7
746
3
wrist strap tester
o.k.
o.k.
FIGURE 1
8
2
1B
3
7
6
4
1A
5
1,5 m
(5 feet)
9
Verification Procedure
The 746 Wrist Strap Tester cannot be adjusted by the user, but the
following steps can be used to verify that the 746 is operating within
its specification. (The 746 may also be returned to 3M to obtain
certification. Please call 800-328-1368 for more information.)
Equipment needed
1. Resistance substitution box, 700 K
Ω
- 11 M
Ω
, accuracy < 2%.
2. Two lead wires to connect the resistance box to the 746 Tester.
Checking wrist strap test circuit
Connect the resistance substitution box to the tester as shown in
Figure 2.
Adjust the resistance substitution box to each value of resistance
indicated in the test table below and press contact plate A.
The LEDs will indicate, as shown below, if the unit is functioning
within specifications.
