Firmware Updates; Probe Storage And Maintenance; Contact Teledyne Isco - Teledyne TIENet 301 Installation And Operation Manual

TIENet® 301 pH/Temperature Device
Section 2 Installation and Setup for Signature

2.5 Firmware Updates

2.6 Probe Storage and
Maintenance
2.7 Contact Teledyne
ISCO
2-12
The TIENet device's firmware is updated via the USB port on the
front panel of the Signature Flow Meter. Step-by-step instruc-
tions for updating the firmware can be found in Section 2 of the
Signature user manual.
If you remove the pH probe from operation, be careful to keep the
glass sensor bulb wet. Exposure to air causes the glass mem-
brane on the sensor bulb to dry out. This makes it very slow to
respond in solution. Prolonged or repeated dehydration of the
bulb will ruin the probe.
The guard cap is to protect the probe during shipment and
storage and to keep the glass membrane and liquid junction from
drying out. If you remove the probe for any reason, clean it and
replace the cap after filling with 4.0 buffer solution. Never store
the probe dry or without the cap in place.
The pH-sensitive glass can also become "conditioned" to its envi-
ronment, especially when it is continuously exposed to high pH
(10 and above) solutions. The glass does have a memory and will
respond slowly when exposed to a lower pH solution after having
been in a high pH solution for any significant period of time.
Storage of a pH probe in a 4.0 buffer solution is recommended, as
this has a regenerative effect on the glass and does not put a
memory on it. Tap water will work if 4.0 buffer solution is not
available. Deionized water is good for quick rinses to clean the
element, but not for prolonged storage of an electrode. Con-
tinuous exposure of the ion-sensitive membrane to a wetted, but
non-ionic solution will improperly condition the membrane.
The reference electrode is also adversely affected when allowed
to dry out. Salt crystals from the electrolyte or precipitates of the
solution measured will form salt bridges either within or on the
surfaces of the liquid junction, causing the reference to be less
conductive and resulting in a higher reference impedance. This
condition will typically worsen until the unit no longer functions.
Soaking the reference electrode in a 4.0 pH solution, or tap water
if the buffer is not readily available, may bring the reference back
to life. Boiling the electrode in 4.0 buffer solution or tap water
could revive the electrode in more severe situations. If none of
these solutions work, it may be necessary to replace the probe.
If you have further questions about the installation, operation,
and maintenance of your TIENet device, please contact our
service department at:
Teledyne ISCO
4700 Superior St.
Lincoln, NE 68504
Phone: 866 298-6174 or 402 464-0231
Fax: 402 465-3022
E-mail: IscoService@teledyne.com