IM7310A Rev A 6
April 7th, 2020
5.3. Adhesive Mount
Model 7310A angular rate sensor can be mounted by adhesives too. Adhesion of epoxies to the hard anodized case is
excellent, but thermal mismatch to the mounting surface can degrade the joint and cause undulating surface. A
compliant adhesive, such as Dow Corning 3145 RTV, is recommended. Use care to maintain flatness of the unit
during curing to reduce angular rate measurement errors. To remove adhesive-mount sensor from the mounting
surface, apply acetone or other dissolving agent to the adhesive layer using a cotton tip, wait for epoxy to be partly
dissolved before gently removing the sensor by hand or tools. Do not apply excessive strain on the sensor body
during removal of the sensor, especially when the sensor is mounted on the top surface.
5.4. Cable
As practical, tie down the cable within 2 to 3 inches (4 to 6 cm) of the unit. Whipping of the cable during rotation,
vibration and shock will strain the cable unnecessarily at the unit. The cable jacket is silicone, so care should be taken
to avoid cutting or tearing the jacket. The cable is rated for 257°F (125°C) continuous service.
5.5. Electrical Connection
Connect the unit to the signal conditioner using the following lead designation:
Red - Excitation +
Green - Output +
White - Output -
Black - Ground (Excitation -)
Endevco Model 136 3-channel signal conditioner is an optional accessory and is recommended to be used with
Model 7310A.
5.6. Triaxial Mount
For triaxial angular rate measurements, the Model 7930 Triax & Six Degrees of Freedom Mounting Block is attached
to the mounting surface with two 2-56 x 5/8 inch socket head cap screws as shown in Figure 2, with subsequent
attachment of the 3pc Model 7310A angular rate sensors per steps 5.2 through 5.5 above. To achieve optimum
mechanical coupling and accurate measurement of angular velocity, the three 7310A units should be mounted to the
three primary mounting surfaces marked of the 7930 block, corresponding to the three perpendicular axes of
rotation (Yaw, Pitch and Roll, top left of Figure 2). Same as the single unit installation in step 5.2, in triaxial
installation the 3pc 7310A units can be mounted on either the top or the bottom surface of the sensor depending on
the positive direction of rotation in the specific application. The Allen wrench (EHM178, alloy steel, black oxide finish)
and the 2pc 2-56 socket cap screws (EH572, 2-25 x 5/8’’, CRES) are supplied as mounting accessories in the shipping
container of the 7930 mounting block.
