Xylem WQL-pH pH DATALOGGERS - Manual (Page 69)

WQL-pH Technical data
143 ba75821e01 10/2009
13 Technical data
13.1 Measurement characteristics
Measuring
principle
Potentiometric measurement by means of combination electrode
pH measurement Measuring range ** 0.000 ... +20.000
Resolution 0.001
Accuracy **
≤
0.005 ± 1 digit
mV measurement Measuring range ** -1000.0 ... +1000.0 mV
Resolution 0,1 mV
Accuracy **
≤
0.2 mV ± 1 digit
Temperature
measurement
Temperature sensor Automatic recognition of the temperature
sensor of the electrode:
NTC 30 (30 k
:
at 25 °C / 77 °F) or Pt1000
Measuring range ** -5.0 ... 105 °C (+23 ... 221 °F)
Resolution 0.1 K
Accuracy **
≤
0.1 K ± 1 digit
** Note:
The measuring ranges and accuracy exclusively refer to the measuring
electronics of the logger without the electrode. For the measuring ranges
and accuracy of the operable logger, the specifications of the electrode and
buffer solutions have also to be taken into account.
Logger function Measuring interval adjustable:
1 / 5 / 10 / 30 s
1 / 5 / 10 / 15 / 30 min
1 / 2 / 3 / 6 / 9 / 12 / 24 h
Capacity of the data
memory 600.000 measurement datasets