3M 701 Руководство по эксплуатации - Страница 7

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B. Before testing new floor mats or newly installed floors,

clean mats/floors per manufacturer's recommendations.

For testing of floor finishes or monitoring of existing

floor materials, test in an as-is condition.

C. Perform tests at ambient humidity.

D. Place the Instrument and test weight at the desired test

location.

E. Connect one lead of the meter to ground with supplied

clip and the other lead to the test weight.

F. Set meter to 100V. Place test weight on the surface of

the material being tested.

G. Push test button and record the resistance after the

measurement has stabilized or after 15 seconds. Release

test button.

H. Repeat the procedure placing the test weight on the

surface at different locations.

I. Perform a minimum of five tests per contiguous floor

surface material or a minimum of five tests per 5,000

square feet (464,5 m

) of floor material, whichever is

greater. A minimum of three of the five tests should be

conducted in those areas that are subject to wear or have

chemical or water spillage or are visibly dirty.

TEST PROCEDURE FOR RESISTANCE

POINT TO POINT

A. Complete BATTERY TEST and CONTINUITY TEST.

If required clean electrodes as described in Test Weight

Cleaning section below.

B. Before testing new floor mats or newly installed floors,

clean mats/floors per manufacturer's recommendations.

For testing of floor finishes or monitoring of existing

floor materials, test in an as-is condition.

C. Perform tests at ambient humidity.

D. Place the Instrument and test weight at the desired test

location.

E. Connect test leads of the meter to the test weights.

F. Set meter to 100V. Place test weights three feet apart on

the surface of the material being tested.

G. Push test button and record the resistance after the

measurement has stabilized or after 15 seconds. Release

test button.

H. Repeat the procedure placing the test weights three feet

apart on the surface at different locations.

I. Perform a minimum of five tests per contiguous floor

surface material or a minimum of five tests per 5,000

square feet (464,5 m

) of floor material, whichever is

greater. A minimum of three of the five tests should be

conducted in those areas that are subject to wear or have

chemical or water spillage or are visibly dirty.

MAINTENANCE

GENERAL

This section details the maintenance which may be

performed by the user. Performance by the user of any

maintenance not specified here will void the Instrument

warranty. If it is determined that maintenance beyond the

scope of this section is required, contact your local 3M sales

representative or call 3M Technical Service (Electronic

Handling & Protection Division) at 512-984-3200.

Figure 6-1: Battery Replacement

BATTERY REPLACEMENT

Before attempting to replace either battery, place the main

selector switch in the OFF position.

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.

A. To open the back cover, remove the screw located in the

center of the back cover.

B. The batteries are held in place by a metal bracket at the

top of the Instrument. To release this bracket, turn the

screw located in the center of the bracket counter

clockwise until the bracket swings free. The batteries

will now slide out.

C. Install new batteries as shown in Figure 6-1.

Improper battery installation will damage this Instrument.

D. Replace bracket and tighten bracket screw. Replace back

cover and cover screw.

TEST WEIGHT CLEANING

The test probes included in this kit are heavy. Exercise care in

handling.

After a period of use, the conductive rubber pads on the test

weights may become soiled, causing the weight to fail the

CONTINUITY TEST. To clean the surface of the

conductive pad, use a 70% Isopropyl alcohol/water mixture

on a clean low-linting cloth. Allow surface to "air dry" 15

minutes before use.

ZERO ADJUSTMENT

On occasion, due to handling, vibration, or other causes, the

pointer on the Model 701 may need adjustment. To zero the

pointer, turn the main selector switch to the OFF position.

Place the Instrument on a level stable surface and turn the

mechanical zero adjust screw until the pointer is over the

left-most mark on the OHMS scale.