Sealey MM404.261 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 insulation tester as well as the potential hazards.
IF IN ANY DOUBT CONSULT A QUALIFIED ELECTRICIAN.
3 When the insulation tester is connected to a circuit, do not touch unused terminals.
3 When the value scale to be measured is unknown, set the range selector to the highest value.
p WARNING! Never perform insulation 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
Suitable for use with MM404 Digital Clamp Multimeter.
This insulation tester unit makes use of a DC-DC converter to 500V DC.
A two range insulation resistance tester (20MΩ and 2000MΩ) . Powered by four type
AA cells, providing up to 30 operating hours, depending on type of battery and
usage. Featuring a rugged design and ease of use.
Range: 20MΩ (±2%), 2000MΩ
Rated Voltage: 500V DC.
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Test Leads (pair).
Low battery indication: Yellow LED lamp lighted.
Operating temperature range: 0
Range Measurement Range
- 19.99MΩ
20MΩ 100KΩ
2000MΩ 10MΩ - 2000MΩ
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3. OPERATION
WARNING! Ensure that you read, understand and apply the safety and operational instructions before connecting the insulation tester. Only
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when you are sure that you understand the procedures is it safe to proceed with testing.
Operating temperature range: 0
Relative humidity: Maximum 80%.
3. Check Internal Battery.
3.1. Set the power switch to ‘ON’.
3.2. Depress the insulation resistance pushbutton switch.
3.3. The 500V ON LED lamp should light, indicating normal operation from the internal batteries.
3.4. If the 500V ON LED fails to light the batteries are exhausted. Remove the rear cover by unscrewing the centrally located case
mounted screw and insert four new batteries observing the correct polarity.
3.5. Repeat the proccess 3.1. to 3.3. and turn the power switch to the OFF position having confirmed the battery condition as good.
4. Insulation Resistance Measurements
4.1. Connect the insulation tester terminals E, L and G to the meter terminals VΩ
4.2. Set the meter switch to the insulation tester function and 2000MΩ
4.3. Connect a test probe to the L terminal and another to the E terminal on the insulation tester.
4.4. Connect one lead to one end of the circuit to be measured and the other lead to the other end.
4.5. Set the power switch to ON and the range to 2000Ω position.
4.6. Press the insulation resistance pushbutton. The 500V LED lampwill light and the resistance value will be displayed on the meter.
4.7. For open circuits or values of resistance over 2000MΩ, the meter will treat the resistance value as infinate and display a ‘1’ only.
4.8. When measuring values of resistance below 10MΩ on the 2000MΩ range, the measurement error will be greater. Set the insulation
tester and the coupled meter to the 20MΩ position, and press the resistance pushbutton again to gain a new reading.
4.9. After completing your measurements return the insulation tester power switch to the OFF position.
(±4%).
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C to 50 C. Relative humidity: Maximum 80%.
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Accuracy
± 2% of reading ± 2 digit
± 4% of reading ± 2 digit for 500MΩ
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For others ± 5% of reading ± 2 digit
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C to 50 C.
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INSTRUCTIONS FOR:
INSULATION TESTER ACCESSORY
MODEL: MM404.261
Fig.1
and below.
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COM and EXT respectively.
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range position.
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C to 50 C.
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MM404.261 - 1 - 070105