on live circuits.
! Always be careful when working with voltages above 60Vdc or 30Vac rms. Keep your fingers behind the probe barriers while measuring.
! Before attempting to insert transistors for testing, ensure that test leads have been disconnected.
! Components should not be connected to the transistor socket, capacitor socket or temperature socket when making voltage measurement with the test leads.
! When not in use, store the multimeter carefully in a safe, dry, childproof location. Storage temperature range -10
2.
FEATURES
! Push button ON-OFF power switch.
! Single 32-position easy-to-use rotary switch for function and range selection.
! High sensitivity 100µV.
! Automatic polarity indication on DC range.
! Automatic over-range indication on DC range.
! All ranges fully protected.
! Diode testing with 1mA fixed current.
! Capacitance measurements 1µF to 20µF.
! Resistance measurements 0.1W to 20MW.
! Transistor hFE test with ib-100µA.
! Temperature measurement with or without K type thermocouple.
Layout:
1. Power Switch.
3. Transistor Socket.
2. LCD Display.
4. Rotary Switch.
3.
OPERATION
F
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
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 ‘V/W’ input socket.
3.1.2.
Set the rotary switch to the required ‘V
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 ‘mA’ input socket for measuring a maximum of 200mA or the ‘10A’ input
socket for measuring a maximum of 20A.
3.2.2.
Set the rotary switch to the required ‘A
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 V/W input socket (the polarity of the red lead is ‘+’).
3.3.2.
Set the rotary switch to the required ‘W’ range and connect the test leads across the resistance under measurement.
3.3.3.
If the resistance being measured exceeds the maximum value of the range selected or the input is not connected, an over-range indication ‘1’ will be displayed.
3.3.4.
When checking in-circuit resistance, ensure that the circuit under test has all power removed and all capacitors have been fully discharged.
3.3.5.
When measuring resistance over 1MW, the meter may take a few seconds to get a stable reading. This is normal for high resistance measurements.
3.3.6.
In the 200MW range the display reading is approx. 1.0 when the test leads are shorted. This figure must be subtracted from measured results. For example,
when measuring a 100MW resistance the display reading would be 101.0 and the corrected result would be 101.0 - 1.0 = 100MW.
3.4.
MEASURING CAPACITANCE
3.4.1.
Set the rotary switch to the required ‘Cx’ range.
3.4.2.
Before inserting capacitor into the capacitor socket, ensure that the capacitor has been fully discharged.
INSTRUCTIONS FOR:
10 FUNCTION MULTIMETER with TEMP. PROBE
MM402
MODEL:
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.
5. Temperature Socket.
6. Input Sockets.
C to 40
C.
O
O
‘ (dc) or ‘V ~ ‘ (ac) range and connect test leads across the source or load under measurement. The polarity
‘ (dc) or ‘A ~’ (ac) range and connect test leads in series with the load under measurement. The polarity of the
7. Capacitor Socket.
C to 50
C.
O
O
MM402 - 1 - 061201

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Summary of Contents for Sealey MM402

  • Page 1 Protection of the meter against misuse. ! 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.
  • Page 2 89/336/EEC EMC Directive For Jack Sealey Ltd. Sole UK importer of Sealey Professional Tools. NOTE: It is our policy to continually improve products and as such we reserve the right to alter data, specifications and component parts without prior notice.