Label Formatting Command Functions 
 
 
 
 
Class Series 2 Programmer’s Manual  131 
 
H  Enter Heat Setting 
 
This command changes the “on time” of elements of the print head. The default setting 
is 10 (except in the case of printers with a menu, where the default setting can be 
changed through the keypad). An increase or decrease in this value results in a change 
of heat applied by the print head to the media, lightening or darkening the print contrast 
accordingly. This is helpful when using different media types, each requiring a different 
amount of heat to properly image the media. The host device can send this command 
value to correct the heat setting per the application. 
 
Syntax: 
Hnn 
 
Where: 
nn 
-
Is a two-digit heat value (00-30). 
 
Sample: 
<STX>L<CR> 
H15<CR> 
141100001000100SAMPLE LABEL<CR> 
E 
 
The sample above sets the printer for a heat value of 15 and 
prints one label. 
 
 
Non-Display models – the “Darkness Potentiometer,” while providing subtle changes, is 
intended to be used to match print contrast levels following print head replacements.  
 
 
J Justification  
 
This command changes the printing justification. 
 
Syntax: 
Ja 
 
Where: 
a 
-
Is a single-digit alpha character: 
L = left justified (default) 
R = right justified  
C = center justified 
 
Sample: 
<STX>L<CR>   
1911A1801001000TEST1 
JR 
1911A1801000100TEST2 
JC 
1911A1802000200TEST3 
E 
 
The sample above prints “TEST1” one inch up and one inch over 
going right, “TEST2” one inch up and one inch over going left, and 
“TEST3” two inches up and over. 
 
 
Display-Equipped Models – This command is only valid for use with scalable fonts.