OPERATOR FUNCTIONS (RUN MODE)
4.1 DISPLAY BUTTON
The upper line on the display will always read oxygen % or ppm, or oxygen % and carbon dioxide.
The following are available for display on the lower line.
1. OXYGEN SENSOR EMF (millivolts)
2. OXYGEN SENSOR TEMPERATURE
3. OXYGEN SENSOR IMPEDANCE, a measure of integrity of the oxygen sensor's electrode.
4. SAMPLE OXYGEN (AND CARBON DIOXIDE)
5. AMBIENT TEMPERATURE
6. AMBIENT RELATIVE HUMIDITY
7. DATE –TIME
8. RUN HOURS SINCE LAST SERVICE
9. DATE OF LAST SERVICE
10. BALANCE GAS (%). A calculation of the balance of the volume of gas being sampled. Oxygen and carbon
dioxide are subtracted from 100% if ‘O
2
/CO
2
’ is selected in set-up 27. If ‘Display Sample’ or ‘Fast Sample’
is selected in set-up 26, the BALANCE GAS is calculated from the SAMPLE values of oxygen and carbon
dioxide.
Any number of these variables can be displayed sequentially by pressing the ‘DISPLAY’ button. Items can be selected
for display or deleted in set-up step 29 on the keyboard. In addition to the above lower line displays, the Analyzer will
automatically display:
10 OXYGEN NOT READY, until the sensor is over 650°C (1200°F). If the heater does not get the sensor up to
650°C (1200°F) within 20 minutes, the “OXYGEN NOT READY” message will be replaced by a “HEATER
FAIL” alarm.
11 SENSOR CALIBRATION, occurring for oxygen Cal Gas
NOTE
The run time will be the period of time the Analyzer is powered. This timer can be used as a sensor replacement and/or
gas generator service schedule aid. The start time is reset by changing the ‘SERVICE DAY’ in set-up mode.
Setu
AlarmDis
la
Pur
e
Run
Ente
O
tion
Function
O
tion
Function
Cal 2
Cal 1
Alarm
Setu
Ox
en % 2.83
Figure 4.1 Operator's Panel
4.2 ALARM BUTTON
Page 24 Teledyne Analytical Instruments 9070 Oxygen Analyzer
