22
BÜCHI
Fat Determination
B-820/B-821
4.9
Setting the correct gas flow rate
The gas pressures are electronically controlled, digitally
displayed and preset to a basic value by the manufacturer.
However, this basic value does not ensure the correct gas
flow rate and must be adjusted after preheating. Therefore,
measure the gas flow rate of the hydrogen and synthetic air
after first commissioning
the unit, and adjust the set
value if necessary.
The correct gas flow rate should be
checked periodically
at minimume when:
•
replacing the gas cylinder
•
replacing the separation column
•
carrying out service work
(see Section 5.2.6, "Gas flow setup“).
4.10 FID ignition
The ignition of the FID is carried out automatically. If required,
it can also be carried out manually by pressing key combination
«SHIFT» / «i».From the top of the FID look for red heating coil.
If the heating coil is defective, use a lighter to ignite the FID
flame.
4.11 Installation of Autosampler B-821
4.11.1 Unpacking and inspection
Autosampler B-821:
Your Autosampler B-821 is shipped and delivered to you in a
carton. To unpack proceed as follows:
1. Place the carton in a way to make sure the top side is up
(arrows).
2. Open and lift the top cover.
3. Use the two hand holes to lift the inner liner from the carton.
4. Do not overlook the syringe which is packed in a separate
small container.
5. Remove the transport protection (See Chapter 4.11.5).
Do not lift the Autosampler by the carousel support to avoid
damaging the hinge of the carousel support (see Figure 16).
Latch of carousel support). Lift only at the lower left and upper
right corners of the Autosampler.
4 Putting into operation
