L60iF Issue 9 November 2018
13
6.1.3. With the L60iF switched OFF, press and hold the right
(
o
o
)
and left
(
m
)
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. Allow the temperature to stabilise (usually around 40
q
C).
When warm-up is complete, pressing the down
(
p
)
button will first stop the motor, enforce a short settling
time and then a 10 second averaging value for zero flow.
6.1.4. 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, and
then press the right arrow
(
o
)
to start the ten second averaging run.
6.1.5
.
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 stable press the right arrow
(
o
)
to start the ten second averaging run.
6.1.6. This routine will be repeated for 58 and 63 litre per minute, after which the flow calibration procedure
will be complete, the pump will be switched off. The display will then offer the option of a temperature
calibration. In normal circumstances, this should be refused. The L60iF will return to operator mode. See
Section 8 if a temperature calibration is to be carried out.
6.1.7. To check the calibration, start the pump, and adjust the valve for various flows as indicated on the
flowmeter. Allow a settling time (
30 seconds minimum
) after adjusting 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.
6.2. Procedure for flow and temperature calibration (See NOTE on page 13)
Temperature calibration is not necessary as often as standard calibration. It should be carried out about
twice a year, or after the pump has been serviced.
6.2.1. A flow gauge with a maximum flow of 80 to 100 litre/minute is recommended. Also required is a cone
adapter, which temporarily replaces the normal 60mm filter holder.
6.2.2. Connect the flow gauge to the L60iF via the Restriction Valve (see diagram above).
Open the valve to
offer minimum restriction, this is VERY important
.
This test must be started with the Sampler cold, (i.e. not
having been run) and after being in the coolest part of the building overnight or for a couple of hours.