COSA Xentaur SF6 Purity Pro - Manual (Page 12)

12
2-7. Affection on Measurement from Pressure
Caution
When a concentration change occurs suddenly on the RK60000, the correct reading cannot be shown.
The absorption tube is also used for stabilizing the temperature of the sampling gas. Therefore, be
sure to equip an absorption tube on the GAS IN whenever the measurement is taking place.
Caution
The pressure in the Gas Chamber changes from the atmospheric pressure while sampling the gas. As a
result, the indication will not be accurate (note that if an instant pressure change occurs in the Gas
Chamber or the reference Chamber, the indication might also go wrong.) If these symptoms occur,
perform the AIR CAL right away. Also, be sure to note the following points:
> Do not plug the GAS IN or GAS OUT while the gas is feeding.
> Do not attach or detach the sampling tube/absorption tube while the gas is feeding.
> Keep the pressure of GAS IN, GAS OUT, and REF. OUT equal to the atmospheric pressure
when the indication is read.
> Read the indication after the gas flow stops.