Teledyne 6600 - Manual (Page 109)

Part III: 1-19
Oil in Water Part III
Teledyne Analytical Instruments
The reference voltage is checked by the ADC every ten minutes.
This indicates one or more of the following potential failure conditions:
1. The lamp has failed.
2. The cell windows have become so dirty that no light can pass through
the sample.
3. The sample is opaque, due to the presence of solids or undesirable
optical phenomena in the sample.
4. Condensation has occurred on the cell windows.
5. The signal processing electronics, phototube, signal cable, or demodu-
lator switch has failed.
6. The filter wheel is loose on the motor shaft.
7. The reference optical filter is dirty or defective.
8. The optical bench or lamp is out of alignment.
4.0 INSTALLATION
The oil-in-water system must be installed in an area where the ambient
temperature is not permitted to drop below 32 o C or rise above 122 o F
(50 o C),(for salt water applications, the freezing point is lower due to the salt
content). Cubicle installed systems (Models 6600), subject to the preceding
conditions, may be installed outdoors. Rack-supported systems must be
completely sheltered from the elements.
Note: Ambient temperatures below 0 o C, requires heated enclosures.
Rack-supported systems must be installed in a well-ventilated area to
prevent the surrounding atmosphere from becoming saturated with the
moisture being generated by the sample preconditioning processes of the
system.
Only in one case when the sample system uses gravity flow should the
system be installed on a level surface otherwise all other systems ar5e to
be with sufficient space allocated on either side (6 feet minimum) for person-
nel and test equipment access. Subject to the foregoing, the system should
be placed as close to the sample point as possible and bolted to its supporting