Xylem FDO 925 - Manual (Page 15)

FDO
®
925 Technical data
31 ba75898s01 04/2010
Measurement
conditions
Measuring ranges at 20 °C
(68 °F) 0 ... 20 mg/l D.O.
0 ... 200 % D.O
.
saturation
0 ... 400 mbar D.O. partial pressure
Temperature range 0 ... 50 °C (32 ... 122 °F)
Max. admissible overpres-
sure 2.5 x 10
5
Pa (2.5 bar)
Immersion depth min. 6 cm
max. 25 m (depending on the cable length)
Operating position any
Approach flow not required
Storage conditions Recommended storing
method in the check and storage vessel,
FDO
®
Check
Storage temperature 0 ... 50 °C (32 ... 122 °F)
Characteristic data
on delivery
Zero signal < 0.1 % of the saturation value
Response time at 20 °C
(68 °F) in stirred solution t
90
(90% of the final value display after) < 30s
t
95
(95% of the final value display after) < 45s
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