Milestone DMA-80 evo User manual

DMA-80
Quick Start Guide
SETUP YOUR DMA80 evo
Setting up your Milestone DMA-80 evo is simple.
Just follow the following instructions. Once com-
pleted the setup, take some time to read carefully
the User Manual MA213. After the switch on, login
as User or Administrator. In case of use of routine
methods, the User level is enough.
Preliminary steps:
2. Remove the protection foil on the top of the
oven plate.
4. Install the outlet adapter plate taking it from
the blue accessories case.
SG003-003• 2021-04
1. Remove the foam under the pneumatic arm.
3. Remove the strip and screw which holds the
ovens plate.
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8. Install the red cover plate of the amalgamator.
6. Remove the cap on the cuvette spout.
7. Install catalyst and amalgamator as described
in the user manual.
DMA-80 evo can operate with a voltage of 220-240 VAC or 110-120 VAC. From DMA-80 evo SN 20032968, the
voltage setting of the device is made by re-wiring the primary connections of the transformer.
5. Connect the Hg trap and ll the label with the
installation date.
The factory voltage setting on DMA-80 evo is 220-240 VAC. Follow this procedure every time the
input line voltage is dierent than value set on the unit.
An incorrect voltage setting of the unit can cause damages on the electrical components. Always
measure the inlet voltage on the power socket before proceeding with the voltage setting.
VOLTAGE SETUP
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2. Replace the two fuses from the holder with the
ones suitable for the inlet voltage:
- for 220-240 VAC: 2 x T6,3A
- for 110-120 VAC: 2 x T10A
The spare fuses are located in a bag in the blue
accessories case of the unit.
1. Press the two tabs on the sides of the fuse
holder of the plug and take it out.
1. Open the main cover of the unit in order to access the transformer. If you have a DMA-80 evo, you have
to pull the catalyst oven forward. First, be sure that the amalgamator is disconnected from the cuvette and
the horizontal pneumatic arm is out from the catalyst ange.
3. Install the fuse holder into the plug and press it
until the tabs engage.
Be sure the unit is turned o and the power cord is not connected.
1. FUSE REPLACEMENT
2. CHANGE THE CONNECTIONS ON THE VOLTAGE TRANSFORMER
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STARTING YOUR DMA80 evo
SYSTEM PAGE
You can check the system status using the system
page:
• All system temperatures
• Auto-sampler position under processing
• Total time and Sample time
• Voltage of Detector
• System status messages
METHOD PAGE – STANDARD METHOD
1. Connection of oxygen or air supply (4 bar pre-lo-
ad). Warm it up to 15 minutes.
2. Select the program or create a new one i.e. stan-
dard method for liquid and solid samples.
3. Select DMA Measurement/Meas./Result. Verify
the system is Hg free. In case run a couple of
blanks.
4. Weight (if neede), activate balance interface.
5. Test the oxygen or air ow before the opera-
tion (6/8 l/h). For testing, 10 ng Hg i.e. 100 µl of
100µg/L standard are dosed in the quartz boat.
6. Start the measuring by touching the Start icon
2. Change the wiring of the primary connection
of the transformer.
• for 220-240VAC: connect the white wire to
the 230V terminal
• for 110-120VAC: connect the white wire to
the 115V terminal
Push the oven back and cover the unit.
Connect the power cord to the unit, turn on the
machine and check its function.
Locate the labels designated to indicate the set
voltage inside the fuse bag.
Next to the power socket, replace or overlay the
existing labels, indicating the set voltage with
the new one.
3. INDICATE THE SET VOLTAGE WITH LABELS
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SIGNAL DISTANCE: 14 ± 2 SECONDS
The signal distance between both signals can be
adjusted by a slight change of the gas ow (move
the gas ow controller). Only if an adjusted and
constant gas ow occurs, the device can correct-
ly work. Therefore, also the inlet pressure value
should remain constant at 4 bar! The adjustment
takes place only one time. The signal distance
should be tested every day without any change.
Should the signal distance be signicantly wider,
there could be a leak in the area of the ange. For
testing, 10 ng Hg i.e. 100 µl of 100µg/L standard
are dosed in the quartz boat.
1.Calibration only after constant blank values,
i.e.<0.0030 (depending on the working range).
2. Create a new line in the measuring data and
mark this for the calibration with “C“ (see pictu-
re). Edit weight and concentration.
3. Under Measur./Link page introduce the de-sired
calibration data le. Here the measuring point is
registered. Before doing that, possibly create an
empty calibration data le.
The setting of calibration curves can be carried out with some mercury standard solutions. You shall dose 10
up to 100 µl in the quartz boats. Normally only a test per day is necessary for the calibration control check (i.e.
with 5ng Hg or Certied Material).
CALIBRATION OF HG CONCENTRATIONS
4. Measuring values are automatically assigned
to the appropriate cell.
5. New calibrated values are represented in red
color in the curve and must be conrmed by
their storage! Please, note that for values su-
perior to 5ng (Hg), a quadratic analysis is use-
ful. The values under 5ng (Hg) can be linearly
analyzed.
6. The curves could intersect the y-axis or going
through zero. (Not through x-axis>otherwise
false blind values). Not required calibration
points can be deactivated by removal (click) of
the blue ags.
IT IS NOT NECESSARY TO RECALIBRATE EVERY DAY. It is possible to use Reference feature (check
the User Manual)
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AVERAGE CALCULATION OF THE MEASURING
Touch behind the column Calc-Factor the emp-
ty eld. After that, will appear the sum symbol ∑.
All values marked with the symbol ∑are conside-
red for the average calculation (incl. standard de-
via-tion). The result is displayed in a separate line
below the measuring values. See an example in
the left picture.
In addition, it’s possible to assign groups, whose
statistical data can be therefore individually illu-
strated and printed.
The best way to clean the DMA-80 evo boats
is high temperature. You can both place them
10/15minutes in a Mue at 650°C or use the Clean
Procedure method with the DMA-80 evo.
Note: Quartz boats are used for liquid samples, ni-
ckel boats are used for solid samples. Don’t rinse
the nickel boats with any acids.
It consists of a glass tube lled with activated coal
and activated charcoal. Thanks to its pores, it can
absorb pollutants from air eliminating mercury,
chlorine, harmful gases and smells produced du-
ring the decomposition of the sample. Laborato-
ries and industries avoid reagents disposal and
chemists are protected from hazardous gases.
CLEANING AND MAINTENANCE
It’s advisable to drive some blind values after high Hg values. You can achieve a particularly fast clea ning by
measuring 0.3g of our plus 50µl of distill Water. The following measured blind val-ues should then obtain a
signal level of < 0.0030 Ext. (A) as required (referring Cell 1 sig-nal).
Replace catalyst and amalgamator after 5000 run (life time of consumable is variable according to the
sample matrices).
Important: keep the ange and fork clean with o-ring. Leaks caused by pollution cause false results! Black
sample waste products inside the ashing part of the catalyst can cause high blind values.
QUARTZ AND NICKEL BOATS CLEANING HG TRAP
Software screen shots are just examples that
don’t set any standard value to be reached.
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The following procedure is to be performed after replacing a new catalyst/amalgamator.
Replace catalyst and amalgamator after 2500/3000 runs (life time of consumable is variable according to the
sample matrices).
Note: before starting the procedure be sure that the catalyst/amalgamator is correctly installed, ali-
gnment of actuators and Oxygen or Air ow checked (for more details see operator manual).
*: quartz boat (suggested)
Repeat at 5 times the above procedure, up to absorbance < 0.0030 (consider the signal in Cell1)
After conditioning a stability test is required.
Repeat 5 times: a fresh aqueous standard of 100ppb, the RSD should be <3% (5% is still acceptable).
For this evaluation is not important the recovery but only the DMA stability so the previous calibration curve
can be used.
If the stability test is according to the specs, please proceed making new calibration (see user manual),
otherwise repeat the conditioning procedure again
Please refer to the video tutorial that you can nd at www.milestoneconnect.com
Go to www.milestoneconnect.com and discover our member’s contents: application
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CONDITIONING PROCEDURE FOR NEW CATALYST/AMALGAMATOR
DMA80 evo  PROCEDURE FOR CATALYST/AMALGAMATOR ACTIVATION
Step Reagent/sample type Sample amount
DMA-80 evo program (initialization method)
Drying time and
temp.(1) (2)
Decomposition time
and temp.(1) (2)
Purge/wai-
ting time
1°-2° B/V amalgamator - - - -
3°-4°-5° Blank
(without sample boat)
100mg
(indicative value)
ATC: 10sec/200°C +
120sec/200°C
ATC: 60sec/650°C +
120sec/650°C 60sec
6° * Common white our +
distilled H2O300mg+50mg ATC: 10sec/200°C + 120sec/200°C
ATC: 60sec/650°C +
120sec/650°C 60sec
7°-8° Blank
(without sample boat)
100mg
(indicative value)
ATC: 10sec/200°C +
120sec/200°C
ATC: 60sec/650°C +
120sec/650°C 60sec
9° * Common white our +
distilled H2O300mg+50mg ATC: 10sec/200°C + 120sec/200°C
ATC: 60sec/650°C +
120sec/650°C 60sec
10° Blank
(without sample boat)
100mg
(indicative value)
ATC: 10sec/200°C +
120sec/200°C
ATC: 60sec/650°C +
120sec/650°C 60sec
milestone
nnect
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