PPM–400ST Formaldehyde Meter Operation Manual
6 MAINTENANCE
With the exception of the battery, the PPM–400ST
Formaldehyde Meter has no user-serviceable
components. No attempt should be made to open the
instrument other than to replace the battery: any
evidence of tampering with the instrument will
invalidate the warranty.
If you find that your instrument requires service or
repair, please contact PPM Technology or your local
dealer.
Cleaning the
Instrument
On no account should the PPM–400ST Formaldehyde
Meter
be immersed in liquid. Any liquid entering the
instrument will destroy the sensor and the electronic
circuitry. Never use abrasive or solvent based
cleaning agents as this could damage the instrument.
If the instrument requires cleaning use a damp cloth
only.
Storage
When not in use, your PPM–400ST Formaldehyde
Meter
should be stored in the supplied carrying case
in a clean, dry environment and away from extremes
of temperature. If it is being stored for long periods
the battery should also be removed to avoid leakage.
6.1 Instrument Battery
The instrument requires a 9V PP3 / MN1604 /
6LR61 type alkaline battery. Take care to observe
the correct polarity when inserting a new battery.
Low Battery
Indicator
When the battery voltage becomes too low and needs
replacing the, display will flash
bAt
.
Battery
Replacement
To access the battery, remove the battery
compartment cover at the rear of the instrument.
Please consider the environment when disposing of
old batteries: Make use of your local recycling
facilities.
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