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1. Before putting into operation
Please check that the technical data of the installation match with those of the lube meter, for example connections, pressure,
flow range and medium. Once the meter has been installed, please make sure that
no
air, pressure shocks or particles
can
damage the meter. Please check all connections to leakage. After the installation we recommend to do several transactions
into an approved tank. Should the use of different oil viscosities show discrepancies by the error limit, this can immediately be
corrected at the site. This avoids to remove or exchange the meter. In case of pretested meters can corrections be carried out
by technicians or officials of the National Weights and Measure Laboratory.
2. Details of unit operation
2.1 Battery
The battery is exchangeable in all meters of the OG series while opening the cover on the front of the register. A new
programmation is not necessary as the programmation does not get lost.
Battery type:
Lithium
CR 123A or for approved meter LM OG-A: Lithium CR ½ AA
A battery symbol is warning when battery change is necessary.
2.2 RESET
The display of the batch register memory can be put to ZERO by pushing the RESET button. A reset is not possible
during a batch process. Resetting of the totalizer is only possible through internal programming.
2.3 Interruption of batch process
By releasing the meter trigger, the batch process is interrupted. When pulled again, the batch process will be continued
at the very point where it was interrupted, unless the RESET button has been pushed in the meantime. The display will
remain unchanged during the interruption. If the batch process is interrupted by external source – e. g. failure of a
transfer pump – the procedure is the same.
2.4 Functional control
In normal operation, the register board totalizes flow in the lube meter by sensing reed switch actions, as described
below. The batch display may be reset to zero by momentarily pressing the RESET button on the front panel. This
action will set the batch accumulator to zero and cause the register to enter a selftest mode, as described below. For the
self test, it is necessary that the display is activated with all numerics set to “8” and all other indicators set to “on” for a
period of 0,8 seconds. If flow or reed switch action takes place during the self test period, the resultant pulses are
processed as normal flow accumulations. This accumulation of flow can only be reset by pressing the RESET button, or
by reprogramming the register for a different unit of measure. During the self test period, the meter will compare the
double redundant storage of the correction factor, the unit of measure and direction of rotation. If two or more values do
not correspond, the register will show a series of dashes (- - - -) and will become inoperative.
If flow sensing or reed switch action is present at any time and it is not preceded by a pressing of the RESET button,
the flow accumulations will be added to the value already present in the batch accumulator.
2.5 Totalizer (LM OG-A)
Pressing the TOTAL button will cause the accumulator memory value to be displayed, for as long as the button is being
pressed, but only as long as no volume pulses are coming in (see also calibration or correction factor). The factory
programmed correction factor results from accuracy testing of bare meter with the mounted electronic register:
Example: Quantity dispensed: 4,2 litres, Quantity displayed: 4,0 litres, Correction factor k: 4,2/4,0 = 1,05
Pressing the TOTAL and the RESET button simultaneously in this sequence will cause the programmed correction
factor to be displayed, as long as both buttons are depressed.
As soon as volume signals come in, all keyboard commands will be ignored!
As soon as pulses are totalized, the keypad is out of function!
2.6 LM OG-A: Monitoring of false pulses
During measurement, the microprocessor controls the phase position of both reed switches (30° to 150° phase shift).
Errors caused by incorrect phase sequence:
If more than two (2) phase errors are noted after a RESET, the LCD display is flashing slowly (1 second interval). This
type of error is resettable by depressing the RESET button.
If it is nor possible to stop the flashing, there is another fault and the register has to be exchanged.
The flashing can e. g. also be caused by a short-time reverse flow when starting up the oil dispense system, or by an
insufficiently areated oil pipe (pressure shocks). This can be prevented by installing an appropriate non-return valve.
Errors in stored variables: (i.e. correction factor, unit of measure, direction of rotation)
These errors are indicated by a series of dashes across the display and are not resettable. The register has to be
removed from service.
2.7 Installation procedure LM OG
The meter series LM OG is equipped with a (1/2", 3/4", 1”) BSP female thread on the inlet side. In order to obtain a
leakage free connection from the meter to the hose, the hose end must have an appropriate BSP male thread.
We recommend to proceed as follows before screwing in:
