Calibration Of The System; General; Manual Calibration - SKF MicroDosage System Assembly Instructions Manual

6. Operation
6.4

Calibration of the system

See Figures 5 and 7

6.4.1 General

The MDU has a calibration function that is
started automatically and/or executed manu-
ally by the user. The calibration compensates
for influences on the system from the current
application such as lengths of capillary lines,
oil viscosity, temperature, etc. so that lubricant
is always metered with high precision.
Whenever a calibration is started (whether
manually or automatically), the latest calibra-
tion results stored in the MDU are used as ini-
tial values and then replaced with current re-
sults at the end of the calibration cycle.
The calibration results are stored in the MDU
after each calibration and are retained even
after operating voltage is disconnected.
Less than 1 minute is required for calibration
of one outlet. During this time, the LED
(green) assigned to the outlet is lit while the
other outlets are disabled.
Calibration is performed only when the micro-
metering unit is activated by the enable signal,
i.e., when the enable LED (yellow) is lit.

6.4.2 Manual calibration

Manual calibration is activated by switch posi-
tion "E" on the SV rotary switch for the par-
ticular outlet (Fig. 7).
The calibration procedure can by stopped at
any time by switching the rotary switch back
to position "0"; the calibration cycle that has
already been started still continues to comple-
tion. If a calibration cycle has ended and the
rotary switch is still in position "E", another
calibration cycle is started after 5 seconds. The
LED assigned to the outlet turns off during the
pause between calibration cycles.
If the rotary switches for multiple outlets are
in position "E", calibration is performed for the
outlet with the smallest number. Once the
outlet undergoing calibration is stopped, the
calibration procedure starts for the next outlet
with the smallest number.
Page 51
During commissioning, it is recommended that
a manual calibration be performed with up to
3 cycles. This quickly achieves a high level of
accuracy for the volumetric flow under the
conditions of the application.
EN