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Transmitter 9135 – pH/redox measurement
pH CALIB.
2pts
TYPE
:
BUF1
: 3.75 pH
BUF2
: 8.05 pH
Select
pH CALIB.
Process
TYPE
:
pH CALIB.
Values
TYPE
:
SLOPE
: 102 %
OFFSET : 00.12 pH
Select
The user calibrates the pH measurement with 2 of
the 3 standard buffers from the table chosen :
−
NIST
:
4.00, 6.88, 9.22
−
DIN 9 :
4.00, 7.00, 9.00
−
DIN 10 :
4.00, 7.00, 10.00
The
user
does
calibration.
2 point calibration
Calibration type used when the user has no
standard buffer (4.00/6.88/9.22). The buffer value
remains the same to a constant temperature and
the user enters them only one time when he
programs the calibration.
Process calibration
Note :
Warning ! This calibration is only active on the
zero shift.
The user calibrates on one point using 1 buffer or
the sample to measure. The user needs to enter the
buffer or sample value for each calibration.
Values calibration
The user has calibrated his electrodes in the
laboratory. He programs the slope and zero values
(% of 59.16 mV/pH) he has measured in the
laboratory.
Slope and offset limits
An error message is displayed if the slope is not in-
between [70 %, 120 % or offset in-between [-3 pH, +
3 pH].
See Chapter error messages and Troubleshooting
not
enter
any
value
during
Page 35
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