Agilent Technologies G3388B Manuel d'installation

Agilent Technologies

Agilent G3388B

Leak Detector

Operation

Manual

Notices

No part of this manual may be reproduced

in any form or by any means (including

electronic storage and retrieval or transla-

tion into a foreign language) without prior

agreement and written consent from Agi-

lent Technologies, Inc. as governed by

United States and international copyright

laws.

Manual Part Number

G3388-90005

Edition

First edition, June 2012

Printed in Japan

Agilent Technologies, Inc.

2850 Centerville Road

Wilmington, DE 19808-1610 USA

Warranty

The material contained in this document

is provided “as is,” and is subject to

being changed, without notice, in future

editions. Further, to the maximum extent

permitted by applicable law, Agilent dis-

claims all warranties, either express or

implied, with regard to this manual and

any information contained herein, includ-

ing but not limited to the implied warran-

ties of merchantability and fitness for a

particular purpose. Agilent shall not be

liable for errors or for incidental or con-

sequential damages in connection with

the furnishing, use, or performance of this

document or of any information contained

herein. Should Agilent and the user have

a separate written agreement with war-

ranty terms covering the material in this

document that conflict with these terms,

the warranty terms in the separate agree-

ment shall control.

Safety notices

CAUTION

A CAUTION notice denotes a

hazard. It calls attention to an

operating procedure, practice, or

the like that, if not correctly

performed or adhered to, could

result in damage to the product or

loss of important data. Do not

proceed beyond a CAUTION notice

until the indicated conditions are

fully understood and met.

WARNING

A WARNING notice denotes a

hazard. It calls attention to an

operating procedure, practice, or

the like that, if not correctly

performed or adhered to, could

result in personal injury or death.

Do not proceed beyond a

WARNING notice until the

indicated conditions are fully

understood and met.

Agilent G3388B Leak Detector

Operation Manual

Agilent Technologies

The G3388B Leak Detector

Introduction 4

Specifications 7

Operation 9

General information 9

Displays 10

Detecting leaks 12

Setting options 13

Maintenance 16

4 G3388B Leak Detector

Introduction

The Agilent Technologies G3388B Leak Detector is a

portable, highly sensitive instrument designed to detect

helium and hydrogen gas leaks in gas chromatographs

(GCs) and their accessories, such as purge and trap

systems. The detector finds leaks by comparing thermal

conductivity between the ambient atmosphere and a

target gas. The detector indicates leaks through a dual

system that consists of an indicating LCD and an

audible alarm. The detector is more reliable and

convenient to use than soap solutions and is capable of

detecting even the smallest, hard-to-reach gas leaks.

Figure 1 and Figure 2 show the controls and other parts

of the meter.

Figure 1 Front view of the meter

LED indicator

LCD display

FUNC/POWER key

ZERO/ENTER key

Reference port

Sample probe

Charging

terminal

Sampled gas inlet

G3388B Leak Detector 5

Figure 2 Back view of the meter, and USB cable

Use the Agilent Leak Detector only for detecting gases.

Never allow liquids or particles to enter the sample

probe or reference port.

The G3388B is not a quantitative device. It is designed

to detect leaks in gas line connections commonly

associated with laboratory equipment.

Strap eyelet

(Strap not included.)

Reference port

USB cable

(for charging battery)

6 G3388B Leak Detector

CAUTION

•Do not expose the detector to shock, wet

environments, or solvents.

•Do not use the detector at temperatures outside

its specified operating range.

•Do not open the detector’s body.

•Do not use the detector to detect corrosive gases.

•Do not block the reference port (fresh air inlet) at

the top of the detector.

•The detector’s sensitivity will be adversely

affected if it is used in an area containing the

leaking gas.

•Detector sensitivity can be affected by wind.

•Do not use the detector’s micro USB cable for

other devices.

•During use, keep the detector temperature stable.

Do not use the detector while charging. Allow the

detector temperature to stabilize (cool) for 30

minutes after charging.

WARNING

• Do not use the detector in areas at risk for fire,

explosion, or large leaks of flammable gas.

• When detecting small leaks of flammable

gases, make sure sufficient ventilation exists to

prevent a fire hazard.

• Do not use the detector in environments that

may be potentially contaminated with dust or

combustible fumes.

• Do not use the detector as safety equipment.

• This leak detector must not be used in Classified

(Hazardous) locations. Use of this leak detector

in a hazardous location could lead to personal

injury or death.

• The customer may not replace the battery. The

customer must return the leak detector to an

Authorized Agilent Repair Center for repair.

G3388B Leak Detector 7

Specifications

Detector: Thermistor-actuated thermal conduc-

tivity cell

Thermal conductivity of

gases:

He, CO2, Ar, Ne, and so forth (at 0 °C,

nonflammable, noncorrosive atmo-

sphere)

Sensitivity: Selectable in two ranges:

Std range: Helium 0.005 mL/min in

atmosphere

Hi range: Helium 0.0005 mL/min in

atmosphere

Battery: Rechargeable lithium-ion battery

Charging time < 2.5 h

Continuous operation: 5 hours (with a new, fully charged bat-

tery, standard range, LED off, Buzzer off,

Backlight off)

Display: LCD display with 8 bar graphs

8 LED lamps

Recharger: USB cable, part number G3388-80000

Operating temperature

range:

10 to 40 °C (noncondensing)

Overall size: 50 mm (W) × 19.5 mm (D) × 111 mm (H)

Net weight: 95 grams (approximate)

8 G3388B Leak Detector

The sensitivity depends on the relative thermal

conductivities of the target gas and the ambient

atmosphere (typically air). The larger the difference, the

greater the sensitivity. See Table 1.

Table 1 Thermal conductivities of common gases at 0 °C,

1atm

Gas Thermal conductivity

(mW/m•k)

Hydrogen 168.2

Helium 142.2

Neon 46.5

Methane 30.2

Air*

* Not detectable

24.1

Nitrogen*24.0

Ethane 18.0

Ethylene 16.4

Argon 16.3

Carbon dioxide 14.5

Krypton 8.7

Xenon 5.2

G3388B Leak Detector 9

Operation

General information

To determine whether a GC or a GC accessory is leaking

gas, place the Agilent Leak Detector’s sample probe

near the suspected leak. Make sure that the sample

probe remains open during leak detection. Be careful

not to place the probe’s tip against the connection or

fitting that you are checking.

Protect the detector from vibration while it is operating.

Periodically replace the filter (part number

G3388-80001) that is attached at the inlet of the sample

probe. See “Replacing the filters” on page 17.

NOTE

Before first use and after a long period of disuse, fully

charge the battery. See “Charging the battery” on

page 16.

NOTE

Be aware that the detector will give a positive response

to water vapor, for example to skin vapor and to fittings

that were recently leak checked with a soap solution.

10 G3388B Leak Detector

Displays

Warmup display: At startup, the detector warms up for

25 s when set for standard range, or 90 s when set for

high range sensitivity. Press [ZERO/ENTER] to skip

warmup.

After warmup, the detector is ready for use.

Standard and high range displays:

Range

Leak

indicator

(LED)

Battery indicator

Leak indicator (LCD)

R_Std

Leak

indicator

(LED)

Range

R_Std Standard sensitivity range

R_Hi High sensitivity range (10 times more sensitive

than standard range)

Battery indicator

The Battery indicator shows the battery charge level in 3 levels.

3 bars Ample charge. Greater than 50% charge

remaining

2 bars Low charge. Battery charge about 20–30%.

1 bar Very low charge. Battery charge required. About

10 minutes of use remaining.

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