wtw inoLab Multi 9310 IDS, Руководство по эксплуатации, Страница: 29 / 114

inoLab
®
Multi 9310 IDS pH value
ba75937e10 08/2021
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When operating a sensor without integrated temperature sensor, e.g.
via an IDS pH adapter, you have to measure and enter the temperature of the
test sample first.
The display of the temperature indicates the active temperature measuring
mode:
5.2 pH calibration
5.2.1 Why calibrate?
pH electrodes age. This changes the zero point (asymmetry) and slope of the
pH electrode. As a result, an inexact measured value is displayed. Calibration
determines and stores the current values of the zero point and slope of the
electrode.
Thus, you should calibrate at regular intervals.
5.2.2 When do you have to calibrate?
 Routinely within the framework of the company quality assurance
 When the calibration interval has expired
5.2.3 Calibration procedure
The Multi 9310 IDS provides 2 calibration procedures:
 Automatic calibration (AutoCal)
The buffer solutions used are automatically identified during the calibration
procedure. The relevant nominal values are used automatically.
Prerequisite:
The buffer set used has been set in the meter (see section
10.1.2 B
UFFER SETS FOR CALIBRATION
, page 70).
 Manual calibration (ConCal)
Any buffer solutions can be used. The nominal values of the buffer solutions
are manually entered by the user during the calibration procedure.
5.2.4 Carrying out automatic calibration (AutoCal)
Make sure that, in the menu for measurement and calibration settings (in the
menu pH/
<ENTER>
/
Calibration
/
Buffer
), the correct buffer set is selected
(see section 10.1.1 S
ETTINGS FOR P
H
MEASUREMENTS
, page 69).
Temperature
sensor Resolution of
the temp. dis-
play Temp. measurement
yes 0.1 °C Automatic with temperature
sensor
- 1 °C Manual