Datalogic PowerScan PD9500 PD9530-HPK1 数据表

Symbologies

Product Reference Guide

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Decoding Safety is used to configure a decoder to be very aggressive to very 

conservative, depending on a particular customer’s needs.

• Level 1 results in a very aggressive decoder. 

• Level 5 results in a very conservative decoder at the expense of not 

being able to read poorly printed or damaged labels.

There are many factors that determine when to change the decoding safety. 

These factors include spots, voids, non-uniform backgrounds, damaged 

labels, etc. that may be experienced in some barcode labels. If there are 

many hard to read or damaged labels that cannot be decoded using a con-

servative setting, decrease the decoding safety to be more aggressive. In 

case of rigorous reliability application requirements it is suggested to use 

higher decoding safety values (conservative).

Length Control allows you to select either variable length decoding or fixed 

length decoding for the specified symbology.

For variable length decoding, a minimum and maximum 

length may be set.

For fixed length decoding, two different lengths may be set.

This feature specifies one of the bar code lengths for Length Control. Length 

1 is the minimum label length if in Variable Length Mode, or the first fixed 

length if in Fixed Length Mode. Length includes the bar code’s data charac-

ters only. 
The number of characters that can be set varies, depending on the symbol-

ogy. Reference the page for your selected symbology to see specific vari-

ables.

1. Determine the desired character length (varies depending on symbol-

ogy). Pad the number with leading zeroes to yield two digits. For exam-

ple: 0 = 00, 5 = 05, 20 = 20, etc.

2. Go to the Set Length page for your selected symbology and scan the 

ENTER/EXIT PROGRAMMING MODE bar code to enter Programming 

Mode.

3. Scan the bar code to SELECT LENGTH 1 SETTING for your selected sym-

bology.

4. Scan the appropriate two digits from the keypad in 

, that represent the length setting which was determined in the 

steps above. You will hear a two-beep indication after the last charac-

ter.