Hanna Instruments ph 301 User Manual

TROUBLESHOOTING GUIDE

Symptoms

Problem

Solution

Defective ATC
probe

Defective pH
electrode

The electrode is
not working or
the reference
junction is
clogged

Defective pH
electrode

Out of range-pH
scale

Out of range-°C
scale

Out of range-mV
scale or ION for
pH301

Erroneous buffer
solution used for
offset cal.

Defective
electrode

Erroneous buffer
solution used for
slope cal.
Defective
electrode

Replace the probe

Replace the electrode

Leave the electrode in a
storage solution after
cleaning the junction. If
problem persists,
replace the electrode

Follow the cleaning
procedure. If this doesn't
work replace the
electrode

Replace the electrode

a) Check the calibration
b) Assure the pH sample

is in the range 0 to 14

c) Check the level of

electrolyte and the
state of the electrode
itself

Make sure the °C is within
0-100° and temperature
probe is plugged

Electrode not connected

Make sure the buffer solution
used corresponds to the
selected buffer value and
replace if necessary

Replace the electrode

Use fresh buffer solution

Replace the electrode

The meter does not
work with the
temperature probe
The meter fails to
calibrate or gives
faulty readings

The meter is slow
in responding or
gives faulty
readouts

The meter does not
accept the 2

buffer

solution for
calibration

The reading drifts

Display shows:

"WRONG

BUF

and/or

"WRONG "

Display shows:
"WRONG

BUF

and/or

"WRONG "

Rel mV

°C

INTERFACE WITH PC

Data transmission from the instrument to the
PC is now much easier with the new HI 92000
Windows

compatible application software of-

fered by Hanna Instruments.

User friendly, HI 92000 offers a variety of
features and has an on-line help feature to
support you throughout all situations.

HI 92000 allows you to use the powerful means
of the most diffused spread sheet programs
(e.g. Excel

, Lotus 1-2-3

). Simply run your

favorite spread sheet and open the file down-
loaded by HI 92000. It is then possible to
make any elaboration available with your soft-
ware (e.g. graphics, statistical analysis).

To install HI 92000 you need a 3.5" drive and
a few minutes to follow the instructions con-
veniently printed on the disk label.

Contact your Hanna Dealer to request a copy.

To connect your pH meter to the PC use
HI 920010, available through your Hanna
Dealer. Make sure that your meter is switched
off and plug the connectors, one into the
meter RS232 connector, the other into the
serial port of your PC.

Note: Cables which are different from the

HI 920010 may use a different con-
figuration. In which case any commu-
nication between the meter and the
PC is not possible.

Excel

Lotus 1-2-3

Windows

and Windows Terminal

are registered Trademark of "Microsoft Co."