22
pH
ISFET Calibration
– available if an ISFET sensor is connected
The calibration method is selected in the configuration menu.
pH Calibration
Measurement
cal
CAL
ISFET‑ZERO
Select the “ISFET‑ZERO” calibration mode to set
the operating point for the first sensor calibra‑
tion.
cal
“pH setpoint” blinks
Use
to set the buffer solution value.
Immerse the sensor in buffer solution.
cal
Calibration is performed. The ISFET operating point is displayed.
The meter then automatically returns to measuring mode.
Keep the sensor connected to the Portavo while performing the next calibration
step. The operating point will be taken into account for the following calibration.
When using ISFET sensors for pH measurement, the individual operating point of the
sensor first needs to be determined, and should be in the pH 6.5...pH 7.5 range. The
sensor is immersed in a buffer solution with a pH value of 7.00 for this purpose.
Note:
The operating point only needs to be determined once for each ISFET sensor.
To abort calibration, you can press
meas
at any time.
Содержание Portavo 904X COND
Страница 2: ......
Страница 67: ...67 pH Buffer Tables 01 Mettler Toledo Nominal values in bold C pH ...
Страница 68: ...68 pH Buffer Tables 02 Knick CaliMat Nominal values in bold C pH ...
Страница 69: ...69 pH Buffer Tables 03 Ciba 94 Nominal values 2 06 4 00 7 00 10 00 C pH 1 extrapolated ...
Страница 70: ...70 pH Buffer Tables 04 Technical Buffers to NIST Nominal values in bold C pH 1 values added ...
Страница 72: ...72 pH Buffer Tables 06 HACH Nominal values 4 01 7 00 10 01 0 02 at 25 C C pH ...
Страница 73: ...73 pH Buffer Tables 07 WTW Technical Buffers Nominal values in bold C pH ...
Страница 74: ...74 pH Buffer Tables 08 Hamilton Nominal values in bold C pH ...
Страница 75: ...75 pH Buffer Tables 09 Reagecon Nominal values in bold C pH 1 values added ...
Страница 76: ...76 pH Buffer Tables 10 DIN 19267 Nominal values in bold C pH 1 extrapolated ...