DESCO TB-3098.E Mini Monitor Installation Guide

: September 14, 2024
: DESCO

Table of Contents

DESCO TB-3098.E Mini Monitor
Description
Packaging
Features and Components
Installation
Operation
Calibration
Specifications
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

DESCO TB-3098.E Mini Monitor

Description

The Desco Mini Monitor is a single workstation continuous monitor. It continuously monitors the path-to-ground integrity of one operator and one ESD worksurface. Its illuminated enclosure makes the status of the operator and worksurface highly visible to the operator and supervisor. Use the Desco 19344 Ring Magnets when mounting the monitor in areas without a worksurface.

The Mini 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 50 milliseconds) when the operator unintentionally disconnects from the monitor or the wrist strap connection points are intermittent. The Mini Monitor also monitors for a worksurface path-to-ground of less than 10 megohms. All Mini Monitors are calibrated to NIST standards.

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.

IEC 61340-5-1 clause 5.2.4 includes “Compliance verification records shall be established and maintained to provide evidence of conformity to the technical requirements.” Daily (wrist strap system) testing may be omitted if continuous monitoring is used (Ref: IEC TS 61340-5-4). Per IEC TR 61340-5-2 Wrist straps clause 5.3.3.4.2.9 “Typical Test programs recommend that wrist straps that are used daily should be tested daily. However, if the products that are being produced are of such value that knowledge of a continuous, reliable ground is needed, and then continuous monitoring should be considered or even required.”

The Mini Monitor and its accessories are available as the following item numbers:

Item	Description

19342| Mini Monitor, 4 mm,

with Universal Power Adapter

19343| Mini Monitor, 10 mm,

with Universal Power Adapter

Packaging

19342 Mini Monitor

1 Mini Monitor with 4 mm ParkSnap™
2 Countersunk Washer
2 Flat Head Screw, 6-32 x 3/8″
1 Power Adapter with IEC C14 Inlet, 9 VDC

19343 Mini Monitor

1 Mini Monitor with 10 mm ParkSnap™
1 Banana Plug to 10 mm Snap Adapter
2 Countersunk Washer
2 Flat Head Screw, 6-32 x 3/8″
1 Power Adapter with IEC C14 Inlet, 9 VDC

Features and Components

A. Power Jack: Connect the included 9 VDC power adapter here.
B. Park Delay Switch : Allows the operator to disconnect (and park) a wrist strap when leaving the workstation, without creating a false alarm. Touch the ParkSnap™ or park delay switch, and 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 or remove the banana plug from the jack. Upon returning to the workstation and disconnecting the wrist cord from the park snap, the operator has approximately 8 seconds to reconnect the wrist cord to a worn wristband before activating the alarm. The 8 second timer is indicated by the growing intensity of the monitor’s blue LEDs. The blue LEDs will pulse when the operator jack is vacant to indicate standby mode.
C. Operator LED: Illuminates green when the operator is properly grounded. Illuminates solid red and audible alarm sounds when the operator is not properly grounded.
D. Worksurface LED: Illuminates green when the worksurface is properly grounded. Illuminates red and audible alarm sounds when the worksurface is not properly grounded.
E. ParkSnap™: Allows the operator to disconnect (and park) a wrist strap when leaving the workstation, without creating a false alarm. Touch the ParkSnap™ or park delay switch, and 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 ParkSnap™ or remove the banana plug from the jack. Upon returning to the workstation and disconnecting the wrist cord from the ParkSnap™, the operator has approximately 8 seconds to reconnect the wrist cord to a worn wristband before activating the alarm.
F. Monitored Operator Jack: Insert the single-wire wrist cord here to monitor the operator’s connection to ground.
G. Set Switch: Toggles the monitor’s settings for the audible alarm and mat monitor circuit.

Function	Procedure
Audible Alarm Volume	1. Push and release the switch to toggle the

buzzer’s volume.

2. The volume will toggle from low

and high settings.

Enable / Disable Worksurface Monitor Circuit| 1. Push and hold the switch until all LEDs illmuniate white.

2. Release the switch.

3. An illuminated Worksurface LED indicates that the worksurface monitor circuit is enabled. A non-illuminated Worksurface LED indicates that the worksurface monitor circuit is disabled.

H. Threaded Ground Terminal: Connects the worksurface mat to electrical ground.
I. Threaded Worksurface Monitor Terminal: Verifies that the worksurface’s path-to-ground is less than 10 megohms.

Installation

Remove the Mini Monitor from the carton, and inspect for damage.
Locate an appropriate AC outlet near the Mini Monitor, and test it for proper wiring and grounding prior to use. The Desco AC Outlet Analyser or similar test equipment may be used to verify the outlet’s functionality. Use item 98134 for UK outlets and item 98135 for European outlets.
Determine the mounting location of the Mini Monitor. It is normally installed toward the front edge of a workstation. Use a blade to pierce two holes 1-5/16″ apart from one another into the worksurface mat. Click here to download the mounting template.
Use a Phillips screwdriver to secure the two flathead screws and countersunk washers through the worksurface mat and into the two threaded terminals on the bottom of the monitor.
Connect the power adapter to the power jack located on the Mini Monitor. Plug the power adapter into the tested AC outlet.

19344 Ring Magnets
Use the Desco 19344 Ring Magnets to mount the Mini Monitor onto metallic surfaces when worksurface mats are not used.

The worksurface monitor circuit must first be disabled before installing the magnets. Supply power to the monitor, and use a probe to push and hold the set switch on the bottom side until the LEDs illuminate white. The worksurface LED on the top side will turn off upon release of the set switch.
Use the included flat head screws to install the two ring mangets to the bottom side of the monitor.
Use the ring magnets to mount the monitor onto a metallic surface.

Operation

Fit the wristband snugly onto the wrist.
Snap the wrist cord to the wristband.
Plug the wrist cord into the operator jack. The operator LED will illuminate green. This indicates that the operator is properly grounded.
If this does not happen, examine the wrist cord for continuity or damage and the wristband to ensure that it fits securely. If experiencing dry skin, the operator may apply an approved dissipative hand lotion such as Reztore® ESD 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.

Calibration

Frequency of recalibration should be based on the critical nature of those ESD sensitive items handled and the risk of failure for the ESD protective equipment and materials. In general, Desco recommends that calibration be performed annually.
Use the Desco 98221 Wave Distortion Monitor Verification Tester to perform periodic verification (once every 6-12 months) of the Mini Monitor. The verification tester can be used to check the test limits of the Mini Monitor without removing it from the workstation.

See TB-3074.E for more information.

Specifications

Input Voltage and Frequency (External Adapter)| AC/DC Power Adapter

Power Input:

100-240 VAC, 50/60 Hz

Power Output: 9 VDC

Cable Length: 5 ft. (1.5 m)

---|---
Operating Temperature| 50 to 95° F (10 to 35° C)
Environmental Requirements| Indoor use only at altitudes less than 6500 ft. (2 km)

Maximum relative humidity of 80% up to 85° F (30° C)

decreasing linearly to 50% @ 85° F (30° C)

Dimensions| 2.49″ Dia. x 0.84″ H

(63 mm Dia. x 21 mm H)

*This cannot be verified with standard DC test equipment. The continuous monitor is an impedance sensing device, and the limits are determined by the magnitude and angle of the impedance.
**The worksurface mat must have a conductive layer such as Dual Layer Rubber or Dissipative 3-Layer Vinyl with conductive buried layers. Desco workstation monitors are not recommended for use with homogeneous matting.

Limited Warranty, Warranty Exclusions, Limit of Liability and RMA Request Instructions
See the Desco Europe Warranty – DescoEurope.com/Limited- Warranty.aspx

DESCO EUROPE – 2A DUNHAMS LANE, LETCHWORTH, HERTFORDSHIRE, SG6 1BE,
UK Phone: +44 (0) 1462 672005
E-mail: Service@DescoEurope.com,
Website: DescoEurope.com