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CHAPTER 3 - OPERATING INSTRUCTIONS
17
87-900-045-01
(D)
The display will be as shown in fig. 3-11 if the battery
voltage is between 11.2 Vdc and 10.2 Vdc.
B a t t e r y
t e s t
B A T T E R Y
L O W B
Figure 3-11
When this message is displayed, the battery should be
recharged (see paragraph 4.6).
After about 4 seconds, the display will be as shown in
fig. 3-12.
S e n s i t i v i t y t e s t
*
Figure 3-12
This test verifies the sensitivity of HeliTest. To perform
it, an amount of helium must be present inside the
sampling line.
Within 1 minute, the test is finished and fig. 3-13 will
show the display:
S e n s i t i v i t y t e s t
O K
*
Figure 3-13
If the sensitivity test is not satisfactory, the display will
be as shown in figure 3-14.
S e n s i t i v i t y t e s t
F A U L T
*
Figure 3-14
This message is displayed for one minute, then the
HeliTest is automatically switched off. In this case,
repeat the start-up procedure. If the same message
appears, please contact the sales office.
If the result of the sensitivity test is O.K. the display will
be as shown in fig. 3-15.
S e n s o r t e s t
*
Figure 3-15
After 1 minute, the sensor is checked and the display
will be as shown in fig. 3-16 if the sensor is O.K.,
otherwise the display will be as shown in
fig. 3-17.
S e n s o r t e s t
O K
*
Figure 3-16
S e n s o r t e s t
S P R A Y
N I T R O G E N
*
Figure 3-17
This message is displayed until the following action
(see Note) has been taken or the HeliTest is switched
off.
NOTE
- Take HeliTest away from helium sources.
- If available, spray Nitrogen (N2) or Argon (Ar)
on the probe until fig. 3-16 is displayed (within
15 minutes maximum).
- Repeat the self test procedure following
paragraph
3.2.
If the sensor test still shows "SPRAY NITROGEN"
contact the sales office.