INFICON Extrima Ex-certified Hydrogen Leak Detector User Manual

Page 22

INFICON - Operating Instructions EXTRIMA

Undo ll Save

Sensor condition indicator.
The indicator bar extends in length
when the sensor is detecting reference
gas. The length of the bar shows the
condition of the sensor. The bar will
become shorter if the sensor has lost
some in sensitivity, but is still useful.
The sensitivity is too low when you
can´t carry out the calibration or get a
Low sensitivity warning.

Calibration

Calibration OK

Undo l

l Save

5. If Repeat Calibration is displayed the

measured value deviated more than
10% from the previous calibration
value. Press Re-calibrate to repeat
steps 3 – 5. Otherwise go to step 6.

6. The display will show Calibration

OK if the calibration was successful.
Press Save.

NOTE:

Allow 30 seconds bet-

ween repeated calibrations for
greatest accuracy. This message
will be blinking on the display to
alert the operator.

Calibration may have to to be re-
peated several times, especially
after probe replacement.

NOTE:

If you do not press Save

at this point, the instrument will
revert to the previous value after
one minute.

To discard calibration press

Undo.

NOTE:

The Detector will warn if

sensitivity of sensor is too low to
safely detect a leak equal to the
set leak alarm limit. The warning
can be ignored and calibration
updated.

NOTE:

If desired, the calibration

can be set under the general
password to prevent the opera-
tor from calibrating by mistake.
In this case you will have to
enter the password to start the
calibration routine. Setting pass-
word protection on calibration
is done in the General Settings
menu. Note that you must also
set a password. The instrument
is delivered with no password
set. See ”Change Password” on
p. 29 or 34.