YOKOGAWA PH200

IM 12B6C2-E-H
35
7-9. Auto return
ACCESS CODE : 07 (see §7-2)
DISPLAY : *RET
Adjustment : (X)
Automatic return to measu ring when no
keys were pus hed for 10 minutes.
Explanation:
As a safeguard against long maintenance
jobs or inadvertently pushing a button it is
possible to let the system return to its nor-
mal function of measurement when no keys
are pushed for 10 minutes. When you have
activated Hold and entered a routine the
system will return to measurement after 2x
10 minutes.
Default : 1 = ON
7-10. Buffer tables
ACCESSCODE : 08, 09, 10 (see §7-2)
DISPLAY : *BUF.ID
The following tables can be changed by the
user.
Explanation:
There are 3 separate buffer tables in memo-
ry. All three tables work in the same way. As
a default all buffer tables are set to the nomi-
nal values of 7.00, 4.00 and 9.00 for all tem-
peratures between 0 and 50°C. The first
thing to do if you want to use your own
buffer tables is to program the values of
these tables. The first thing you will see is
*BUF.ID: buffer identity number. As a default
it is set to the same value as the pH used in
the table. You can change it to indicate a
change you made. After pushing ENT you
will be prompted with the first buffer value at
0°C. By choosing NO you will skip to the
next value.
By choosing YES you can adjust the value
to your wishes. The next value is 5 °C and
then on to 50 °C in 5 ° steps. Examples of
commercially available buffer solutions are
mentioned in the literature.
NOTES:
1. It is not necessary to program every sin-
gle value of the table.
2. By pushing NO, values are skipped; the
system will use interpolation between
values.
3. The two digit number entered as BUF.ID
is shown in the calibration routine after
CAL....
X
0 OFF
1 ON
Servicecode 08 09 10
BUF.ID 07 04 09
0 °C 6.98 4.01 9.46
5 °C 6.95 4.01 9.39
10 °C 6.92 4.00 9.33
15 °C 6.90 4.00 9.27
20 °C 6.88 4.00 9.22
25 °C 6.86 4.01 9.18
30 °C 6.85 4.01 9.14
35 °C 6.84 4.02 9.10
40 °C 6.84 4.03 9.07
45 °C 6.83 4.04 9.04
50 °C 6.83 4.06 9.01