Quick Check® SV Series User’s Guide
5 - 5
2. Send “~SC” into the SV unit serial port. This will cause the Calibration LED
to flash.
3. If calibration is successful, the laser beam will go off and the Calibration LED
will go off. Remove the calibration symbol from the beam path and then
Press the RESET button until the beam turns on. The SV unit is now ready
to operate.
4. If calibration is unsuccessful, the Calibration LED will be either on steadily or
flashing. In this case, repeat the calibration procedure.
Once calibration is successful, re-calibration is not required unless the unit has
been moved – either on its mounting stand or into a new location. It is advised
to keep the laser beam exit window clean. Dirt, dust, and fingerprints on the exit
window can affect calibration.
Adjusting Scanner Gain and Offset
Scanner gain and offset adjustment via commands is available in SV units that
have the “A” circled on the label that indicates focus distance. The adjustment
capability is useful for adapting the unit to various material types and scanning
angles during the setup procedure. Knowledge of Hand Held Products’
ScanView software is required for best understanding of the following
description.
When setting SV scanner gain and offset, use ScanView Reflectance Profile
Mode as the guide to viewing signal levels. The object is to have at least 6 lines
high of signal amplitude for the bar code(s) being verified. The bar code signal
vertical placement (offset) should be within the yellow lines to ensure the signal
is in the linear range. All other objects’ amplitudes and placements are not
important. A picture of a “good” signal level is shown on
page 5-6
.
To adjust gain and offset settings, first use the ScanView Transmit SV
Commands Screen to send a ~HT command to the SV unit. In the reply, look for
the line that reads [DACs] = nnn nnn nnn nnn where nnn = numeric values.
Example: a unit may read: [DACs] = 201 146 255 255. This indicates the current
settings.
1. The 201 indicates the value of the gain setting. The higher the value, the
higher the gain and therefore the higher the amplitude of the scan profile for
a symbol. Max value is about 225.
2. The 146 value indicates the offset setting. The higher the value, the lower
the symbol placement is offset on the graph.
3. The command ~Hd101nnn sets gain where nnn is the three digit value.
4. The command ~Hd201nnn sets offset where nnn is the three digit value.
5. Use these commands to set the desired signal amplitude ( ~Hd101nnn) and
locate the signal vertical placement between the yellow lines ( ~Hd201nnn.)
Summary of Contents for SV series
Page 1: ... User s Guide Quick Check SV Series Bar Code Scanner Verifier ...
Page 8: ...iv ...
Page 16: ...2 6 Quick Check SV Series User s Guide ...
Page 22: ...3 6 Quick Check SV Series User s Guide ...
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