3m 701 User Manual

Operator’s Manual

701 Test Kit for Static Control Surfaces (Megohmmeter)

INTENDED USE

The 3M Model 701 Megohmmeter is designed to measure the resistance of static control work surfaces and flooring. This is to be done in a manner as described in this operator's manual. Measurements described in this manual refer to the ESD Association Standards S4.1 (Worksurfaces-Resistive Characterization) and S7.1 (Floor Materials-Resistive Characterization of Materials). These standards are available from the ESD Association (315-339-6937). Refer to the operator’s manual for complete use of this instrument. Use of other components may cause improper performance and or an unsafe condition.

SAFETY SYMBOLS

This marking adjacent to another marking or a terminal or operating device indicates that the operator must refer to an explanation in the Operating Instructions to avoid damage to the equipment and/or personal injury.

WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. It also may be used to alert against unsafe practices that may cause property damage.

SAFETY INFORMATION

The Operator’s Manual contains cautions and warnings alerting the user to hazardous operating and servicing conditions. This information is flagged by CAUTION or WARNING headings throughout this publication, where applicable, and is defined in this manual under SAFETY SYMBOLS. To ensure the safety of operating and servicing personnel and to retain the operating integrity of this Instrument, these instructions must be adhered to.

INTRODUCTION

DESCRIPTION

The Model 701 Test Kit for Static Control Surfaces includes a hand-held megohmmeter (here-in after referred to as the “Instrument” or “Model 701”) and accessories. The kit has been specifically designed for evaluating the resistive characteristics of static control surface materials and testing installed surfaces as specified in ESD Association Standards.

The Instrument has four test functions which allow the user to measure the resistance of a static control surface at either of two test voltages, verify proper Instrument performance, and check the electrical continuity of the test set-up.

ACCESSORIES

All accessories required for operating the Model 701 are included in the test kit. Available replacement parts are listed on page 6.

UNPACKING AND INSPECTION

Examine the shipping carton for obvious signs of damage. If damage is suspected, open the carton and inspect the Instrument for possible damage. If damage is noted, notify the carrier and supplier immediately. If the Instrument appears to be in good condition, read this Operator’s Manual in its entirety. Check that all items are included with the Kit, then run a series of familiarity tests as instructed in this manual.

CONTROLS, CONNECTORS, AND INDICATORS

GENERAL

Before attempting any operation of the Instrument, become familiar with each control. A thorough understanding of how the Instrument operates will avoid undue mistakes and prolong its useful life.

Figure 3-1. Controls, Connectors, and Indicators

1. Main Selector Switch:

Main function selector switch allows selection of desired test function.

2. TEST Button:

This button engages the Instrument and activates the test function selected.

3. OHMS Scale:

This scale is used in conjunction with the SURFACE TEST functions to indicate the amount of resistance measured.

4. CONTINUITY Scale:

This scale indicates the total resistance of the test set-up (meter, leads, weights, and calibration plate) in the CONTINUITY TEST function.

5. BATTERY Scale:

This scale indicates the charge level of the main battery of the Instrument in the BATTERY TEST function by verifying the open circuit output test voltage.

6. Test Jacks:

These jacks are used to connect the Instrument to the test leads.

• Turn off the Instrument before connecting or disconnecting test leads, or before moving test weights.

• Do not use this Instrument with any accessories not specifically designed to be used with this product.

• Do not use this Instrument to measure live circuits.

• The circuitry enclosed in the Model 701 produces high voltages. Make sure that the main selector switch is in the OFF position before removing the back cover.

• Product intended for indoor use only.

• The test weights included in this kit are heavy. Exercise care in handling.

• Improper battery installation will damage this instrument.

7. Mechanical Zero Adjust:

This control is used to zero the pointer.

OPERATING INSTRUCTIONS

• Turn off the Instrument before connecting or disconnecting test leads, or before moving test weights.

• Do not use this Instrument with any accessories not specifically designed to be used with this product.

• Do not use this Instrument to measure live circuits.

• The test weights included in this kit are heavy. Exercise care in handling.

NOTE: The following procedures should be followed each time the Model 701 is used.

BATTERY TEST

Place the Instrument on a table top or other stable surface. Set the main selector switch to BATTERY TEST. Press TEST and hold for 15 seconds. The pointer should come to rest in the green area of the BATTERY scale. If the pointer is in the red area to the left of 100V, replace the battery and retest. If the pointer is in the red area to the right of 100V, the Instrument may need recalibration.

CONTINUITY TEST

Place the Instrument on a table top or other stable surface and attach the leads as shown in Figure 4-1. Place the test weights on the calibration plate or other bare metal surface and plug in the test leads. Set the main selector switch to CONTINUITY TEST. Press TEST. The pointer should come to rest in the green section of the CONTINUITY scale. If not, the test leads may be defective or the weights may require maintenance or cleaning.

SURFACE TEST (Resistance Measurement)

Refer to the immediate two following sections to determine which measurement(s) should be used for your application. Place the Instrument on a table top or other stable surface

and attach the leads as shown in the appropriate sketch figures 5-1 through 5-5. Set the Main Selector Switch to the desired SURFACE TEST voltage. Place the test weight(s) on the surface to be tested and connect the test leads. Press TEST for 15 seconds and then read the resistance from the OHMS scale. After all readings have been completed, return the Main Selector Switch to the OFF position.

RESISTIVE CHARACTERIZATION OF STATIC CONTROL WORK SURFACES

GENERAL

This section provides a summary of the types of surface measurements specified and described by ESD-S4.1. Measurements are performed for three reasons:

1. Periodic performance testing of installed static control work surfaces.

2. Qualification of installed static control work surfaces.

3. Evaluation of static control work surface materials.

NOTE: The following paragraphs are offered as a condensed summary of the test methods and procedures outlined in the EOS/ESD standard. For complete details, refer to the standard.

TEST DESCRIPTION

1. PERIODIC PERFORMANCE TESTING OF INSTALLED STATIC CONTROL SURFACES

(Measurement of resistance from the top of an installed surface to ESD GROUND (R

TS-ESDG

) at ambient temperature and humidity): Note: ESD GROUND is the point at which the ground cord or other grounding conductor from the static control surface is connected to. The ground point may be an electrical ground, building ground, or other suitable ground. If you have questions concerning the correct ground, refer to EOS/ESD STANDARD S6.0 and/or contact a qualified electrician.

This Resistance-to-Ground test is the most important test that can be done on a static control surface because it verifies that the surface is working correctly and will

Figure 4-1: Continuity Test

TEST WEIGHTS

CALIBRATION

PLATE

Figure 3-1: Front Panel

OHMS

100G

10M

100M

10M

100M

10G

FAIL

100V

BATTERY

OFF

TEST

CONTINUITY

TEST

READ MANUAL BEFORE USE

10V

100K

100V

100K

10K

CONTINUITY

TAUT BAND

SUSPENSION

SURFACE

TEST

10G

100G

CONTINUITY

TEST

OHMS

10M

100M

10M

100M

FAIL

100V

BATTERY

OFF

10V

TEST

READ MANUAL BEFORE USE

100K

10K

PAS

CONTINUITY

TAUT BAND SUSPENSION

SURFACE

TEST

100V

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