YSI 550A
Y S I
Environmental
Page 11
SPECIFICATIONS
Display Resolution Range
Accuracy
0 to 20 mg/L
± 0.3 mg/L or ± 2% of reading,
whichever is greater
Dissolved O
2
mg/L
0.01 mg/L or 0.1 mg/L,
user selectable
20 to 50 mg/L
± 6% of reading
0 to 200%
± 2% air sat or ± 2% of reading,
whichever is greater
Dissolved O
2
%
0.1% or 1%, user
selectable
200 to 500%
± 6% of reading
Temperature ºC
0.1 ºC
-5 to +45 ºC
± 0.3 ºC
Temperature ºF
0.1 ºF
23 to 113 ºF
± 0.6 ºF
Medium:
Fresh, sea or polluted water
Dissolved Oxygen Sensor:
Steady-state polarographic
Dissolved Oxygen Probe:
Field-replaceable module
Dissolved Oxygen Response Time:
95% of end value in 9 seconds
Temperature Units:
Celsius or Fahrenheit, user selectable
Parameter Compensation:
Automatic temperature compensation for dissolved oxygen
Automatic salinity compensation (0-70 ppt) for dissolved oxygen
Altitude compensation for dissolved oxygen percent calibration
Size:
4.7 in. width; 9 in. length (11.9 cm x 22.9 cm)
Weight with Batteries:
2 lb. (0.91 kg)
Power:
4 alkaline C-cells
Battery life:
Over 2000 hours at 25°C (77ºF)
Cables:
12, 25, 50, and 100-foot lengths
(3.5, 7.5, 15, 30.5 meter lengths)
Other Features:
Waterproof to IP-67
High-impact resistance
Push-button calibration
Built-in calibration chamber
Large back-lit display
Low battery indicator on display
Manual salinity input
CE-compliance
