▷ Agilent Technologies G3388B Manual, Agilent Technologies Security Sensors G3388B Operation Manuals (20 pages) |

Notices © Agilent Technologies, Inc. 2022 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 2022 Printed in Japan Agilent Technologies, Inc. 2850 Centerville Road Wilmington, DE 19808-1610 USA Warranty The material contained in this document …

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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
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Agilent Technologies G3388B 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 reli…

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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)
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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 le…

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Agilent Technologies G3388B G3388B Leak Detector 7 Specifications Detector: Thermistor-actuated thermal conduc- tivity cell Thermal conductivity of gases: He, CO 2 , 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…

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Agilent Technologies G3388B 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 Ta b l e 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
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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 …

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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 …

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Agilent Technologies G3388B G3388B Leak Detector 11 Leak indicator (LCD display) When the leak gas is detected, displays a bar graph. The number of bars indicates the relative size of the gas leak (maximum 8bars). Zero point display When measuring clean ambient air, the first bar alternates between ■ and □ when the detector becomes stable. Leak display ■: Indicates a gas leak for a gas with a higher thermal conductivity than air. □: Indicates a gas leak for a gas with a lower thermal conductivity than air. Leak indicator (LED display) When the leak gas is detected, the LEDs light from the bottom left to the top, then from …

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12 G3388B Leak Detector Detecting leaks To use the detector: 1 Press and hold [FUNC/POWER] to turn on the detec- tor. You will hear the detector begin to sample air. Wait until the warmup completes. 2 If desired, set the sensitivity range or other settings. See “Setting options” on page 13. 3 Check the stability at the zero point (while sampling clean air). When stable, the leak indicator in the LCD display will alternate between ■ and □. • If the detector indicates a leak (more than one bar), press [ZERO/ENTER] to res…

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G3388B Leak Detector 13 Setting options Press [FUNC/POWER] to cycle through the setting options or to toggle a selected function on or off. Press [ZERO/ENTER] to select a function for editing. See Figure 3 and Figure 4. Table 2 Item Function and options Range Select standard (Std) or high (Hi) range sensi- tivity. Standard is the factory default. Buzzer Enable/disable audible alarm for leaks that show 3 or more bars/LEDs. LED Turn LED indicators off/on. Turn off to conserve battery charge. Backlig…

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14 G3388B Leak Detector Figure 3 Setting options FUNC POWER FUNC POWER FUNC POWER FUNC POWER ZERO ENTER R_Std R_Hi Param.Set Range Std Buzzer ON LED ON Param.Set Range Std Buzzer ON LED ON Param.Set Range Hi Buzzer ON LED ON Param.Set Range Std Buzzer ON LED ON Param.Set Range Std Buzzer ON LED ON Param.Set Range Std Buzzer OFF LED ON Param.Set Range Std Buzzer ON LED ON Param.Set Range Std Buzzer ON LED ON Param.Set Range Std Buzzer ON LED OFF ZERO ENTER ZERO ENTER ZERO ENTER ZERO ENTER ZERO ENTER ZERO ENTER ZERO ENTER ZE…

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G3388B Leak Detector 15 Figure 4 Setting options, continued FUNC POWER FUNC POWER ZERO ENTER ZERO ENTER Param.Set Backlight ON A.P.Off OFF Param.Set Backlight ON A.P.Off OFF Param.Set Backlight OFF A.P.Off ON Param.Set Backlight ON A.P.Off OFF ZERO ENTER ZERO ENTER ZERO ENTER ZERO ENTER FUNC POWER Param.Set Backlight ON A.P.Off OFF Param.Set Backlight ON A.P.Off ON FUNC POWER Returns to the Standard Display Returns to the Standard Display Returns to the Standard Display Returns to the Standard Display d) Setting the Backlight e) Setting the Automatic Power Off AB
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16 G3388B Leak Detector Maintenance Charging the battery Charge the battery when the LCD display is blank or when the battery indicator shows less than 3 bars. To charge the battery: 1 Turn off the detector. 2 Connect the detector to a PC USB port using the USB to micro USB cable (part number G3388-80000). 3 Allow to charge for approximately 2.5 hours. Do not use the detector with the cable attached. The detector and battery may become warm while charging. After charging the battery, allow the detector to stabilize (cool) for 30 minutes before use. Low battery (20-30% charge) Very low battery (≤10 mi…

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G3388B Leak Detector 17 Replacing the filters The detector includes filters on the sample probe and reference port to protect against particulate contamination. A decrease in sensitivity can indicate a clogged filter. Replace the filters as described below. • Replacement sample probe filter: G3388-80001 • Replacement reference port filter: G3388-80002 To replace the sample probe filter 1 Turn off the detector. 2 Unscrew the probe halves and disassemble the probe. 3 Use long-nosed pliers to remove the old filter. 4 Install the filter into the probe base as shown below. Sampling probe …

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18 G3388B Leak Detector 5 Install the new filter over the PTFE tubing as shown below. 6 Reassemble the probe halves. To replace the reference port filter To replace the reference port filter, remove the old filter from the detector body, then insert a new filter. Filter PTFE tubing Reference port filter
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