Orbisphere 3600 series - 1.4.8 Self Diagnostics

3600 Analyzer for O
2
Measurement—Operator’s Manual 25
3600O2.OM.E9903
SELECT UNITS g/l
CHLORIN. SALIN.
Pressing “ENTER” for either one of these possibilities gives you the opportunity
to enter expected salinity or chlorinity in a screen like this:
SALINITY 000.0
MAX 54 g/l
The maximum chlorinity value, 30 grams per liter, is also displayed on its screen.
1.4.7 H
2
Compensation Option (Model 32646.E)
As mentioned in the calibration section (section 1.3.3.5), an option is available to
compensate for the presence of high H
2
levels in samples. If this option (model
32646.E) has been installed on your system, you may highlight “H2
Compensation” under “Modify Options” and press “ENTER” to see this screen:
H2 COMPENSATION
DISABLED ENABLED
“Enabling” this option leads to another menu, where you are asked to enter
expected partial pressure levels of H
2
in the sample:
H2 PRESSURE 0000
(MEAS)mbar ^
(The “(MEAS)” message helps to distinguish this menu from a similar-looking
menu available in the “Calibration Pure Hydrogen” routine.)
Once “H2 Compensation” has been enabled, the oxygen sensor calibration must
then be performed to assure accurate measurements.
1.4.8 Self Diagnostics
This routine is helpful when you suspect a system malfunction, or if you simply
wish to confirm that the system is in good working order.
Press “ENTER” when “Self Diagnostics” is flashing under “Modify Options” to
bring up this screen:
DIAGNOSTIC TOOLS
SENSOR KEYBOARD
The complete list of options includes “Sensor”, “Keyboard”, and “Memory”.
The “Sensor” diagnostics menu, as shown below, displays the current generated at
the sensor, in nanoamperes.
CURRENT
12.34 nA
This is useful when trying to identify a problem with an Orbisphere service
representative either on-site or over the telephone. A table listing the expected
oxygen sensor currents is provided in section 3. Note that the sensor current
should never exceed 35 µA; thus, for two of the listed membranes (models 2952A
and 29552A), you must check the sensor current in air, not in pure oxygen.
The “Keyboard” diagnostics can identify whether the front panel switches are
working properly. You will first see this menu: