Shaw SDHmini Bl, Инструкция по эксплуатации

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components – including the water vapour. Water Vapour Pressure varies in direct
proportion to the total gas.
Dewpoint Temperature
The temperature to which the gas must be cooled in order that it should be
saturated with water vapour (i.e. 100% relative humidity). For practical reasons it
is referred to water above 0 °C and ice below 0 °C.
Parts Per Million by Volume
PPM(v) or VPM is the ratio of the water vapour pressure to the total gas pressure.
Parts Per Million by Weight - PPM(w) is the same as VPM, except that the figure
is modified according to the ratio of the molecular weight of water vapour to the
molecular weight of the carrier gas mixture.
Relative Humidity -
The ratio of the actual water vapour pressure in the gas to the
saturation water vapour pressure at the same temperature.
17.0 Problem Guide
25
Fault Explanation Required Action Notes
Unit does not turn on.
Screen remains blank
and back light off.
Battery low level. Connect a battery charger
unit for a minimum of 12
hours charging.
Logging menu does not
work.
Not a logging
version.
Upgrade unit to logging
version if required.
Unit needs AutoCal. Perform AutoCal.
AutoCal failure.
Sensor sensitivity too low.
Repeat AutoCal.
If AutoCal fails,
contact supplier
to replace sensor.
Unit always reads lower
limit.
Sensor cable
broken.
Repair cable.
Unit will not dry down
to lower limit.
Sieve wet. Perform service on unit
using Service Kit.
Service Kit
available from
supplier.
‘O’ ring failure. Perform service on unit
using Service Kit.
Service Kit
available from
supplier.
Battery has short life
between charges.
Battery reaching
end of life.
Return to supplier/
authorised distributor
for battery replacement/
exchange.
Order from
supplier
Keypad damaged Check function of
keypad electrically.
Contact supplier.