Testing Aimer Calibration

Testing Aimer Calibration:

The aimer calibration may be off due to extended use. Calibration fixtures used in conjunction with aimers can be used to check and adjust aimers.

1. Turn thumb adjusting screw on each calibration fixture until it is approximately the same distance as the supporting posts.

2. Attach calibration fixtures to each unit with level vials on top.

3. Locate a true vertical plate glass window or smooth surface and secure aimers three to five feet apart so split image targets can be located in viewing ports.

4. Set floor level dial at zero.

5. Rotate thumb adjusting screws on each calibration fixture until level vials on fixtures are centered.

6. With both calibration level vials centered, turn vertical dial knobs on each aimer until aimer level vials are centered. If aimer vertical dial pointers read between 1/2 up and 1/2 down, aimers are within allowable vertical tolerance. Recalibrate units if beyond these limits.
Vertical dial pointer reading (on each aimer): 1/2 up to 1/2 down

7. Adjust horizontal dial knob on each aimer until split image targets align. If aimer horizontal dial pointers read between 1 left and 1 right, the aimers are within allowable tolerance limits. Recalibrate units if beyond these limits.
Horizontal dial pointer reading (on each aimer): 1 left to 1 right