L60iF Issue 9 November 2018 14
6.2.3. With the L60iF switched OFF, press and hold the right (o
) and left (
) arrows on the front panel while
switching on the power. This will force the L60iF into Calibration mode. The motor will start in order to warm
it up ready for calibration. A reading of the standard flow gauge must be taken while the pump is still cold
and within 30 seconds of switching on. The value must be recorded for later use. This is designated the
Cold Flow value.
The displayed temperature will rise to about 40qC and stabilize. When the temperature is stable, warming
up is complete. Take another reading of the flow gauge and record it as the Hot Flow value. After this,
pressing the down (
) button will first stop the motor, then enforce a short settling time and finally a 10
second averaging value for zero flow.
6.2.4. At the end of the ten second interval, the pump will be turned on automatically and the user invited to
adjust the flow for 48 l/min using the restriction valve and reading the flowmeter. When the flow is set, press
the right arrow (
) to start the ten second averaging run.
6.2.5. At the end of this ten second interval, the user will be invited to adjust the flow for 53 l/min, again
using the restriction valve and reading the flowmeter. When the flow is set, and then press the right arrow
(
) to start the ten second averaging run.
6.2.6. This routine will be repeated for 58 and 63 litres per minute, after which the flow calibration procedure
will be complete and the pump switched off. The display will then offer the option of a temperature
calibration, which must be accepted. The display will request the Cold Flow and Hot Flow readings to be
entered in turn. When this has been done, temperature calibration is complete.
6.2.7. To check the calibration, start the pump, and adjust the valve for various flows as indicated on the
flowmeter. Allow a short settling time after setting the flow, and then note the L60iF reading for each flow to
verify that the calibration is correct.
Calibration intervals can be every five l/min, or for a more thorough check, every l/min from 45 to 65. Results
should be logged for later comparison. If the results are unacceptable, the calibration procedure should be
repeated.
To check the temperature compensation. Switch the L60iF on from cold and note the flow gauge and
display readings. Check at intervals over an hour as the pump warms up. The two readings may diverge by
up to 1.5 litre/minute at switch on but will rapidly converge as the compensation system takes over. Note the
readings for future comparison. If a greater error develops, the calibration should be repeated.
To Next Page
Loading...