Amersham Pharmacia Biotech AKTA design pH/C-900, Руководство пользователя

Страница: 15 / 40

3.7 Calibrating conductivity
The cell constant for the particular flow cell is written on the flow
cell packaging. Refer to section B.2.3 in Reference information for
how to enter the cell constant.
Adjustment of the cell constant is only necessary when the monitor
is to be used to determine specific conductivity with high accuracy.
The procedure is described in Reference information section B.2.2.
Calibration can also be performed from UNICORN.
3.8 Using an external chart recorder
The external chart recorder outputs for pH and conductivity from
the monitor are 0 – 1 V. There is also a 4 – 20 mA signal available
at the same output connectors.
For the conductivity signal, 0% represents 0 V and 100% represents
1 V as set under main menus
Set Cond scale 0%
and
Set Cond scale
100%
.
For the pH signal, the full scale and zero level has to be set
according to below.
1 Select main menu
Set pH Analogue Out
,
press OK.
2 Select sub menu
Set pH Full Scale
.
Set the range value, press OK.
The range is the full scale pH range for the chart recorder (1 V).
3 Select sub menu
Set pH Zero Leve
l
, press OK.
4 Set the value, press OK. The zero level is the pH value
corresponding to 0 V to the chart recorder. The difference
between zero level and full scale must be at least 1 pH unit.
Monitor pH/C-900
User Manual 18-1120-06 Edition AC
11
Operation
3
Set pH Zero Level
(pH 2.00) 4.00
Set pH Full Scale
(pH12.00) 11.00
Set pH Analogue Out
18-1120-06_AC.qxd 1999-04-14 14:16 Sida 11 (1,1)