Transportation; Flow Doublling Technique - Ametek 303B User Manual

Operating Procedure (Checklist)
With the instrument connected to a sample gas stream, proceed as follows:

Refer to the Parameters Affecting Operation — Temperature in Section 1 for temperature
variation factor.
NOTE

To prevent cell saturation, always shut sample gas off before turning the monitor off.
NOTE
3. Press the desired ANALOG RANGE key. The LED of the selected RANGE

Transportation

When the instrument is being moved from place to place, cap the GAS IN and OUT fittings
to prevent moisture and dirt from entering the lines. If the time lapse between use is less
than twenty four hours (on average), the STANDBY switch should be pressed (LED ON)
while not in use. This provides a low current to keep the cell dry through electrolysis. Cell
equilibra-tion time prior to the next analysis then is reduced. This current draw will not
significantly discharge the battery.
Flow Doubling Technique
If the instrument is used to measure moisture in toxic or flammable gases, the GAS OUT
!
must exhaust to an area deemed safe and appropriate by the local authority having ju-
WARNING
risdiction. Take appropriate precautions.
4-2 | 303B Moisture Analyzer Manual
1. Press the POWER key (LED ON). The system will run through a series
of test displays, then start displaying moisture values.
2. Check sample gas for:
• Pressure — Regulated 69 to 690 kPa ± 5 percent (10 to 100 psi) gauge ±5
percent
• Flow — ≈ 100 mL/min at 1 atmosphere
• Bypass — ≈ mid-scale
• GAS IN temperature — between 10°C and 50°C
will turn ON.