Hach EZ Series Basic User Manual page 27

9.2 Show the active alarms
A red box for alarms and an orange box for messages shows on the Home screen for new messages
or alarms. Do the steps that follow to show the messages or alarms that occurred:
1. To see the active messages and alarrms, push F3 > RIGHT arrow key (2x) > Message.
2. To reset an alarm, scroll to select a message or alarm, then push the Acknowledge (A) button.
Note: Some messages and alarms are automatically reset.
3. To see a list of the saved messages and alarms, push F3 > RIGHT arrow key (3x) > History to
see a list of all of the messages and alarms that occured on the analyzer.
9.3 Examine for leaks and malfunctions
1. Make sure that all of the components in the analyzer cabinet are operating correctly (e.g, pumps,
valves, dispensers, photometer/electrode and stirrer). Refer to
on page 23.
Do a measurement to examine the photometer/electrode measurement values. If the values are
not the usual result, do a calibration.
2. Examine all of the components in the analysis compartment, the connectors and tubings for
leaks.
3. Examine the reagent, zero, calibration and cleaning solutions and the sample stream
connections. Make sure that the connections are tight and with no leaks.
4. Examine the air pressure connection. Make sure the air pressure is correct (6 to 7 bar for
pneumatic valves activation or 1 to 2 bar for enclosure air purge).
9.4 Prepare and replace the reagents
Fire hazard. The user is responsible to make sure that sufficient precautions are taken when the
equipment is used with methods that use flammable liquids. Make sure to obey correct user
precautions and safety protocols. This includes, but is not limited to, spill and leak controls, proper
ventilation, no unattended use, and that the instrument is never left unattended while power is
applied.
Chemical exposure hazard. Dispose of chemicals and wastes in accordance with local, regional and
national regulations.
Do not mix new reagents with old reagents. Discard the old reagents before new reagents are added to bottles.
1. Reagents and solutions are supplied by the user. Use only reagents supplied by a certified
company. As an alternative, follow the instructions from the Method&Reagent Sheet from the
specific application (EZxxxx) on the manufacturer's website to prepare the reagents.
2. Discard the old reagents from the bottles. If necessary, rinse the bottles with tap water.
3. Fill the bottles with new reagents. Make sure that the tube touches the bottom of the bottle. Make
sure that the tube is not twisted and does not have a blockage.
9.5 Examine and clean the electrode
The electrode maintenance is based on the type of electrode. Refer to the information supplied with
the electrode.
W A R N I N G
C A U T I O N
N O T I C E
Do a test on the components
English 27