Analytical Industries GPR-1200 MS ATEX Portable PPB Oxygen Analyzer User Manual
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Establishing Power to the Electronics:
Establish power to the analyzer electronics by pushing the red ON/OFF key. The digital display responds
instantaneously. When power is applied, the analyzer performs several diagnostic system status checks termed
“START-UP TEST” as illustrated below:
START-UP TEST
 
ELECTRONICS – PASS 
BATTERY – PASS 
TEMP SENSOR – PASS 
BARO – N/A 
 
REV X.XX
In the unlikely event the LED warning indicator LOW BATT comes on when the analyzer is turned on – proceed
immediately to the sub-section on Battery Considerations at the end of section 5 Operation.
Note: The analyzer display defaults to the sampling mode when 30 seconds elapses without user interface.
0.000 PPM
AUTO SAMPLING
1 PPM RANGE
24.5 C
 
 
Menu Navigation:
The five (5) pushbuttons located on the front of the
analyzer operate the micro-processor:
1. green ENTER (select)
2. yellow UP ARROW 
3. yellow DOWN ARROW 
4. blue MENU (escape)
5. red ON/OFF
Main Menu:
Access the MAIN MENU by pressing the MENU key: 
 
MAIN MENU
AUTO SAMPLE
MANUAL SAMPLE 
CALIBRATION 
 
