Hach 29971-72, User Manual

Page: 13 / 206

Install the optional piercing head
The system has one of the two piercing head models installed: 29973 or 29974. Refer to the steps
that follow to change the piercing head if necessary.
1. Push up the piercing lever to a vertical position to lift the piercing unit.
2. Lock the piercing unit with the orange vertical handle.
3. Disconnect the beverage outlet tubing from the top of the piercing head (A in Figure 4 on page 9).
4. Disconnect the gas inlet tubing from the bottom of the piercing head (C in Figure 4 on page 9).
5. Remove the two Allen-head screws that attach the piercing head support plate to the moveable
piercing unit.
6. Remove the two Allen-head screws that attach the piercing column to the piercing arm of the unit.
7. Remove the piercing head.
8. Tighten the new piercing head to the piercing arm of the unit with the two bolts. Make sure that
the Swagelok fittings points towards the inlet and outlet plastic tubes.
9. Tighten the new piercing head support plate to the moveable piercing unit with the two bolts.
10. Connect the gas inlet plastic tube to the bottom of the piercing head on the bottom black block (C
Figure 4 on page 9).
11. Connect the beverage outlet plastic tube to the top of the piercing head on the top black block (C
Figure 4 on page 9).
Connect the indicating instrument
The electrical connections for the indicating instrument are on the rear panel of the instrument. The
rear panel has a power connector for the power cable and a LEMO-10 connector for the O
2
, CO
2
or
N
2
sensor that is used with the beverage sampler. Refer to the indicating instrument documentation
for installation information.
Startup
C A U T I O N
Personal injury hazard. Glass components can break. Handle with care to prevent cuts.
Before measurements are started, do the steps that follow:
1. Make sure that the indicating instrument is correctly installed and configured. Refer to the
indicating instrument documentation.
2. Make sure that the connections between the indicating instrument and the sensor(s) on the
beverage package sampler are correct.
3. Always keep the indicating instrument energized to make sure that TC sensors are continuously
purged when the sensors are used in a liquid sample.
Note: The instrument is configured to continuously purge automatically while set to on.
4. Examine and prepare the sensors as follows:
a. Examine the oxygen sensor (EC). Shipping conditions can adversely have an effect on
oxygen sensors. Prepare the sensor for use. Refer to the maintenance section of the EC
Sensor documentation.
b. Examine the oxygen sensor (LDO). Prepare the sensor for use. Refer to the sensor
documentation.
c. Examine the TC sensor purge gas supply. Make sure that the gas supply operates before the
CO
2
or N
2
sensors are installed in-line. When the TC sensors are in touch with a liquid
sample, damage to the sensor can easily occur if the purge gas is not operative. Refer to
Connect the gas purge on page 10.
English 13