Delta PG-35 Specifications download pdf (Page 41)

DELTA LTL-XL Retroreflectometer 41

Calibration

The LTL-XL is factory calibrated and very stable but a calibration should always be carried

out before starting a new series of measurements. The instrument is supplied with a calibra-

tion unit to carry out a fast and easy calibration.

Back Front

Calibration procedure

 Before mounting the calibration unit check the R

and Qd values stamped on the cal-

ibration unit. Place the instrument upon the calibration unit and pull back until the

pins at the back and front of the LTL-XL are in place, see figure 7. Please be very

careful when you place the instrument on the calibration plate not to damage the

calibration unit and / or the light diodes

Press the CALIBRATION button once. Select CALIBRATE R

or CALIBRATE QD.

Continue the calibration process applying the following steps

 Check the value displayed and, if necessary, adjust the calibration value shown in the

display so it matches the value stamped on the calibration unit.

Figure 7: Placing the calibration unit

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Delta PG-35 Specifications Page 41