Aktek AT300 Manual del usuario - Página 14

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5 Servicing

When the hardness tester appears some other abnormal phenomena, please do not

dismantle or adjust any fixedly assembled parts. Fill in and present the warranty card to us.

The warranty service can be carried on.

6 Transport and Storage

1) Keep it away from vibration, strong magnetic field, corrosive medium, dumpiness and

dust. Storage in ordinary temperature.

2) With original packing, transport is allowed on the third grade highway.

Appendix A Sound Velocities

Steel, common

Steel, stainless

Epoxy resin

Polystyrene

Quartz glass

Rubber, vulcanized

Material

Aluminum

Brass

Copper

Iron

0.173-0.229

Cast Iron

Lead

Nylon

Silver

Gold

Zinc

Titanium

Tin

Ice

Nickel

Plexiglass

Porcelain

PVC

Teflon

Water

Sound Velocity

In/us

m/s

0.250

6340-6400

0.233

5920

0.226

5740

0.173

4399

0.186

4720

0.233

5930

4400－5820

0.094

2400

0.105

2680

0.142

3607

0.128

3251

0.164

4170

0.236

5990

0.117

2960

0.100

2540

0.157

3988

0.222

5639

0.106

2692

0.092

2337

0.230

5842

0.094

2388

0.222

5639

0.091

2311

0.056

1422

0.058

1473