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USER GUIDE TB-9015
Static Monitor 790
Installation, Operation and Maintenance
Figure 1. SCS Static Monitor
Description
The SCS Static Monitor 790 is designed to monitor the
operation of two wrist strap grounding systems and the
ground connection of a specified equipment chassis.
2300VM Series and SCS Dual Conductor Ground Cord
2300 Series. The monitor operates from a 120VAC
adaptor that is included in the North America version.
adapter meeting the specifications. The product has not
2300VM Series are required for use with the Static
Monitor 790, ordered separately.
Meets requirements of ANSI/ESD S20.20 and
AC Adapter
SCS Static Monitor 790
Figure 2. SCS Static Monitor
TB-9015 Page 1 of 7
June 2015
790.
Mounting
Chassis/
Ground
Cords with
Connector
790
Kit.
SCS
Theory of Operation
The SCS Static Monitor 790 is designed to continuously
high impedance voltage measurement circuit. The
measured operator's voltage is compared to one of four
voltages. An alarm will sound with a corresponding
contact detection circuit is also employed to let the user
The ground connection of the Static Monitor 790 is
continuously monitored through a low DC current-loop
measurement circuit. The ground connection of an
connected in series with the monitor's ground
measurement circuit. An alarm will sound with
corresponding red lamps, when this loop resistance
If all monitored components are operating within the
selected operating parameters of the Static Monitor 790,
a green lamp will illuminate.
The Static Monitor 790 uses a modified version of the
*Voltage alarm levels ±15%
**Ground disconnect ±20%
installation.
StaticControl.com
© 2015 DESCO INDUSTRIES, INC.
Employee Owned
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Summary of Contents for SCS Static Monitor 790
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Page 1: Theory Of Operation
DC current-loop measurement circuit. The ground connection of an Description The SCS Static Monitor 790 is designed to monitor the connected in series with the monitor’s ground operation of two wrist strap grounding systems and the measurement circuit. - Page 2 Electrical Ground Electrical Ground monitoring the ground connection through a grounded Figure 4. SCS Static Monitor 790 Connected Directly to Ground or Through Equipment Chassis Ground. Installation of Static Monitor 790 with Chassis Installation of SCS Static Monitor 790 with Chassis...
- Page 3 Ground Cord connected to the chassis ground terminal of the two-wire connector, with a rear of the Static Monitor 790. Figure 7. SCS Static Monitor 790 attached to equipment chassis. loose or lost connections. Refer to Figures 5, 6, and 7 Attaching the SCS Static Monitor Locate the Mounting Plate.
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Page 4: Operating Your System
Selection of the Reference Voltage The Static Monitor 790 allows for the selection of one of voltage to ground when wearing a static protective wrist static electricity. Prior to incorporating the static monitor into your static control process, the operator was unaware of these events. -
Page 5: Verification Procedure
Verification Procedure This procedure verifies the positive/negative voltage detection levels and ground monitoring performance of the SCS Static Monitor 790 as stated in, Specifications flashes at a slower rate than the lamp located on the section of this user guide. -
Page 6: Specifications
Line voltage within to the appropriate voltage level tolerances as required to operate the Static Monitor 790. If the ground wire of the AC adaptor is not used, it is recommended strap input on the SCS Static Monitor 790, AC adaptor using electrical tape. -
Page 7: Regulatory Information
Made in China after written notification of said nonconformance and Limited Warranty, Warranty Exclusions, Limit of return of said product to SCS. SCS shall not under any Liability and RMA Request Instructions to use the product. Unless stated otherwise in writing, StaticControl.com...
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