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Survey Mode
Survey Mode takes samples continuously. The result is displayed every 12 to 52
seconds,
depending on the H
2
S concentration present. Use this mode to locate hydrogen sulfide spills,
leaks, or hot spots, or to assess areas of potentially high hydrogen sulfide concentrations.
Sampling in the survey mode is not as accurate.
•
Press the power
I/O
button.
•
The display will light up and show the instrument serial number and software revision.
If necessary, press
ESC
to clear any calibration reminders.
Next, the digital meter displays 0.000 ppm (or 0.00 ppb, depending on the selected
Range). If the battery meter is empty and flashing, recharge the battery. See
To ensure the instrument's electronics have stabilized, allow a 5-minute warm up
before beginning the next step.
•
From the Main Screen,
press ► to enter the Main Menu.
•
From the Main Menu, select the Sample menu.
•
Scroll through the Sample menu to Survey Mode.
•
Press
ENTER/START
to select Survey Mode and begin sampling.
The instrument performs a 4-second purge of the flow system, and then begins survey
mode sampling.
The display updates the measured concentrations at the end of each sample cycle.
NOTE: Approximately 100 samples at 0.5 ppm may be taken in Range 1 before a sensor
regeneration is required.
The pump will continue to run and the display will update with a new hydrogen sulfide
concentration reading every 12 to 52 seconds.
Press any button to stop survey mode sampling and perform a final purge of the flow
system.
The instrument remains in the survey mode until one of the following occurs:
A button is pressed on the keypad.
The SAMPLE button is pressed.
The sensor is saturated
A low battery signal is encountered
The instrument is turned OFF.
The final survey value remains displayed on the main screen until the next sample is
taken.
•
Press the power
I/O
button to turn the instrument off when not in use.
