wtw FDO 925 - Page 17

FDO
®
925 Technical data
17
ba75898e06 08/2015
Characteristic data
on delivery
Accuracy of D.O. measure-
ment at 20 °C (68 °F) in air-
saturated water
± 1.5 %
Zero signal ≤ 0.02 mg/l O
2
≤ 0.2 % O
2
saturation
≤ 0.4 mbar O
2
partial pressure
Response time at 20 °C
(68 °F) in stirred solution
t
90
(90 % of the final value display after)
< 30 s
t
95
(95 % of the final value display after)
< 45 s
t
99
(99 % of the final value display after)
<60s
Response time of tempera-
ture measurement
t
99
(99 % of the final value display after)
<60s
Precision of temperature
measurement
± 0.2 K
Working life of the sensor
cap
Min. 1 year with authorized use