Schele Electronic GA-S1 User manual

User manual

Portable analyzer GA-S1

for O2 and CO2

Version 2015-5

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Version 2015

INDEX

OVERVIEW IMAGES

Image 1: Calibrating gas connection with the included hose ...................................................................7

Image 2: Connection of calibrating gas with a testing bottle ....................................................................8

OVERVIEW TABLES

Table 1: Automatic charger ....................................................................................................................18

Table 2: Spare parts...............................................................................................................................18

1. INTRODUCTION.............................................................................................................................. 3

1.1 ABOUT THIS MANUAL................................................................................................................... 3

1.2 EXPLANATION OF THE SYMBOLS .............................................................................................. 3

1.3 RANGES OF MEASUREMENT....................................................................................................... 3

1.4 CONTACT........................................................................................................................................ 4

2. GUARANTEE................................................................................................................................... 4

3. HANDLING....................................................................................................................................... 4

4. ANALYZER START UP................................................................................................................... 5

4.1 CHECKING THE ANALYZER ......................................................................................................... 6

5. CONTROL PROCEDURE................................................................................................................ 7

6. CALIBRATION................................................................................................................................. 9

6.1 CALIBRATING THE O2SENSOR WITH ZERO % - GAS (NITROGEN)........................................ 9

6.2 CALIBRATING THE CO2SENSOR WITH REFERENCE GAS.................................................... 10

6.3 CALIBRATION OF FRESH AIR.................................................................................................... 10

7. SAVE AND RELOAD DEFAULT SETTINGS................................................................................ 12

7.1 SAVE DEFAULT SETTINGS......................................................................................................... 12

7.2 RESET TO DEFAULT SETTINGS................................................................................................. 12

7.3 RESET TO FACTORY SETTINGS................................................................................................ 13

8. BATTERY....................................................................................................................................... 14

8.1 GENERAL...................................................................................................................................... 14

8.2 USER MANUAL BATTERY........................................................................................................... 14

9. DISPLAY OPERATING TIME........................................................................................................ 17

10. TECHNICAL SPECIFICATIONS ................................................................................................... 18

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1. Introduction

This user manual applies to the following company group:

Schele Electronic UG & Co KG

1.1 About this manual

This manual contains instructions about how to work with the portable analyzer of Schele Electronic in

order to lead to safe and efficient operations.

Please read the entire manual carefully before starting up the portable analyzer.

1.2 Explanation of the symbols

In this user manual, this symbol stands for all instructions and regulations related to

your safety and the safety of any third party.

You find this symbol at important instructions and information for trouble-free operations and

a correct usage of the portable analyzer.

1.3 Ranges of measurement

0-25% O2and 0-10% CO2

0-25% O2and 0-30% CO2

The range of measurement is dependent on the type of analyzer you purchased.

The portable analyzer is meant to measure oxygen (O2) and/or carbon dioxide (CO2)

in cold stores for fruits and vegetables. The O2 sensor type used is not suitable for

cold stores where the CO2is removed through chalk.

This O2sensor is particularly suitable for stores treated with an active carbon

scrubber.

Attention!

Hydrocarbons can influence the measurement of the oxygen sensor.

These hydrocarbons are not removed by chalk.

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1.4 Contact

For questions and remarks you can contact:

Schele Electronic UG & Co KG

Antoine Schele

Zum Brachsen 3/2

88662 Überlingen

Germany

Tel: +49 (0)7551 7211

Fax: +49 (0)7551 9499994

E-Mail: info@schele-electronic.de

2. Guarantee

When using the portable analyzer appropriately as described in this user manual the guarantee period

is 12 months.

3. Handling

ON: Switch on (Push 2 seconds)

OFF: Switch off

Function keys:

F0: Changing company name at startup

F1: Empty

F2: Start calibration

F3: Configuration (is not described)

F4: Operation time

The function of the keys F1-F4 are dependent on

the chosen screen

The current functions are displayed at the screen

bottom

RET: Confirmation settings

Arrow keys:

 Scrolling or adjusting a setting

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4. Analyzer start up

The portable analyzer is switched on at the “ON” button (Push for 2 seconds).

At the same time an air pump is switched on. This pump is responsible for the suction of

the gas sample.

For a reliable measurement, please observe the minimum warm-up time in the

lower right corner of the display until the word “READY” is displayed in the lower left corner

Since the analyzer sucks in the gas sample autonomously, do not insert gas under pressure into the

analyzer. The gas sample must not contain any water at all.

To protect the sensors a dust/dirt/moisture filter is included in the delivery.

A new hydrophobic filter can be ordered separately, see Table 2: Spare parts.

After warming up the screen will display the current O2and/or CO2measurement:

CO2 = trend upwards

O2 = trend downwards

READY= ready for use

OK Battery full indication

LA Battery low indication

0: 4: 23 = Operating time [h:mm:ss] is 0 hours 4

minutes 23 seconds

Never work with the analyzer without this hydrophobic filter.

The analyzer has to be recharged with the battery charger included in the

delivery. Take care that the built-in battery is always completely recharged.

Charge battery only at a temperature higher than 5 °C.

During a long time of inactivity, charge battery onto 40% and recharge it to

this level every 2 to 3 months. This avoids a deep discharge of the battery

which could lead to a breakdown of the battery.

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4.1 Checking the analyzer

All portable analyzers are being calibrated before delivery.

To carry out and obtain reliable measurements the analyzer has to be checked regularly. This can be

done by comparing the values of the analyzer with a calibrating gas, see chapter 5: Control procedure.

If the given values on the display do not match with the values of the calibrating gas, calibration is

necessary, see chapter 6: Calibration.

In the event of no sample gas suction, the suction hoses and the connected filter have to be checked.

The filter could be blocked, in which case it has to be replaced.

The user is entirely responsible if the user carries out calibration himself.

In this case, Schele Electronic cannot be held to account for any damages.

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5. Control procedure

Please carry out the control procedure only outdoors, since the effluent gas can be a health

risk for every person located in a closed room.

First turn the portable analyzer on.

For the inspection of the analyzer, calibrating gases are needed.

Because gas must not be inserted under pressure, the feeding hose of the calibrating gas

bottle has to be interrupted.

It is recommended to use the included hose for this process, see image 1.

Image 1: Calibrating gas connection with the included hose

To ensure no fresh air or other gases from outside the analyzer are able to enter into the hose, it is

important that more gas flows into it than the analyzer can suck in. This can be identified by gas

escaping the open connector.

Alternatively a small plastic or glass bottle can be used, from which the analyzer can draw a gas

sample through another hose by itself, see Image 2.

The quantity of gas in the bottle has to be a bit larger than the quantity drawn by the analyzer to avoid

air from the outside from entering, see

Image 2: Connection of calibrating gas with a testing bottle. This can be identified by gas escaping the

testing bottle.

The plastic or glass bottle with a neck diameter between 20 and 30 mm has to be

absolutely clean and dry on the inside.

There must not be any dust or moisture inside the bottle.

For a reliable measurement, please observe the minimum warm-up time in the lower

right corner of the display until “READY” is displayed in the lower left corner

Connection to calibrating gas

Fresh air supply

Connection to analyzer

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CO (5%)

O (1%)

MAX. 2L/min. Aansluiten op handmeter

Connection of portable analyser

Anschlu am tragbare Me ger teßäß

Raccordement Surl’analyseur portable

Image 2: Connection of calibrating gas with a testing bottle

Connection to analyzer

escaping calibrating gas

testing bottle

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6. Calibration

Please carry out the calibration only outdoors, since the effluent gas can be a health risk for

every person located in a closed room.

Like in chapter 5: Control procedure you have to use calibrating gas to calibrate the analyzer. During

calibration two calibration points are set for both sensors (O2and CO2), “low” and “high”.

Sensor

Point

Used medium

Value

Low

Calibrating gas (i.e. nitrogen)

0,0%

High

Fresh air

20,9%

CO2

Low

Fresh air

0,04%

High

Calibrating gas (CO2)

5,0%

From these calibration points a linear gradient emerges which offers a reliable measurement.

For a reliable measurement, please observe the minimum warm-up time in the lower right

corner of the display until “READY” is displayed in the lower left corner.

6.1 Calibrating the O2sensor with zero % - gas (nitrogen)

Open calibration menu by pressing function key F2 (CALIB)

For O2sensor press function key F2 (O2)

Press function key F3 (REF 0%)

Connect nitrogen (zero gas O2=0% N2=100%), see image 1 or 2

Press function key F4 (NEXT)

oCalibration can be interrupted by pressing function key F1 (EXIT)

If the measured value is stable, save the value with function key F4 (SAVE)

To stop the calibration press function key F1 (EXIT)

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6.2 Calibrating the CO2sensor with reference gas

Open calibration menu by pressing function key F2 (CALIB)

For CO2sensor press the function key F3 (CO2)

Press function key F3 (REF %)

oIf necessary, adjust the CO2reference value with function key F3 (SETVAR) and the arrow

keys 

oWhen the value is changed, close with key RET

Connect the reference gas, see Image 1 or 2

Press function key F4 (NEXT)

oCalibration can be interrupted by pressing function key F1 (EXIT)

If the measured value is stable, save the value by pressing function key F4 (SAVE)

To stop the calibration press function key F1 (EXIT)

6.3 Calibration of fresh air

Open calibration menu by pressing function key F2 (CALIB)

Press function key F4 (F.AIR)

If you use the included hose:

oClose the valve of the calibrating gas

If you use the testing bottle:

oTake out the hose connected to the analyzer of the bottle

Press function key F4 (NEXT)

oCalibration can be interrupted by pressing function key F1 (EXIT)

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