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O
G
ENERATOR
3
This feature in the Utilities>Diagnostics menu is used to manually turn the ozone generator
off and on. This should be done before disconnecting the generator, to prevent ozone from
leaking out, or after a system restart if the user does not want to wait for 30 minutes during
warm-up time.
Note
INTERNAL SPAN GAS GENERATOR AND VALVE OPTIONS
The zero/span valves and internal span gas generator options need to be enabled in the
software (contact the factory on how to do this).
The semi-permeable PTFE membrane of the permeation tube is severely affected by
humidity. Variations in humidity between day and night are usually enough to yield very
variable output results. If the instrument is installed in an air-conditioned shelter, the air is
usually dry enough to produce good results. If the instrument is installed in an environment
with variable or high humidity, variations in the permeation tube output will be significant.
In this case, a dryer for the supply air is recommended (dewpoint should be –20° C or less).
The permeation tube of the internal span gas generator option is heated with a proportional
heater circuit and the temperature is maintained at 50°C ±1°C. Check the IZS Temp in the
Dashboard or the IZS Temp Raw signal in the Utilities>Diagnostics>Analog Inputs menu.
At 50° C, the temperature signal from the IZS thermistor should be around 2500 mV.
TEMPERATURE SENSOR
B
T
OX
EMPERATURE
The box temperature sensor (thermistor) is mounted on the motherboard below the bottom
edge of the CPU board when looking at it from the front. It cannot be disconnected to check
its resistance.
Box temperature will vary with, but will usually read about 5° C higher than, ambient
•
(room) temperature because of the internal heating zones from the NO
reaction cell and other devices.
To check the box temperature functionality, we recommend checking the Box Temp
•
signal voltage in the Utilities>Diagnostics>Analog Inputs menu (Section 5.7.3).
At about 30° C, the signal should be around 1500 mV.
•
•
To check the accuracy of the sensor, use a calibrated external thermometer /
temperature sensor to verify the accuracy of the box temperature by:
Placing it inside the chassis, next to the thermistor labeled XT1 (above connector
•
J108) on the motherboard.
Compare its reading to the value of the PMT TEMP.
•
164
Teledyne API T200 NO/NO
O
VERRIDE
The ozone generator does not turn on if the ozone flow conditions
are out of specification, e.g., if there is no flow through the system
or the pump is broken.
S
ENSOR
/NO
Analyzer with NumaView™ Software
2
x
converter,
2
083730200A DCN7962
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Table of Contents
Troubleshooting
