Professional Land SN388 Telemetry Geophone cable geophysical instrument

1.

Component

2TP ,4GP,1P ,1 strengthen line

2.

Operating temperature range

-50 deg.a to+75deg.c

3.

Storage temperature range

-55 deg.a to+85deg.c

4.

Flexibility

A circular loop 12 cm inner diameter will be Squash by at least 1.05cm when submitted to a radical force of 5 N.

5.

Cylindricity

The maximum difference between any diameters measured on any section of 50mm in length do not exceed 0.3mm

6.

Maximum diameter

TBD(8.9mm,9.8mm)

7.

Outer Jacket material

Polyurethane (PU)

8.

Jacket thickness MIN

1.2mm

9.

Max length

TBD(330m,165m,180m)

10.

Colour

TBD(Orange,Blue,Orange red)

11.

Anti-draught Strength

1100 N

12.

Water proof

no

Transmission Pairs

2 Pairs

13.

Attenuation

<7.0dB/100m 10MHz

14.

Reflection Coeff

<0.09 2~12MHz

15.

Impedance measured on 100m

145+/-13OHMS

16.

Conductor

7/0.18 Strand copper

17.

Diameter of insulation

1.55(±0.02) mm

18.

Near-end Cross talk from 2 to 8 MHz measured on 100m

>60dB

19.

Geophone pairs

20.

Conductor and Min Cross section

7/0.16mm Strand copper

21.

Diameter of insulation

0.8(±0.02) mm

22.

Far-end Cross talk At 100MHz measured on 100m

>100dB

23.

Resistance

<160Ohms/Km

Power pairs

1 Pair

24.

Cross section

19/0.30 copper

25.

Resistance on Power Pair

<14.2Ohms/km

26.

Diameter of insulation

TBD(2.2±0.1,2.6±0.1)

Take-outs

27.

Take-outs connect type

Water proof connection with KCK-2M

28.

NO. of take-out

6

29.

Type of take-out

Pig tail type KCK-2M

30.

Space of take out

55 m apart ant the nearest is 27.5 away from connector

31.

NO. of conductor of take-out wire

2