Delta LTL2000S Specifications download pdf (Page 35)

DELTA LTL2000 Retrometer 29

Fuses

Fuses, two pieces, are placed at the rear of the instrument. The charging fuse protects the battery against

short circuit and other errors in the charging connector, charger or charging system.

The battery fuse protects battery and electronics against short circuit and other errors in the electronic

system.

Always renew a blown fuse with one of equal rating. To change a fuse carefully unscrew the plastic cap

fuse holder by using eg a coin. Pull out the fuse from the cap and insert the new one and reassemble

Lamp

The halogen lamp requires no maintenance. At life end it must be renewed.

It is recommended that renewing is done by trained personal.

Calibration unit

The road marking is simulated by a piece of white ceramics mounted on a aluminium block with a small

grip. Ceramics has very stable optical properties and cleaning is easy because of the smooth surface.

To make sure that calibration of the Retrometer is correct it is important that the ceramics on the

calibration unit is clean and undamaged. All ways keep the calibration unit well protected.

If the ceramics is stained, scratched or broken the calibration unit has to be renewed.

In case of dust on the ceramics surface, clean gently with a damp soft cloth if necessary use a mild

household detergent.

To ensure reliable measurements, it is recommended that the calibration unit is periodically recalibrated

to a traceable standard. DELTA Light & Optics offers calibration traceable to PTB (Physikalsich-

Technishe Bundesanstalt). For information contact your distributor or DELTA Light & Optics.

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Delta LTL2000S Specifications Page 35