Desco 19321 - Full-Time Continuous Monitor (with North American Power Cord)

The Desco Full-Time Continuous Monitor is a single workstation continuous monitor. It continuously monitors the wiring of an AC outlet, path-to-ground integrity of one operator, and the ground plane of one ESD worksurface. Mounting tabs make it suitable to install in workbench or equipment settings. The embedded relay terminal activates when a pass condition is displayed the monitor and maybe connected to machines for access control or other devices. Connect the 19323 Power Relay accessory to control power to workbenches, hand tools, and other electronic devices dependent on the Full-Time Continuous Monitor's status.

The Full-Time Continuous Monitor is designed with Wave Distortion Technology to provide stable continuous monitoring of the path-to-ground and presence of 1 megohm resistance of an operator’s wrist strap. Audio and visual alarms activate (in less than 500 milliseconds) when the operator unintentionally disconnects from the monitor or the wrist strap connection points are intermittent. The Full-Time Continuous Monitor also monitors for a worksurface path-to-ground of less than 10 megohms and the integrity of the electrical ground used to by the monitor All Full-Time Continuous Monitors are calibrated to NIST standards and include a certificate.

Wave Distortion Technology is the Most Reliable Technology for the Continuous Monitoring of Single-Wire (Conductor) Wrist Straps "Wave Distortion" or vector impedance works by applying a continuous test voltage of 1.2 volts peak-to-peak at 1 to 2 microamperes (0.000002 amperes) to the wrist strap that is connected to the continuous or constant monitor. The test voltage creates a square wave that the monitor circuit compares to established patterns.

By monitoring the "distortions", or shape of the square wave, Wave Distortion Technology determines if the monitored circuit is complete - the operator is in the circuit and the total equivalent DC resistance is within specifications. Wave Distortion Technology produces a very fast alarm time and minimal false alarms.

Operation

After attaching the wristband and wristcord, plug the cord into the operator jack. The green LED will illuminate indicating the operator is properly grounded. If this does not happen, check the cord for continuity or damage, and ensure the wristband fits securely. Users with dry skin should apply an approved dissipative hand lotion.

When leaving the workstation, first touch the monitor's park switch or park snap. The monitor's audible alarm will disable for approximately 8 seconds. Use this time to disconnect the wrist cord from the wristband and attach it to the park snap without sounding a false alarm.

Upon returning to the workstation and disconnecting the wrist cord from the park snap, the monitor will provide approximately 8 seconds for the operator to reconnect the wrist cord to a worn wristband before sounding the monitor's alarm.

Using the Full-Time Continuous Monitor when mounted on a workbench upright

Using the Full-Time Continuous Monitor at a machine station

Relay Terminal

The Full-Time Continuous Monitor features a relay terminal that can be integrated with electronic locks, lights, buzzers, etc. The relay will activate when a failure is reported by the Full-Time Continuous Monitor.