Trimble S - Distance unit

Chapter 4
Troubleshooting
P/N 57150002, Revision 4.0 4 - 21 Trimble S6, S8, VX, SPS & RTS Service Manual
F
Distance unit
DR300+ / DR PLUS
High Precision / DR Standard / DR
Symptom Resolution
Measuring out of tolerance Check optical adjustment, see page 6-60.
Check APD / reference fibre adjustment, see page 6-72.
Run offset determination, see page 6-82.
Symptom Resolution
Distance problems 1. Check optical adjustments of transmitter and receiver fibre,
see page 6-66 and reference fibre signal, see page 6-115.
2. Make distance measurement deviation with Scattered light
device mounted, see page 6-115. Start a distance
measurement, DR mode. Deviation < 1,0 mm OK Deviation
> 1,0 mm, check reference fibre adjustment, see page 6-109
& signal/noise ratio, see page 6-115.
3. Check reference fibre adjustment, see page 6-115. Check
values 0,450-0,650. (Current one 0,500-0,580)
4. Check signal/noise ratio, see page 6-115. If >10 check: -
Check switch motor function, see page 6-113. Replace
switch motor if broken / damaged - Check receiver fibre.
Replace receiver fibre if broken / damaged - Replace
Transceiver board (APD, too much noise)
5. Check crosstalk, see page 6-115. If > 3: - Clean front leans
and Light trap tool. - Check for dust / dirt inside EDM, clean
with dust remover (air) - Check transmitter beam position on
transmitter prism using Screen attachment tool, see page 6-
66.