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Main Applications
By utilizing relevant parameters of apparent resistivity and induced polarization method, the instrument is widely used in many aspects including metal and non-metal mineral resources exploration, energy exploration, city geophysical exploration, railway and bridge engineering exploration, etc.
Search for groundwater, solve the human and animal drinking water issue as well as industrial and agricultural water issue. Determine the hidden safety risk location in reservoir dam foundation and flood-control dyke, find faultage zone and collapse column, landslides, coal mining goaf, search for geothermal and other hydrological, engineering geological exploration.
Accessories made by our factory with 60-channel or 120-channel multiplex electrode switch, also can be used for multi-electrode resistivity survey system.
Technical Specifications
Receiving Part
Measuring Voltage Range: -6000mV~+6000mV
Measuring Voltage Resolution: 0.01 mV
Measuring Voltage Accuracy: (at Vp>10mV)± 5%, ± 1 digit; (at Vp<10mV)± 1%, ± 1 digit
Measured Apparent Polarizability Accuracy: ± 1%, ± 1 digit
Measuring Current Range: 0~5000 mA
Measuring Current Resolution: 0.01 mA
Measuring Current Accuracy: (at Ip>10mA)± 5%, ± 1 digit; (at Ip<10mA)± 1%, ± Digit
Input Impedance: ≥ 50MΩ
Interference Suppression on 50Hz Power Frequency: Better than 80dB
Transmitter Part
Maximum Transmitting Power: 4500 W
Maximum Power Supply Voltage 900V
Maximum Power Supply Current: 5A
Instrument has over-voltage and over-current protection devices
Power Pulse Width: 1-60 seconds, Duty Cycle 1: 1

Model & Name: Â |
DZD-6A Multi-functional Direct Current ( Induced polarization ) Instrument  |
Max. Power Supply Voltage: Â |
900V Â |
Max. Power Supply Current: Â |
5A Â |
Voltage Measuring Range: Â |
±6000mV  |
Voltage Measuring Accuracy: Â |
(Vp>10mV) ±5%, ±1 digit; (Vp<10mV) ±1%, ±1 digit  |
Current Measuring Range: Â |
0.1mA~3000mA Â |
Current Measuring Accuracy: Â |
Ip>10mA) ±5%, ±1 digit; (Ip<10mA) ±1%, ± digit  |
Interference Suppression on 50Hz Power Frequency  |
Better than 80dB Â |
SP Compensation Range: Â |
-1000mV~+1000mV Â |
Instrument Input Impedance: Â |
≥50MΩ  |
Operating Temperature: Â |
-10 °C ~50 °C , 95%Rh  |
Machine Size: Â |
305×200×202mm  |
                        Â

Main Applications
By utilizing relevant parameters of apparent resistivity and induced polarization method, the instrument is widely used in many aspects including metal and non-metal mineral resources exploration, energy exploration, city geophysical exploration, railway and bridge engineering exploration, etc.
Search for groundwater, solve the human and animal drinking water issue as well as industrial and agricultural water issue. Determine the hidden safety risk location in reservoir dam foundation and flood-control dyke, find faultage zone and collapse column, landslides, coal mining goaf, search for geothermal and other hydrological, engineering geological exploration.
Accessories made by our factory with 60-channel or 120-channel multiplex electrode switch, also can be used for multi-electrode resistivity survey system.
Technical Specifications
Receiving Part
Measuring Voltage Range: -6000mV~+6000mV
Measuring Voltage Resolution: 0.01 mV
Measuring Voltage Accuracy: (at Vp>10mV)± 5%, ± 1 digit; (at Vp<10mV)± 1%, ± 1 digit
Measured Apparent Polarizability Accuracy: ± 1%, ± 1 digit
Measuring Current Range: 0~5000 mA
Measuring Current Resolution: 0.01 mA
Measuring Current Accuracy: (at Ip>10mA)± 5%, ± 1 digit; (at Ip<10mA)± 1%, ± Digit
Input Impedance: ≥ 50MΩ
Interference Suppression on 50Hz Power Frequency: Better than 80dB
Transmitter Part
Maximum Transmitting Power: 4500 W
Maximum Power Supply Voltage 900V
Maximum Power Supply Current: 5A
Instrument has over-voltage and over-current protection devices
Power Pulse Width: 1-60 seconds, Duty Cycle 1: 1

Model & Name: Â |
DZD-6A Multi-functional Direct Current ( Induced polarization ) Instrument  |
Max. Power Supply Voltage: Â |
900V Â |
Max. Power Supply Current: Â |
5A Â |
Voltage Measuring Range: Â |
±6000mV  |
Voltage Measuring Accuracy: Â |
(Vp>10mV) ±5%, ±1 digit; (Vp<10mV) ±1%, ±1 digit  |
Current Measuring Range: Â |
0.1mA~3000mA Â |
Current Measuring Accuracy: Â |
Ip>10mA) ±5%, ±1 digit; (Ip<10mA) ±1%, ± digit  |
Interference Suppression on 50Hz Power Frequency  |
Better than 80dB Â |
SP Compensation Range: Â |
-1000mV~+1000mV Â |
Instrument Input Impedance: Â |
≥50MΩ  |
Operating Temperature: Â |
-10 °C ~50 °C , 95%Rh  |
Machine Size: Â |
305×200×202mm  |
The characteristic of alloy steel casting is similar to that of Carbon Steel Casting and cast steel containing alloy elements such as manganese, chromium, and copper is a cast alloy steel. China Alloy Steel Precision Casting is also called lost wax casting, or China Alloy Steel Investment Casting . Casting products are precise, complex, and close to the final shape of the parts, which can be used without processing or with little processing, so It is an advanced technology.
In wax pattern process,we mix stearic acid and paraffin wax in wax pattern making,as you know,it is better than polyethylene,and the wax deformation is small.
In shell making,we adopt automatic sand-covering production line, which was invented under the guidance of our general manager.The indoor temperature was controlled by air-conditions,keeping the temperature at 24℃±1℃, which can make the castings much more stable,the internal tissues much more well-proportioned.
In shell hardening process,we use aluminium chloride to harden the shell.This can make the shell so hard that it can`t be distorted,at the same time the bug which the casting may have will be decreased.If there are letters or numbers in it,they will be much clearer.
In dewaxing process,about 95% of the castings suppliers adopt the original water dewaxing technics,but we using the advanced steam dewaxing technics,which we are very proud of.This can effectively avoid the air-hole and sand-hole,making the casting look much nicer.
In smelt process,we use middle frequency furnace,avoiding the emergence of the oxide; in molten steel control part,we use Germany-imported direct reading spectrometer machine,assuring its quality before the molten steel out of the furnace.During this process we use ERP production and management software to get the feedback information.
In shell-knock out process,we have special machines,which can decrease the hitting and knocking, easily made by manual shell knocking out.
In shot-blasting process,we have crawler-type and hanging shot-blasting machine,with steel shot 0.5-0.8,making the products smooth.Of course,if the customer wants it look much nicer,we also can carry out sand-blast treatment.
In heat treatment process,we use electric furnace,and adopt double-temperature control in order to heat the products equally.As a result, the products will have great metallurgical structure.
Our tolerance can reach at the grade of 5-7 according to our country`s tolerance standard.
In machining process,we have 12 CNC machining centers and some other machines, so we can make further machining if the customers need.
Products in alloy steel cast factory divide into Forklift Parts Investment Casting, Agricultural Machinery Parts Investment Casting, Petroleum Parts Investment Casting, and Chemical Parts Investment Casting.
Alloy Steel Investment Casting
Alloy Steel Precision Casting,Alloy Steel Investment Casting,Alloy Steel Casting,Precision Cast Alloy Steel
Wei fang junlong precision casting Co.,Ltd , https://www.junlongcasting.com