HP 33s hp 33s_user's manual_English_E_HDPM20PIE56.pdf - Page 296
Environmental Limits, Changing the Batteries - battery change
UPC - 082916001456
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A: You must clear a portion of memory before proceeding. (See appendix B.) Q: Why does calculating the sine (or tangent) of π radians display a very small number instead of 0? A: π cannot be represented exactly with the 12-digit precision of the calculator. Q: Why do I get incorrect answers when I use the trigonometric functions? A: You must make sure the calculator is using the correct angular mode ( or {} ). Q: What does an annunciator in the display mean? A: It indicates something about the status of the calculator. See "Annunciators" in chapter 1. Q: Numbers show up as fractions. How do I get decimal numbers? A: Press { . Environmental Limits To maintain product reliability, observe the following temperature and humidity 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. Changing the Batteries The calculator is powered by two 3-volt lithium coin batteries, CR2032. Replace the batteries as soon as possible when the low battery annunciator ( ¥) appears. If the battery annunciator is on, and the display dims, you may lose data. If data is lost, the message is displayed. A-2 Support, Batteries, and Service