3M 740 User Manual

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MO 0765-0601
740
wrist strap + shoe tester
3
<
>
o.k.
12
2 -
5 -
10 -
35 -
- 10
- 35
- 50
- 100
on / off
+
-
Output
R
max
DC 24
•
30 V / 150 mA
11.1 MΩ
AB
Verification of shoe test circuit:
Connect the reference resistor to the 740 as shown
in Figure 2. Select the 10 MΩ range using the
reference resistors indicated in the test table and
press contact plate B.
The LEDs will indicate as shown below. Repeat
this procedure for 35, 50 and 100 MΩ ranges.
Reference Resistance LED -
resistor range settings Indication
750 kΩ 10 MΩ - range Red
900 kΩ Green
9.0 MΩ Green
*>11.0 MΩ Red
31.5 MΩ 35 MΩ - range Green
>38.5 MΩ Red
45.0 MΩ 50 MΩ - range Green
>55.0 MΩ Red
80.0 MΩ 100 MΩ - range Green
>120.0 MΩ Red
*This example is used above
Figure 2

3M 740 Specifications

General

Input Impedance	50 Ω
Attenuation	10:1
Type	Passive Voltage Probe
Test Agent	Oscilloscope
Compatibility	Oscilloscopes with 50Ω input impedance
Rise Time	700 ps