CMM USER'S MANUAL (E2.51)
22
3
INITIALIZATION
3.1 Adding Hg to test gas generator
3.1.1 Precautions for safe handling
Read the mercury safety data sheet and act accordingly
.
3.1.2 Adding metallic mercury to test gas generator
Before starting to use the system for mercury measurements, it is required to add atomic mercury to
the test gas generator. Atomic mercury is used to calibrate the system daily. Work at sufficient well-
ventilated room temperature (or below) and u
se the protective equipment listed in the mercury safety
data sheet.
1.
Remove the heated line and pull the test gas generator (lower unit) out of the cabinet (shelf slides
out).
·
For safety reasons the power cable should always be removed from the test gas
generator, when its cover is opened!
2.
Remove the cover of the test gas generator by removing screws from case’s ends and sides by 3
mm Allen key. The bottom screws of the front and rear panels need not to be removed.
3.
The mercury compress is located on the front of the test gas generator from the front view, right.
Open the grey enclosure of the mercury compress by removing four screws. Use 3 mm Allen key.
4.
Open the mercury compress by using 2.5 mm Allen key.
5.
Inside the compress is a U-shape glass tube (Figure 6 and Figure 7.). Remove the tube carefully
and fill it with mercury according to Figure 6 below. Use pipette and pipette bulb. It is important
that the level of mercury is above the top of the bend.
3.1.2.1
PRACTICAL TIPS FOR FILLING
Note, do always according to the safety data sheet / laws / factory rules or instructions etc., if any
·
It is a good idea to fill of the U-shape glass in a low-edged plastic box, so if any mercury
drops, they will not harm the device. (
Figure 11
)
·
It is a good idea to put a sealed garbage bag and hand towels next to the filling place. If
any work equipment etc. are contaminated, they can be thrown into the bag.
·
Put the U-glass for example on the insulation nozzle (
Figure 11
)
·
Fill the glass only a little at a time, as mercury easily rises up into the pipette bulb and
then you have to throw it in the garbage. (
Figure 10
and
Figure 9
.)
·
If you accidentally fill up too much, tilt the glass and then take the mercury off by using
pipette. Mercury can be put back in the bottle. (
Figure 8
.)
