Trace Oxygen Analyzer | Installation 3 | |
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The specific descriptions for each type of alarm are as follows:
Alarm #1 | Programmable as high or low alarm (actuates when |
| concentration is above threshold). Can be set anywhere |
| between 0 and 9999ppm, but must be set ABOVE the |
| threshold set for the LO Alarm. |
Alarm #2 | Programmable as high or low alarm (actuates when |
| concentration is below threshold). Can be set anywhere |
| from 0 to 9999ppm. |
Sensor Fail | Actuates when the output of the |
| falls below the acceptable level. |
CAUTION: | There could be hazardous voltage at the alarms termi- |
| nals, even when power is removed from the instrument. |
3.4Gas Connections
The standard Model 3300TB has two inlets and one outlet fixture only. Calibration gasses can be connected into the "Span" inlet. All of the gas connections are 1/4 inch brass fittings.
A switching valve is provided to feed the analysis unit with either sample or gas.
A flowmwter and flow controller valve are part of the system and will assist in setting the flow of the gas.
Sample flow should be adjusted to 2 SCFH. The sample vent connec- tion should not restrict the sample flow. The sensor is designed to operate at atmospheric pressure. Restricting the sample vent line will result in pressur- izing the sensor and altering the O2 reading.
The pressure required will depend on the sampling system. When venting into a constant pressure, such as the atmosphere, controlling input pressure is simple. If you are venting into a system of varying pressure, then some form of pressure regulation is required to maintain a constant pressure across the sensor.
The Sample and Span pressure is not to exceed 50 psig (345 kPa).
Teledyne Analytical Instruments |
