Macnaught ER-M, Operation Manual

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MS574 0210 0007
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5. MAINTENANCE
5.1. GENERAL DIRECTIONS
 Mounting, electrical installation, start-up and maintenance of the instrument may only
be carried out by trained personnel authorized by the operator of the facility. Personnel
must read and understand this Operating Manual before carrying out its instructions.

The ER may only be operated by personnel who are authorized and trained by the
operator of the facility. All instructions in this manual are to be observed.
 Ensure that the measuring system is correctly wired up according to the wiring
diagrams. Protection against accidental contact is no longer assured when the housing
cover is removed or the panel cabinet has been opened (danger from electrical shock).
The housing may only be opened by trained personnel.

Take careful notice of the " Safety rules, instructions and precautionary measures " in
the front of this manual.
The ER does not require special maintenance unless it is used in low-temperature applications or
surroundings with high humidity (above 90% annual mean). It is the users responsibility to take all
precautions to dehumidify the internal atmosphere of the ER in such a way that no condensation will
occur, for example by placing dry silica-gel sachet in the casing just before closing it. Furthermore, it
is required to replace or dry the silica gel periodically as advised by the silica gel supplier.
Battery life-time:
It is influenced by several issues :
 Input frequency: the higher the frequency, the shorter the battery life-time.
 Flowrate calculation: the lower number of pulses (SETUP 26) the shorter the battery life-time.

Display update: fast display update uses significantly more power.
 Low temperatures; the available power will be less due to battery chemistry.
Note: It is strongly advised to use only necessary functions.
Check periodically:
 The condition of the casing, cable glands and front panel.
 The input/output wiring for reliability and aging symptoms.
 The process accuracy. As a result of wear and tear, re-calibration of the flowmeter might be
necessary. Do not forget to re-enter any subsequent K-factor alterations.
 The indication for low-battery.

Clean the casing with soapy-water. Do not use any aggressive solvents as these might damage
the coating.
5.2. REPAIR
This product cannot be repaired by the user and must be replaced with an equivalent certified
product. Repairs should only be carried out by the manufacturer or his authorized agent.