4.Testing finished in about a second, and the results are displayed as follows:
•
and 
symbol appears on the LCD.
•The measured value appears on the LCD, and one of the result LEDs lights according to the test result (comparison of measured value and thresholds).
•The wrist strap LED lights either green or red according to the test result:
•When the test result is OK, the LED lights green.
•When the test result is HIGH or LOW, the LED lights red.
5.When the test is finished, the results are displayed for about ten seconds. Afterwards, if running on batteries, the power turns off. If running on the AC adapter, the power saver activates the
Important Notes:
•The high end of the measurement range of the 3M™ Shoes and Wrist Strap Tester 747 is 200.0 MΩ. If the measured value exceeds this limit, “O.F.” is displayed on the LCD.
•If the finger is removed from the touch panel during a test (while 
appears on the LCD), or if pressure is too light on the touch panel, “Err.1” appears on the LCD. In this case, repeat the test.
•Wrist strap testing can be done even when the shoe testing cable and plate are connected.
4.0External Output Function
4.1Open Collector Output
Important Note: Always turn the power switch off the Shoes and Wrist Strap Tester 747 when making connections. To avoid damage to the Shoes and Wrist Strap Tester 747, do not apply more than the rated voltage and current of the OUTPUT connector.
Test results are available at the OUTPUT connector. By providing external power, a relay or sequencer can be controlled, for example, to open and close an automatic door.
After a measurement, if the test result is OK, the transistor controlling the open- collector output will turn on for 400 ms.
The output transistor functions as a switch between the output signal and internal ground. When the test result is OK, current flows from the output terminal to the internal ground.
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