Pacific Research Solutions PET-820 - Manual (Page 6)

Pacific Research PET-820 User Manual
Page 5
INTRODUCTION
The PET-820 (Personal Electronic Technician) represents the latest technological advances in the remote monitoring
industry. The PET-820 utilizes a microprocessor design combining all control and communication electronics on a single
printed circuit board. This type of design enables the PET-820 to deliver superior and competitive performance. All program
options are stored in a NON-VOLATILE EEPROM (Electrically Erasable Programmable Read Only Memory), which
maintains its data even with the power disconnected. This EEPROM may be re-programmed by the user in order to change
the system characteristics with no additional equipment required for programming. The PET's microprocessor and power
supply is constantly monitored by a "WATCHDOG TIMER" which maintains the operational integrity of the system. The
PET-820 is easy to set up and use. We recommend that you read sections 1 and 2 of this manual first, to get familiar with the
system and its basic operation. The other sections of this manual provide a thorough explanation of the PET-820's many
Features.
Available to the PET-820, are many other optional features. The operation of these features have been included in this
manual and may not pertain to your application. Some of these options and their features are listed below;
1. RAM/RTC (Random Access Memory / Real Time Clock) This option is used to enhance the features and
performance of the PET-820. These features include date and time stamp of alarms, increased programmable speech
buffers and a larger telephone number list. This option is also required with the Analog Input option.
2. BATTERY The battery option will provide operating power for the PET-820 for up to 8 hours without external
power.
3. KEYPAD/DISPLAY This option gives the user the freedom to operate the PET-820 at the unit without a telephone
line connected.
4. ANALOG INPUT With this option the PET-820 can be used to monitor analog voltages for alarm conditions. The
eight channel analog input option uses a plus and minus twelve bit integrating type converter. Although this type of
converter is somewhat slow, approx. 30 conversions per second, it has excellent accuracy and noise immunity.
There are various items that are programmable for this option. These items will allow you to customize the analog
option to meet your needs. We recommend that you review all pertinent sections of this manual to get familiar with
the analog option and its basic operation.