DESCO 19651 Multi Mount Monitor Instruction Manual
- June 14, 2024
- DESCO
Table of Contents
DESCO 19651 Multi Mount Monitor
Description
The Desco Multi-Mount Monitor is a single workstation continuous monitor. It continuously monitors the path-to-ground integrity of one operator and one ESD worksurface. Mounting tabs make it suitable to install in workbench or equipment settings. Connect the 19653 Remote Alarm accessory to the Multi- Mount Monitor, and place it in the operator’s field of view for increased alarm visibility. The Multi-Mount Monitor is designed with Wave Distortion Technology which provides 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 Multi-Mount Monitor also monitors for a worksurface path-to-ground of less than 10 megohms. All Multi-Mount 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 voltspeak-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 (<50 milliseconds) and
minimal false alarms.
ANSI/ESD S20.20 section 7.3 states “Compliance verification records shall be
established and maintained to provide evidence of conformity to the technical
requirements.” Per ANSI/ESD S1.1 Annex A.3 Daily(wrist strap system) testing
may be omitted if constant monitoring used.” Per ESD Handbook ESD TR 20.20
section 5.3.2.4.4 “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 Multi-Mount Monitor and its accessories are available as the
following item numbers:
Item | Description |
---|---|
19651 | Multi-Mount Monitor, North American Power Adapter |
19652 | Multi-Mount Monitor, Universal Power Adapter |
19653 | Remote Alarm |
19258| Power Adapter, 100-240VAC Input, 24VDC 150mA Output, IEC
Inlet
19260| Power Adapter, 100-240VAC Input, 24VDC 150mA Output,
North America Plug
19264| Power Adapter Extension Cord, 3′
98221| Wave Distortion Monitor Verification Tester
Packaging
19651 Multi-Mount Monitor, North America
- 1 Multi-Mount Monitor
- 1 Mat Monitor Cord (White)
- 1 Countersunk Washer
- 1 Flat Head Screw, 6-32 x 1/4″
- 2 Pan-Head Screws, #6 x 3/8″
- 1 Dual Lock Fastener Set, 2″ Length
- 1 Power Adapter, 24VDC, North America Plug
- 1 Certificate of Calibration
19652 Multi-Mount Monitor, Universal Power Adapter
- 1 Multi-Mount Monitor
- 1 Mat Monitor Cord (White)
- 1 Countersunk Washer
- 1 Flat Head Screw, 6-32 x 1/4″
- 2 Pan-Head Screws, #6 x 3/8″
- 1 Dual Lock Fastener Set, 2″ Length
- 1 10mm Interchangeable Park Snap
- 1 10mm Operator Jack Adapter
- 1 Power Adapter, 24VDC, IEC Inlet
- 1 Certificate of Calibration
NOTE: The power cord must be purchased separately if ordering the 19652 Multi-Mount Monitor. The power cords are available as the following item numbers:
Item | Plug Type |
---|
50545| Europe
50546| United Kingdom
19653 Remote Alarm
- 1 Remote Alarm
- 1 Remote Cable, 7′ Length
- 2 Pan-Head Screws, #6 x 3/8″
- 1 Dual Lock Fastener Set, 1″ Length
Features and Components
Multi-Mount Monitor
- A. Mat Monitor Switch: Use a probe to access the mini slide switch. Slide the switch to the right to enable the mat monitor circuit. Slide the switch to the left to disable the mat monitor circuit. This switch is enabled as default.
- B. Buzzer Volume Adjustment: Turn the trim pot clockwise to increase the buzzer volume. Turn the trim pot counterclockwise to decrease the buzzer volume.
- C. Monitored Operator Jack: Insert the single-wire wrist cord here to monitor the operator’s connection to the ground.
- D. Operator LEDs: Illuminates green when the operator is properly grounded. Illuminates solid red and audible alarm sounds when the operator is not properly grounded.
- E. Mat LEDs: Illuminates green when the worksurface is properly grounded. Illuminates red and audible alarm sounds when the worksurface is not properly grounded.
- F. Park Snap: Allows the operator to disconnect (and park) a wrist strap when leaving the workstation, without creating a false alarm. Touch the park snap and the monitor’s audible alarm will disable for approximately 10 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 10 seconds to reconnect the wrist cord to a worn wristband before activating the alarm.
- G. Mat Monitor Screw Terminal: Verifies that the worksurface’s path-to-ground is <10 megohms. Connect the white mat monitor cord here.
- H. Power Jack: Connect the included 24VDC power adapter here.
- I. Remote Alarm Jack: Connects to the 19653 Remote Alarm accessory.
Remote Alarm
- A. Multi-Mount Monitor Jack: Connects to the Multi-Mount Monitor.
- B. Operator LEDs: Illuminates green when the operator is properly grounded. Illuminates solid red and audible alarm sounds when the operator is not properly grounded.
- C. Mat LEDs: Illuminates green when the worksurface is properly grounded. Illuminates red and audible alarm sounds when the worksurface is not properly grounded.
Installation
- Remove the Multi-Mount Monitor from the carton, and inspect for damage.
- Locate an appropriate AC outlet near the Multi-Mount Monitor, and test it for proper wiring and grounding before use. The Desco AC Outlet Analyzer or similar test equipment may be used to verify the outlet’s functionality. Use item number 98132 for 120VAC North American outlets and item number 98131 for 220VAC UK outlets.
- Determine the mounting location of the Multi-Mount Monitor. Its LEDs should be visible to the operator. Secure the Multi-Mount Monitor to a surface using its mounting tabs and the included pan-head screws or dual lock fasteners.
- Secure the ring termination of the white mat monitor cord to the mat monitor screw terminal on the side of the Multi-Mount Monitor. Ensure that the mat monitor switch is enabled if using this monitored circuit.
- Connect the mat monitor cord from the side of the Multi-Mount Monitor to a grounded worksurface mat. Use the included countersunk washer and flat head screw to secure the cord to the grounded mat.
- Connect the power adapter to the power jack located on the side of the Multi-Mount Monitor, and plug the power supply into the tested AC outlet.
Remote Alarm
- Determine the mounting location of the optional 19653 Remote Alarm. Locate it within reach of the included remote cable. Its LEDs should be visible to the operator. Secure the Remote Alarm to a surface using its mounting tabs and the included pan-head screws or dual lock fasteners.
- Connect the Remote Alarm to the Multi-Mount Monitor using the remote cable.
10mm Park Snap and 10mm Operator Jack Adapter The 19652 Multi-Mount Monitor includes an interchangeable 10mm park snap and 10mm banana jack adapter for operators who use wrist cords with 10mm terminations. Use the park snaps’ knurled rims to unscrew the 4mm park snap from the monitor and install the 10mm park snap to the monitor. Plug the 10mm operator jack adapter into the monitor’s operator jack.
Operation
- Fit the wristband snugly onto the wrist.
- Snap the wrist cord to the wristband.
- Plug the wrist cord into the operator jack. The green operator LED will illuminate. 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 you have dry skin, apply an approved dissipative hand lotion such as Menda Reztore® ESD Hand Lotion.
- When leaving the workstation, first touch the monitor’s park snap. The monitor’s audible alarm will disabled for approximately 10 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 10 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 Multi-Mount Monitor. The
verification tester can be used to check the test limits of the Multi-Mount
Monitor without removing it from the workstation.
See TB-3074 for more information.
Specifications
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
Dissipative3-Layer Vinyl with conductive buried layers. Desco workstation
monitors are not recommended for use with homogeneous matting.ANSI/ESD S20.20
requires the use of a surface resistance meter for periodic verification of a
worksurface’s resistance-to-ground (Rtg). Constant monitors may not be used as
a substitute for this requirement.
Limited Warranty, Warranty Exclusions, Limit of Liability and RMA Request
Instructions
See the Desco Warranty –Desco.com/Limited-Warranty.aspx
DESCO WEST – 3651 Walnut Avenue, Chino, CA 91710 •
909-627-8178
DESCO EAST – One Colgate Way, Canton, MA 02021-1407 •
781-821-8370
Website: Desco.com
References
- Desco - Static Control Products and Supplies for ESD Protection
- Desco - Limited Warranty
- Desco - 19258 100-240VAC, 24VDC 150 MA Out, IEC Inlet Adapter
- Desco - 19260 Adapter, North American Plug, 100-240VAC In, 24VDC 150 MA Out
- Desco - 19652 Multi-Mount Continuous Monitor with Universal Plug
- Desco - 19653 Remote Alarm for Multi-Mount Monitor
- Desco - 98221 Wave Distortion Monitor Verification Tester
- Desco - 98131
- Desco - 98132
- EMIT
- EMIT
- Desco - Static Control Products and Supplies for ESD Protection
- Desco - 19264 Power Adapter Extension Cord, for Mini & Multi-Mount Monitors, 3’
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