Milestone DMA-80 evo Bedienungsanleitung

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

notes, tips and techniques, Milestone library, video tutorials, special oers, news, help

online and much more.

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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