3M 740 Operating Instructions Manual
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3M 740 Operating Instructions Manual

Wrist strap + shoe tester
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3
740 Wrist strap + shoe tester
Operating Instructions
MO 0688-1101
740
wrist strap + shoe tester
<
o.k.
1
2
3
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MO 0688-1101
Nov 2001
1 / 11

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Summary of Contents for 3M 740

  • Page 1 740 Wrist strap + shoe tester MO 0688-1101 Operating Instructions Nov 2001 wrist strap + shoe tester < > o.k. MO 0688-1101 1 / 11...

  • Page 2: Declaration Of Conformity

    II. Declaration of Conformity I. General The 740 Wrist Strap and Shoe Tester is in Personnel grounding devices such as wrist straps conformity with the regulations of the EMC- and conductive footwear are the primary method directive 89/336/EWG.

  • Page 3: Operation

    III. Description IV. Operation The 740 wrist strap and shoe tester is an electronic Connect the AC/DC - transformer (DC 24-30 V, test instrument which is easy to operate and 150 mA) to the 740 tester. designed to be wall mounted. An AC/DC - Note: If you notice a delay in the response time of transformer is supplied.

  • Page 4: Wall Mounting

    3M Dual Lock™ fastening strips to the rear of the 35 MΩ. If a red "< "-LED is on, the current 740 tester to the bottom and top in parallel; see limiting resistor in the ground cord is bypassed drawing for locations.
  • Page 5 The shoe test does not influence the wrist strap test, therefore the shoes can be tested while the wrist strap is still connected to the 740 or the wrist strap can be tested while the operator is standing on the 741 shoe electrode. Both metal plates shall not be pressed at the same time.
  • Page 6 (Example 1) and authorisation control equipment such as electrical door opening systems (Example 2). The output of the 740 will give you permanently + 5 V at pin 3 and DC-return at pin 6. The remaining pins 1, 2, 4 and 5 (open collector) will be high (max.

  • Page 7: Specifications

    Data output connector pin status when testing wrist strap/shoe t l u t l u t l u t l u t s i t s i t s i t s i . k . . k . . k . .

  • Page 8: Calibration Procedure

    X. Calibration Procedure The LEDs will indicate as shown below if the 740 performs within specifications. Repeat this The following procedure can be used to determine procedure for 5, 10 and 35 MΩ-ranges. if the 740 operates within its specifications.
  • Page 9 I) calibration of the single shoe test circuit: II) calibration of the dual shoe test circuits: Connect a reference resistor to the 740 between The 740 Tester measures the resistance of both contact 1 of the socket and the stud as shown shoes almost at the same time.
  • Page 10 3M 740 Wrist Strap + Shoe Tester Logbook 1 2 3 4 5 6 7 8 9 W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S W S...

  • Page 11: Important Notice To Purchaser

    Limit of liability-in no event will 3M or seller be responsible or liable for special, incidental, or consequential losses or damages, whether based in tort or contract. Fulfillment of 3M’s warranty obligations will be customer’s exclusive remedy...

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