User's Manual

5.6 Horizontal Collimation Error C

If the telescope’s sight line isn’t perpendicular to the horizontal axis, the collimation error

will appear. The assembling, transportation and operation will cause this error.

If the collimation error isn’t over the permitted range, with the program the instrument

can correct this collimation error.

NOTE: After the program correction this deviation error is also on the instrument.

1) Check

(1) Set-up the instrument on tripod or adjustment platform and leveling accurately.

(2) Aim at the cross-hairs of collimator or the obvious target at a distance. Get the face

left angle reading H1 and the face right angle reading Hr.

(3) Calculating the horizontal collimation error C according to C=˄Hl- Hr±180°˅/2,if

C<8Ǝ, no adjustment will be necessary. If C>8Ǝ, proceed with the following adjustment.

2) Adjustment by program:

Set-up the instrument on tripod or adjustment platform, and leveling accurately.

Procedures:

1. Power on, run the software “INST Setup”, on the screen tap Ż or Ź keys until

Collimation displays, tap it to display collimation error and vertical index error setting

menu.

2. Aim at the cross-hair of collimator at telescope left, tap “Left value” to read the

horizntal and vertical angles.

3. Aim at the cross-hair of coillmator at telescope right, tap “Right value” to read the

horzontal and vertical angles.

4. The software will calculate the new collimation error and vertical index error

automatically.

5. Tap “Enter” to save the new values, or tap “Cancel” to use old values.

Note:

The adjustment can be performed by the program when C<30Ǝ, if C>30Ǝ, adjust the