3M 747 ユーザーズマニュアル

The ALL setting is described in Section 4.1, “Open Collector Output.”

Err.1

Finger removed from touch panel during 

measurement

Repeat the test

Err.2

Actual test type does not match specified 

test type

Check test type (location), and 

repeat the test

O.F.

Measured value exceeded 200.0 

MΩ 

(Overflow)

Check test type and connections, 

and repeat the test

3.1 ESD Shoe Testing with the 3M

™

 Shoes and Wrist Strap Tester 747

This procedure tests the effectiveness of ESD protective shoes, and displays the 
actual measured resistance value along with the qualitative test result.
1.  Ensure that the supplied shoes testing cable is connected between the shoe 

testing plate and the shoe testing connector. Refer to section 2.1, “Connecting 
the ESD Shoe Testing Plate.”

2.  Select the required threshold resistance values. Refer to Section 2.2, 

“Threshold Resistance Settings (1).”

3.  The wrist strap must not be connected to the front panel connector during 

shoe testing. If it is connected, remove it. 

4.  Step on the shoe testing plate, then press the touch panel with your finger. 

Continue pressing the touch panel until measurement is completed (until the                          

 indicator goes out).

 

Testing starts and the following indicators are displayed: 

 • 

 and 

 symbol appear on the LCD.

 

• The shoe LED lights yellow.