•Check the voltage setting (110 or 220 VAC) on the back of the instrument. Ensure that it is set to the correct voltage. If the pointer is not aligned to the local voltage, turn the selector to point to the correct voltage.
•Perform a sensor regeneration by following these steps:
Connect the line cord between the connector on the back of the
Press the ON switch and then press the REGEN button.
The instrument will begin a 10 minute regeneration cycle, indicated by .H.H.H flashing on the display. Do not interrupt this cycle. For a complete description of this process, see page 12.
If any error message, such as .P.P.P, appears on the display, see the “Troubleshooting” section beginning on page 24.
•When regeneration is complete, zero the sensor by pressing the ZERO button and turning the zero adjust screw, located under the handle, until the display reads 0.
•The instrument is now ready to sample.
•To ensure the input to the instrument contains no hydrogen sulfide or mercaptans, use a Zero Air Filter, AZI P/N Z2600 3905. The Zero Air Filter cleans the air sample and should produce sample readings of less than 0.003 mg/m3. Therefore, use the filter to:
Equilibrate the instrument to temperatures that are higher or lower than the instrument. Sample with filter installed until the reading is below 0.003 mg/m3.
Identify contamination within the unit.
Confirm the presence of hydrogen sulfide when readings are elevated. Install filter and verify that the readings go down with filter installed.
•When the instrument measures hydrogen sulfide, the zero display will be replaced with H.
CAUTION
Do not adjust the ZERO after the instrument has measured hydrogen sulfide or before the next regeneration. (Occasionally the display may drop to .L.L.L (indicating low) between the initial zeroing and the first sample. It is OK to readjust the ZERO if the instrument has not measured hydrogen sulfide.)
•The instrument is designed for ambient air monitoring. DO NOT allow the probe or the instrument’s intake to be exposed to any liquid.
•The instrument is not explosion proof.
•Press the SAMPLE button to start a 10 second sampling cycle.
•Perform sensor regeneration after each day’s testing.
•Perform another sensor regeneration and
•Perform sensor regeneration after 30 days of storage or inactivity.
Call AZI Customer Service, at (800)
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