Tinker & Rasor M-1 User Manual

CORROSION MITIGATION INSTRUMENTATION

2828 FM 758, NEW BRAUNFELS, TX 78130 TEL: [phone]

PRODUCT INSTRUCTIONS

MODEL M/1

WET SPONGE HOLIDAY DETECTOR

Unpacking Checklist

The Model M/1 Holiday Detector Kit includes the following:

(1) Model M/1 Unit (085-155)
(1) Battery, 9v (010-007)
(1) Cable, Ground (026-101)
(1) WaterWetter Solution, 4oz (049-013)
(1) Wand, 16” (177-070)
(1) Wand, 16” w Cable Adapter (177-075)
(1) Sponge Assembly (ships assembled)

The information contained in this document is subject to change without notice and does not
represent a commitment on the part of Tinker & Rasor.

(1) Sponge (055-882)
(1) Holder, Yellow (076-050)
(1) Knob, sponge holder (094-030)
(1) Sponge bracket (014-195)
(1) Canvas tote bag
(1) Screwdriver
(1) Instructions
(1) Warranty/Calibration Document

Any and all reproduction or transmission of any part of this manual, in any form or by any means
and for any purpose other than the personal use by the purchaser is strictly forbidden without the
express written authorization of Tinker & Rasor.

For updates, please visit our website:

http://tinker-rasor.com

© 2019 Tinker and Rasor, Inc.

All rights reserved.

Web: www.tinker-rasor.com E-mail: [e-mail]

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CORROSION MITIGATION INSTRUMENTATION

2828 FM 758, NEW BRAUNFELS, TX 78130 TEL: [phone]

PRODUCT INSTRUCTIONS

The Model M/1 Holiday Detector is a highly sensitive device designed to locate holidays (pin holes,
voids, etc.) in thin film protective coatings of relatively high electrical resistance when such films
are applied to the surface of material of low electrical resistance. In these applications, such as
painted metal surfaces, the Model M/1 Holiday Detector will locate these points very accurately
with an audible and visual signal. This method of inspection of thin film is a non-destructive test
and will not injure the protective coating.

EQUIPMENT

The Model M/1Holiday Detector consists of a portable battery powered electronic instrument, a
wand handle, and sponge assembly (open cell sponge ships compressed, will expand with water),
and ground wire. The instrument is housed in a sturdy plastic case with provision for attachment of
optional (not included) headphones.

The detector is a “non-destructive wet sponge” type holiday detector. The basic electronic design
of the Model M/1 Holiday Detector is that of a very sensitive circuit which is energized by one 9v
battery. When current of 500 or 700 (+/- 10/%) micro-amperes flows in the circuit, an audible and
visual signal is actuated.

The test lead wire used in the ground wire can handle a minimum of 100 milliamps at 100 volts. If
replacement or additional wire is needed, make sure it meets these requirements. Up to 100’ length
of ground wire does not adversely affect the detectors operation, in most cases. If adding additional
ground wire, 14 AWG stranded or equivalent is recommended.

The exploring electrode is open-cell sponge material and is conductive when saturated with a
wetting solution. The sponge electrode is attached to the non-conductive wand handle by means
of the bolt with knob, plastic sponge holder and backing plate.

The wetting solution should consist of potable tap water and a wetting agent. The ratio of one (1)
ounce agent to one (1) gallon tap water is recommended. Tinker & Rasor WATER-WETTER© is

a non-sudsing wetting agent, available in 8 oz. bottles, factory direct or through stocking
distributors.

PRE-ELECTRICAL TEST PROCEDURES

The protective coatings should be dry and free of all contamination prior to electrical holiday testing.
Proper curing and drying time of the protective coating must be established prior to conducting
electrical holiday testing.

Note: Solvents retained in the protective coating film can cause erroneous indications (false
holidays) during electrical testing.

The dry film thickness should not exceed 20 mils when electrical holiday testing is done with the
low voltage Model M/1Holiday Detector. Film thickness should be determined with a non­destructive dry film thickness gauge to make sure limits are not exceeded.

Web: www.tinker-rasor.com E-mail: [e-mail]

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