Dräger Aerotest Alpha Bedienungsanleitung

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Aerotest Alpha

Contents

For Your Safety 12

What’s What 13

Description / Intended Use 14

Preparation 15

Use 16

After Use 18

Technical Data 18

Bubble Test 19

Storage 19

Troubleshooting 20

Maintenance Intervals 20

Order List 21

For Your Safety

Strictly follow the Instructions for Use

Any use of the breathing air tester requires full understanding and

strict observation of these instructions.

The breathing air tester is only to be used for the purposes speciﬁed

here.

Maintenance

The breathing air tester must be inspected and serviced by experts at

regular intervals and a record kept. Repair and general overhaul of

the breathing air tester may only be carried out by trained service

personnel. We recommend that a service contract be obtained with

Dräger Service and that all repairs also be carried out by them.

Only authentic Dräger spare parts may be used for maintenance.

Observe chapter “Maintenance Intervals”.

Liability for proper function or damage

The liability for the proper function of the breathing air tester is

irrevocably transferred to the owner or operator to the extent that the

breathing air tester is serviced or repaired by personnel not employed

or authorized by Dräger Service or if the breathing air tester is used in

a manner not conforming to its intended use.

Dräger cannot be held responsible for damage caused by non-

compliance with the recommendations given above.

The warranty and liability provisions of the terms of sale and delivery

of Dräger are likewise not modiﬁed by the recommendations given

above.

Dräger Safety AG & Co. KGaA

What’s What

1Carrying case

2Special Dräger tubes®

(4 sets of 10 units)

3Lock coupling

4Tube opener for breaking off tube ends

5Timer

6Plug fitting

7Bubble test

8O2pressure regulator with outlet

pressure gauge

9Measuring unit with four tube holders

00121437.tif

4568 7

Description / Intended Use

The Dräger Aerotest Alpha determines the quality of the breathing air

delivered by a low pressure system (compressor, compressed air

cylinder or compressed air network). The maximum supply pressure

at the device inlets is 15 bar. Dräger tubes®are used for the

measurements.

The levels of the following substances can be measured:

— Oil

— Carbon dioxide (CO2)

— Carbon monoxide (CO) and

— Water vapour (H2O).

These four values can be deﬁned either simultaneously or individually.

The measurement precision remains constant regardless how many

tube holders are loaded. By contrast, the assigned functions of the

Dräger tubes®/ tube holders must be taken into account. In other

words, in order to check e.g. the oil content of the breathing air, the

oil tube must be loaded in the appropriate holder marked “oil“.

The permissible limit values are deﬁned in EN 12 021 (Compressed

air for breathing apparatus).

Measuring Unit: Pos. 9

The measuring unit needs a supply pressure of 3 bar.

Pressure Control Valve: Pos. 8

The pressure control valve is preset to 3 bar of relief pressure.

When the supply pressure changes from 3 to 15 bar, the relief pres-

sure (3 bar) at the handwheel of the pressure control valve must be

readjusted. Check via the pressure gauge.

All the components required for measurement are housed in a handy

carrying case.

Preparation

●Clean the compressed air supply connection by blowing it clear.

●Clean the measuring unit. It must be free of particles and dust.

●Check pass-through of the measuring unit (see page 23).

1Connect the measuring unit to the compressed air supply

connection. The maximum supply pressure is 15 bar. If necessary,

use the adapter.

Outlet pressure 3 bar adjustable at the pressure-reducing valve

with pressure gauge.

●Slowly open the compressed air supply valve and flush the system

(allow compressed air to be exhausted through the system).

Flushing time for a regularly maintained system:

2 to 3 minutes.

For other systems:

5 to 6 minutes.

●Then close the valve.

●Set the timer: 5 minutes.

Strictly follow the specific Instructions for Use.

00321437.e

Oil CO H2OCO2

Use

●Cut off both ends of the “Oil 10/a-P“

tube, using the tube opener. Proceed as follows for both ends:

1Insert the tube as far as it will go into the middle hole and turn once

or twice. The glass will be scratch-marked.

2Push the scratched end into the outer hole. The end breaks off and

falls into the container.

Attention!

The broken tube ends have sharp edges.

Risk of injury.

00421437.e

1Insert the tube in the “Oil“ tube holder of the measring unit. The

arrow on the tube indicates the direction offlow (i.e. arrow must

point away from the measring unit).

Use only Dräger tubes®– see “Order List” on page 25.

2Break off both ends of the “Carbon dioxide 100/a-P“ tube and

insert it in the “CO2“ tube holder of the measuring unit.

3Break off both ends of the “Carbon monoxide 5/a-P“ tube and

insert it in the “CO“ tube holder of the measuring unit.

The “Water vapour 20/a-P“ tube requires special handling:

●Break off the outlet end of the tube.

●Scratch-mark the inlet end of the tube with the tube opener, wit-

hout breaking it off.

●Slowly open the compressed air supply valve.

4Insert the outlet end of the “Water vapour 20/a-P“ tube in the

“H2O“ tube holder of the measuring unit.

●Break off the inlet end in the air stream and simultaneously insert

it in the tube holder.

●Start the timer.

After the test time has elapsed:

●Close the compressed air supply valve. Remove the Dräger tubes

from the tube holder and evaluate the relevant levels with the aid

of the Instructions for Use of the Dräger tubes®.

Start by reading off the “Water vapour 20 /a-P“ tube.

NOTE

Do not inhale the gases released during measurement.

00521437.e

Oil CO H2OCO2

1 2 3 4

After Use

●Dispose of all used tubes and of the broken tube ends in the tube

opener in accordance with the Instructions for Use of the tubes.

●If necessary:

Clean the container of the tube opener and the tube holder with

clean water (only the lower, outlet end) and dry.

Technical Data

Carrying case

Dimensions (length x width x height) 350 x 300 x 85 mm

Colour black

Weight (with full contents) approx. 2 kg

Measuring unit

Dimensions (length x width) 100 x 38 mm

Height including

tube holder 230 mm

Connection for compressed air supply Press-ﬁt nipple, 9 mm

Supply pressure

Minimum 3 bar

Maximum 15 bar

Volumetric ﬂow

Factory-set at 3.0+0.5 bar

For CO and CO2tubes 0.2 litres per minute

For Oil and H2O tubes 4 litres per minute

Adapter 1

Inlet Press-ﬁt coupling, 9 mm

Outlet External thread G 1/4

Adapter 2

Inlet Internal thread G 1/4

Outlet Press-ﬁt nipple, 12 mm

Environmental conditions 15 oC to 25 oC

1013 mbar

Bubble Test

The bubble test is used for the control of the measuring unit, see

“Maintenance Intervals” on page 24. It is tested whether volumetric

ﬂow rate is guaranteed within the measure or a pollution and/or blok-

kage is available.

1To this is the delivered bubble test hose plugged into the to be te-

sted connection of the measuring unit.

2The other end of the bubble test hose is dipped into a water filled

receptacle.

3With assistance of the timer, the ascending bubbles are counted:

CO2and CO connection, countable blistering

(e.g. 40 blow in 15 sec.).

Oil and H2O connection, large blistering (not countable).

Storage

Store all parts dry, free of deformation, in a cool and dust-free place.

Protect against direct light and heat sources.

Strictly follow the “Guidelines for the storage, maintenance and

cleaning of rubber products“.

00221437.e

Oil CO H2OCO2

Troubleshooting

Fault Cause Remendy

Leaky compressed air

connection

Defective sealing

ring

Check the sealing

ring and replace if

necessary

Tube not ﬁrmly seated

in the tube holder

Tube holder worn Replace the tube

holder

Tube end not cleanly

scratch market and

broken off

Tube opener blunt Replace the tube

opener

Major measurement

fault

Tube inserted in

wrong holder

Check

Tube holder dirty or

loose

Clean or replace the

tube holder

Wrong volumetric

ﬂow, because the

feed system is

blocked

Unscrew the tube

holder from the

measuring unit and

blow the feed insert

clear from both

sides with

compressed air

O2pressure regulator Relief pressure

deviating from 3 bar

Readjust on 3 bar

relief pressure

Maintenance Intervals

Device component Maintenance work

required

before each use

after each use

every six months

every year

Test tube holder Clean X

Test tube Check date of use XX

Measuring device Check volume ﬂow X*)

*) By Dräger Safety.

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