COSA Xentaur SF6 Purity Pro - Manual (Page 18)

18
6. TROUBLE SHOOTING
The trouble shootings mentioned below do not cover all problems, however those that occur most
frequently are indicated to help your research for cause and solution.
Symptoms Causes Solutions
Power does not turn ON. No batteries; AC adaptor may
not be connected.
Polarity of the batteries is
wrong.
The POWER key has not been
pressed long enough.
Insert batteries; connect AC
adaptor.
Place batteries in the correct
direction.
Continue to press POWER key
until the buzzer beeps.
Reading is not correct. AIR CAL is not functioning
correctly.
The incorrect “Measuring Gas”
or “Base Gas” has been
selected.
Interference gas is included in
the sample gas.
A sudden pressure change
occurs at GAS IN, GAS OUT, or
REF. OUT.
The pressure at GAS IN, GAS
OUT or REF. OUT is not at
atmospheric pressure.
When the instrument samples
enough fresh air, stop the
pump. Then press the AIR CAL
key.
Select the correct “Measuring
Gas” and “Base Gas.”
The target gas that contains
interference gas cannot be
measured.
Perform AIR CAL again.
Set GAS IN, GAS OUT, and REF.
OUT under the atmospheric
pressure.
After performing AIR CAL, the
reading goes up even though
no gas has been fed.
Molecular attached to the
chamber or tubing inside
begins to detach. The
concentration in the chamber
becomes high.
Let the instrument sample
some fresh air and confirm if it
shows the AIR CAL value.