Model 306 Ozone Calibration Source Manual Rev. G-1
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6.
USING THE VOLTAGE OUTPUT (Vout)
6.1
Using the Voltage Output to Measure Ozone Output Concentration
Using the BNC connector on the back of the Model 306, the user can monitor a
voltage signal that is proportionally scaled to the ozone output setting. When set to
output zero ozone, the voltage output will be 0.05 Volts. The voltage output ranges
from 0.05 V to 1.05 V for ozone output. The scaling factor is 1mV/ppb. For example,
if set to output 200 ppb of ozone, the voltage output should be 0.250 Volts (0.05 +
0.001*Ozone).
If the zero-ozone setting is greater than 0.05 V, the user should make an adjustment
from the
Cfg
/
Cal
/
Vout
menu to subtract the voltage offset above 0.05 V (see
Section 4.2.1).
6.2
Using the Voltage Output for Error Diagnostics
Error messages are displayed as voltages in the range 1.55 V to 2.00 V, as described
below. An output signal below 0.05 V indicates that the 3-way valve is set so that the
output air is coming from the sample inlet.
TEMPERATURE LOW ERROR: 1.55 V
TEMPERATURE HIGH ERROR: 1.60 V
FLOW LOW ERROR: 1.65 V
FLOW HIGH ERROR: 1.70 V
INTENSITY LOW ERROR: 1.75 V
INTENSITY HIGH ERROR: 1.80 V
FLOW and TEMPERATURE ERROR: 1.85 V
FLOW and INTENSITY ERROR: 1.90 V
TEMPERATURE and INTENSITY ERROR: 1.95 V
FLOW, TEMPERATURE, and INTENSITY ERROR: 2.00 V
