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USER GUIDE TB-9040
740 Wrist Strap and Footwear Tester
Installation, Operation and Maintenance
Figure 1. SCS 740 Wrist Strap and Footwear Tester
Description
The SCS 740 Wrist Strap and Footwear Tester
meets ANSI/ESD S20.20 per ESD TR53 Compliance
Verification testing of personnel grounding devices. The
740 Wrist Strap and Footwear Tester is an electronic test
instrument that is easy to operate and designed to be
wall-mounted. A power adapter is supplied.
The unit consists of two measurement circuits with
an open circuit test voltage of 14V for wrist strap and
Footwear Test applications. For wrist strap and footwear
testing, a minimum threshold resistance of 750 kilohm
is set internally. The desired maximum allowable
resistance level can be selected separately for each
measurement. If the resistance of the tested wrist strap
or footwear is within the selected range, the green
"O.K." LED will illuminate. The red "<" LED alerts the
operator that the resistance of the tested device is under
750 kilohm. The red ">"LED indicates that the selected
maximum resistance is exceeded.
The 740 Wrist Strap and Footwear Tester can be
connected to external devices such as computers (for
data recording), electrical door opening systems, or
other logic driven components.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TB-9040 Page 1 of 6
August 2017
The 740 Wrist Strap and Footwear Tester and its
accessories are available as the following item numbers:
Item
740
740E
741
741D
741DC
740P
724-PSEU
Features and Components
LED for
too low
resistance
Ground cord
4 mm stud
Contact plate
for Wrist
Strap Test
Socket for
Wrist Strap
Ground socket
Output signal for
external devices
Figure 2. 740 Wrist Strap and Footwear Tester features
and components
Packaging
1 Wrist Strap and Footwear Tester
1 Wall Mounting Kit (Dual Lock Fasteners)
1 Power Adapter
TestEquipmentDepot.com
Description
Wrist Strap and Footwear Tester, North
America
Wrist Strap and Footwear Tester, Europe
Single Foot Plate, for 740 Tester
Dual Foot Plate, for 740E Tester
Foot Plate Cable, for 741D Foot Plate
Power Adapter, North America Plug
Power Adapter, UK and Europe Plugs
Uppper limit
Foot Plate
selection for test
Socket
LED for
too high
resistance
Contact plate
for Footwear
Test
Connection
to AC/DC
Transformer
© 2017 DESCO NDUSTRIES, NC.
Employee Owned
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Summary of Contents for SCS 740
- Page 1 4 mm stud meets ANSI/ESD S20.20 per ESD TR53 Compliance Verification testing of personnel grounding devices. The 740 Wrist Strap and Footwear Tester is an electronic test Contact plate Contact plate instrument that is easy to operate and designed to be...
- Page 2 Installation Wrist Strap Test 1. Remove the tester from the carton and inspect for Put the wristband on with the wrist cord attached, and damage. insert the wrist cord into the wrist strap jack. Depress the metal contact plate and hold it. One of the indicator- 2.
- Page 3 Data Output Connector Data output connect pin status when using wrist strap/Footwear If you are going to use the data output connector, you must follow a test sequence. Test the wrist strap first and then the Footwear. If this sequence is not strictly kept, the output at the pins described in Figure 6 will be incorrect.
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Page 4: Specifications
Calibration TESTING THE FOOTWEAR CIRCUIT 1. Verify that the tester is connected to electrical The Wrist Strap and Footwear Tester is calibrated to ground, and power it ON. standards traceable to NIST. Frequency of recalibration should be based on the critical nature of those ESD 2. - Page 5 Wrist Strap and Footwear Tester Logbook 1 2 3 4 5 6 7 8 9 W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S TB-9040 Page 5 of 6 ©...
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Page 6: Safety Information
Safety Information Warning To reduce the risks associated with environmental contamination: When working with the automated equipment, always observe safety precautions as recommended by equipment manufacturer and your company’s practices. Caution To reduce the risks associated with environmental contamination: Dispose of the monitor in accordance with local, state, and federal regulations.
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