Hach Sigma 950, Инструкция по эксплуатации инструмента

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Troubleshooting
Troubleshooting the Bubbler Depth Sensor
Problem Cause Solution
Low Bubbler Pressure
Bubbler does not turn on during
initialization.
Power unit off for 10 seconds and power back on. Listen
for the bubbler pump to turn on during unitization. If the
pump does not run, contact the factory.
Desiccant is pink. Change the desiccant.
Desiccant is blue.
Check the bottom of the cartridge for a blockage or
coating.
Kinks in the bubbler module airlines. This is determined with the unit open. Remove kinks.
Clogged Bubbler Blockage in the bubble tube.
Remove the vinyl bubbler tube from the bubbler port on
the side of the flow meter case and check for
obstructions.
Visually check the end of the bubble tube port for solids
blocking the line.
Check the bubble line/cable for any tight bends that may
cause a kink in the line.
No Change in Bubbler
Depth Readings
Reference port desiccant is pink and is
causing a blockage in the reference port.
Replace with new desiccant.
The desiccant is blue and no change in
depth readings.
Remove the tube connecting the desiccant cartridge to
the reference port on the side of the meter. If the depth
readings return to normal, the desiccant cartridge is
plugged. Carefully remove the desiccant end caps and
check the air intake area for debris. Make sure the
membrane is not coated with grease.
Incorrect Flow Totals
Improper flume installation. Walls include
bows or bends.
Reinstall the flume in a more appropriate site location.
Incorrect depth on the AV meter. Adjust the depth.
Turbulence
The turbulence should be at least 5 pipe diameters
behind the sensor and 10 diameters in front. For
greatest accuracy it should be a smooth laminar flow
near the sensor.
Inaccurate Bubbler
Depth Readings
Bubbler needs to be calibrated. Calibrate the Bubbler.
Tubing is plugged.
Use the purge line in the options menu to clear line.
Decrease the time for auto purge to 10 minutes. Also,
clean out the bubble line with 40 to 50 psi of compressed
air or replace the bubble line.