The 3DM-DH®3 is a downhole orientation sensor and datalogger. It incorporates acceleration sensors, magnetic field sensors, and temperature sensors, together with an on-board microprocessor, embedded software algorithm, non-volatile memory for configuration, flash datalogging memory, and serial communication interface. Its form-factor, rated temperature range and power supply requirements are optimized for downhole applications. The 3DM-DH3 provides accurate drill path measurements including Inclination, Azimuth, GTF, MTF, Dip Angle, sensor temperatures, G-TOT and H-TOT.
Datasheet ManualLarge Quantity & OEM Orders
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List Price: $2,495.00
Best in Class
- Precise downhole orientation
- High-speed sample rate & flexible data outputs
- Extended use, low-power data logging
Easiest to Use
- Rapid deployment in the drill string
- Outputs drill path measurements
Cost Effective
- Reduced cost and rapid time to market for customer’s applications
- Aggressive volume discount schedule
Orientation range |
360˚ all axes (orientation angles); inclination, azimuth, GTF, MTF, Dip Angle, G-TOT, H-TOT |
A/D resolution |
24 bits accelerometer; 16 bits magnetometer |
Angle resolution |
0.02˚ |
Accuracy |
± 0.2˚ inclination ± 0.5˚ azimuth |
Angle measurement repeatability |
0.1 ° |
Digital output rate/logging rate |
up to 8 Hz |
Output modes |
acceleration and magnetic field vectors plus temperature; orientation angles plus temperature |
Digital output |
RS-422 serial (four-wire full-duplex) standard |
Serial data rate |
115200 baud |
Datalogging capacity |
up to 32,768 data records |
Supply voltage |
+6.0 VDC min, +10.0 VDC max |
Supply current |
50 mA typical when connected to host 16 mA typical when logging at 8Hz 500 μA typical when logging at 1/4 Hz 50 μA typical in deep sleep mode |
Connectors |
through hole PCB pads (solder-in) 2 mm pitch, 2 row 16 pin header |
Operating Temperature |
- 40 ˚C to 125 ˚C (-10 ˚C to 125 ˚C with recommended batteries) |
Dimensions |
177 mm x 21 mm diameter |
Weight |
91 grams |
Shock limit |
500 g |
Enclosure material |
anodized aluminum |
Software |
Windows XP, Vista, 7 |
General Documentation
- 3DM-DH®3 Product Datasheet
- 3DM-DH®3 Operations Manual
- 3DM-DH®3 Quick Start Guide
- Inertial product comparison
- 8200-0010 (SOFTWARE, 3DM-DH)
- Inertial product comparison
Mechanical Drawings (Uncontrolled)
Software
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The 3DM-DH3 is operated by a combination RS-422 communication and power cable, part number 4005-0003.
The term ‘static’ accuracy refers to measurements made when the inertial unit is not moving and the on-board orientation algorithm has recovered from any sensor over-ranging.
The term ‘dynamic’ accuracy refers to measurements made while the inertial unit is moving and not exceeding the measurement range of the individual on-board sensors (accelerometers, gyroscopes, magnetometers).
The 3DM, 3DM-DH and FAS-A are designed to measure static rotations.
The 3DM-GX3 family is designed to measure both static and dynamic rotations.
Yes. The unit is factory calibrated and ready for use with power-up.
Physically, the 3DM-DH3 is easily mounted into the drill string using its body’s threading attachments. It can be tethered to an RS-422 communication cable for continuous real-time measurements to a host computer during drilling operations, or it can be remotely deployed and run as a datalogger, with data retrieval after it has been run through the drill path. The unit can be powered through the communication cable tether from a platform source or by batteries.
The 3DM-DH3 has measurment accuracy of +/-0.2 degrees inclination and +/-0.5 degrees azimuth.
The 3DM-DH3 has a four-wire full-duplex RS-422 serial communication interface.
Yes. A Windows XP/Vista/7 compatible software is shipped the product. The software allows the user to configure, operate, display and save data from the sensor.
The 3DM-DH3 will operate within a temperature range of - 40 degrees C to 125 degrees C.
The 3DM-DH3 provides accurate drill path measurements including Inclination, Azimuth, GTF, MTF, Dip Angle, sensor temperatures, G-TOT and H-TOT.
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