We are agent which representing geophysical Instruments proton magnetometer, located in Jakarta Timur. It’s an omni direction magnetometer
Long term experience and customer feedback enabled the Geotron design team to produce a magnetometer
which offers specifications equal to any other proton precession instrument. Apart from the technical excellence,
however, the G5 is one of the simplest memory magnetometers to operate. Conceived, designed and
produced with increased operator productivity as our main goal, the G5 magnetometer incorporates the following
ergonomic design features:
The front panel incorporates an 80 character, 2 line alpha numeric liquid crystal display, easy to read even in
Switch-on and -off is by inserting the sensor or download cable in it’s socket.
This means that the instrument cannot easily be left on by accident and run the batteries down.
Operation of the magnetometer is via menus. There are no complicated set-up or other procedures to
remember. Nor are there any codes or abbreviations used to confuse the operator. The main menu structure is
Read = 1, Tune = 2, Position = 3, Recall = 4, Dump = 5,
Erase = 6, Mode = 7, Set clock = 8, Stats = 9.
All menu choices are made via numeric entries. Where the operator is required to enter data, for example a line
number, the prompt message is clear and unambiguous. A standard keystroke sequence is used to enter all
data. To return to the main menu, a “MENU” key is provided.
The keyboard on the front panel is a 15-key membrane pad with tactile feedback, so that the operator is sure
whether or not a key has been pressed. The following keys are provided: Digits from zero to nine, minus,
CLEAR, STORE, MENU, and READ.
EASE OF OPERATION
At the start of every reading cycle, the G5 displays the battery level and the tuning level. This allows the operator
to monitor these critical factors continuously. When a low battery condition does occur, this fact is immediately
brought to the attention of the operator. No data will be lost as a result of battery replacement in the middle of a
For every reading taken, the signal strength and the change from the previous reading is displayed on the front
panel. This enables the operator to check the quality of the data obtained.
In manual mode, the operator has to make an explicit selection whether or not to store a reading. This prevents
the inadvertent recording of “noisy” or invalid data. Only once a reading has been accepted does the G5
increment or decrement the station number, ready for the next reading. Until such time, multiple readings may be
taken at the same station.
The G5 offers the option of automatic tuning to the signal received. Using this option enables the operator to
obtain maximum signal strength despite sharp changes in magnetic gradient. When the instrument is used in
auto mode, the automatic tuning option ensures that data quality remains high.
In auto mode, readings will only commence at a time which is an integral multiple of the reading interval chosen.
The data is stored automatically, obviating the need for an operator to be in attendance when using the G5 as a
base station during a survey.
The GEOTRON model G5 proton magnetometer is an advanced portable instrument, both technically and ergonomically. It is well suited to its principle applications in:
The usefulness and application of the G5 is enhanced by the following technical design features:
Range 20 to 100 microtesla
Resolution 0,1 nanotesla
Accuracy Better than 1 nanotesla
Sensor type Dual coil, omnidirectional above 10° inclination
Tolerable external gradient 4000 nanotesla per meter
Cycle time Manual mode: 2 sec minimum
Auto mode : 4 to 999 Sec, 1 to 999 mm
Tuning Automatic or manual
Display 80 character, 2-line, alphanumeric, liquid crystal
Temperature range -10 0C to 50 0C
Power requirements 18 Volts DC
Power supply Lead-acid rechargeable batteries, 6 volt, 3 Ah
Charger Constant current – constant voltage system with 220/110V
AC and 10-15V DC inputs.
Physical – Instrument Height : 220 mm
Width : 230 mm
Length : 110 mm
Mass: 2.5 kg
Physical – Sensor Diam : 75 mm
Length : 160 mm
Mass : 1.2 kg
Physical – Six sensor poles
Diam : 25 mm with 0.625 inch WW thread
Length: 400 mm each
Mass : 0.113 kg each
Physical – Charger Height : 160 mm
Width : 80 mm
Length: 80 mm
Mass : 0.75 kg
Maximum memory capacity 14 000 readings depending upon field conditions
Digital data output Via RS-232 (serial) port at 9600 baud
Finishes Instrument: Anodized and painted aluminum
Sensor poles: Anodized aluminum
Sensor: PVC case
In/Output connection Plug-in switch-on type
Harness Canvas with front pouch for instrument housing, backpouch for sensor
Standard Package Sensor, sensor poles, instrument, harness, download cable, operator’s manual and CD with PC software in a foam-lined rigid pelican case
Warranty One year from delivery date