HP 17bII User's Manual | Page 230

HP Calculators User's Manual - 17bII.
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230  A: Assistance, Batteries, Memory, and Service 

File name : English-M02-1-040308(Print).doc   Print data : 2004/3/9

Clock Accuracy 

The clock is regulated by a quartz crystal accurate to within 1.5 minutes 
per month under normal conditions. The accuracy of the clock crystal is 
affected by temperature, physical shock, humidity, and aging. Optimum 
accuracy is maintained at 25°C (77°F). 
 

Environmental Limits 

In order to maintain product reliability, observe the following limits: 
 
„  Operating temperature: 0° to 45°C (32° to 113°F). 
„ Storage temperature: 

-20° to 65°C (-4° to 149°F). 

„ Operating and storage humidity: 90% relative humidity at 40°C 

(104°F) maximum. 

 

Determining If the Calculator Requires  
Service 

Use these guidelines to determine if the calculator requires service. If it 
does, read “Service” on page 235. 
 
„  If the calculator won’t turn on: 

1.  Attempt to reset the calculator (see page 228). 
2.  If the calculator fails to respond after step 1, replace the batteries 

(see page 225). 

If you have just replaced the batteries, see page 

227. 

  If these steps do not help, the calculator requires service. 
 
„  If the calculator doesn’t respond to keystrokes: 

1.  Attempt to reset the calculator (see page 228). 
2.  If the calculator still fails to respond, attempt to erase Continuous 

Memory (see page 229). This will erase all the information you’ve 
stored. 

  If these steps do not help, the calculator requires service. 

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