Hach-Lange ORBISPHERE KM1100 Basic User Manual - Manual (Page 12)

• in a place where the sample flow is stable and rapid, and as far as possible from:
• valves
• pipe bends
• the suction side of any pumps
• a CO
2
injection system or similar
Note: There may be situations where not all the above conditions can be met. If this is the case, or you have any
concerns, please consult your Hach Lange representative to appraise the situation and define the best applicable
solution.
Recommended sample flow rate
For optimal response time, the recommended sample flow rate for both the K1100 and
M1100 sensors is 150 mL/min. Control the flow with the outlet valve on the flow meter (No. 3 in
Figure 7 ) to avoid foam developing inside the flow chamber which could lead to erroneous oxygen
measurement values.
Figure 7 Typical measurement schematic
1 Valve to redirect sample for measurement 3 Flow meter with outlet valve
2 Sensor and flow chamber combination 4 Drain
User interface
Instrument controls
The instrument front panel provides:
• A touch screen acting as display, touch pad and keyboard.
• A LED, showing when the instrument is on.
Turning instrument On and Off
There is no power switch on the instrument. The mains must be disconnected to turn the instrument
off.
Measurement window
The main (numeric) measurement window continuously displays:
• Sensor measured values
• Measured sensor trends (for the last 10 minute to last hour)
• Measured sensor data alarm limits and other events
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