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Using advanced frequency control technique
Constant speed setting and manual speed regulation
Filmed panel with long service life
Automatic increment or reduction depth and depth error will be compensated by itself.
Commercial power or AC generator

The range of speed: 1 to 29.9 meters per minute.
Depth error: ��0.4
Depth range: 0 to 9999.99 meters
Velocity range: 0.5 to 20 meters per minute; its error is��10%��1 LSB.
Power supply: AC220V��10% 50Hz��5%
Continually working time: less than 24 hours
Depth pulse��s unit: 0.25mm per pulse
Work temperature range: -10�J to +70�J
Dimensions: 305��200��220 mm.
Weights: less than 3 kg
Power consumption: less than 1.5kw
Winches series
Main parameters table
names 3000meters frequency control 2000meters frequency control winch 1000meters frequency control winch 300meters frequency control 500meters frequency control winch
types JCH-3000 JCH-2000 JCH-1000 JCH-300 JCH-500
dimensions (unit: mm) 940��800��720 920��680��700 710��620��670 560��490��360 540��400��380
weights 150 kg 120 kg 110 kg 25 kg 18 kg
Motor��s power 2.2 kw 1.5 kw 1.1 kw manual manual
Coders�� pulse No. 1 circle per 4000 1 circle per 4000 1 circle per 4000 1 circle per 4000
Winded length (�X4.65mm) 3100 M 2200 M 1200 M 360 M 700 M
370 (�X7mm rubber cable)
Collecting ring core No. 6 core 6 core 6 core 6 core 6 core

More details pls contact Miss Eva to eva2000aidu(at)gmail.com.
http://www.resistivity-prospecting.com
Skype: Jackie_cf0130
MSN: aidush2008(at)hotmail.com