3624 ProBrix Plus - Maintenance and Troubleshooting
Operator Manual
ORBISPHERE
8.6 Troubleshooting
8.6.1 Measurement Troubleshooting
Orbisphere analyzers are factory tested before shipment. Provided they have been
handled properly and are correctly installed, they should be trouble-free.
lists all possible troubles caused by poor handling or identifiable installation
conditions.
Table 8-1:
Measurement Troubleshooting
Symptom
Probable Cause
Corrective Action
Expected Result
Message "Out"
Sensor not connected
Check sensor cable
connection (at sensor and
instrument end)
Measurement
should return after
20 seconds
Message "Prg"
(CO
2
)
Purge pressure too low
or wrong purge gas
Restore correct purge
pressure and gas. Push
the small plastic tube
firmly into the purge exit
and check purge flow rate
(over 3 bubbles per
second.) Check voltage in
continuous purge mode.
In continuous
purge mode,
voltage should be
in the range -2.5V
to +4.5V.
If purge flow rate is
too small, or if
voltage remains
above 4.5V, return
sensor to Hach
Ultra
Damaged sensing
element caused by
mishandling during
membrane replacement
For experienced
service personnel only
:
Remove membrane and
support. Check for
broken wires of the
thermal conductivity chip
under microscope
Return sensor to
Hach Ultra
Analytics
System does not
start: No display
or backlight
Improper line voltage
Check 3624 instrument
voltage
Select proper volt-
age (115V or
230V) on power
supply card
Blown fuse
Unplug instrument and
replace blown fuse (at
position F1 on power
supply card: 100 mA for
230V, 250 mA for 115V)
Instrument should
start up. If not, or if
fuse blows again,
return instrument
to Hach Ultra
Analytics
High sample
temperature
Blockage of sample flow
causing heat buildup
from pump
Check outlet of sample
flow for blockage. If a
check valve is in use,
verify proper orientation
Temperature
should decrease
as normal sample
flow resumes
Voltage drift
during
measurement
(CO
2
)
Purge gas pressure too
low
Set 2 bar gauge pressure
or adjust pressure in order
to get over 3 bubbles per
second from exit tube
Measurement will
return to expected
value
Low reading
(CO
2
)
Leak in purge inlet line
Check line for leaks with
soapy water
Expected reading
Summary of Contents for ORBISPHERE 3624
Page 1: ...Operator Manual ORBISPHERE 3624 Revision F 03 10 2008 ...
Page 2: ......
Page 14: ...8 of 96 Manual Overview 3624 ProBrix Plus Operator Manual ORBISPHERE ...
Page 32: ...26 of 96 Installation 3624 ProBrix Plus Operator Manual ORBISPHERE ...
Page 60: ...54 of 96 PC Program Setup 3624 ProBrix Plus Operator Manual ORBISPHERE ...
Page 68: ...62 of 96 Calibrations 3624 ProBrix Plus Operator Manual ORBISPHERE ...
Page 82: ...76 of 96 Accessories and Attachments 3624 ProBrix Plus Operator Manual ORBISPHERE ...
Page 98: ...92 of 96 Glossary 3624 ProBrix Plus Operator Manual ORBISPHERE ...
Page 101: ...3624 ProBrix Plus User Notes 95 of 96 Operator Manual ORBISPHERE User Notes ...
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