FMT Swiss AG 23 190, Operating Instructions And Safety Notes, Page: 8 / 32

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Operating instructions - digital oval gear meter and pulse meter
5. Total volume multiplication factor (x10/x100)
6. Type of total volume display (TOTAL/RESET TOTAL)
7. Units for total volume; L=litres; GAL=gallons
8. Flow rate display
9. Display of measuring unit for partial volumes:
QTS=quarters; PTS=pints; L=litres; GAL=gallons;
The display can be adapted to the direction of flow in 90° steps. To do so (refer to fig. 16-1; item 4),
loosen the four screws . Now you can mount the display unit turned by 90°.
CAUTION
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Take care to ensure that the cables from the battery holder kit (refer to fig. 16-1,
item 21) to the board (fig. 16-1, item 17) are not pinched or excessively twisted.
Then, re-insert and tighten the screws (refer to fig. 16-1, item 4).
3.1.2 User controls
There are two push buttons on the meter (RESET and TOTAL), each controlling two main functions
(pressed individually) and various auxiliary sub-functions (pressed simultaneously).
Main functions:
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RESETT button: Resetting the partial volume register and the (resettable) total volume register
RESET TOTAL.
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TOTAL button: Calling up the calibration mode. Pressed together, the two buttons call up the
configuration mode where you select the unit of measurement.
3.1.3 Measuring chamber
The measuring chamber is located in the centre of the meter.
There is a oval gear in the measuring chamber, set in rotation by the flow of liquid. Each revolution will
generate an electrical pulse that is processed by the microprocessor on the control circuit board.
The microprocessor uses a calibration factor (i.e. a ‚weighting‘ assigned to each pulse) to convert the
pulses generated by the gears‘ revolutions into an intelligible value representing the volume of liquid
that has passed through. It is then displayed in the unit pre-set before in the corresponding registers of
the LCD display for partial and total volumes, respectively.
All of our oval gear meters leave the factory with a default calibration factor = 1000 called „FACTORY
K FACTOR“. There is a possibility to calibrate the meter in order to adapt that factor to the physical
properties of different liquids.
There is always a possibility to return to the manufacturer‘s default setting.
3.1.4 Battery compartment
The meter is powered by two 1.5 V standard batteries (N1).
The battery compartment is inside the body. To replace the batteries, you must remove the cover.