Electromagnetic Method Instrument, Type CLEM-V
- Rectifier
- Magnetic probe
- Receiver
- Transmitter
● Exploration of deep underground metal and nonmetal mineral resources.
● Exploration of geothermal and groundwater resources.
● Exploration of oil and gas resources.
● Investigation of mined-out area of coal mine, Karst development and civil air defense constructions.
● Investigation of active faults and research in crust and earthquake.
● Inspection of highway and railway subgrades.
● Monitoring and inspection of environment pollution.
The electromagnetic method instrument is composed by a KD30-1 rectifier, a CLEM-T30 high power electromagnetic method transmitter, a CLEM-R5 array electromagnetic method receiver, magnetic sensor and processing software etc.
FunctionBy the compound array detection that combines natural and artificial source field electromagnetic methods, the electromagnetic method instrument can conduct:
1. CSAMT
2. AMT
3. TDIP
4. FDIP
5. SIP
6. CR
| Frequency Range | 8000Hz~1/128Hz |
| High density frequency | 20 frequencies per magnitude order |
| Maximum voltage | 1000V |
| Maximum current | 30A |
| Maximum power | 30kW |
| Power waveform | Multi-frequency, single-frequency |
| Operating modes | automatic or manual |
| Protection function | Overvoltage, overcurrent and overheat protection |
| GPS synchronization accuracy | UTC±20nS |
| OCXO synchronization accuracy | 4μS/h ±0.081μS |
| Volume | 660*440*440mm |
| Weight | 43kg |
| Frequency Range | 32kHz ~ 1/128Hz |
| Channels number | 1 to 8 optional |
| Controller | PC-104,300M main frequency |
| Storage Media | DOC (2GB) |
| GPS Synchronization Accuracy | UTC ± 20nS |
| OCXO synchronization accuracy | 4μS/h ±0.081μS |
| Channel Gain | 1,4,16,64,256 five pre-amp gains 1,2,4,8 main-amp gains |
| Volume | 340*210*250mm |
| Weight | 7.5kg (lithium battery included) |
1. CLEM-T30 high power electromagnetic method transmitter
Multi-function transmission: The transmitter is capable of CSAMT, TDIP, FDIP, SIP and CR high-power transmission.
Single-frequency and multi-frequency power: The transmitter can measure multiple parameters, improving work efficiency.
Automatic sweep-frequency power: Power is automatically switched according to the set frequency, with no need for manual intervention.
High-accuracy GPS+OCXO synchronization: Without cumulative time drift, the transmitter can realize all-day accurate synchronized powering.
CPLD control technique: Software and hardware upgrade are allowed.
2. CLEM-R5 array electromagnetic method receiver
Multi-parameter measurement: The receive can conduct AMT, CSAMT, TDIP, FDIP, SIP and CR methods measurement.
Array observation: Receivers can operate singly or they can form an array and cooperate in a wireless network.
Automatic measurement: Automatic measurement can be applied to all methods, saving manpower and improving efficiency.
Synchronization: Without cumulative time drift, the high-accuracy GPS+OCXO synchronization can realize all-day accurate synchronized measurement.
Double ADC: There is a high-speed and a low-speed 24-digit ADC for each channel.
FPGA control technique: Software and hardware upgrade are allowed.
