GL Sciences LD239 Manuals

GL Sciences LD239 Instruction manual (8 pages)

• Identifier: id-2178658
• Brand: GL Sciences
• Device: Security Sensors
• Type: Instruction manual, PDF
• Key Aspects: Technical Details and Specifications, Practical Usage Examples, Industry Comparisons
• UPD Date: 11.08.2026
• Source File: 2108976.pdf
• Pages: 8
• Description: Installation and maintenance guide for the GL Sciences LD239. This manual provides guidance on warranty information, specifications, usage examples.

Key Pages and Contents:

• 1) When using LD239 for flammable gases leakage, make sure the

  sufficient ventilation in the room. 2) The sensitivity of the detector comes to be extremely worse when the surrounding contains the leaking gas. 3) Sensitivity of LD239 can be affected by wind. Please be careful for outdoor use. 4) Do n

• 2) Flow diagram of parameter settings

  㪩㪶㪪㫋㪻 㪩㪶㪟㫀 Standard Display(Std range) Standard Display(Hi range) 㪧㪸㫉㪸㫄㪅㪪㪼㫋 䄿㪙㪸㪺㫂㫃㫀㪾㪿㫋 㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷 䅃㪘㪅㪧㪅㪦㪽㪽㩷㩷㩷㩷 ●Setting the Range ●Setting

• 1) Press FUNC/POWER key for about 1 second and then the power is turned

  on. Then, the LCD shows warming-up display. Warming-up takes 25seconds at standard range (Std), 90seconds at high range (Hi). Press the ZERO/ENTER key to skip it. 5. Operating Procedure 4 2) After the warm-up or skipping the war

• ●LD239 has a rechargeable lithium-ion battery. Before using the product for

  the first time, or before using the product following an extended period of disuse, recharge the battery with an attached micro USB cable connecting to PC. (Charging micro USB cable : Cat.No.2702-19331) If PC

GL Sciences LD239 Operation & user’s manual (12 pages)

• Identifier: id-1310436
• Brand: GL Sciences
• Device: Security Sensors
• Type: Operation & user’s manual, PDF
• Key Aspects: Usage Recommendations Under Different Conditions, Special Promotions for Users, Innovations in Design
• UPD Date: 17.04.2026
• Source File: 1417323.pdf
• Pages: 12
• Description: Complete device guide for the GL Sciences LD239. It details device setup and configuration options, system parameters, hardware components, hardware setup.

Key Pages and Contents:

• LD 239 Leak Detector User’s Guide

  Issue 1 GL Sciences B.V. Page 12 7.3 Replacement of Reference Port Filter To replace the reference port filter (Fig. 7.3), unscrew the old reference port filter out, and replace a new one instead (p/no 2702-19334). Reference Filter Fig. 7.3 Reference Port Filter

• LD 239 Leak Detector User’s Guide

  Issue 1 GL Sciences B.V. Page 10 Blinking (selecting) condition Display STD range Display Hi range Fig. 5.1 Flow Diagram Setting Configuration Parameters

• LD 239 Leak Detector User’s Guide

  Issue 1 GL Sciences B.V. Page 4 CE Compliance GL Sciences B.V. hereby declares under our sole responsibility that Leak Detector LD239 is in conformity with 2004/78/EC European EMC Directive including EN31326-12006 and EN61326- 2-2:2006 standards. Contents Introd

• LD 239 Leak Detector User’s Guide

  Issue 1 GL Sciences B.V. Page 5 Introduction LD239 electronic leak detector is highly sensitive instrument designed for use with the laboratory equipment especially for detection of traces of helium or hydrogen gas leaks in GC environment. In general, LD239 can d