HAFFMANS c-DGM/i-DGM
Page 30 of 78 c-DGM/i-DGM
Method:
1. Connect the DGM sampling hose to the sampling point. Place the end of the outlet hose
(DGM) in a drain and secure it in place.
Attention!
When samples are under low pressure, the instrument must
be placed as low as possible. The extra pressure reduces the
chance of gas bubbles escaping during sampling.
2. Retract the handle (pos. 20) to the stop so the liquid can flow into the measurement
chamber of the DGM.
3. Open the cock at the sampling point.
4. Use the throttle valve (pos. 12) to adjust the flow rate so that no gas bubbles can
escape into the measuring chamber. The throttle valve may not stop the flow of the
product.
If an O
2
measurement is chosen during the sampling, the O
2
value can (also) be displayed
on the c-DGM by pressing the ENTER button.
Attention!
If the throttle valve is fully closed, this can result in an
incorrect CO
2
value.
5. Start the measurement by slowly and evenly pushing the handle.
* If a combined O
2
measurement is performed, the O
2
value is shown on the display and
stored in memory.
The CO
2
measurement begins.
If any liquid is left in the DGM, the handle must always be in
open position.
After a measurement, the handle must be opened to avoid a
possible pressure build up that can damage the DGM.
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