3M 747 - Manuals

5 1.0 Overview 1.1 Product Outline To reduce the risks associated with an explosion hazard, which, if not avoided, could result in death or serious injury: • Do not use in an explosive environment. 3M ™ Shoes and Wrist Strap Tester 747 is not designed to be intrinsically safe. To reduce the risks as...

6 1.2 Part Names of the 3M ™ Shoes and Wrist Strap Tester 747 1.2.1 Front Panel 1. Test Result LEDs – Indicates test results according to specified threshold resistance. 2. LCD – Shows measurement values and test location status.3. Test Location LEDs –Indicate the test location and status.4. Touch P...

7 1.2.2 Side Panels 1. Power Switch – Turns the 3M ™ Shoes and Wrist Strap Tester 747 on and off. 2. Threshold Resistance Selection Switches – Select the threshold resistances for shoes and wrist strap tests. 3. Test Result Output Selection Switch – Selects which test results are present at the OUTP...

8 2.0 Preparation Before Testing 2.1 Connecting the ESD Shoe Testing Plate To reduce the risks associated with an explosion hazard, which, if not avoided, could result in death or serious injury:• Do not use in an explosive environment. 3M ™ Shoes and Wrist Strap Tester 747 is not designed to be int...

10 2.3 Power Preparation2.3.1 Installing and Replacing the Batteries Important Notes:• To avoid electric shock when replacing the batteries, turn the power switch off and disconnect the all cables before beginning. Also, after replacing the batteries, always replace the cover before using the unit. ...

12 Important Note:When operating on batteries, the power saver function minimizes battery drain, although a very small amount of current is still required by the tester. Turn the power switch off to completely disconnect the batteries. 2.5 Wall Mounting The supplied Wall-Mount Board allows the 3M ™ ...

13 The ALL setting is described in Section 4.1, “Open Collector Output.” Error Message Meaning Solution 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 val...

14 5. Testing finished in about a second, and the results are displayed as follows: • and symbol appear 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 shoe LED lights either gree...

15 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 eit...

17 Open-Collector Output • When the SIGNAL OUT switch is set to ALL: The output transistor switches on when the results of the shoe and wrist strap test are OK. When making alternating shoe/wrist strap tests, the type of test to be conducted next is indicated by the blinking symbol on the LCD and th...

18 4.2 RS-232C Communications Important Notes:• Always turn the power switch off when making connections. To avoid damage to the Shoes and Wrist Strap Tester 747, do not apply more than the rated voltage and current to the OUTPUT connector. • To avoid damage to the unit, do not short or input voltag...

19 Pin Signal I/O Description 2 RxD IN Receiving Data 3 TxD OUT Sending Data 5 GND GND Signal Ground Other pins are not used. PC Connection The RS-232C signal wires used are as follows (no other lines are used). Cable Connections The 3M ™ Shoes and Wrist Strap Tester 747 connects to the PC through a...

20 5.0 Specifications 5.1 Measurement Section The measurement resistance range is automatically selected from the following according to the actual measured value. The resistance range cannot be set manually. Measurement Resistance Range (0 to 200.0 M Ω ) 2-M Ω Range Max. display value: 2.000 M Ω (0...

21 5.2 General Specifications for the 3M ™ Shoes and Wrist Strap Tester 747 Ambient Operating Conditions The unit should always be operated indoors, max. 6.562’ (2000 m) height Ambient Storage Conditions Do not store or use the unit where it will be exposed to direct sunlight, high temperatures, hig...

22 Important Notes:• Remove the batteries before storage to prevent possible corrosion cause by battery leakage if the Shoes and Wrist Strap Tester 747 will not be used for a long period of time. • When using the AC adapter, remove the batteries from the Shoes and Wrist Strap Tester 747 to prevent c...

23 Problem Items to check Measurement does not start when pressing the touch panel Are the batteries depleted?Is the AC adapter connected? (Sec. 2.3.2)Is the power switch on? (Sec. 2.4) Abnormal measurement values Is the shoe testing plate connected? (Sec. 2.1) Abnormal test results Are the threshol...

25 Testing Wrist Low Limit – Refer to Wrist Test Table 1. Switch on the 3M ™ Shoes and Wrist Strap Tester 747. 2. Select 5 M Ω position on the “Wrist High” switch. 3. Select Wrist position on the “Signal Out” switch.4. Set reference resistor to 630 K Ω . 5. Press down on the “Touch Panel” and observ...

26 Figure 2 : Wrist Strap Test Set-Up 3M ™ COPPER FOIL TAPE RSB 3M ™ SHOES AND WRIST STRAP SENSOR Testing Shoe Ranges Connect the reference resistor to the “Shoe Plate Cable” and the tab of the 3M ™ Copper Foil Tape on the 3M ™ Shoes and Wrist Strap Tester 747 as show in the Figure 2. Testing Shoes ...

27 Shoe Test Table Reference Resistor Wrist High Range Switch Setting Wrist Low Range Switch Setting Wrist Strap Check LED Indicator Test Result LED Indicator Low Limit* ≤ 630 K Ω Ω ≥ 670 K Ω 5 M Ω 100 K Ω Red Green Low OK High Limit ≤ 4.8 M Ω ≥ 5.2 M Ω 5 M Ω 1 M Ω Green Red OK High High Limit ≤ 9.7...