Agilent Technologies G3388B Installationshandbuch
Agilent Technologies
Agilent G3388B
Leak Detector
Operation
Manual
Notices
© Agilent Technologies, Inc. 2012
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
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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-
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ment shall control.
Safety notices
CAUTION
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.
3
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
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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