Hach LDO, User Manual

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5
Section 1 Specifications
Specifications are subject to change without notice.
Table 1 LDO Probe Specifications
Components
Corrosion-resistant materials, fully-immersible sensor with 10 m (30 foot)
cable
Measuring Range (Dissolved Oxygen) 0 to 20.00 ppm (0 to 20.00 mg/L) or 0 to 200% saturation
Measuring Range (Temperature) 0 to 50 °C (32 to 122 °F)
Measurement Accuracy Below 1 ppm: ± 0.1; Above 1 ppm: ±0.2
Temperature Accuracy ±0.2 °C
Repeatability ±0.5% of span
Response Time
To 90% in less than 40 seconds
To 95% in less than 60 seconds
Resolution
Below 10 ppm: ±0.07 ppm or mg/L, ±0.1% saturation
Above 10 ppm: ±0.01 ppm or mg/L, ±0.1% saturation
Interferences
No interferences from the following: H
2
S, pH, K
+1
, Na
+1
, Mg
+2
, Ca
+2
, NH
4
+1
,
Al
+3
, Pb
+2
, Cd
+2
, Zn
+2
, Cr (tot), Fe
+2
, Fe
+3
, Mn
+2
, Cu
+2
, Mi
+2
, Co
+2
, CN
–1
,
NO
3
–1
, SO
4
–2
, S
–2
, PO
4
+3
, Cl
–1
, Anion Active Tensides, Crude Oils, Cl
2
–1
Probe Operating Temperature 0 to 50 °C (32 to 122 °F)
Probe Storage Temperature –20 to 70 °C (–4 to 158 °F); 95% relative humidity, non-condensing.
Minimum Flow Rate Non required
Sensitivity ±0.5% of span
Calibration/Verification
Air Calibration: one point, 100% water saturated air; Sample Calibration:
comparison to standard instrument, or comparison to Winkler Titration
method
Probe Immersion Depth and Pressure Limits Submersible to 107 m (350 ft)/1050 kPa (150 psi)
Sensor Interface Modbus
Sensor Cable
10 m (30 ft) integral cable with quick-disconnect type plug. Additional cable
length may be added by using a junction box. Up to 100 m with extension
cables.
Up to 1000 m using the Junction box.
Probe Weight 1.4 kg (3 lb, 2 oz.)
Probe Dimensions 60 x 292 mm (2.4 x 11.5 inch)
Warranties
Probe: 3 years
Sensor Cap: 1 year