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#1 Posted : 19 August 2009 09:26:00(UTC)
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Posted By Coy Tanger Hi all, can anyone direct me to a supplier of IS calculators. I am after a basic desktop one rather than the scientific type that may attract "magpies". Thanks in advance, Coy Tanger.
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#2 Posted : 19 August 2009 09:37:00(UTC)
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Posted By Ron Hunter In my engineering days, we used to call them slide-rules! I wonder if you can still buy them in the shops...........
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#3 Posted : 19 August 2009 10:07:00(UTC)
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Posted By Brian Horrocks Could you expand more on the situation and type of atmosphere? Zone 0, 1, 2 etc Why not use a photo electric celled powered calculator AND heat seal it, inside a clear polythene bag using a heat sealing machine. No batteries and the ex atmosphere can't get to the calculator. Check the bag before entry for holes etc
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#4 Posted : 19 August 2009 10:13:00(UTC)
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Posted By Ian Gardner Have a look here: http://www.atexequipment..._Held_Instruments_5.html 4th item from the bottom of the page
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#5 Posted : 19 August 2009 10:34:00(UTC)
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Posted By Coy Tanger IS Calculator Update: Its a zone 1 area - chemical manufacturing plant with reactors and pipe work containing flammable solvent. Thanks, Coy Tanger.
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#6 Posted : 19 August 2009 11:07:00(UTC)
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Posted By Adam Worth Can you use the one on your Ex mobile?
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#7 Posted : 20 August 2009 16:17:00(UTC)
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Posted By Coy Tanger All, After some digging about and assessing the risks I have plumped for the photo electric cell driven type of calculator. They contain virtually no energy (less than a digital watch) and offer little or no risk in a zone 2 area. Thanks all, Coy Tanger.
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#8 Posted : 20 August 2009 17:22:00(UTC)
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Posted By D. Hilton All depends on the type of on/off switch provided: Although the majority of battery and photovoltaic calculators are classed as PEP 2 devices any product with a power on-off switch with contacts that directly interrupt battery current is not acceptable for PEP 2 because the switch may cause an ignition-capable arc.
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