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DELTA LTL2000S(Q) Retroreflectometer 22
the display one at a time using the keys.
An * after a text means that the message only is shown at special occasions e.g. an er-
ror or warning!
LTL2000S(Q) Display
Explanation (The following messages are possible)
R: 146 Q: 64
The latest measurement results.
Rl Signal: 143
Rl Out of Limit*
Rl Sig Overflow*
Rl Stray L: 0
Rl High Stray L*
VBat Rl: 11.2V
Low VBat Warning*
The measured Rl “raw signal” level.
The Rl value is negative.
Warning: unreliable measurement!
If the measured signal is greater than a predefined
limit then a warning will be displayed for one second
before the Rl Sig value is shown.
Error sources: Rl marking exceeds the dynamic range
of the instrument, failure in the optical system e.g.
dew or dirt on the front window or it can be an elec-
trical failure.
The measured stray light representing the amount of
light getting into the instrument from outside. Stray
light levels under acceptable predefined limits is dis-
played as 0.
Warning. A high stray light signal can indicate prob-
lems with direct sunlight from a low sun on a very
rough or uneven surface. Special precautions must, if
necessary, be taken to hinder the light from shining
directly on the measurement area. A warning will be
displayed for one second, if the signal gets critical,
before the Rl Stray L value.
The battery Rl voltage measured while the lamp is on.
The reading can be used to check the charge condition
of the built-in 12 V battery.
A warning will be displayed for one second before the
VBat Rl voltage is shown, if the voltage under load
drops to a critical low value. If the battery voltage
gets very low, the instrument will shut off during the
measurement because the battery voltage drops fur-
ther when the lamp is lit. This condition will be re-
ported in the display on the next power on. Measuring
will not be possible until the battery is recharged.
Qd Signal: 875
The measured Qd signal level.