HP 17bII Clock Accuracy, Environmental Limits, Determining If the Calculator Requires Service

!Maintains the selected mode－ALG or RPN.

Erasing Continuous Memory does not affect the current time and date, date and the selected language.

To erase Continuous Memory, press and hold down C, the leftmost menu key, and the rightmost menu key. (Press three keys simultaneously). When the three keys are released, the calculator displays 0H0E2@ 9EF:.

Continuous Memory can inadvertently be erased if the calculator is dropped or if power is interrupted.

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.

A: Assistance, Batteries, Memory, and Service 231

File name : 17BII-Plus-Manual-E-PRINT-030709 Print data : 2003/7/11