AZI Customer Service 800-528-7411 or 602-470-1414
Page 14 of 56
Sample Mode
This mode, used for standard operation, produces optimum accuracy (±5% at 0.100 mg/m
3
Hg)
with the Jerome
®
431-X.
•
Press the power ON button.
The digital meter displays 000. If the unit is set to display in ng, the digital meter
displays 00.0. (Disregard the digital meter's initial momentary readings.) Recharge or
replace the battery pack if the LO BAT indicator REMAINS ON. Refer to pages 17
and/or 21 for the procedure.
•
To ensure the instrument's electronics have stabilized, allow a 1 minute warm up before
beginning the next step.
•
Press the SAMPLE button.
During the sampling cycle, the bar (or bars) shown on the digital display indicate the
current percentage of sensor saturation. (Refer to Meter Display Codes, page 10, for
code descriptions.)
The bar (or bars) flash after 2 seconds and again after an additional 7 seconds. This
flashing signals the opening and closing of the solenoid sample bypass. (See the
Principles of Operation on page 8 for details.)
•
At the end of the 12 second cycle, read the digital meter.
The number shown on the digital meter is the mercury concentration in mg/m
3
(or ng).
This value remains displayed until the next sample is taken. The digital meter
automatically zeroes at the start of each sample.
•
When the sensor is completely saturated, the digital meter displays .8.8.8 instead of a
value. No further operation is possible until a sensor regeneration is performed. (Refer to
page 12 for the Sensor Regeneration procedure.)
•
Press the power OFF button when not in use. Install the zero air filter in the instrument
intake during storage.
Sampling Notes
The Jerome
®
431-X is intended for vapor use only.
DO NOT
allow the probe or the instrument's
intake to come in contact with liquids, dust or other foreign material. Moisture or liquids drawn
into the instrument can damage the sensor and flow system.
The Jerome
®
431-X operates a minimum of 6 hours on a fully charged battery.
Use the probe (AZI P/N1400-2002) to locate mercury vapor in hard to reach places. Plug the
probe directly into the instrument's intake.
