C.B.S. Scientific TTGEK-2401-220 - Manual (Page 54)

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SECTION 5
Maintenance of Equipment
5.1 Care and Handling
The plastic components of the DGGE units are fabricated from acrylic and polycarbonate. Electrodes and connectors
are made from pure platinum, stainless steel, and chrome plated brass. As with any laboratory instrument, adequate
care ensures consistent and reliable performance.
After each use, rinse buffer chamber, gel tray and combs with de-ionized water. Wipe dry with a soft cloth
or paper towel, or allow to air dry. Whenever necessary, all components may be washed gently with water
and a non-abrasive detergent, and rinsed and dried as above. Never use abrasive cleaners, glass cleaning
sprays or scouring pads to clean the components, as these will damage the unit and components.
Additional precautions:
• Do not autoclave or dry-heat sterilize the apparatus or components.
• Do not expose the apparatus or components to phenol, acetone, benzene, halogenated hydrocarbon
solvents or alcohols.
• Avoid prolonged exposure of the apparatus or components to UV light.
• Do NOT treat with diethylpyrocarbonate (DEPC)-treated water for extended periods at 37°C. A
brief rinse with DEPC-water is sufficient after a thorough wash.
5.2 Maintenance & Calibration
The following inspection and maintenance procedures will help maintain the safety and reliable performance of the
Mini-Horizontal systems. Replacement parts can be ordered by calling 858-755-4959 or by contacting your local
distributor.
• Banana plugs and power cords should be inspected regularly. If the banana plugs become loose
or do not feel friction tight replace the plugs or power cords.
• Should power cord assemblies (connectors, wire or shrouds) show any signs of wear or damage
(e.g. cracks, nicks, abrasions, or melted insulation), replace them immediately.
• The platinum wire is secured to the banana jack by compression between a stainless washer and
the jack nut. The nut/washer interface should be tight and free of corrosion.
5.2a Heater
The heater should be kept clean. If deposits build up on the heater, they may be removed by scrubbing with a non-
metallic (plastic) abrasive pad. Do not use steel wool.
5.2b Pump Motor
The pump bearings are permanently lubricated with high-temperature silicone grease and do not require additional
lubrication. Should the bearings become noisy, replacement of the entire pump motor is recommended. This will
reduce repair labor costs and retain fluid pumping reliability.
A replacement pump and motor mounting kit is available (see Section 10 - Replacement Parts).
5.2c Calibration
At times there may be a minor temperature difference between the Controller’s displayed temperature and the actual
temperature as determined by a certified temperature measurement device. There may also be situations where
you want the displayed temperature to match a particular value to have standardization between different laboratory
instruments. These adjustments can be performed via the Controller’s password-protected calibration display(s).