The LR-1B Calibration Stand is Simple and Easy to Use:

Simple leveling technology assures a level base for accurate and level rotation.


With the aid of our loading cart, the heavy Long Rangers are fairly easy to maneuver into position. This allows for a more controlled and safer loading process of the calibration stand. The simple wedge design aids in alignment and positioning of the instrument to the optimum 12 degree tilt required by the TRDI calibration software.

Once the Long Ranger is in the LR-1B calibration stand, our easy rotating turntable allows for a smooth and balanced 360 degree rotation. The pivoting ball attached between the four transducer heads simplifies the changing of the Long Ranger’s axis after each 360 degree rotation.

In the end, the LR1 minimizes the physical handling of the Long Ranger and saves time in the calibration process.

Demo LR-1B

Simple and Smooth Rotation Technology

Our calibration stands are designed to improve hard and soft iron calibrations, plus make it easier to perform the calibration procedure for a variety of Acoustic Current Profilers. LR-1B

Loading and Calibration Instructions

Teledyne RD Instruments Long Ranger Workhorse:


STEP 1. Place the Calibration Stand on level ground away from any metal, electric,
or other magnetic influences.

STEP 2. Use the three leveling adjusters on the calibration stand’s base to establish a level and steady platform before loading the instrument.

STEP 3. Use the Locking Pin to lock the turntable in place before trying to load the instrument (this insures the proper alignment and stability of the stand in preparation for loading).

STEP 4. Place the Long Ranger onto the cart’s frame with the transducers facing towards the calibration stand.

STEP 5. Attach the pivoting ball in the center between the four transducers. Using the bungee cords, rap them around the four transducers to hold the ball in place.

STEP 6. Carefully roll the cart toward the stand until two of the transducers are resting on the front edge of the plastic jig of the LR-1B.

STEP 7. Begin lifting the Long Ranger base so that two of the transducers pivot onto the jig and comes to rest on the pivoting ball. At this point you are able to easily rotate the Long Ranger. As you rotate the instrument, choose one of the transducers to lower into the recessed cutout. Adjust as needed so that the Long Ranger is seated firmly in place and is stable.

STEP 8. Attach the communication cable to the base of the Long Ranger.



STEP 9. Remove the Locking Pin to free up the turntable so it can rotate.

STEP 10. Slowly rotate the turntable according to the calibration software.

STEP 11. After the 1st 360 degree rotation, reposition the Long Ranger by tilting the instrument to the vertical position onto the pivoting ball. Turn the Long Ranger so that it can be lower back down onto a new transducer.

STEP 12. Repeat step 10 for the 2nd rotation according to the calibration software.

STEP 13. For the 3rd and final rotation, reposition the Long Ranger as in step 11

STEP 14. Repeat step 10 for the 3rd rotation according to the calibration software.

Calibration is now complete.



STEP 15. Use the Locking Pin to lock the turntable before trying to unload the instrument from the calibration stand.

STEP 16. Place the cart in the proper position and alignment with the saddle end of the cart tight against the base plate.

STEP 17. Tilt the Long Ranger to the vertical position and rotate the instrument so that two of the transducers will take the weight equally on the plastic jig of the LR-1B as you lower the housing down and back onto the cart.