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5.
Follow the on-screen instructions and steps below to check for clogging.
<Example 1> To check for clogging in the needle
(1) Expose the tip of the needle to the atmosphere and press
.
The pump operates for 5 seconds and decides whether there is clogging.
Does not change from “-40.3kPa”
(2) Remove the needle and press
.
The pump operates for 5 seconds and decides again whether there is clogging.
If the value fluctuates and the negative pressure is eliminated, it can be decided that the needle was clogged.
0 to -5kPa is displayed
(3) Replace the needle with a new part.
Refer to the section “Maintenance” (pages 26 to 27 ).
If the negative pressure is not eliminated even after the needle is removed and checked, remove the parts in order of
the membrane filter and check valve, and decide whether there is any clogging.
<Example 2>
When sample cannot be suctioned because of negative pressure and not clogging
(1) Remove the needle from the sample and expose the tip of the needle to the atmosphere.
Then, press
.
The pump operates for 5 seconds and decides whether there is clogging.
If the value fluctuates and the negative pressure is eliminated, it can be decided that
the sample was at a negative pressure.
0 to -5kPa is displayed
• If
is pressed again while checking for clogging, the pump will stop.
• If
is pressed, the clogging check is aborted, and the Function Menu screen opens.
• This function operates with automatic suction regardless of the selected measurement mode (auto/
manual).
