Ranger HRC™ operator´s manual – System operation
Publ. No. TM 614 006 699 Rev B – ENGLISH (EN) – Oct 30. 2008 151
11.5 Distance measurements
The LRF (Laser Range Finder) unit is used to measure the distance to a
target. The LRF unit determines the distance by measuring the time it
takes for a laser pulse to go the target and back again.
The LRF unit is charged after every laser pulse shot. The status text
“Laser charging N)” N = a number between 1 and 6) is displayed during
the charging. When the unit is ready for next shot, “Laser ready N)” is
displayed.
Generally, an interval of 6 seconds is recommended between the shots, to
ensure an adequate operating temperature of the LRF unit. The operator
may exceed this recommendation momentarily, but if the rate is too high
the system will block the LRF unit for a short recovery time.
The status text “Laser charging 6)” is displayed when the LRF unit is acti-
vated. The number (N) is decremented after each shot and incremented
when about 6 seconds has elapsed since the last shot. If a shot is red when
“Laser ready 1)” is displayed, the LRF unit will temporarily be blocked
for recovery. “Laser not ready N)” will be displayed, where the number
(N) is a count down in seconds until a new shot is possible. Normally this
time is 35 seconds, but in extremely hot environments the count down
starts at 70.
When the system is used with a remote computer, the results from the
LRF unit can be reported to the remote computer. Depending on the set-
ting of the Auto Forward Targets feature, see section 7.8, the operator
may have to approve the results that shall be reported.
NOTE: Before using the LRF unit, please read the safety instructions in chapter 2.
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