Environmental Limits; Changing The Batteries - HP 33s User Manual

A: You must clear a portion of memory before proceeding. (See appendix B.)
Q: Why does calculating the sine (or tangent) of
number instead of 0 ?
A: 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 ?
¹ É
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
Operating and storage humidity: 90% relative humidity at 40
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
.
°
C (–4 to 149 °F).
radians display a very small
°
C (104
Ý
°
F)
ã
)