pocket reference guide
Note:Pleaseusecautionwhendisposingof
youroldbatteries,astheycontainhazardous
chemicals.
Replacement batteries are available at most 
discount or electronics stores. You may also 
call Calculated Industries at 1-775-885-4900.
Battery Replacement Instructions
To replace the batteries, slide open the 
battery door (at top backside of unit) and 
replace with new batteries. Make sure the 
batteries are facing positive side up.
Reset
If your calculator should ever “lock up”, insert 
the tip of a paperclip into the small Reset 
hole located above the A key – to perform 
a total reset.
Pocket RefeRence Guide — 39
(cont'd)
GivensideBandanglea,find:
   Side A  B  a   
   Side C  B  a   
GivensideCandanglea,find:
   Side A  C  a   
   Side B  C  a   
GivensideAandsideC,find:
 Angle a  A  C      
 Angle b  A  C     
GivensideBandangleb,find:
   Side C  B  b   
   Side A  B  b   
 aPPendix
Auto Shut-Off
Your calculator is designed to shut itself off 
after about 8-12 minutes of non-use.
Batteries
The Pipe Trades Pro uses two LR-44 
batteries.
Replacing Batteries
Should your calculator display become very 
dim or erratic, replace the batteries.










