Analytical Industries GPR-2000 ATEX Portable Oxygen Analyzer - Manual (Page 18)

Advanced Instruments Inc.
18
MAIN MENU
AUTO SAMPLE
MANUAL SAMPLE
CALIBRATION
>>> CALIBRATION
SPAN CALIBRATE
ZERO CALIBRATE
DEFAULT SPAN
DEFAULT ZERO
OUTPUT SPAN
OUTPUT ZERO
4. Advance the reverse shade cursor using the ARROW keys to highlight DEFAULT ZERO.
5. Press the ENTER key to select the highlighted menu option.
6. The following display appears and after 3 seconds the system returns to the SAMPLING mode:
FACTORY
DEFAULTS
SET
3.3%
AUTO SAMPLING
10 % RANGE
24.5 C
Output Zero
Accuracy due to manufacturer tolerances may result in a slight difference between the LCD display and the 0-1V analog output.
However, the difference is less than 0.25% of range and falls well below the specified accuracy of the analyzer. In rare
instances the 0-1V analog signal output may not agree to the reading displayed by the LCD. This feature enables the user to
adjust the 0V analog signal output when the LCD displays 00.00. Note: Adjust the 1V analog signal output with the OUTPUT
SPAN option described below.
Procedure:
1. Access the MAIN MENU by pressing the MENU key.
2. Advance the reverse shade cursor using the ARROW keys to highlight CALIBRATION.
3. Press the ENTER key to select the highlighted menu option.
4. The following displays appear:
MAIN MENU
AUTO SAMPLE
MANUAL SAMPLE
CALIBRATION
>>>
CALIBRATION
SPAN CALIBRATE
ZERO CALIBRATE
DEFAULT SPAN
DEFAULT ZERO
OUTPUT SPAN
OUTPUT ZERO
5. Advance the reverse shade cursor using the ARROW keys to highlight DEFAULT ZERO.
6. Press the ENTER key to select the highlighted menu option and the following display appears:
100.0
OUTPUT ZERO OFFSET
PRESS UP OR DOWN
TO CHANGE VALUE
ENTER TO SAVE
MENU TO RETURN