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Replies
The SRX has a field collimation process that can correct this issue. Setup prism about 300ft away and go to the configuration/collimation IMAGE-SENSOR is normally the last in the list. Sight prism center and press measure and it will do an electronic adjustment for the offset. This is a document for the SX/PS series and is very similar. http://nebula.wsimg.com/18b0241bd61539dc3b4da3ab189427bf?AccessKeyI...
Good explanation, it is not an error, it is the way the station works, moreover you can check the accuracy of your targets looking the residuals of your resections, and the results of your backsights
Nimal,
what Ivan and Troy wrote above is absolutely correct.
Due the image processing, your SRX achieves better accuracy in angular measurements.
This is an AP1 image from SRX camera during a service inspection in my lab:
Sorry for image quality, but I took this picture with a poor camera ...
I suggest You, use a circular prism (like AP1, for instance), because the autopointing system can work better on a circular shape.
Obviously, your gun must be fine adjusted. With "Settings" menù, You can perform CCD calibration. It isn't too difficult but, if You are not enough skilled, it's better ask for Sokkia's service.
Greetings!
Carlo Alberto
Hi, I copied this comment from my Sokkia SRX manual, hope it helps
Search operation during Auto Pointing
2.
When the target enters the field-of-view within the set time limit for Auto Pointing completion,
the SRX stops moving and the offset between the target and telescope reticle is added to the
angle measurement value obtained from the encoder and compensated using image processing
calculation. Although this compensation reduces measurement time and increases search
accuracy, there is a possibility that the target and telescope reticle appear to be misaligned.
Compensated values are displayed in blue.
If the SRX is rotated (manually or u~ing the jog dials) more than 1 0", compensation will be
canceled, the angle reverts to that obtained from the encoder, and the angle values are once
again displayed in black. Compensation is automatically performed when performing Auto
Tracking. Terminating Auto Tracking or powering OFF the SRX will cancel the compensation
function .
Have you calibrated your station recently?