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TEM57-MK2 TRANSMITTER

The TEM57-MK2 Transmitter is the upgraded version of the TEM57, and combined with the PROTEM receiver are the principal components of the PROTEM 57-MK2 system. The design and performance of the TEM57-MK2, with increased power of 1,500 W from an internal power supply, makes it a highly portable, powerful mid-range time domain transmitter. The internal power supply has variable voltage range from 18 to 60 V so that it can be precisely matched to the transmitter loop for optimum performance. An external battery supply increases performance to 3,800 W and 160 V.

The TEM57-MK2 is the perfect mid-range power transmitter for sounding depth, thickness and conductivity of geologic layers down to 500 metres for a wide variety of applications such as mapping of aquifers and aquitards, water quality and stratigraphy. In coastal area, the PROTEM 57-MK2 system has defined depth to saline intrusion as accurately as chemical well samples.

The PROTEM 57-MK2, with a short reference cable, portable transmitter and 3-D receiver coil, can delineate complex ore bodies within 200 m of surface. Deeper conductors can be characterized by profiling with a crystal-synchronized receiver and a large, fixed transmitter loop. Modelling provides conductivity, thickness, dip and extent of the ore body.

Specifications
CURRENT WAVEFORM
  Bipolar rectangular current with 50% duty cycle
BASE FREQUENCY
3, 7.5, or 30 Hz where powerline frequency is 60 Hz
2.5, 6.25, or 25 Hz where powerline frequency is 50 Hz
Rates below 1 Hz available from PROTEM receiver through reference cable
TURN-OFF TIME
20 to 115 µs, depending on size, current and number of turns in transmitter loop
TRANSMITTER LOOP
Single turn: any dimension; minimum resistance is 0.7 ohms, up to 300 x 600 m.
8-turn: 5 x 5 or 10 x 10 m
OUTPUT CURRENT
18 to 60 V continuous control with motor generator; up to 160 V (3,800 W) with external power supply
SYNCHRONIZATION
Reference cable or, optionally, quartz crystal
POWER SUPPLY
1,800 W, 110/220 V, 50/60 Hz single-phase motorgenerator or, optionally, multiple 12 V batteries
TRANSMITTER PROTECTION
Electronic and electromechanical protection
DIMENSIONS
43 x 25 x 25 cm
WEIGHT
15 kg


 
             
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