Teledyne 6020 - Photometric analyzer - Manual (Page 79)

Photometric Analyzer Maintenance 3
Part II 3-1 Teledyne Analytical Instruments
Maintenance
3.0 Routine Maintenance
3.1 Automatic operation and routine operational duties
The system operates continuously without adjustment. Under normal
conditions, after you program the system for automatic operation, only routine
maintenance procedures are necessary. The most common failure condition is
a temporary interruption of the power serving the instrument. If the power
service is interrupted, the source lamp in the analyzer will restart automatically
as long as there is no defect in the lamp circuit or its starter.
You can detect a lamp off condition with the signal failure alarm circuit,
but you must connect the relay contacts from the alarm to your indicating device.
In addition, you will experience an alarm condition when the cell windows are
extremely dirty or the electronics fail in the detector-converter, log amplifier, or
inverter circuits. When the alarm circuit is powered independently from the
analyzer power source, the alarm circuit is fail-safe and will detect power failure.
A message such as "Cell Fail check the detector signal" might be
displayed if lamp off condition occurs
3.2 System Visual Check and Response Procedure
1. Verify that the signal failure alarm is not in failure condition.
2. Verify that the zero and span control setting have not been
disturbed.