Model 306 Ozone Calibration Source Manual Rev. G-1
22
Target temperature is
never reached.
Absent or loose connection
of temperature probe cable
to circuit board.
Heater is burned out.
Remove top cover and
reattach connector to
circuit board.
Replace cartridge heater.
Instrument does not
output ozone.
Photolysis lamp is burned
out.
Cable not properly
connected between lamp
and circuit board.
Replace lamp and
recalibrate instrument.
Remove top cover and
reconnect lamp cable to
circuit board.
Select switch does not
work.
Cable not properly
connected between select
switch and circuit board.
Remove top cover and
reconnect select switch
cable to circuit board.
Serial port does not
work.
Cable not properly
connected between serial
port 9-pin connector and
circuit board.
Wrong serial cable used.
Wrong baud rate selected.
Wrong com port assigned.
Remove top cover and
reconnect serial port cable
to circuit board.
A “straight through” serial
cable is provided. Some
data collection devices
require a
”cross-over”
cable in which pins 1 and 3
are exchanged between
the two ends of the cable.
Use a “cross-over cable or
additional connector that
switches pins 1 and 3.
Make sure that the baud
rate is set to 4800.
Make sure that the com
port assigned by your
computer matches the com
port setting in your terminal
emulator (e.g., Tera Term
or Hyperterminal).
