Hach 29971-72, User Manual

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remove the discs supplied with the bottle protection to adjust the height of the bottle (supplied discs: 6, 20 and
50 mm).
2. Pull the piercing lever to the horizontal position to pierce the beverage sample cork, crown or cap.
3. Use the top black block on the piercing head to lower the sampling tube to near the bottom of the
beverage sample. Refer to
Figure 8 .
4. Set the gas pressure and open the on/off valve on the lower block of the piercing head (F). Adjust
the flow rate to approximately 200 mL/minute for carbonated beverages or 100 mL/minute for
non-carbonated beverages.
• For wine flow rate, and for liquids with suspended particles, use the pressure control valve at
the gas source.
• For sparkling liquids, use the screw at the top of the flow chamber.
5. If bubbles are seen in the tubing, change the flow rate of the liquid and/or the gas pressure to
remove the bubbles. The applied gas pressure must be more than the dissolved CO
2
pressure in
carbonated liquids.
6. Wait until the gas concentration that shows on the instrument display is stable. Record the
measurement value.
Note: Some indicating instruments automatically record the measurement value when a PC is connected to the
instrument. Refer to the indicating instrument documentation for the correct measurement procedure.
7. When the gas measurement is complete for the package sample, do the steps that follow:
a. Close the on/off gas valve on the lower block of the piercing head.
b. Lift the sample tube up to the highest position.
c. Push the piercing lever to the vertical position.
d. Remove the beverage sample.
Figure 8 Package measurement
16 English