User guide

Page 8-4 Technical Reference
KEYBOARD
- Hermetically sealed membrane keypad with tactile response
- 21 raised keys: 0.5" (1.27 cm) square on 0.7" (1.78 cm) centers
- All alphanumeric characters available
POWER
- Powered by 6 “AA” rechargeable nickel-cadmium batteries in shrink-wrapped battery
pack.
- Battery life: fully charged batteries provide up to 40 hours of continuous operation
(depending on application); may be recharged up to 300 times
- Backup battery: Lithium battery maintains memory for up to 5 years
CLOCK
- Functions: month, day, hour, minute, second, and hundredth-second
- Clock accuracy: maximum 3 minutes deviation/month