Instruction/ maintenance manual of the product 747 3M
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User ’ s Guide 3M ™ Shoes and Wris t S tr ap T ester 7 4 7.
1 T able of Contents Section Page Introduction ......................................................................................................................................2 Inspection .........................................................
2 Introduction Thank you for purchasing this 3M ™ Shoes and Wrist Strap T ester 747. T o get the maximum performance from the unit, please read this user’ s guide first, and refer to it as needed. Inspection The AC adapter pro vided with the Shoes and Wrist Strap T ester 747 varies according to region.
3 SAFETY INFORMA TION Read , understand and follo w all safety infor mation before operating this equipment. Retain this User’ s Guide for future reference.
4 Do not use power supply to power unit in Europe. Unit is intended to be powered by non-rechargeable battery and input connector is not to be used. T o 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.
5 1.0 Overview 1.1 Product Outline T o 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 T ester 747 is not designed to be intrinsically safe.
6 1.2 Part Names of the 3M ™ Shoes and Wrist Strap T ester 747 1.2.1 Front Panel 1. T est Result LEDs – Indicates test results according to specified threshold resistance. 2. LCD – Sho ws measurement values and test location status. 3. T est Location LEDs – Indicate the test location and status.
7 1.2.2 Side Panels 1. P o w er Switch – T ur ns the 3M ™ Shoes and Wrist Strap T ester 747 on and of f. 2. Threshold Resistance Selection Switches – Select the threshold resistances for shoes and wrist strap tests. 3. T est Result Output Selection Switch – Selects which test results are present at the OUTPUT terminal.
8 2.0 Preparation Before T esting 2.1 Connecting the ESD Shoe T esting Plate T o 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 T ester 747 is not designed to be intrinsically safe.
9 2.2 Threshold Resistance Settings for the 3M ™ Shoes and Wrist Strap T ester 747 The test results indicated b y the front panel LEDs are deter mined by comparison of the measured value with the threshold resistance settings (upper and lo w er limits).
10 2.3 Power Preparation 2.3.1 Installing and Replacing the Batteries Important Notes: • T o avoid electric shock when r eplacing the batteries, turn the pow er switch off and disconnect the all cab les befor e beginning . Also, after r eplacing the batteries, always r eplace the co ver befor e using the unit.
11 2.3.2 AC Adapter Connection This 3M ™ Shoes and Wrist Strap T ester 747 can be operated from six “ AA” alkaline batteries or the supplied AC adapter . The A C adapter has priority , so when the batteries are installed and the adapted is connected , battery po w er is not drained.
12 Important Note: When oper ating on batteries, the pow er saver function minimizes battery dr ain, although a very small amount of curr ent is still requir ed by the tester .
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.
14 5. T esting finished in about a second , and the results are display ed as follo ws: • 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 v alue and thresholds).
15 4. T esting finished in about a second , and the results are display ed as follo ws: • 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).
16 T est Result Output T erminal Mating Plug (stereo mini-phone) Mating Plug Size: 14 mm by 13.5 mm diameter Open Collector Output Ratings Internal Circuit Important Note: Mating plus not included. Please ensur e that the plus used is of the type indicated abo ve.
17 Open-Collector Output • When the SIGNAL OUT s witch is set to ALL: The output transistor switches on when the results of the shoe and wrist strap test are OK. When making alter nating shoe/wrist strap tests, the type of test to be conducted next is indicated b y the blinking symbol on the LCD and the blinking LED .
18 4.2 RS-232C Communications Important Notes: • Always turn the pow er switch off w hen making connections. T o avoid damag e to the Shoes and Wrist Str ap T ester 747, do not apply more than the r ated voltage and curr ent to the OUTPUT connector .
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 follo ws (no other lines are used). Cable Connections The 3M ™ Shoes and Wrist Strap T ester 747 connects to the PC through a crosso ver cab le.
20 5.0 Specifications 5.1 Measurement Section The measurement resistance range is automaticall y selected from the follo wing according to the actual measured v alue. The resistance range cannot be set manually . Measurement Resistance Range (0 to 200.
21 5.2 General Specifications for the 3M ™ Shoes and Wrist Strap T ester 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, high humidity or condensation.
22 Important Notes: • Remove the batteries bef or e stor age to pr event possible corr osion cause by battery leakag e if the Shoes and Wrist Strap T ester 747 will not be used for a long period of time.
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.
24 Equipment Required • Resistance Substitution Bo x (RSB) – 630 K Ω to 103 M Ω (minimum range) ± 1% or discrete resistors ± 1%, using resistor v alues as indicated in the tabled belo w . • Lead wires – As required to connect between RSB and the 3M ™ Shoes and Wrist Strap T ester 747.
25 T esting Wrist Low Limit – Refer to Wrist T est T able 1. Switch on the 3M ™ Shoes and Wrist Strap T ester 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 .
26 Figure 2 : Wrist Strap T est Set-Up 3M ™ COPPER FOIL TAPE RSB 3M ™ SHOES AND WRIST STRAP SENSOR T esting Shoe Ranges Connect the reference resistor to the “Shoe Plate Cable” and the tab of the 3M ™ Copper F oil T ape on the 3M ™ Shoes and Wrist Strap T ester 747 as show in the F igure 2.
27 Shoe T est T able Reference Resistor Wrist High Range Switch Setting Wrist Low Range Switch Setting Wrist Strap Check LED Indicator T est 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.
28 FCC This equipment has been tested and found to compl y with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to pro vide reasonab le protection against harmful interference in a residential installation.
Important Notice All statements, technical information, and recommendations related to 3M’ s products are based on information believed to be reliable, but the accuracy or completeness is not guaranteed. Before using this product, you must evaluate it and determine if it is suitable for your intended application.
An important point after buying a device 3M 747 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought 3M 747 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data 3M 747 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, 3M 747 you will learn all the available features of the product, as well as information on its operation. The information that you get 3M 747 will certainly help you make a decision on the purchase.
If you already are a holder of 3M 747, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime 3M 747.
However, one of the most important roles played by the user manual is to help in solving problems with 3M 747. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device 3M 747 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
