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MO 0765-0601
R
max
III. Description
The 740 wrist strap and shoe tester is an electronic
test instrument which is easy to operate and
designed to be wall mounted. An AC/DC
transformer is supplied. The 740 switches off
automatically after non-use for approximately
30 minutes.
The unit consists of two measurement circuits
with an open circuit test voltage of 20 V for wrist
strap and shoe test applications. For wrist strap
and footwear testing, a minimum threshold
resistance of 750 kΩ 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 kΩ. The red ">" LED indicates that the
selected maximum resistance is exceeded.
The 740 can be connected to external devices such
as computers (for data recording), electrical door
opening systems, counter or other evaluating
components.
The 740 wrist strap and shoe tester
consists of:
- Instruction manual with daily log sheet
- Base unit
- Data output connector plug
- Wall mounting kit, 3M Dual Lock™ fastening
system and template
- Cover for wrist strap plug-in jack
- AC/DC transformer
- Ground cord
Accessories:
- Shoe electrode type 741 (single electrode) sold
separately
IV. Operation
Connect the AC/DC transformer (DC 24-30 V,
150 mA) to the 740 tester.
Note: If you notice a delay in the response time of
the LED illumination please connect the ground
cord supplied to the ground socket of the 740.
Please ensure proper earth ground connection!
Switch the unit on. All LEDs will flash for
approximately 1 s to check their function. Select
the desired upper maximum resistance level for
both the wrist strap and shoe test by using a small
screw driver.
The 741 shoe electrode must be connected if
footwear testing is required.
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