Web: www.tinker-rasor.com
E-mail: [email protected]
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CORROSION
MITIGATION
INSTRUMENTATION
P.
O.
B
OX
1667
S
AN
B
ERNARDINO
,
C
A
92402
T
EL
:
(909)
890-0700
F
AX
:
(909)
890-0736
P
RODUCT
I
NSTRUCTIONS
DESCRIPTION
The Model M/2 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/2 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.
OUTPUT VOLTAGES
The M/2 has multiple voltage outputs that can be selected. These outputs have been determined to meet
varying international standards regarding the use of the equipment. The Model M/2 Low Voltage (Wet
Sponge) Holiday Detector is designed to meet or exceed the requirement of the following standards (Partial
List):
NACE RP0188, SP0188, TM0384
ASTM D 5162-A, G6, G62-A
ISO 8289, 14654, 14655, 14656, 15741, 16967, 29601
AUSTRALIA AS 3894-2
JAPAN JIS 6766
EQUIPMENT
The Model M/2Holiday 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/2 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.
