Cambridge Sensotec Rapidox 1100ZR-H-PFC-E O
2
Analyser Instruction Manual
Version 1.2
6
Last printed 22/07/2015 18:08:00
corrected by re-calibrating (see section 7.6).
7.4
Display Behaviour
Once at temperature the LCD display will show the oxygen reading (in percent or
ppm) on line 1. The symbol AL1 or AL2 may also appear in the bottom right of
the LCD if the alarm system is enabled and an alarm condition applies. The
oxygen sensor reading may flash or show “O/Range” when its limits are reached,
and error messages will be displayed if there is a fault with the sensor. See Table
2 for more details:
Oxygen Sensor Display Possibilities
O
2
Reading > 9999.9%
Display shows “O/Range”
O
2
Reading >0.5ppm and < 9999.9%
Display shows the normal oxygen reading in % or ppm
O
2
Reading <0.5ppm
Display shows <0.5ppm flashing
O
2
Reading is flashing
Indicates that the pressure sensor is out of range and
automatic pressure correction is on.
O
2
Sensor takes > 10 minutes to warm up
Display shows “Possible sensor Fault” because the sensor
heater is failing.
O
2
Sensor has failed completely or become
disconnected
Display shows “No sensor or sensor Fault”
O2 Sensor is OK but the pressure sensor is faulty and
the auto pressure correction mode is selected
Display shows “Fault” flashing.
Pressure Sensor Possibilities
Pressure Reading is >1000mbar
Display shows “O/Range Press.”
Pressure Reading is >-1000mbar and <1000mbar
Display shows the normal pressure reading in mbar, bar,
kPa, torr or psi
Pressure Reading is <-1000mbar
Display shows “U/Range Press.”
Pressure sensor has failed completely or become
disconnected
Display shows “Fault Press.” With the word “Fault” flashing
Table 2: Different display possibilities depending on the sensor reading.
7.5
Menu Access / Passwords
The analyser has an option to set a password that will restrict access to the menus.
The password menu is disabled by default in the factory. If you wish to password
protect the analyser press ENT and scroll down to the PASSWORD option (Menu
option 11). Pressing ENT again will ask you for the default password which is
“0000”. Enter this using the UP and DOWN arrows. Once the password has been
entered successfully you can chose between ENABLE and DISABLE in the menu
using the UP and DOWN keys.
The other option is to RESET the password to a new value. The password must be
4 digits long and can be any combination of numbers from 0-9. Make sure that the
new password is noted down!
If the password function has been enabled then in the future each time the menu
system is accessed then the password prompt will display. After the correct
password is entered then the full menu will be accessible. You can make as many
changes as you want to the options and only press ESC once you have finished.
Pressing ESC takes you out of the password protected area and you will have to re-
enter the password to go back in again.