Hanna Instruments ph 301 ユーザーズマニュアル

21

20

Allow 1 or 2 minutes for
the electrode to stabi-
lize.

pH is displayed on the
primary display and tem-
perature on the second-
ary one.

If readings are out of
range  "---" will appear
on the LCD display.

Press the .00/.000 key to change the resolu-
tion from two to three decimal points.

It is recommended that the electrode is rinsed
thoroughly for better conditioning. For this
rinsing process, it is recommended to use a
liberal amount of the sample to be measured.

If measurements are taken in different samples
successively, it is recommended that the elec-
trode and the temperature probe are rinsed
thoroughly with deionized water or distilled
water (if not available, tap water may also be
used) and then blot dry between each mea-
surement.

The pH reading is directly effected by tem-
perature. In order for the meter to measure
the pH accurately, temperature must be taken
into consideration.

A perfect equilibrium between the pH elec-
trode and the sample is reached in approxi-
mately 15 minutes.

To use the meter's Automatic Temperature
Compensation feature, submerge the
HI7669/2W temperature probe into the sample

°C

pH

pH

°C

pH

See program No. 1 (page 60).

Press TIME to display the time (HH/MM).

Press TIME again to display the date (MM/
DD).

Make sure that the instrument has been cali-
brated for pH before taking pH measure-
ments (see page 29).

For pH 300 and pH 302 only:

Select the pH measurement mode
by pressing RANGE.

For pH 301 only:

Select the pH measurement
mode by pressing pH.

To take a pH measurement
simply submerge the tip (4cm/
1½") of the pH electrode and
the temperature probe into the
sample to be tested.

DATE

4 cm

(1½")