TB-9112 Page 3 of 3

© 2021 DESCO INDUSTRIES INC

Employee Owned

SCS - 926 JR Industrial Drive, Sanford, NC 27332

East: (919) 718-0000 | West: (909) 627-9634 • Website: StaticControl.com

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, SCS recommends that calibration

be performed annually.

NOTE: The following procedure should only be done by

someone familiar with voltage hazards. This procedure

will work for 220 VAC as long as the neutral and ground

are referenced. 220 VAC produced with out-of-phase

110VAC-Ground-110VAC will produce a FAIL result.

1. Disconnect the power cord from the electrical outlet

and connect it to a 3-prong to 2-prong adapter to

isolate its ground pin.

2. Connect the 3-prong to 2-prong adapter to an

appropriate AC outlet to power the Common Point

Ground Monitor.

3. Connect a 5 kilohm resistor (5% tolerance) between

the supply ground and power cord's ground pin.

The status LEDs should illuminate green until the

resistor is removed. This test validates the PASS

point for the neutral-to-ground resistance.

4. Connect a 12.5 kilohm resistor (5% tolerance)

between the supply ground and power cord's

ground pin. The status LEDs should illuminate red

and audible buzzer should sound. This test validates

the FAIL point for the neutral-to-ground resistance.

Limited Warranty, Warranty Exclusions, Limit

of Liability and RMA Request Instructions

See the SCS Warranty -

StaticControl.com/Limited-Warranty.aspx

Operation

Use the banana jacks on the ground hub to connect

banana plugs to ground. Use the 6 included socket

head screws and split washers to secure ground wires

with ring terminals.

Figure 4. Using the Common Point Ground Monitor

Specifications

Input Voltage and

Frequency

Power Input:

100-240 VAC, 50/60 Hz

Power Cord Length:

6 ft. (1.8 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

4.38" L x 2.47" W x 1.00" H

(111 mm x 63 mm x 25 mm)

Weight

0.35 lbs. (0.16 kg)

Equipment Ground

Conductor Resistance

Limit

10 kilohms (nominal)

Country of Origin

United States of America