Operation & Installation Manual V12-V6 2010-05-31.doc
31/05/2010
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Figure 7-5: Insert new board and finish exchange
Remove the holding plate from the front side of the carrier frame. Use a screw driver
and insert it as indicated on the device itself to release the part.
Remove flat cables that interconnect printed circuit boards on the front side and the flat
cable that connects to the display module
Disassemble printed circuit boards out of the assembly (4). Note: the processor board
and the I/O board are also connected by means of extension pins from one print to the
other: these boards can only be removed as a couple. Replace the failing print with a
spare one.
Reassemble the electronics in the carrier frame, including flat cable and holding plate
in opposite order.
Install the carrier frame with the electronics back in its compartment, take care to
reconnect cabling at the proper connectors and terminals.
Fasten the carrier frame with the 2 M4 screw and reinstall the display unit.
Reconnect signal cables and power cable.
Reinstall the compartment’s screw lid turning it clockwise and tighten the fastener .
Remove warning signs and switch on power supply.
7.5 Battery maintenance
Within the electronics a battery is present. This battery is used only for the internal clock. If a
meter is installed and operating from an external power supply the battery will not be used. If
a meter is shut down or on stock than the battery will power the internal clock. The following
maintenance actions with respect to the battery should be taken.
- After 10 years of service the battery should be replaced
- After 1 year on stock (or powered down) the battery should be replaced
- After 2 years on stock the battery will become empty.
IMPORTANT!
Replacement of battery can only be done using type CR2032
In case of problems with the battery the metrological performance aspects of the ultrasonic
meter is not at risk guaranteed as critical data is stored in flash memory. However in such
case the internal clock will be reset with each power up. A reset of the internal clock has
indicates the battery is out of order and replacement of the battery is required.
