Powder Dosing; Using Dosing Heads Without A Vial; Filling The Vial Of A Powder Dosing Head; Storing Powder Dosing Heads - Mettler Toledo Q3 Manual De Usuario

5.4 Powder dosing

5.4.1 Using dosing heads without a vial

Most powder dosing heads can be used with or without a
vial, since the neck of the dosing head can accommodate a
certain amount of powder. Using dosing heads without vials
is particularly relevant when dosing very small quantities. In
this case, the dosing head needs to be closed using the
provided spare cap (1). The neck (2) of the QH002, QH008,
QH010, and QH012 dosing heads have a capacity of 2 ml,
8 ml, 10 ml, and 12 ml, respectively.

5.4.2 Filling the vial of a powder dosing head

Software functions to easily fill or refill the dosing head are available through the terminal of the balance.
Consult the Reference Manual of the balance for more information.
A method General weighing is running on the terminal.
The dosing head is removed.
1 Turn the dosing head upside down.
2 If the attached vial already contained power, gently tap on it to let the remaining powder flow back into the
vial.
3 WARNING: Injury or contamination from hazardous substances. Take the appropriate measures to
avoid injuries and contamination.
Unscrew the vial.
4 Place the vial on the weighing pan.
5 Press
6 Fill the vial with the desired amount of the appropriate substance.
7 Note down the weight of added substance.
8 Remove the vial from the weighing pan.
9 Holding the vial upright and the dosing head upside down, screw the dosing head onto the vial.
10 Turn the dosing head upright and gently tap on it to let the powder flow towards the dosing head.
11 Install the dosing head on the dosing module.
12 On the terminal, edit the settings of the dosing head to include the added amount of powder.

5.4.3 Storing powder dosing heads

For short-term and long-term storage of the powder dosing
heads, METTLER TOLEDO recommends using storage
containers to:
reduce the risk of contamination
reduce the quantity of humidity absorbed by the powder
You can store the dosing heads right-side up (1) or upside-
down (2).
20
to tare the balance.
1
2
2
1
Q3 Dosing Module