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Listen for the leak
can be compared with a standard which allows sorting and some coatingthickness measurements. The power supply is from the mains, 110 or 220 V at 50 Hz. It weighs 4.5 kg.
~¢
!iii~¸
Institut Dr F6rster, Grathwohlstrasse 4, 7410 Reutlingen, West Germany P u m p hard
Fig.4 A film badge tells you how bad the overdose was, the pocket monitor tells you when
K. J. Law Engineers of Detroit, USA has introduced a machine for automatic hardness testing of water-pump shafts. The machine incorporates an eddy-current instrument. The test instrument is a Verimet M900-II dual-
at 1 Hz at 0.75 mR h "1 and becomes continuous at 20 mR h l .
attached to a central steel frame. The parts - x-ray tube, electric motor, batteries and controls - can be transported separately (Fig.7). The machine has a capacity of the equivalent of 200 15 s exposures. The batteries can be recharged. The cralwer is designed for pipes over 200 mm wide.
The detector is of the Geiger type and has a uniform response to gamma-rays from 60 keV-1.2 MeV. It is switched off by hanging upside down on a hook. Otherwise it is always on when worn. (Fig.4). ESI Nuclear Ltd, 2 Church Road, Redhill, Surrey RH1 6QA, UK Thermocouple
The crawler crawls at 150 mm s"l for standard laybarge use but a two-speed version is available for cross-country lines. The operator walks alongside and uses a small radioactive source to control it. It can start, stop and go backwards.
sorts t h e m o u t
A thermocouple metal-sorting device, the Tevotest 3205, has been introduced by the German firm Institut Dr F6rster. It is marketed in Great Britain by WeUs-Krautkramer Ltd. It measures the thermo-electric voltage between hot and cold electrodes and gives the value on an analogue scale and digitally (Fig.5). The temperature of the hot electrode is regulated in relation to the cold. The electrodes have replaceable contacts of copper, nickel or whatever gives a suitable thermocouple with the test material. On the most sensitive range the full deflection of the scale is 0.1 mV. The thermoelectric voltage
Mapel, 76 Willoughby Lane, London N17 OSN, UK Fig.6 Pumpshafts can be automatically tested at up to 1 000 an hour Listen f o r t h e leak
channel hardness and alloy tester. It uses a single coil and two test frequencies (high and low) are applied to it. The test frequencies are chosen to give maximum response to variables of interest (Fig.6). The pump shafts are of SAE 1070 material, induction hardened to Rc 60 surface hardness and to 0.76-1.27 mm case depth. Each shaft is tested while sliding through a contactless test coil at 1 000 shafts an hour. Poor shafts are automatically rejected by a signal from the instrument.
NON-DESTRUCTIVE
TESTING
. JUNE
Sonitor, a portable leak detector from Reglomat, can locate ultrasound in the frequency range 3 5 - 3 5 kHz. The received signals are amplified and converted into audible sound as well as a visible meter reading. The instrument has useful application in the detection of leaks and noise in pressure, electrical and mechanical systems and can identify signals at a distance of several feet. Faults occurring in bearings, motors, switchgear and fluid control devices can also be located.
C r a w l t o it
Basic equipment consists of a receiver transducer, meter and loudspeaker, the power being supplied from a standard 9 V battery. Accessories include a headset and fine microphone probes for precise fault location, and a compact carrying case.
Criterion (Engineering), a part of MAPEL, has produced a pipeline crawler constructed in three parts
Hamilton Microtechniques, 63 Malden Hill, New Malden, Surrey KT3 4DS, UK
K. J. Law Engineers Inc, 26341 W Eight Mile Road, Detroit, Michigan 48240, USA
Fig.5 Thermo-electric potential can be used as a metal-sorting parameter
Fig.7 The operator instructs the crawler to go by waving a radioactive sourceat it
1974
133
~¢
!iii~¸
Institut Dr F6rster, Grathwohlstrasse 4, 7410 Reutlingen, West Germany P u m p hard
Fig.4 A film badge tells you how bad the overdose was, the pocket monitor tells you when
K. J. Law Engineers of Detroit, USA has introduced a machine for automatic hardness testing of water-pump shafts. The machine incorporates an eddy-current instrument. The test instrument is a Verimet M900-II dual-
at 1 Hz at 0.75 mR h "1 and becomes continuous at 20 mR h l .
attached to a central steel frame. The parts - x-ray tube, electric motor, batteries and controls - can be transported separately (Fig.7). The machine has a capacity of the equivalent of 200 15 s exposures. The batteries can be recharged. The cralwer is designed for pipes over 200 mm wide.
The detector is of the Geiger type and has a uniform response to gamma-rays from 60 keV-1.2 MeV. It is switched off by hanging upside down on a hook. Otherwise it is always on when worn. (Fig.4). ESI Nuclear Ltd, 2 Church Road, Redhill, Surrey RH1 6QA, UK Thermocouple
The crawler crawls at 150 mm s"l for standard laybarge use but a two-speed version is available for cross-country lines. The operator walks alongside and uses a small radioactive source to control it. It can start, stop and go backwards.
sorts t h e m o u t
A thermocouple metal-sorting device, the Tevotest 3205, has been introduced by the German firm Institut Dr F6rster. It is marketed in Great Britain by WeUs-Krautkramer Ltd. It measures the thermo-electric voltage between hot and cold electrodes and gives the value on an analogue scale and digitally (Fig.5). The temperature of the hot electrode is regulated in relation to the cold. The electrodes have replaceable contacts of copper, nickel or whatever gives a suitable thermocouple with the test material. On the most sensitive range the full deflection of the scale is 0.1 mV. The thermoelectric voltage
Mapel, 76 Willoughby Lane, London N17 OSN, UK Fig.6 Pumpshafts can be automatically tested at up to 1 000 an hour Listen f o r t h e leak
channel hardness and alloy tester. It uses a single coil and two test frequencies (high and low) are applied to it. The test frequencies are chosen to give maximum response to variables of interest (Fig.6). The pump shafts are of SAE 1070 material, induction hardened to Rc 60 surface hardness and to 0.76-1.27 mm case depth. Each shaft is tested while sliding through a contactless test coil at 1 000 shafts an hour. Poor shafts are automatically rejected by a signal from the instrument.
NON-DESTRUCTIVE
TESTING
. JUNE
Sonitor, a portable leak detector from Reglomat, can locate ultrasound in the frequency range 3 5 - 3 5 kHz. The received signals are amplified and converted into audible sound as well as a visible meter reading. The instrument has useful application in the detection of leaks and noise in pressure, electrical and mechanical systems and can identify signals at a distance of several feet. Faults occurring in bearings, motors, switchgear and fluid control devices can also be located.
C r a w l t o it
Basic equipment consists of a receiver transducer, meter and loudspeaker, the power being supplied from a standard 9 V battery. Accessories include a headset and fine microphone probes for precise fault location, and a compact carrying case.
Criterion (Engineering), a part of MAPEL, has produced a pipeline crawler constructed in three parts
Hamilton Microtechniques, 63 Malden Hill, New Malden, Surrey KT3 4DS, UK
K. J. Law Engineers Inc, 26341 W Eight Mile Road, Detroit, Michigan 48240, USA
Fig.5 Thermo-electric potential can be used as a metal-sorting parameter
Fig.7 The operator instructs the crawler to go by waving a radioactive sourceat it
1974
133