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Tuesday, January 25, 2022

Dec 13th 2012


 December 13th 2012

11 members attended for a presentation by James Whale of Testo Limited on Measurement Solutions for Refrigerant Engineering.

Chair. Malcolm Lay      Meetings Organiser. Brendan O’Rielly

James began with a brief introduction of Testo who have been manufacturing, their own test meters and instrumentation in Germany for around fifty five years.  Starting in 1957 they grew to the present day to a 200M euro turnover.

Employing 1700 staff world wideas a private company with 27 susiderariesand 70 parners worldwide ith theie UK branch based in Alton Hampshire/

Built in the Black Forest the company was founded at the end of the Second World War in that area to use the expertise of the watch makers who lived there.  Apart from refrigeration measurement they also produce instruments for Flue Gas Analysing; Thermal imaging; Temperature; Pressure; Humidity and Moisture and Air Velocity measurement as well as incorporating Data Loggers; Printers; Leak detectors; Tachometers; Lux meters; CO & CO2 detectors; Fibrescope or those of a medical background, an endoscope and associated carrying cases.  

Starting with 8 to 9% spend on research and development at the beginning, they now spend nearly 20% to keep ahead of their competition.  In the UK Heating, Ventilation and Refrigeration make up 70% of their turnover.  

With Thermal imaging they are the third largest supplier in the UK and have a range from the most basic to high end tuneable versions.

The main impetus for the evening was the differences between digital and analogue gauges, or to me Mini computer screens and Gauges with needles.  Whilst both had their benefits, discussion for a proposed more basic version brought suggestions for the ‘readability’ of the analogue gauges possibly being incorporated into the digital screen.  It was also suggested that the inbuilt sight glass be omitted, removing both a possible leak source and shattering risk.

Whilst the digital manifold can read vacuum quite accurately, a Vacuum Gauge was presented, available from next year which does not need its sensor cleaning, quite a revelation.  With a built in alarm, possibly only visual but James will check to see if this is audible as well, and can whistand up to 50Bar as well as being hooked up to the digital manifold which the top version will allow data logging.  The battery life is in excess of 200hours and gives accurate readings in temperatures between -20 and 60°C  

The need for annual calibration for all instruments was stressed as without it your readings may be inaccurate, but more important may be refuted if trying to prove them.

 James finished with a presentation by presenting physical devices.  The 557 Digital Manifold, which he had discussed earlier with all the benefits for digital gauges.  When launched the 577cost around £1,000 but now less than £500; with cheaper and less complicated versions available.  He also presented the new refrigerant leak detector to be launched next year; this will need a new tip each year, runs on a “D” battery using a heated diode and warranted for 2 years.

 The questions and suggestions were mainly posed by Lee Freeman and Len Fiddler with a reasonable amount of general discussion.  A non-contributory raffle gave Lee and Malik a bottle of wine for Christmas and James was presented one for an entertaining and informative talk.

 Their web site is www.testo.co.uk and their Webshop: www.testolimited.com and e-mail This email address is being protected from spambots. You need JavaScript enabled to view it. for the less ludditish there is a QC code on their latest literature as well as being on Facebook, Twitter, Reddit and similar.

 This was the last speaker for this year but not this season; the next speaker, will be advised to members, See you the second Thursday in January at Chimes in Pimlico at 7 for 7.30, and keep watching the Web Site for the rest of this years’ programme.

 Malcolm Lay   Dec 26th 2012

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