Hach SIGMA 900, Руководство пользователя

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Page 27
8837mnt.fm
Maintenance
Section 4 Maintenance
CAUTION
Always disconnect power to the
sampler before performing any
maintenance or service.
This chapter explains how to replace the pump tubing, open the controller
housing, replace the desiccant module, and inspect and replace fuses.
4.1 Cleaning the Sampler
4.1.1 Cleaning the Refrigerator
To maintain efficient heat transfer, clean the condenser fins and coils every
6 to 8 months. The condenser is the finned element that resembles an
automobile radiator and is located behind the access cover on the back of the
sampler cabinet.
4.1.2 Cleaning the Sampler Cabinet
Clean the interior and exterior sample cabinet with a damp sponge and mild
detergent. Do not use any type of abrasive cleaners.
4.1.3 Cleaning the Sample Bottles
Clean the bottles using a brush and water with a mild detergent, followed by a
fresh water rinse and a distilled water rinse. Glass bottles may also be
autoclaved.
4.1.4 Cleaning the Intake Tubing and Pump Tubing
Clean the tubing by pumping water with mild detergent or other cleaning
solution through the tubing, using the peristaltic pump in Manual Pump Mode.
Press the
MANUAL MODE
soft key (see section 5.9 on page 43 for more
information).
4.1.5 No Lubrication Required
The sampler does not require routine lubrication. Do not lubricate the pump
tube with petroleum jelly, silicone grease, oil, or any other lubricant, as this will
substantially reduce the life of the pump tube and roller assembly.
4.2 Pump Tubing Maintenance
CAUTION
Always disconnect power to the
sampler before removing the
pump cover.
Replacement pump tubing is available from the manufacturer in 15' bulk
length (Cat. No. 4600-15), and 50' bulk length (Cat. No. 4600-50). Use of
tubing other than that supplied by the manufacturer may cause excessive
wear on mechanical parts and/or poor pump performance.
Only a qualified technician should service the Sigma 900 All Weather
Refrigerated Sampler. Some tasks, such as replacing the desiccant module,
are easy to do and can be performed by anyone. Other steps require
knowledge of CMOS electrostatic discharge precautions and advanced
electronics training and should only be performed by a qualified service
technician.
If you need assistance in performing any of the following service steps, please
contact the factory. The manufacturer maintains a highly-skilled service
department which will be happy to provide you with assistance in maintaining
the sampler.