Shaw SDHmini, Инструкция по эксплуатации

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11.2 Temperature
Typical ambient variations 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 automatic calibration with the instrument at its operating
temperature.
11.3 Response Time
The response time 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 condition when it is not in
use and therefore results are obtained in the quickest possible time.
To check whether a particular instrument is within specification, carry out
the automatic calibration procedure, close the instrument head and note the
reading ten minutes later. If the unit has not dried down to -40 °C after this ten
minute period, the instrument should be returned to your supplier/authorised
distributor for examination.
11.4 Guarantee
All products are guaranteed for two years from the date of purchase, some
exclusions are as follows:
Removing protective guard from any sensor, subjecting sensor to shock or black
list gases e.g. caustic and acidic gases like ammonia and chlorine, tampering with
any internal electronics, subjecting to excessive flow rate, contaminants and
general misuse.
If you suspect a fault which you feel needs to be attended to under guarantee
please contact us for assistance hopefully to help fault find and effect a remedy
and if this is not successful, to give precise instructions for the return for
inspection.
No equipment will be replaced or repaired without having been returned for
inspection either to ourselves or an authorised distributor.
11.5 Basic Definitions
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 proportion to the total gas.
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