wtw inoLab 740, Operating Manual

Page: 253 / 274

Technical data
253
15.3 pH/electromotive force of the electrode:
Measuring modules for the inoLab Level 3:
pH, pH/ION, pH/Cond, pH/Oxi and Multi.
Note
The technical data of the electrodes are not taken into
consideration here.
General information
Measuring ranges
and resolution
Input resistance 5 x 10
12
Ω
Input current Typically 5 x 10
-13
A
< 5 x 10
-12
A at 25°C
Slope (pH) -62 ... -50 mV
Asymmetry (pH) -30 ... +30 mV
pH
Measuring range 1
(Resolution) - 2.000 ... + 16.000 (0.01)
Measuring range 2
(Resolution) - 2.00 ... + 16.00 (0.1)
Electromotive force U [mV]
Measuring range 1
(Resolution) - 999.9 ... + 999.9 (0.1)
Measuring range 2
(Resolution) - 1999 ... + 1999 (1)
Temperature
T [°C] (Resolution) - 5.0 ... + 100.0 (0.1)
T [°F] (Resolution) + 23.0 ... + 212.0 (0.1)