Page 28 To avoid drilling into electrical wiring behind the drywall, drill only through the installation guide. Page 29 Do not over tighten the lag screws. Over-tightening will damage the wooden stud and reduce the holding force. Page 30 Figure Page 31 Figure 16 Do not over tighten the lag screws.
Over tightening the lag screws will damage the wooden stud and reduce the holding force. Page 33 that has been installed to the support plate shown in.
The wall and support plates are shipped in separate cartons from the Preva. Put the small, then the larger washers and nut on each of the four carriage bolts. Page 35 1. Locate the Horizontal Arm in the top level of the shipping carton. Remove the Horizontal Arm from the shipping carton. Do not remove the cardboard tube around the wires but remove the red tag. Insert the cardboard tube snugly into the shaft of the Horizontal Arm.
Page 39 Figure 23 Figure Page 40 Figure 25 Figure Page 41 Figure Page 44 Figure Page 45 Calibration of the Preva Dental X-ray System is preset at the factory and is not required during initial installation. Service replacement of the Power Supply Control Board or the Tubehead may require calibration.
See the Calibration section of this manual. Page 47 Figure 34 Figure 34 Figure Page 48 Figure Page 49 Figure 36 Figure Page 51 Figure 8 Figure 36 Figure Page 53 Figure Page 54 Figure Page 58 Figure Page 61 Preva Preva Page 62 Figure Page 63 Figure 44 Figure Page 64 Figure Page 65 Figure Page 66 The exposure switch wires must be connected to the terminal block with no exposed strands of wire. Milliamperage [mA] is controlled by the microprocessor and is not adjustable. The Preva generates milliamperage by first establishing a reference voltage and then comparing the feedback voltage to the reference.
Follow these steps to establish proper operation of the mA controls. This guide provides instructions for the installation technician on how to remove the original head, install the replacement tubehead, and how to calibrate the replacement tubehead.
The replacement head will have the yoke cable assembly attached. NOTE: Do not remove the yoke cable from the tubehead. Figure 68 2. Remove the cone from the head being replaced. The cone sits in the tubehead. Unplug the black and white connector. Figure 72 6. Remove the two Allen head screws that secure the two ground wires to the yoke. Take note of the position of each ground wire.
Remove the larger Phillips head screw. Figure 76 Remove the larger retaining ring by pulling it out with a pair of needle nose pliers.
Figure 77 Unplug the black and white connectors located inside the tubehead. Secure the scissor arm with the provided cable tie and foam separator before removing both spanner rings. Do not remove the tubehead until this step has been completed. The spring tension is adjusted to include its weight so the articulating arm will spring open and can cause serious injury if it is not secured.
Break loose the spanner ring by turning the spanner wrench counter- clockwise. Carefully remove the tubehead from the yoke. Feed the connectors and ground wires of the pre-assembled yoke cable assembly through the opening of the yoke collar. Figure 85 Insert the tubehead into the yoke collar Figure 86 Feed the connectors and ground wire of the yoke cable through the first spanner nut.
Manually thread the spanner nut on the tubehead shaft. Insert a small screwdriver into one of the alignment holes to finish tightening the spanner ring. Figure 88 Feed the connectors and ground wire of the yoke cable through the spanner wrench. Feed the black connector through the yoke collar. NOTE: Take care not to damage the connector. Figure 91 Feed the white connector through the yoke collar.
Re-attach the two ground cables that were removed in Step 6. Figure 94 Connect the black and white connectors that were disconnected in Step Figure 95 To ensure correct operation and to prevent damage to the yoke cable assembly perform the following steps: Mount the yoke cover that was removed in Step 4 Figure 97 Verify that the wires are not binding when the tubehead is rotated completely clockwise or completely counter-clockwise.
The cabling should expand and contract cleanly and evenly without any binding. During the installation process, check Necessary the balance and friction. When moving the Tubehead, the Articulating Arm Adjustment should be steady in all positions and move before the Horizontal Arm.
Using a 3 mm Allen wrench, as shown in Figure Adjusting , tighten or loosen screws as necessary to get proper movement without unwanted horizontal movement of the Articulating Arm. Refer to Figure while following the procedures below. Articulating 1. Loosen the two set screws highlighted in Figure , but do not remove them completely. Remove the plastic trim covers from the end of the Articulating Arm nearest to Outside the Tubehead. Articulating 2. Position the Articulating Arm with the arm nearest the Tubehead fully upward.
Arm Vertical 3. These friction points can be adjusted to reduce or increase the Arm Friction force needed to position the Articulating Arm. These exposure settings can be modified using the System E Cat 5 25ft. E Cat 5 6 inch E Lift the shipping box and separate from the crate. There are two layers of parts. Separate the top layer and place on the floor or remove each piece individually. Observe proper lifting precautions while doing this. Remove the screws at the base of the control unit and lift off the cover.
IGURE 7. Separate the mobile unit base from the pallet. The base is heavy and requires two people to lift. Locate the mobile unit post located in the bottom layer of parts removed in step 3 and insert into the mobile base as shown.
Orient the post with the wires exiting toward the control unit as shown below. Attach the post to the mobile base and use the 10 mm hex key to secure it with the column screw PN M from the kit.
Carefully insert the articulated arm, taking care not to pinch or damage the connectors. Note that the articulated arm must be oriented away from the control unit see Figure Secure the articulated arm assembly to the post with the two column screws that were backed out in step 9.
Locate and install the articulating arm brake assembly. Install and adjust by tightening to the point where the articulating arm does not drift when the arm is pushed lightly. If the unit is a Preva 2. Insert cables into the post.
Install the cover plate. Remove the screw that locks down the Logic board. The proprietary dual-arm braking system helps the head stay exactly where you position it without sagging or drifting. Options: Exposure hand switch; 12" cone; 8" rectangular cone; Choice of 56", 66", 76" or 82" total reach ; Two-stud mounting plate; Metal stud-mounting plate. Cabinet pass-through alternate : 66" arm: Mobile: Base: For additional specifications, click here.
Share this Page.
0コメント