Design And Function; Function Description; Overview - Mettler Toledo QS3 Manual De Usuario

Injury due to sharp objects or broken glass
Instrument components, e.g., glass, can break and lead to injuries.
NOTICE
Damage to the instrument or malfunction due to the use of unsuitable parts
NOTICE
Damage to the instrument
The instrument contains no user-serviceable parts.
1 Do not open the instrument.
2 In the event of problems, please contact a METTLER TOLEDO representative.
NOTICE
Damage to the instrument due to inappropriate cleaning methods
If liquid enters the housing, it can damage the instrument. The surface of the instrument can be
damaged by certain cleaning agents, solvents, or abrasives.
1 Do not spray or pour liquid on the instrument.
2 Only use the cleaning agents specified in the Reference Manual (RM) of the instrument or the
3 Only use a lightly moistened, lint-free cloth or a tissue to clean the instrument.
4 Wipe off any spills immediately.

3 Design and Function

3.1 Function description

The QS3 sample changer can be used in conjunction with the Q3 dosing module and can be installed on any
XPR analytical balance. It contains 30 dosing positions (15 when used with sample vessels of diameter
larger than 31.5 mm), and therefore provides increased throughput of your dosing activities. The sample
changer can be used to dose liquids as well as powders. The dosing positions are covered by a tunnel draft
shield with two handles, on the right and left side of the weighing chamber. The top door of the balance is
replaced by a top panel especially designed to reduce the influence of air drafts on the weighing results.
Various adapter are available to accommodate a high variety of sample vessels. The vessels with adapters are
placed on the racks, which are in turn installed on the rotating drive ring. Each dosing position is numbered for
easy traceability. When dosing starts, the drive ring rotates and the dosing positions are brought one-by-one
over the weighing pan for dosing.
Simple weighings, adjustments, and tests can still be performed when the sample changer is installed. To this
purpose, a weighing pan cover and a weighing basket are provided with the instrument.

3.2 Overview

See the section "Overview" (graphics and legend) at the very beginning of this manual.
6
CAUTION
Always proceed with focus and care.
Only use parts from METTLER TOLEDO that are intended to be used with your instrument.
guide "8 Steps to a Clean Balance".
QS3 Sample Changer