2.3 Setting up the sampler
Power
This GENT sampler operates with 220-230V, 50 Hz. The power consumption is about 0.3 kW.
The unit is expected to be setup in a specialised housing that protects the unit from direct contact to the ambient environment, i.e. hot and cold air temperature, high humidity, direct sunlight etc.. Usually the sampler is installed in a special housing, for example in an air quality sampling station. In special cases it might be appropriate to install the sampler in a laboratory space and to use a less than 100 m long pipe to connect the SFU to the pump. In same areas, for example in Mongolia in winter where the air temperature may drop below -30 ºC, this might be the only feasible way to run the GENT sampler.
The sampler is expected to be connected to mains power continuously; otherwise the timer will not operate. If the sampler is run manually, than the mains power may be disconnected after sampling.
Flow rate
For this programme, the flow rate used for airborne particulate matter sampling was agreed to be 16 – 17 lpm. This flow rate can be adjusted in a test run.
1. Completely install the GENT sampler.
2. Connect piping from SFU to sampler.
3. Load coarse and fine filters in stacked cassette.
4. Install cassette properly into black container.
5. Turn on GENT sampler.
6. Close valve.
7. Check for vacuum leaks.
8. Adjust flow rate on flow rate meter by turning valve from closed to open until the recommended flow rate has been achieved.
Now the GENT sampler should be ready for operation. Note: Don’t forget to replace the coarse and fine filters before commencing the sampling. You may keep the test filters