Sealey MM404 Instructions

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.
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
3 When using this meter, please observe all normal safety rules concerning:
Protection against the dangers of electric 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 value scale to be measured is unknown, 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 When not in use, store the multimeter carefully in a safe, dry, childproof location.
Storage temperature range - 10
2. FEATURES
Durable composite case with integral AC current test clamp, suitable for the toughest
workshop conditions. Four digit, large and clear, 12mm LCD display. Features
push-button data hold and five function, eight range, rotary selection switch.
Supplied with probe test leads, wrist strap and carry case.
Layout: (Fig.1.)
1. Jaws 4. Rotary Function Switch
2. Trigger 5. Display
3. Data Hold 6. EXT Input
AC Voltage
DC Voltage
AC Current
Resistance
Audible Continuity
Insulation Test
3. OPERATION
WARNING! Ensure that you read, understand and apply the safety and operational instructions before connecting the multimeter. Only
p
when you are sure that you understand the procedures is it safe to proceed with testing.
Operating temperature range 0
Relative humidity:
3.1. Rotary Function Switch.
3.1.1. Rotate this switch to select the desired function ranges for AC/DC voltage, AC current, resistance, audible continuity and insulation tester.
3.2. Data-hold Button.
3.2.1. Press this button to hold the last reading in the display. The display will remain held until you either press the data-hold button again or
switch the meter off.
3.3. Measuring AC Current.
3.3.1. Set the rotary function switch to the 1000A position.
3.3.2. Press the trigger to open the transformer jaws and clamp over one conductor only.
Note: It is not possible to take a reading from more than one conductor at a time.
3.3.3. Keep the conductor as close to the centre of the jaws as possible to improve the accuracy.
3.3.4. If the reading is less than 200A turn the rotary switch to the 200ACA position to improve the accuracy.
3.4. Measuring Voltage
3.4.1. Connect the black test lead to the COM input socket and the red test lead to the V/Ω input socket.
3.4.2. Set the rotary switch to the required V
C to 50 C.
O O
1 - 750V
1 - 1000V
0.1A - 1000A
100mΩ - 20KΩ
50 ± 25Ω with audible tone
100KΩ - 2000MΩ (with optional insulation test unit)
C to 40 C.
O O
Maximum 80%.
(dc) or V ~ (ac) range and connect test leads across the source or load under measurement.
INSTRUCTIONS FOR:
DIGITAL CLAMP METER
MODEL: MM404.
7. COM input
8. VΩ Input
9. Wrist Strap
Fig.1
MM404 - 1 - 070105