Table of Contents
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VT25 / VT28
VOLTAGE TESTER
Instruction
Manual
ALWAYS READ THESE INSTRUCTIONS
BEFORE PROCEEDING
Thank you for buying one of our products. For
safety and full understanding of its benefi ts
please read this manual before use. Technical
support is available from 01923 441717 and
support@martindale-electric.co.uk.
CONTENTS
1
1
1
2
3
2
5
5
5
5
5
3
6
6
Elements and LED Indicators
8
8
8
8
9
9
10
10
11
11
11
11
4
13
13
4.2 Calibration
13
13
13
14
5
Warranty
15
Specifi cations
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Summary of Contents for MARTINDALE VT25
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Page 1: Table Of Contents
1.3 Safety Advice Introduction 2.1 Inspection 2.2 Description 2.3 Accessories 2.4 Battery Installation Operation 3.1 Description of VT25/VT28 Elements and LED Indicators 3.2 Auto-power On/Off 3.3 Torch 3.4 Low Battery Check 3.5 Removable Probe Tip Covers 3.6 Operating Duty Ratio 3.7 Proving Check... -
Page 2: Safety Information
MAINS installation. Always check the voltage indicator’s specifi ed limits before use. For further information on measurement categories visit www.martindale-electric.co.uk/measurement_ The voltage tester must only be used in low categories.php. voltage systems of CAT IV up to 600V, of CAT III and CAT II up to 690V, and within the... -
Page 3: Safety Advice
1000V AC/DC to earth on a CAT III or the parts to be tested, the voltage tester may CAT II installation and 600V AC/DC to earth discharge temporarily the interference voltage on a CAT IV installation. It does not mean it to a level below the ELV, but it will be back to can be used to test for a voltage beyond its the original value when the voltage tester is... -
Page 4: Introduction
If there is any damage then consult your distributor immediately. 2.2 Description The VT25 and VT28 are voltage testers used for proving circuits are dead i.e. not hazardous live. They are constructed in accordance with the latest safety standards. -
Page 5: Auto-Power On/Off
The polarity LED’s will illuminate when the probes of the voltage tester together. voltage source is 12V AC rms or DC. On the VT25, check for an audible tone and a Voltage threshold indicators bright RX LED indication. The voltage threshold LED’s... -
Page 6: Operating Duty Ratio
Also check the buzzer sounds during voltages. proving. Table 1. If testing at locations with high background noise levels, always determine whether the Proving unit type VT25/ Voltage buzzer is perceptible before relying solely on VT28 source PD430 PD690 the buzzer indication. -
Page 7: Single Pole Phase Test
If wiring that is live is running in close Do not rely solely on the buzzer as an proximity to the ‘dead’ wiring being tested, indication of continuity. Always check the there can be capacitive or inductive voltage threshold LED indications as the coupling between the two, thereby causing buzzer also sounds to indicate the presence interference (phantom) voltage. -
Page 8: Maintenance
Martindale Electric recommends that it is returned at least once a year to verify physical integrity, electrical specifi cation and insulation integrity. Martindale Electric is pleased to offer you this service. Please contact our Service Department for details. Email: service@martindale-electric.co.uk Tel: 01923 650660 4.3 Cleaning... -
Page 9: Warranty
Maximum working voltage: 690V DC & AC rms Martindale’s warranty obligation is limited, Nominal voltage threshold indications: at Martindale’s option, to refund of the 12, 24, 50, 120, 230, 690V AC/DC Nominal purchase price, free of charge repair, or voltage threshold tolerance:... - Page 10 Speci cation Check out what else you can get from Martindale: VT25/VT28 • Voltage Tester 18th Edition Testers • Accessories • Calibration Equipment • GENERAL Continuity Testers • Power: 2 x 1.5V, AAA alkaline batteries (IEC Electricians’ Kits • LR03, NEDA 24A) Environmental Products •...
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