13
4-4 Checking the Battery Level Indicator
Check the remaining battery charge as
follows.
A general guideline for the amount of
remaining charge is indicated to the right.
This indicator is not displayed while the AC adapter is being used.
4-5 Auto-Zero Function (Zero Flowrate Check)
Let the instrument warm up at least 10 minutes after
switching the power ON. After at least ten minutes have
elapsed, press the [A.ZERO] key and confirm that the
flowrate is 0.00 L/min. Make sure there is no air blowing
when pressing the [A.ZERO] key.
Note: To cancel the auto-zero function, hold down the [A.ZERO] key.
4-6 Starting
Measurements
After confirming the items indicated in 4-1 to 4-5, connect the tube between the air
intake port on the low volume pump (or separately sold hose inlet attached to the PM2.5
sampler, if used) and the exhaust port on the FC-L1 flow calibrator. Then start operating
the instrument.
Confirm the flowrate value indicated on the LCD display.
Note: It is also possible to display the accumulated or average flowrate value.
(For instructions on displaying the accumulated and average flowrate, see page 22.)
The sensor used to measure flowrates requires time to stabilize the sensor
output after the power is switched ON. Let the instrument warm up at least 10
minutes after switching the power ON. If not warmed up, it may not display
correct flowrate values.
Values less than 5 L/min are not within the guaranteed precision range.
(The indicated value flashes if below 4 L/min and is shown as 0.00 L/min for
values below 1 L/min.)
<10%
≥
10%
≥
25%
≥
50%
≥
75%
