wtw pH 1970i, Руководство по эксплуатации

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pH 1970i Operation
31 ba75690e01 01/2007
Note
At this point, the ConCal calibration can be broken off with <M> . This
corresponds to a single-point calibration . For this, the instrument
uses the Nernst slope (-59.2 mV/pH at 25 °C) and the specified asym-
metry of the electrode.
8 To continue the two-point calibration , thoroughly rinse the
electrode with deionized water.
9 If necessary, enter the temperature of the second buffer solu-
tion with
<
▲
> <
▼
> .
10 Immerse the pH electrode into the second buffer solution.
11 Press the <RUN/ENTER> key. The second pH value appears
on the display.
12 Set the measured value to the nominal pH value of the buffer
solution (at the current temperature) with
<
▲
> <
▼
> .
13 When the measured value is stable, press the <RUN/ENTER>
key. The value of the slope (mV/pH) appears on the display.
The sensor symbol shows the evaluation of the current calibra-
tion.
14 Press the <RUN/ENTER> key. The value of the asymmetry
(mV) appears on the display.
Auto REL1
TEC
Store
AR
1
LoBat nLF Lin Oxi
Tref25 Tref20
ARng
8
Time
Year Ident
No. Day.Month
Baud
Sal cm 1/
K / %
RCL
REL2
pH / mV
m
cm
S/
%
mg/ l
Sal
O
S pH
s
2 4 8
L O
°
C
TP
Cal
Sal
cm
1/
K /
%
2 4 8
°
C
TP
Auto REL1
TEC
Store
AR
1
LoBat nLF Lin Oxi
Tref25 Tref20
ARng
8
Time
Year Ident
No. Day.Month
Baud
RCL
REL2
pH /
m
cm
S/
% mg/ l
Sal
O
S
pH
5 9 2
Cal
mV