Sigma 900 Max Refrigerated Sampler Troubleshooting Issues - Hach 900 MAX Instrument Manual

Appendix C

Sigma 900 MAX Refrigerated Sampler Troubleshooting Issues

Problem
Blown Fuse.
Instrument Will Not
Circuit breaker issue.
Power Up With ac
Breaker is good, but still no power.
Power.
Breaker and outlet are good, still no power.
If any holes on the anchor strainer are not
submerged the sampler will not create a lift.
Sampler Will Not
Create Sufficient Lift. Intake tubing is nicked or has a small hole.
Worn roller assembly and/or pump tubing.
The volume was calibrated incorrectly the
first time.
Incorrect intake tube length is programmed in
the sampler.
Intake tubing is not completely purging.
Anchor stainer is intermittently submerged.
Inaccurate Sample
Volumes
Worn roller assembly and/or pump tubing.
When using "Timed Calibrate" (liquid sensor
disabled) variable lifts will cause variable
sample volumes.
Liquid sensor is not functioning properly.
RPM's of the motor vary.
Improper calibration.
Desiccant is pink.
The sensor was not acclimated to the air
Submerged temperature before calibrated.
Pressure Sensor
level readings are
inaccurate or no
Water or debris in the atmospheric
change in level
reference tube.
readings.
Level is trending downward because debris at
the diaphragm.
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Troubleshooting and Error Messages
Cause
Check the 5-amp fuse on the back of the controller.
Check the circuit breaker for the main power.
Check to see if the outlet is receiving power.
Try using a battery or another power supply
Make sure the anchor strainer is
completely submerged.
Replace with new tubing.
Replace assembly and/or tubing.
Make sure the proper calibration method is used for
the site conditions (Auto or Timed calibrate).
Re-enter the tube length.
Place the tubing at a downward slope from the
sampler to the liquid source.
Install the shallow depth anchor strainer,
(Cat. No. 2071 or 4652).
Replace assembly and/or pump tubing.
Enable sensor and calibrate volume if site
conditions allow.
Check the liquid diagnostics screen for valuable
information about sensor sensitivity.
Replace motor if necessary.
Make sure the unit has been calibrated.
Replace the desiccant.
Re-calibrate the sensor making sure the sensor is at
ambient temperature.
Clean the area and re-calibrate. To reduce debris on
the cable and mounting band, route the cable along
the edge of the band and wrap the cable and
mounting band with plastic tape. The cable should exit
at or near the top of the pipe to keep it out of the flow
stream.
Remove the plate and carefully clean the transducer.
Re-calibrate the sensor.
Solution
8990apdx_tbl.fm