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...4 OPERATION AS A SIMULATOR
4.3 Calibrating 4500 and 4600
Series Analyzers
4.3.1 Calibration Mode – Fig. 4.2
ABB 4500 and 4600 Series analyzers
incorporate buffer values within their memories
for automatic calibration. Table 4.1 gives the
millivolt value for different temperature values
for the five standard buffers stored in the
Models 4530/40. Only the 4 and 9 values apply
to the Models 4535/45 and 4630/35.
When checking 4500 and 4600 Series
analyzers for accuracy, or when determining
the correct functioning of the automatic
temperature compensation, refer to Table 4.1
to ascertain the required millivolt value
equivalent to a pH value at a given
temperature.
Note. Before
following procedure, check the
electrode connections – core to
glass, screen to reference and earth
connection to solution earth of the
instrument (Models 4530 and 4540
only).
Refer to Fig. 4.2 and:
Set the Function switch to 'CALIBRATE'.
1
Set the Mode switch to 'pH' or 'mV'
2
(dependent on requirement).
Set the Power switch to 'ON'.
3
Carry out an automatic pH calibration check
using the 4500 and 4600 Series calibration
1
tC
p
H
0
1
0 .
8
3
1
0
1
0 .
9
3
2
0
1
0 .
9
3
2
5
1
0 .
9
3
3
0
1
1 .
0
3
4
0
1
1 .
0
3
5
0
1
1 .
1
3
6
0
1
1 .
1
3
7
0
1
1 .
1
4
8
0
1
1 .
2
4
9
0
1
1 .
3
4
9
5
—
Table 4.1 mV Equivalents for 4500 and 4600 Series Instruments Buffer Values
4
carrying
out
the
4
m
V
p
H
m
V
2
0
8 .
4
0 .
0
0
1
6
2
3
2
0 .
3
9 .
9
7
1
6
8
4
3
8 .
4
0 .
0
0
1
7
4
4
9
6 .
4
0 .
0
5
1
7
7
5
4
9 .
4
0 .
1
1
1
7
9
6
6
6 .
4
0 .
2
7
1
8
4
7
8
3 .
4
0 .
5
0
1
8
9
8
9
4 .
4
0 .
8
0
1
9
3
0
1
0 .
4
1 .
1
6
1
9
6
1
2
0 .
4
1 .
5
9
1
9
9
2
3
0 .
4
2 .
0
8
2
0
1
—
4
2 .
3
5
2
0
2
procedure as detailed in the appropriate
instruction manual.
Use the 'OUTPUT ADJUST' control to
4
inject the required pH or millivolt value,
selected from Table 4.1.
The same procedure can be used to check the
instrument in the Manual Calibration mode if
required.
Note. Once
calibration
operate the FUNCTION switch on
the transmitter and then use the
simulator to inject alternative pH
values to check the performance of
the instrument.
Carry out the impedance tests as described on
page 7.
7
p
H
m
V
6 .
7
1 .
0
–
5
4 .
7 .
7
0 .
5
–
2
8 .
5 .
7
0 .
0
0
2 .
6
9 .
9
0
6 .
8 .
6
9 .
7
1
8 .
7 .
6
9 .
7
1
9 .
2 .
6
9 .
7
1
9 .
0 .
6
9 .
7
2
0 .
4 .
6
9 .
9
0
7 .
1 .
7
0 .
3
–
2
1 .
2 .
7
0 .
8
–
5
8 .
0 .
—
—
a
successful
has
been
TEMP
OUTPUT
C
ADJUST
1000M
40
60
100k
25
80
CALIBRATE
20
MEASURE
0
100
TEMP
CALIB
SLOPE
ON
OFF
Temp
mV
pH
2
3
Fig. 4.2 Calibration Mode
9
p
H
m
V
9
4 .
7
5
–
1
3
4
1 .
1
0
9
3 .
4
7
–
1
3
1
9 .
1
9
2 .
3
3
–
1
2
9
9 .
1
9
1 .
8
2
–
1
2
9
1 .
9
9
1 .
3
4
–
1
2
8
4 .
9
9
0 .
5
1
–
1
2
7
4 .
9
8
9 .
8
3
–
1
2
7
1 .
9
8
9 .
3
2
–
1
2
7
7 .
9
8
8 .
9
8
–
1
2
9
2 .
9
8
8 .
8
0
–
1
3
1
7 .
9
8
8 .
4
0
–
1
3
2
6 .
9
8
8 .
9
0
–
1
3
8
1 .
9
pH
achieved,
4
1
1
0
p
H
m
V
2 .
7
0
–
1
7
7
2 .
0
1 .
5
4
–
1
7
7
2 .
0
0 .
4
5
–
1
7
7
1 .
9 .
9
5
–
1
7
7
2 .
9 .
4
8
–
1
7
7
3 .
8 .
6
6
–
1
7
8
1 .
8 .
0
0
–
1
7
9
5 .
7 .
5
3
–
1
8
2
0 .
7 .
2
8
–
1
8
5
7 .
7 .
2
5
–
1
9
0
9 .
7 .
5
0
–
1
9
8
2 .
7 .
7
0
–
2
0
2
3 .
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