NDC BETA LaserMike LaserSpeed Pro 8500-4, Инструкция по эксплуатации, Страница: 46 / 348

3-26 LaserSpeed Pro 8500-4 Instruction Handbook: Installing the System
3.5 Maximizing Performance
The system is now at the point where it can be powered on and the laser activated so beams are emitted from
the front of the gauge. Be sure that the laser interlock and shutter control circuits are functioning properly.

When Pin 16 is connected to GND (Pin 11, 19, or 21), the laser becomes operational.

When Pin 17 is connected to GND (Pin 11, 19, or 21), the shutter will open.

Check the key switch to verify the laser power can be controlled.
Warning : Avoid exposure to the beam. Never look directly into the laser beams, even when wearing
protective eyewear. Eye damage could result.
Note : There may be some delay time between when the system is powered on, and when the laser
comes on. There is a 7 second delay after power is applied to the laser (key switch on, laser
interlock closed) before the laser turns on. The laser will also not turn on until the laser tem-
perature controller stabilizes. This may take a few minutes after power is initially applied.
The configuration and setup of the gauge can be verified and/or changed using the supplied LaserTrak Soft-
ware or directly using the serial commands listed in the
Communication Protocol section. Utilizing either one
of these approaches requires a computer with an RS-232 serial port connected to pins 1 and 2 of the 25-pin
D-sub connector.
3.5.1 Quality Factor
Once proper communication is established (see the See the LaserTrak Software section for help), it is rec-
ommended to check the Quality Factor (QF). QF can be checked using LaserTrak, and viewing the chart re-
corder screen. Quality Factor is an indication of how well the gauge is making measurements. If the QF is 0,
then the gauge is not able to measure at all, and if the QF is 15, the gauge is able to measure very well. On
most products, the QF should be 15 most of the time with occasional drops to lower values. If the QF is re-
peatedly dropping to zero, there may be a problem with guiding or with the standoff distance.
If the QF is below 15, try to move the product or the gauge slightly (adjust the standoff) and look for improve-
ments in QF. Once QF is maximized, change the line speed and look for a corresponding velocity change on
the chart recorder.
Alternatively, the analog port can be configured to output QF on a 0
–1 V scale. The QF can then be moni-
tored by connecting a panel meter to the analog output and displaying the voltage. A third method of monitor-
ing the Quality Factor is to reassign one of the pulse outputs to output the Quality Factor as a frequency out-
put.
To ensure quality measurements, the laser beams must maintain “contact” with the product. If the product
exhibits large movements during operation, it should be stabilized with external roller guides. NDC Technolo-
gies offers optional product guides. Contact your local NDC Technologies sales representative or the factory
for additional information.