Energizer PORTABLE GAS DETECTION INSTRUMENT Spécifications télécharger pdf (Page 8)

How to Perform a Gas Test

1. Ensure the G-TECTA™ 4GP instrument is switched

on and in normal operating mode.

2. Fit the ﬂow cap onto the front of the sensors and

attach the hose from the regulator. Attach the

outlet hose to ‘vent gas away’ – do not extend

this hose, restrict or allow kinks.

3. Swipe the Gas Test Key past the display, adjacent

to the LED lens. The G-TECTA™ 4GP will activate

the Gas Test Mode and show “TEST” and “x” next

to the sensors on the display.

4. G-TECTA™ 4GP will display a progress bar.

5. Apply the gas whilst the progress bar

is counting down.

6. Wait for the progress bar to complete

(40 seconds). G-TECTA™ 4GP will display a

“3” or “x” against each sensor and a master

“3” or “x” to indicate PASS or FAIL

In the event G-TECTA™ 4GP displays FAIL, please

see the troubleshooting guide (Page 17) or

contact The Linde Group.

7. To abort the gas test press the mode button at

any time whilst the test is in progress.

Instrument Calibration

Calibration of the gas sensor should be performed

regularly every 6 months. Over time the accuracy of

the gas sensor can drift outside of what is considered

a safe range and regular calibration is essential to

ensure accuracy of gas readings.

W A R N I N G



The accuracy of G-TECTA™ 4GP

instruments should be checked periodically with

known-concentration of calibration gas. Failure to

check accuracy can lead to inaccurate and potentially

dangerous readings

There are three methods of instrument calibration

available. G-TECTA™ 4GP calibration can be

performed directly on each instrument (one button

calibration), by utilising G-TECTA™ PC software or by

using the Linde G-DOCKA™ Hub. Certiﬁed calibration

gases should be used.

How to Perform a One Button Calibration Test

1. Ensure you are in clean air and the instrument

is in normal operating mode. Double click the

mode button and select “Zero” from the options

menu by double clicking on the “Zero” icon.

G-TECTA™ 4GP will perform an Auto Zero.

To perform a one button calibration,

complete the next steps within 15 minutes

of completing the Auto Zero.

2. Fit the ﬂow cap onto the front of the sensors and

attach the hose from the regulator. Attach the

outlet hose to ‘vent gas away’ – do not extend

this hose, restrict or allow kinks.

3. Swipe the Gas Test Key past the display, adjacent

to the LED lens. The G-TECTA™ 4GP will activate

the Calibration Mode and show “CAL” and “????”

on the display.

4. Press the mode button within 10 seconds to

conﬁrm calibration.

Note: If the mode button is not pressed within

10 seconds then the instrument mode will change to

Gas Test Mode.

5. G-TECTA™ 4GP will display a progress bar and an

“x” will appear against each gas type.

6. Apply the gas whilst the progress bar is

counting down.

Note: You can abort the calibration test by

pressing the mode button at any time whilst

the test is in progress.

7. The G-TECTA™ 4GP instrument will adjust the

value on the gas sensor to match the stored

calibration gas value within the sensor module.

8. G-TECTA™ 4GP will display a “3” or “x” against

each sensor to indicate PASS or FAIL.

9. If any of the G-TECTA™ 4GP sensors do not

calibrate successfully, the gas type will remain

marked with a “x” and the warning messages

“Gas Test Failed” and “Send for Calibration” will

be displayed. The G-TECTA™ 4GP must be sent

to a Linde Group Authorised Service centre for

re-calibrating or sensor replacement.

Note: Gas Test pass and fail, and calibration

pass, fail and values are stored in the Event log.

Note: Some sensors may not be calibration enabled.

Oxygen sensors are by default not calibration

enabled as they are calibrated in fresh air by zeroing.

W A R N I N G



One button calibration will

check for small drifts of stored calibration value.

The Linde Group recommends G-TECTA™ 4GP is sent

for full certiﬁed calibration at six monthly intervals.

G-TECTA 4GP Instrument with

Ozone (O

) Sensor

Due to the reactive nature of ozone (O

) special

procedures should be followed when calibrating gas

detectors that incorporate an ozone sensor.

Fittings

For ozone calibrations all ﬁttings and pipe work

should be stainless steel, brass, aluminium or PTFE.

Fittings or pipe work in other plastic materials such

as Tygon must not be used.

Gas ﬂow rate

It is important that the ﬂow rate is set correctly as

otherwise pressure effects may distort calibration

values and prevent the gas detector from working

correctly. To calibrate, the ﬂow rate should be set

between 0.8-1.0 litres/minute (0.03-0.04 cubic

feet/minute)

Normal safety precautions for handling ozone

should always be observed along with any special

instructions that accompany the calibration gas

cylinder or generator being used.

For calibrating the ozone sensor, the special ﬂow

cap assembly with four inlets (article number

AS4GP3021) must be used. The Ozone sensor must

always be at position 3, as marked on the ﬂow cap.

Note: The standard ﬂow cap assembly supplied with

the instrument must be used for calibrating the other

gas sensors

* G-TECTA™ PC Software can be downloaded free of charge from www.g‑tecta.com

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Energizer PORTABLE GAS DETECTION INSTRUMENT Spécifications Page 8

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