Vacuum Lifting System Accessories
Vacuum Leakage Sensing Systems
VLS-08 Series – The Latest in Solid State Vacuum Leakage Detection
Made in the USA!
The VLS-08 Series Vacuum Leakage Detection unit is a popular safety device because it automatically monitors the vacuum level in vacuum handling machinery. If vacuum is lost during a lift, a loud horn sounds and a red light flashes to warn the operator.
The VLS-08 Series is a battery powered unit consisting of a pressure sensor, an audible warning horn, red warning light, and test switch that are all controlled by a solid state microchip. All ANVER Vacuum Lifters, Vacuum Tilters, and Specialty Vacuum Lifting Machinery can be equipped with a VLS-08 Series Solid State Vacuum Loss Sensor and Warning System. The system is packaged in a rugged polycarbonate enclosure with a 1/4″ push-to-connect fitting for tubing connections.
During each lifting cycle, the programmed ‘intelligent’ processor senses the peak vacuum level. From this point, a 10% loss (or 20% loss for the VLS-08-20) of vacuum with a leakage rate of less than 1½ in. Hg per second from that peak level will trigger the horn and light, informing the operator of a leak. The alarm will not sound on the detach cycle as with other primitive systems using preset switches. Even the smallest leak, anywhere in the system, will be detected.
Principle of Operation
The VLS-08 Series Vacuum Loss Sensor is a vacuum level differential detector, which is pre-programmed to activate the alarm at a 10% reduction in vacuum for VLS-08 or 20% reduction in vacuum for VLS-08-20 with a leakage rate of less than 1.5 inches Hg per second. The alarm will continue until a sufficient increase in vacuum is achieved, indicating no additional leakage is present, or the indicated vacuum level drops below 5 inches Hg. The horn, LED (red light), and LCD (digital display) can be tested by pressing and holding the “Test Button” for approximately 3 seconds. The unit is also equipped with a low battery indicator, which will cause the horn to “chirp” and the LED to flash when battery power is low. The battery should be replaced immediately with a standard 9V lithium battery. The auxiliary output jack on the VLS-08 Series is an open collector output, which can be connected directly to the VLS-AUX (auxiliary siren/strobe), or to another I/0 device, such as an emergency stop function on a CNC control, through a solid state relay.
WARNING: THIS VACUUM LEAKAGE WARNING DEVICE WILL NOT PROVIDE TIMELY WARNING TO THE OPERATOR IF A REDUCTION IN VACUUM HAS OCCURRED DUE TO INCORRECT USE OF A VACUUM LIFTER, SUCH AS OVERLOADING, LIFTING OVERSIZED LOADS, UNBALANCED LIFTING, OR IMPROPER OPERATION OF ANY KIND.
The VLS-08 is designed to be a warning device for vacuum leakage detection. When properly installed on an ANVER vacuum lifter, the operator will be warned of a slow vacuum leakage and should have adequate time to safely lower the attached load. If the alarm signal is ignored and the lifting operation is continued, the vacuum loss may adversely affect the vacuum “hold,” possibly resulting in serious injury to the operator. The VLS-08 is not designed for, nor effective in, detecting fast leaks or sudden failures of the vacuum system.
The vacuum level achieved, when using a Mechanical Vacuum Generator, is weight sensitive relative to the load and lifter weight, as well as the pad, manifold, and generator volume. Lighter loads produce a lower vacuum reading, which may render the VLS-08 Leakage Sensor ineffective, as the achieved vacuum level approaches 6 in.of Hg.
VLS-AUX Auxiliary Siren/Alarm (Optional)
Ordering Information for VLS-08, VLS-08-20, VLS-AUX
Vacuum Loss Sensor and Warning Device
|VLS-08-20||Vacuum Loss Sensor and Warning Device, Special 20% Version|
Auxiliary Alarm for VLS-08 Includes VLS-08CAB.
|VLS-07/08CAB||For Older Version:|
VLS-08 to VLS-07-AUX-S
|28100121||Mounting Bracket for VLS-08||N/A|
|VLS-07CAB||For Older Version:|
VLS-07 to VLS-07-AUX-S
VLS-08 to VLS-AUX
(Included when VLS-AUX is ordered)
NOTE: The VLS-01, VLS-02, and VLS-07 are no longer manufactured by or available from ANVER. Retrofit kits are available to repair/upgrade the VLS-01, VLS-02, and VLS-07. Contact ANVER for details.