Install the HG1700 Sensor Unit
To install the HG1700 sensor unit in the Universal Enclosure:
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Using a Phillips screwdriver, remove the 8-32 IMU mounting screws from the IMU mounting plate, as shown in Figure: Remove IMU Mounting Screws.
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Check the connection of the internal cable harness to the board assembly and route as shown in Figure: Connect IMU to IMU Mounting Plate. Before you connect the IMU cable harness, make sure the connector on the board assembly is clicked open. Connect the IMU cable harness to the IMU (fasten the 2-56 screws but do not use thread-locking fluid), then connect to the board assembly. Ensure the cable housing latches.
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Being careful of the connectors and the orientation, align the pilot holes of the IMU with the pilot pins of the mounting plate. Gently place the IMU and mounting plate together, being careful not to pinch the cable harness. Screw the IMU and mounting plate together, using thread-locking fluid on the 8-32 screws, as shown in Figure: Installing IMU to Mounting Plate.
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Starting with the round pilot hole, shown in Figure: Assemble Into Enclosure Body, align the pilot holes of the assembled plate (noting the orientation) with the pilot pins of the enclosure body. Lower the assembly into place, then fasten using thread-locking fluid on the M4 screws.
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Connect the internal cable harness to the enclosure body, as shown in Figure: Fasten Internal Cable Harness. During this step, ensure the connector O-ring (supplied with the connector of the internal cable harness) remains flat within the connector’s groove, and make sure the groove is clean and free of debris. Fasten the connector to the enclosure body wall using the jam nut supplied with the connector. Apply thread-locking fluid then, with a 30 mm socket, tighten the jam nut to 6.9 N-m (61 lb-in/5.1 lb-ft).
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Ensure the O-rings are in place. If they are not, as necessary, make sure the grooves of the enclosure base are clean and free of debris, using isopropyl alcohol. As shown in Figure: Install O-rings, install the outer environmental and inner EMI O-rings in the enclosure base, being careful not to stretch or twist them. O-rings must remain flat within the grooves during the remainder of the assembly procedure.
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Clean the surface of the enclosure body, where it mates with the O-rings, using isopropyl alcohol. As shown in Figure: Install Enclosure Body on the Base, align the reference markers and pilot holes/pins of the enclosure body and base. Carefully lower the body onto the base, observing the O-rings and alignment of corners. Press the enclosure body into place, starting with the round pilot hole indicated in Figure: Install Enclosure Body on the Base.
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While squeezing and holding the enclosure body and base together to maintain tight contact, carefully turn the assembly over and place it on its top, as shown in Figure: Screw Enclosure Base to Body. Using a 3 mm hex bit, lightly fasten four equally spaced M4 screws to hold the parts together. Apply thread-locking fluid to each screw before inserting. Install the remaining screws in similar fashion. Tighten all screws then check all of them again for tightness. Tighten these screws to 1.36-1.58 N‑m (12-14 lb-in). Do not over-tighten.
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Ensure the product identification label, the logo plate and the center of navigation labels are properly affixed and contain the correct information. The final assembled unit will be similar to that shown in Figure: Final Assembly.
