Appendix A – Monitor Specifications
Electrical
Power Required
8-16VDC
Power Consumption
<1mA standby
<20mA active
Mechanical
Enclosure NEMA-4
Fiberglass
Dimensions
Monitor-1 5”x5”x4”,
Monitor-4 12” x 14” x 8”
Display
2x20 character backlit LCD
Keypad 6
buttons
SD card slot with activity LED
For download data and read/write setups
Red Warning LED
Indicates setup or operational error
Green Heartbeat LED
Indicates unit is operating properly
Environmental
Temperature
-40
°
C to +60
°
C (LCD operates to -10
°
C)
Humidity 0-95%
Non-condensing
Clock
Internal real-time clock w/battery backup.
Standard accuracy: +2 minutes/month
Optional high accuracy: + 20 seconds/month
Optional GPS clock
Log capacity
>250,000 readings, flash memory
Data Communications
RS232 DB9 (female) connects to PC/PDA/modem/radio
+5 or +12V on pin 9 (71 mA at +5V)
Key Features
Clock
Internal real-time clock w/battery backup.
Standard accuracy: +2 minutes/month
Optional high accuracy: + seconds/month
Log capacity
>250,000 readings, flash memory
Data Communications
RS232 DB9 (female) connects to PC/PDA/modem/radio
+5 or +12V on pin 9 (71 mA at +5V)
Advanced Features
Equation
processing
Multiple level averaging
Autodump data when SD card is inserted
SD card can also read/write setups
Command-line interface for operation without custom
programs
Separate schedules for each measurement
Upgrade firmware via RS232.
SDI-12 Interface
Supports up to 16 SDI-12 sensors
SDI V1.3 compliant logger
Automatically combines requests to the same device
+12V @ 500 mA
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