Measurement Section | 3M 747 instruction

5.0Specifications

5.1Measurement 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 MΩ)

2-MΩRange	Max. display value: 2.000	MΩ (0.001 - MΩ resolution)
20-MΩRange	Max. display value: 20.00	MΩ (0.01 - MΩ resolution)
200-MΩRange	Max. display value: 200.0	MΩ (0.1 - MΩ resolution)

Testing Thresholds

Shoes Test	Lower Threshold resistance: 100 kΩ or 1 MΩ
	Upper Threshold resistance: 10,	35 or 100 MΩ
Wrist Strap Test	Lower Threshold resistance: 0.65 MΩ
	Upper Threshold resistance: 15,	10 or 35 MΩ

rdg. (displayed or indicated value)

This signifies the value actually being measured, i.e., the value that is currently indicated or displayed by the measuring instrument.

dgt. (resolution)

Signifies the smallest display unit on a digital measuring instrument, i.e., the value displayed when the last digit on the digital display is “1.”

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Image 21

3M 747 manual Measurement Section, Measurement Resistance Range 0 to 200.0 MΩ

Contents

3M Shoes and Wrist Strap Tester Table of Contents Inspection Introduction Intended Use Explanation of Safety Label Signal Words & SymbolsPage Product Outline Overview LCD Indicators Back Side Side Panels Connecting the ESD Shoe Testing Plate Preparation Before Testing Shoes Power Preparation Installing and Replacing the Batteries Turning Power Off Turning Power On and OffPower Saver Function AC Adapter Connection Wall Mounting Testing ESD Shoe Testing with the 3M Shoes and Wrist Strap Tester ALL setting is described in .1, Open Collector Output Important Note Use single-conductor wrist straps only Open Collector Output External Output Function Test Result Output Settings Test Result Output TerminalInternal Circuit Open-Collector Output Shoe and Wrist Strap ALL Setting RS-232C Communications Specifications PC Connection Cable ConnectionsPC System Requirements Measurement Resistance Range 0 to 200.0 MΩ Measurement Section Battery Replacement Indicator Maintenance & Service LCD can display the following error messages Error Messages Cleaning Testing ConsiderationsOperational Verification Test Testing Wrist Strap Ranges Equipment RequiredTest Set-Up Testing Wrist Low Limit Refer to Wrist Test Table Testing Wrist High Limits Refer to Wrist Test TableWrist Test Table Testing Shoes Low Limits Refer to Shoes Test Table Testing Shoe Ranges Shoe Test Table Regulatory InformationWeee Statement CULus Statement FCC Electronic Solutions Division Static Control Products