Filter
Top Products
Survey Mode
The survey mode takes samples every 3 to 20 seconds automatically. The length of time varies
with the hydrogen sulfide concentration. Use this mode to locate the source of hydrogen sulfide,
such as a leak, a hot spot, or to assess areas of potentially high hydrogen sulfide concentrations.
After the survey mode is activated, the 631-X samples continuously.
• Press the power ON button.
The digital meter displays 000.
Disregard the LCD’s initial momentary readings.
Recharge or replace the battery pack if the LO BAT indicator REMAINS ON, see page 17
and/or page 21 if necessary.
• Allow a 1-minute warm up before beginning the next step to ensure the instrument's
electronics have stabilized.
• Lock the instrument in the survey mode:
Hold the SAMPLE button down until the sensor status indicator bar(s) begin flashing on
the display.
Press the ZERO button, then release the SAMPLE button.
The pump should continue to run and the display should update every survey cycle.
• The instrument remains in the survey mode until one of the following occurs:
The sensor is saturated.
A LO BAT (low battery) signal is encountered.
An HL (high hydrogen sulfide level) is encountered.
The instrument is turned OFF.
• Press the power OFF button to end the survey mode.
RANGE CONCENTRATION RESPONSE TIME
0 0.001 to 0 .099 ppm 20 Seconds
1 0.10 to 0.99 ppm 15 Seconds
2 1.0 to 9.9 ppm 6 Seconds
3 10 to 50 ppm 3 Seconds
NOTE: Approximately 100 samples at 0.5 ppm may be taken before the sensor saturates and
regeneration is required.
AZI Customer Service 800-528-7411 or 602-470-1414 Page 15 of 50