Metalyser
®
Portable HM1000
Instruction Manual
v 5.0
6. ADDING A STANDARD ADDITION
When
prompted, a 20ppb
Standard
Addition needs to be added to the
SAB.
This
is
achieved
by using the pipette
(which
is set to
280µl).
The
20ppb
default
setting can be changed by pushing the joystick left and right.
Each
140µl
increase
on the pipette is
equivalent
to 10ppb.
On the
handheld,
when prompted to add 20ppb of a
particular element(s)
then the
highlighted value
of 20ppb can be
altered
by pushing the joystick to the left and to the
right. If the user wants to
measure higher levels
then a
higher value
closer to the
concentration level
will be
required. The accuracy
will
increase
the closer the Standard
Addition is to the actual
concentration.
For
example,
an unknown
sample
is expected to
be around
15ppb
then a
20ppb standard
in this
case
is sufficient.
If
the user
expects
the
analysis
to be 100ppb then, for
example,
a 120ppb standard would be
suitable.
How to use a pipette
1.
Place
a
clean
pipette tip on the pipette
2.
Select
the
volume required
by twisting the dial at the top of the pipette
3. Hold the pipette vertically with the hand wrapped around it and the thumb on
the button at the top; press
the
button down gently to the first stop.
4.
Place
the pipette tip in the standard bottle just underneath the top of the
liquid
and
slowly release
the plunger
5. Move the pipette to the SAB and locate the pipette tip through the hole in the
SAB
6.
Push
the
plunger all
the way down to the second stop and hold then
slowly
withdraw the pipette tip from the SAB
7. To
release
the pipette tip after use, push the white button at the side of the
pipette
Before carrying out testing, become familiar using the pipette and the two
different stops on the plunger to ensure the correct volume of standard is added.
1. 2. 3. 4. 5. 6. 7.
M
x
Std
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