3M Watch 3M Wrist Strap Tester User Manual

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78-8136-2118-8
4.0 Specifications
Base unit:
158 x 95 x 33 mm (6.25 x 3.75 x 1.25 inches)
Weight:
200 g (7 ounces) without battery
Battery:
9V alkaline type, e.g. IEC 6F22
Tolerance:
750 k
Ω + 20%/-0%, 10 MΩ ± 10%
Measurement Voltage:
DC (19±1) V (open circuit)
Power Supply (not included):
DC 9V, regulated, 75mA (50Hz)
5.0 How to Use
5.1 Insert 9V battery and make sure the ON/OFF
switch at the upper left side on the unit is in
the ON position. The OFF position avoids
discharge of the battery if the metal contact plate
is accidentally depressed while the unit is not
in use. The unit is then ready for operation. The
backup of the battery can be achieved by using
an AC Power Supply. In that case, connect the
AC power supply to the jack at the base of the
unit. Plug the power supply into an AC 230V
outlet.
5.2 Fit the plastic cover onto the wrist strap plug-in
jack that is not being used. If the "battery" LED
illuminates, replace it immediately.
Wrist Strap Test
5.3 Put the wrist band on with ground cord attached,
and insert the ground cord plug into the wrist
strap plug-in jack.
5.4 Depress the metal contact plate and hold it.
5.5 One of the indicator LEDs will illuminate.
An illuminated green LED indicates that the
wrist strap performs within the resistance range
of 750 k
Ω to 10 MΩ. If a "red" condition is
indicated, it is advisable to check the ground cord
individually for its resistance.
For checking the resistance range of the ground
cord, leave the plug end of the ground cord
attached to the tester and unsnap the cord from
the wrist band. Place the metal side of the ground
cord snap against the metal plate of the tester
and depress until one of the LEDs is illuminated.
If the red LED is illuminated, the ground cord
is outside the resistance range and should be
replaced. If the green LED illuminates, the
ground cord can be used, but the wrist band may
have to be replaced.
Note: In some cases, high contact resistance between
the person's skin and wrist band will cause the tester
to show a fail/red LED condition. This resistance may
be caused by dry skin or hair in the wrist area. If these
possibilities do not match to the operator, the wrist
band should be replaced.
5.6 If the "battery" LED illuminates at any time,
replace the battery.
Wall Mounting
5.7 The enclosed 3M™ Dual Lock™ adhesion discs
shall be screwed on the wall using the attached
template approximately 1500 mm (5 feet)
parallel off the floor. Drill three holes of 5 mm
(0.2 in) diameter at marked location.
5.8 The enclosed 3M Dual Lock adhesion strips must
be adhered to the rear of the 3M™ Wrist Strap
Tester 746 parallel to the bottom edge and below
the battery compartment.
Note: Make sure the area on the unit in which
the Dual Lock adhesion strips are placed is
free of dust and dirt. Press the tester firmly
against the discs for fixing on the wall.
5.9 For removal, lift the tester 746 at the two top
corners with both hands.

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