Vacuum Leak Detection System

The advanced Vacuum Leak Detection System continuously monitors the interstitial area around double-walled piping, enclosures, tank walls, etc. The controller creates a vacuum in the interstitial space and if it senses a significant pressure drop, the controller attempts to restore the vacuum in the interstitial space. If the vacuum is not restored in time, a leak alarm will occur and be annunciated by the controller with an audible/visual alarm. The system also alerts the operator ahead of time if run time conditions start to get worse. Vacuum leak detection gives significant benefits of early alerts even before liquid is present.

  • Single wall-mounted NEMA-4 enclosure for ease of installation.
  • Separated monitored zones means a leak in one zone does not affect the monitoring of other zones.
  • No field wiring required between the controller and the zone monitoring manifold.
  • Panel built to UL 508 standard.
  • Standard 5" touch screen an overview screen, alarm screen, and commissioning screen, cycle history, and cycle count / pump run time screen.
  • Standard Modbus Ethernet and RS-485 communication.
  • Third-Party tested and NWGLDE listed.
  • Overview and Features
  • Specifications
  • Documents
Overview and Features

The TG-VLM-P-4 is a self-contained 4-zone vacuum leak monitor panel designed to monitor both double walled fuel supply/return piping and fuel tanks for vacuum leaks.

  • Continuous Leak Monitoring for up to 4 zones. Zones can be enabled/disabled as needed.
  • One-Touch Commissioning for quick, easy setup.
  • 50-entry Zone Cycle History monitors for trends in cycle time and can catch loose connections early.
  • Custom Zone Naming that appears in all histories and alarms.
  •  Pre-Wired and Tested Panel with minimal required setup and commissioning.
  • Quick Connect Fittings for pressure tubing to each zone.
  • No Field Wiring Required only need to run incoming power and optional RS-485 and leak alarm contact.
  • Low Vacuum Alarm activates immediately above -2”hg. Can catch leaks faster than the standard vacuum pump sequence.
  • Adaptive Warning Alarms to alert when a zone condition is declining and approaching a leak alarm. 
  • Modbus Communication with RS-485 and Ethernet capability.
  • Live I/O Viewing Screen for more convenient troubleshooting.
Specifications

Controller:

Enclosure:              Nema 12 Faceplate, Indoor Locations

Bezel:                     3 7/8 w x 8 h x 1 d                                

Rear Case:             3 1/2 w x 7 9/16 h x 4 7/8 d 

Panel Cutout:         3.61 w x 7.65 h

Weight:                   2 lbs

Ambient:                 32-131 F (0-55 C)

Altitude:                  6560 feet (2000 meters)

 

Electrical:

Input Power:           120Vac +/-15%, 50/60 Hz, 26 VA

Output Power:        24 Vdc, 300mA max combined load

Terminals:               31,35,37,40,42

 

Analog Inputs

(4) 16 bit, 5 samples/sec, 50/60Hz filter: -90db                                    

Zones 1-4 Pressure Transmitter

 

Analog Output

(2) 16 bit, 4-20mA, max 650 ohm load

Leak Alarm Light, Alarm Buzzer

 

Enclosure: Cabinet for wall mounting 14”x16”x10” Steel

Relay Outputs

(2) SPDT, (2) SPST, 120Vac,10 A

Pump Start, Alarm Output, Zone 3 Solenoid, Zone 4 Solenoid

 

DC Discrete Outputs

(2) 24 Vdc, 200mA, Sinking

Zone 1 Solenoid, Zone 2 Solenoid

 

Communications

USB: JC_TG_Edit config & Firmware Flashing

RS485: Isolated, 4.8 - 57.6k baud, Modbus RTU

Ethernet: 10/100 Mb/s, Modbus/TCP

Documents

Vacuum Leak Detection System Specification

Vacuum Leak Detection System Cutsheet

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