37
Section 7
Maintenance
7.1 ISFET pH probes maintenance
Note: The following information applies to new ISFSET pH Probes and/or sensors left in
extended dry storage.
Depending upon the application, the expected life of an ISFET probe is
approximately 18 months. The reference electrode contains a KCl gel, which
becomes increasingly diluted with usage and time. The reference is sealed and is
not refillable. When it becomes difficult to calibrate (pH buffer value does not stop
flashing during calibration or takes an excessively long time to stop flashing), the
probe should be replaced. Refer to
Section 8 Troubleshooting on page 41
for
information about error codes and actions.
•
Do not store an ISFET probe in solution or use for long-term pH measuring
applications. Store stainless steel ISFET Probes dry. Extended immersion will
shorten the life of the probe.
•
Do not leave an ISFET probe uncapped for long term storage. Place the
protective cap over the probe tip if the probe will not be used for weeks or
months.
•
Do not allow oil, fat, food particles, starch, protein or other materials to remain
on the probe tip after use.
•
Do not use a sharp metal object (needle, pin, etc.) to clean the sensor surface.
•
Do not take readings in direct sunlight. Direct sunlight may cause unstable
readings or difficulty in calibration. Contact an authorized dealer for optional
light shields.
•
Do not use the probe in an environment that will damage the sensor, such as
hydrofluoric acid or abrasive samples.
•
Do not use the probe in environments that will damage the epoxy materials
used in the probe tip. Avoid acetone, toluene, methylene chloride, xylene, and
other strong organic solvents.
•
Do not use in environments with static electricity. Electrostatic discharge may
permanently damage the probe.
•
Do not expose the ISFET probe to repeated temperature extremes (60 °C or
higher).
•
Do not use the probe for applications that require the probe to cycle between
hot and room temperature samples.
•
Do not put any other active measurement devices in buffers or samples while
measuring pH or conductivity. Even if another device is not actually turned on,
AC power interference can still occur.Cleaning and storage
D A N G E R
Indicates a potentially or imminently hazardous situation which, if not avoided, will result in
death or serious injury.
Summary of Contents for H160
Page 2: ......
Page 12: ...Installation 10...
Page 38: ...Conductivity TDS Operations 36...
Page 46: ...Troubleshooting 44...
Page 52: ...Index 50...
