Teledyne API M452 Ozone Sensor Instruction Manual, 02852, Rev. E
5-2
5.2 Status Outputs Table 5-1 below describes the function of the status outputs. More details
as to the meaning of the status outputs are described in the following
sections.
Table 5-1: Status Outputs
Output # Name On State Off state
1 Sensor
O.K. Normal State Reference or
Measure > 4995mV;
Reference <
1000mV
2 Invalid
Reading Pressure > 45 psia,
Negative Ozone
Concentration
Normal State
3 Lamp
Low Reference
Detector<600mV Normal State
4 Cell Dirty Measure/Reference
ratio < 0.5 (zero
gas)
Normal State
The normal state for the Sensor O.K. output in ON. During the warm-up
period on start-up this output will stay off until the UV lamp reaches a
minimum intensity. If this output remains off after the 15 minute warm-up
period, or goes off during normal operation, then the M452 is in need of
servicing.
If the Sensor O.K. output turns off AND the Lamp Low output is on, this
indicates that the lamp intensity has below the minimum level required for
proper operation.
If the Sensor O.K. output turns off and the Lamp Low output is also off,
then one of the analog voltages in the sensor has exceeded the range of the
internal A/D converter. Adjustment by qualified service personnel is
required.