Hach ORBISPHERE 3654 Manuel D'utilisation De Base page 28

Fill the N purge gas cylinder to a maximum of 200 bar from a master N
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fittings supplied with the analyzer.
Note: Do not refill the analyzer purge gas cylinder if the master N
When the master cylinder is below 100 bar, refill or replace the master cylinder.
8.4.2 CO purge gas
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Gas inhalation hazard. Operate the instrument in a fume hood to prevent exposure to
hazardous gas.
Fill the CO purge gas cylinder to a maximum of 57 bar (liquid phase at 20°C) from a master CO
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storage cylinder equipped with a plunger tube, using the fittings supplied with the analyzer.
Section 9 Troubleshooting
9.1 Troubleshooting - Instrument
If your analyzer is behaving strangely (failing to calibrate, giving inappropriate measurement values,
etc.) and you have attempted to rectify the problem by servicing the sensor (for instructions, see
Sensor maintenance on page 24) but to no avail, you may wish to use the Hach 3654
Troubleshooting menu to make sure that the instrument is configured correctly for your application,
and is in good working order.
The instrument must be connected to your PC and placed in measurement mode to perform these
tests.
9.1.1 Serial test
Normally, the analyzer will inform you of a disconnected RS-232 (serial) link when appropriate.
However, you can confirm a good connection using the Troubleshooting, Serial Link Test by
echoing a test message via the instrument.
Enter text characters in the Text to be sent box, then click Send. If the serial link is operating
correctly, the exact same text will be displayed back from the instrument in the Echo box. Choose
Cancel to exit from this test box.
9.1.2 Keyboard test
The Troubleshooting, Keyboard Test will reveal whether all the analyzer buttons are functioning
correctly.
Press any one of the instrument's buttons (except the ON/OFF button) for a full second or more. The
appropriate square on-screen should darken. Choose Cancel to exit from this test box.
9.1.3 Display test
Choosing Troubleshooting, Display Test lets you perform a one-way communication between
computer and instrument.
Type a number (with or without a decimal point) in the Number box, select the measurement Units,
and then click Send. The number entered and the indicator bar placement, should appear on your
instrument LCD.
9.1.4 Clock settings
Choose the Clock settings command to set the date and time in the instrument.
The first screen displays the current date and time as set in the instrument. If this is correct, choose
Ok, else if either date or time must be changed, choose Modify to bring up the next screen. Enter
the current date and time and choose Ok to store the entry into the instrument. All measurements will
be noted with the appropriate date and time when they are downloaded to the Hach 3654 program.
9.1.5 Analog voltages view
The Troubleshooting, Analog Voltage View gives a real-time look at voltages used by the system
to transmit information about sensor current, temperature and pressure. This is useful when trying to
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storage cylinder pressure is below 100 bar.
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W A R N I N G
storage cylinder, using
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