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1.0 Introduction
This manual provides guidance on the installation and operation of the PSM APT 1000 Series of hydrostat-
ic pressure and level transmitters and the RFM family of termination modules and Safety Barriers. The
APT 1000 is a programmable instrument which features an RS485 communication port. Where this com-
munication capability is to be used to set the unit up and / or to read the instruments measured data, a sep-
arate PSM manual MAN 088 APT 1000 Functionality and Communications is also available which covers
this functionality.
2.0 General Information
Safety instructions for APT 1000 & RFM Series Barriers/Termination Enclosures.
To prevent any damage to the device or any injury to the user it is essential that you read the information in
this document and observe applicable national standards and safety requirements.
This document is provided to help facilitate the safe and efficient operation of the instrument.
3.0 Product liability and warranty
All apparatus is carefully examined and tested before leaving the PSM workshop and is sent out in perfect
order and condition. We, therefore, give the following Guarantee which takes the place of any Guarantee
by Statute, common law or otherwise. If within 12 months from date of despatch, any defect or fault is
discovered in any component of our manufacture, due to faulty material or bad workmanship, we undertake
to make good the defect without charge, provided that notice is given to us immediately on the discovery of
the defect and the defective components or parts thereof, are forwarded to us carriage paid for inspection.
This guarantee does not apply to defects caused by ordinary wear and tear, misuse, neglect, or by
circumstances over which we have no control.
Full terms and conditions are available from our website: www.psmmarine.com/about-us
4.0 Normal operation and maintenance
There is no routine schduled maintenance requirement for the APT 1000 or RFM modules. Periodic checks
should be made to ensure all wiring/cable glands are in good condition and terminations secure. Where the
APT 1000 is used in tanks liable to sludge or sedimentation, the sensing diaphragm should be examined at
appropriate intervals to ensure it is free from contaminants which may obstruct true reading of pressure.
If cleaning is required then EXTREME CARE must be taken to avoid damage to the diaphragm. Use a
solvent or water to loosen and flush the deposits and on no account use sharp or hard objects to scrape the
diaphragm. If necessary a soft brush may be used with care.
Damage caused to the diaphragm will result in loss of calibration and likely non-linearity / thermal sensitivity
to the instrument.
5.0 Instrument return
All equipment is carefully examined and tested before leaving the PSM workshop and is sent out in perfect
order and condition.
Should it prove necessary to return any equipment for inspection, please ensure you follow the process:
• Contact PSM for an RVN form and number
• The equipment must be accompanied by an RVN with clear instructions as to the reason for return
and what actions are requested.
• An explanation of the apparent fault together with details of the service conditions are also required.
• Health & Safety requirements mean that we must be fully aware of any potential hazards prior to
working on returns.
Full terms and conditions are available from: www.psmmarine.com/about-us
6.0 EU conformity
This product meets all of the applicable EU Directives and is supplied with an EU Declaration. Copies of
which are available on request.
