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Daily Operations
Before each day's use of the Jerome 631-X, perform the following steps to verify proper
instrument operation:
• Press the power ON button.
The digital meter displays 000.
(Disregard the digital meter's initial momentary reading.)
Recharge or replace the battery pack if the LO BAT indicator REMAINS ON. Refer to
“Charging Batteries” on page 17 and/or “Replacing the Battery Pack” on page 21.
To ensure the instrument's electronics have stabilized, allow a 1-minute warm up
before beginning the next step.
• Use the Zero Air Filter to equilibrate the instrument to ambient air temperature.
Install the Zero Air Filter in the instrument’s intake.
Sample continuously until the readings stabilize.
• Perform sensor regeneration. Refer to page 12 for the procedure.
• Thirty minutes after sensor regeneration is complete, zero the instrument. See page 13.
NOTE: For maximum accuracy, such as when testing with the Functional Test Module,
wait 30 minutes after the sensor regeneration cycle to re-zero the unit. For immediate
use, the unit can be re-zeroed immediately after sensor regeneration. See the notes on
page 13.
• Press the SAMPLE button.
During the sample cycle, the digital meter displays
bars (-, --, or ---) to indicate the amount of sensor
saturation.
• At the end of the sampling cycle, read the digital
meter.
The number shown on the digital meter is the
hydrogen sulfide concentration in ppm.
This value remains on the display until the next
sample is taken.
The digital meter automatically zeroes at the start
of each sample.
• At the end of each day's use, perform sensor
regeneration as described in the next section.
DO NOT ALLOW HYDROGEN SULFIDE TO STAY
ON THE GOLD FILM SENSOR OVERNIGHT.
AZI Customer Service 800-528-7411 or 602-470-1414 Page 11 of 50