This document provides an overview of 3M static control products, including the usage instructions for the wrist strap and footwear tester. The wrist strap and footwear tester can be wall-mounted in a production facility for daily testing of employees' static control wrist straps. The product has various resistance ranges and accuracy levels, and can be used as a footwear tester with the optional shoe electrode attachment.
The 3M 740 Wrist Strap and Footwear Tester is designed for wall‑mounting in production facilities to test employees' static control wrist straps and footwear. It operates from a 27 V DC transformer and provides open‑collector outputs for easy integration.
Key specifications include dimensions of 5.43 in × 7.48 in × 2.09 in, weight of 15.75 oz, test voltage of 20 V DC (+1 V open‑circuit), resistance ranges from 750 kΩ to 100 MΩ, and accuracy of +20 %/‑0 % at the lower limit. The unit uses the 3M™ Dual Lock™ system for secure wall mounting.
| Dimensions | 5.43 in. x 7.48 in. x 2.09 in. |
|---|---|
| Weight | 15.75 oz (450 g) |
| Power Supply | 27 V DC transformer, 150 mA (AC/DC adapter supplied) |
| Test Voltage | 20 V DC, +1 V (open circuit) |
| Resistance Range (wrist strap) | 750 kΩ lower limit; 2 MΩ, 5 MΩ, 10 MΩ, 35 MΩ upper limits |
| Accuracy | +20 %/‑0 % at 750 kΩ; +10 % up to 50 MΩ; +20 % at 100 MΩ |
| Output | Open collector at pins 1,2,4,5; DC return at pin 5; +5 V at pin 3 |
| Wall Mounting | 3M™ Dual Lock™ System |
The tester measures 5.43 in × 7.48 in × 2.09 in.
It uses a 27 V DC transformer delivering 150 mA, supplied via an AC/DC adapter.
The lower limit is 750 kΩ, with upper limits of 2 MΩ, 5 MΩ, 10 MΩ and 35 MΩ.
It is mounted using the 3M™ Dual Lock™ System.