Campbell-scientific OBS-3A Turbidity and Temperature Monitoring System Bedienungsanleitung PDF herunterladen (Seite 56)

OBS-3A Turbidity and Temperature Monitoring System

10 20 30 40 50

Sediment Concentration (mg/l)

Turbidity (NTU)

Hand Shaking

15-min. Sonic Bath

3-min. Sonic Probe

FIGURE 7-1. Effects of disaggregation

Preparation

1. Clean containers and glassware with detergent and rinse with filtered

water.

2. Perform the calibration under fluorescent lighting.

3. Based on the material, select the appropriate sample duration from TABLE

7-2.

TABLE 7-2. Sample Durations for

Sediment Calibrations

Sediment Seconds

Clay 10

Silt 20

Fine Sand 40

4. Open the calibration the screen under OBS-3A Configuration |

Operation | Calibration | Calibrate and select mg/L.

5. Enter sediment concentration values.

6. After each addition of sediment, compute mg/L or ppm with the equations

given below.

1 2 ... 51 52 53 54 55 56 57 58 59 60 61 ... 71 72

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Campbell-scientific OBS-3A Turbidity and Temperature Monitoring System Bedienungsanleitung Seite 56