Zonge ZT-30 Geophysical Exploration Transmitter & MX-30 ZeroTEM and MX-30 Deep Mining Geothermal Petroleum Start Price USD 5,000.00 Current Price USD 5,000.00 Time Left - Bid Count 0 Buy It Now Price USD 6,000.00 Reserve Price - Start Time Wednesday, November 26, 2008 End Time Saturday, December 06, 2008 Location Boulder Creek, CA 95006 See more about 'Zonge ZT-30 Geophysical Exploration Transmitter & MX-30' Description Zonge ZT-30 ZeroTEM Transmitter  with MX-30 Electrode Multiplexer for Exploration SurveysTransient Electro-Magnetic TEM transmitter136 Vdc max @ 30 amps Low Current Transmitter for TD & FD Resistivity / IP, 400 Vdc max @ 7 amps According to our research, Zonge transmitters can transmit either frequency domain (100% duty cycle) or time domain (50% duty cycle) waveforms. Transient Electro-Magnetic (TEM) transmitters are suitable for surveys ranging from laboratory-scale (eg cores) to deep mining, geothermal, or petroleum exploration. Zonge equipment is used in for electrical prospecting techniques by mining exploration clients and geophysics researchers.Operating from a DC power source , the ZeroTEM (ZT-30) transmitter can switch currents as high as 30A into inductive or resistive loads. Two or more 12 Vdc automotive batteries connected in series provide DC power when the ZT-30 is used as a TEM transmitter. The ZT-30 is also being used as a low power resistivity /IP transmitters for applications where precision current regulation is not required or when the current waveform can be directly measured. The ZT-30 transmitter is small and easily transportable by one person. It is most appropriate for use in TEM surveys where the targets of interest are less than 500m. The ZT-30 is a battery-powered transmitter capable of producing time-domain or frequency-domain waveforms into either resistive or inductive loads. As a TEM transmitter, the ZT-30 can deliver up to 30A into a 100m loop with a turnoff time of less than 200 μs. Because the ZT-30 also performs well while transmitting into resistive loads, some customers are using it as a low-power resistivity transmitter. When used for resistivity, it is necessary to monitor the current since the transmitter does not have current regulation circuitry.FEATURES OF THE ZT-30 Transmitter· Bipolar current output up to 30 A· 50 or 100% duty cycle· 1 microsecond turnoff into resistive load· Less than 150 microseconds turnoff into a 100meter loop at 20 amperes· Lightweight, battery poweredTEM transmitter, 136 Vdc max @ 30 ampsLow current transmitter for TD & FD Resistivity / IP,400 Vdc max @ 7 amps For more information please see this Zonge Transmitter PDF file.We have no means to fully test this instrument. It still had a charge, so we were able to power it on. The display responds to push button inputs. It appears to be in good physical condition with light surface wear from prior use. The front panel screws are missing. It is offered as is, as pictured. We don't know how long it will remain charged. There is no battery charger included.Also included with this transmitter is the Zonge MX-30 Electrode Multiplexer. According to our research, Zonge Engineering has been involved in the development of instruments for electrical resistance tomography (ERT). ERT isbeing used to generate resistivity images of the “plane” defined by the space between two boreholes or other electrode strings. ERT is presently being applied to monitor leakage at hazardous waste sites, to monitor dynamic fluid injection processes that are often involved in waste site remediation.The MX-30 Electrode Multiplexer performs 2 multiplexing functions under external control. First, it is able to switch each of the two transmitter lines to one of 30 possible electrodes. Secondly, it is able to select any pair of electrodes not connected to a current electrode and route the differential signal toone of 16 possible differential output channels. The MX-30 is configured with commands received through a serial RS-232C data port.FEATURES OF THE MX-30 ELECTRODE MULTIPLEXER• Selectable Electrode String – 30 electrodes Max• External Control – RS-232C Serial (4800,N,8,1)• Signal Output Channels (differential) – 16 Max• Transmitter Output Relay Specs - ±500 Vdc 5 A• Transmitter/Receiver Channel Isolation – 1000V• High Speed Optical Relays on Receiver MUX• Fully compatible with GDP-32II Receiver• MX-30’s may be cascaded together to addressseveral electrode arraysFor more information please see this Zonge Multiplexer PDF file.We have no means to test this multiplexer. It appears to be in good physical condition with light surface wear from prior use. It is offered as pictured. Payment Information We accept PayPal. Please let us know your payment preferences and shipping address. California residents please add in sales tax of 8%. If you are not a PayPal member, please contact us to discuss other payment options. Shipping Information We ship worldwide! We welcome our international customers!  Please write for international shipping quotes as this is a heavy item and can't ship via USPS. We welcome university customers! Buyer pays for shipping/packaging. We provide combined shipping discounts. Please note that calculated shipping is based upon UPS, however we reserve the right to ship for the same cost via FedEx, USPS or another carrier. We usually pack and ship once a week. If you require expedited shipping, please let us know and we can provide optional costs for faster service. Return Policy Your satisfaction is guaranteed. Buyer has a 3 day right of inspection. Please contact us within 3 business days of receipt of item to authorize any returns. 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