Analytical Industries GPR-2800 AIS ATEX Oxygen Analyzer - Manual (Page 15)

Advanced Instruments Inc.
15
Menu Navigation
The four (4) pushbuttons located on the front of the transmitter operate the micro-processor:
1. blue ENTER (select)
2. yellow UP ARROW
3. yellow DOWN ARROW
4. green MENU (escape)
Main Menu
Access the MAIN MENU by pressing the MENU key:
MAIN MENU
AUTO SAMPLE
MANUAL SAMPLE
CALIBRATION
CONFIG ALARMS
BYPASS ALARMS
Range Selection
The GPR-2800AIS transmitter is equipped with five (5) standard measuring ranges (see specification) and provides users with a
choice of sampling modes. By accessing the MAIN MENU, users may select either the AUTO SAMPLING (ranging) or MANUAL
SAMPLING (to lock on a single range) mode.
Note: For calibration purposes, use of the AUTO SAMPLE mode and ambient air (20.9% oxygen on the 0-25% range which
meets the 80% of FS recommendation described below) is recommended. However, the user can select the full scale MANUAL
SAMPLE RANGE for calibration as dictated by the accuracy of the analysis required – for example, a span gas with an 8%
oxygen concentration with the balance nitrogen would dictate the use of the 0-10% full scale range for calibration and a 0-10%
measuring range.
Auto Sampling:
1. Access the MAIN MENU by pressing the MENU key.
2. Advance the reverse shade cursor using the ARROW keys to highlight AUTO SAMPLE.
3. Press the ENTER key to select the highlighted menu option.
4. The display returns to the sampling mode:
MAIN MENU
AUTO SAMPLE
MANUAL SAMPLE
CALIBRATION
CONFIG ALARMS
BYPASS ALARMS
3.3
%
AUTO SAMPLING
10% RANGE
24.5 C 100 KPA
LO1 2% 10% HI2
The display will shift to the next higher range when the oxygen reading (actually the sensor’s signal output) exceeds 99.9% of
the upper limit of the current range. The display will shift to the next lower range when the oxygen reading drops to 85% of the
upper limit of the next lower range.