Shaw SDHmini - Temperature; Response Time; Guarantee; Basic Definitions

11.2 Temperature
Typical ambient variaons experienced throughout the world are quite
acceptable but avoid placing the instrument in direct sunlight or near a source of
radiant or convected heat. In countries that experience extremes of temperature,
always carry out the automac calibraon with the instrument at its operang
temperature.
11.3 Response Time
The response me of any water vapour pressure detector will naturally be very
much quicker from dry to wet, than from wet to dry. This is the reason that the
SDHmini is so successful. The sensor is kept in a dry condion when it is not in
use and therefore results are obtained in the quickest possible me.
To check whether a parcular instrument is within specicaon, carry out
the automac calibraon procedure, close the instrument head and note the
reading ten minutes later. If the unit has not dried down to -40 °C aer this ten
minute period, the instrument should be returned to your supplier/authorised
distributor for examinaon.
11.4 Guarantee
All products are guaranteed for two years from the date of purchase, some
exclusions are as follows:
Removing protecve guard from any sensor, subjecng sensor to shock or black
list gases e.g. causc and acidic gases like ammonia and chlorine, tampering with
any internal electronics, subjecng to excessive ow rate, contaminants and
general misuse.
If you suspect a fault which you feel needs to be aended to under guarantee
please contact us for assistance hopefully to help fault nd and eect a remedy
and if this is not successful, to give precise instrucons for the return for
inspecon.
No equipment will be replaced or repaired without having been returned for
inspecon either to ourselves or an authorised distributor.
11.5 Basic Denions
Water Vapour Pressure
The pressure exerted by the water vapour contained in any mixture of gases. The
total pressure exerted by the gas mixture is the sum of the pressures exerted by
its components – including the water vapour. Water Vapour Pressure varies in
direct proporon to the total gas.
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