wtw Stirrox G, Operating Manual, Page: 17 / 22

StirrOx G Technical data
17 ba25310d07 08/2018
Measurement
conditions
Measuring ranges at 20 °C
(68 °F) 0 ... 50 mg/l D.O.
0 ... 600 % D.O. saturation
0 ... 1250 mbar D.O. partial pressure
Temperature range 0 ... 50 °C (32 ... 122 °F)
Depth of immersion
(with stirring paddle) min. 49 mm
max. 83 mm
Max. allowed overpressure according to an immersion measurement up
to the max. immersion depth
Operating position vertical with membrane cap downward
Approach flow by integrated stirring system
Storage
conditions
Recommended storing
method in the calibration and storage vessel,
OxiCal
®
-ST (moist)
Storage temperature 0 ... 50 °C (32 ... 122 °F)
Characteristics
when delivered Zero signal < 0.1 % of the saturation value
Response time of D.O.
measurement at 20 °C
(68 °F) t
90
(90 % of the final value display after)< 10 s
t
95
(95 % of the final value display after)< 15 s
t
99
(99 % of the final value display after) < 45 s
Reproducibility < 0.3 %
Own consumption of
oxygen at 20 °C (68 °F) 0.008
μ
g·h
-1
(mg/l)
-1
Drift Approx. 3 % per month in the operating
condition
Response time of
temperature measurement t
99
(99 % of the final value display after)< 60 s
Precision of temperature
measurement ± 0.2 K
Working life min. 6 months with one electrolyte filling