Hydrological Services Pty Ltd
Data Logger Model ML1-420
©
Copyright
ML1-420 100-27
Issue 1.00 6 Apr, 2011
5. Specification
5.1 Hardware
Specification
Microprocessor
Microchip PIC18F2680 nanowatt processor
Program Memory
Internal to microprocessor (64K bytes)
Program Upgrade
Via RS232 WinComLog Application
Data Memory
SST25VF032 32Mbit (=4MB) Serial Flash EPROM
Parameter Memory
EEPROM internal to microprocessor (1024 bytes)
Events Recorded
400,000 events, 1 second resolution
Real Time Clock
Day/Month/Year Hour/Minute/Second (32768 Hz crystal)
Accuracy
adjustable
under
software
control
Inputs
1 x Digital input (for rain or flow etc..)
(Maximum recording rate = 30 events per second)
1 x 4-20mA Analog Input (16 bit A-D sample)
1 x external Battery Voltage measurement (10 bit A-D sample)
(+ Internal AA battery and temperature measurement)
Indicators
LED
indicator
Connections
1 x DB9 screwless spring clamp terminals
Communications
RS232 Port (Tx, Rx)
Power Supply
1 x Internal 3.6V Lithium AA cell (2 years operation)
OR
1 x Internal 1.5V Alkaline AA cell (1 year operation)
OR
1 x Internal 1.2V NiMH AA cell (low self dischg - 6 months)
External Supply 12V DC nominal (6V to 19V DC)
(required to power 4-20mA transducer)
(All
RS232
inputs
diode-ored together with 12V supply)
Dimensions
70mm x 60mm x 40mm (W x H x D) (excludes gland)
70mm x 80mm x 40mm (W x H x D) (includes gland)
Weight
200
grams
Environmental
-40C to + 70C at 95% RH Non Condensing
Aluminium
waterproof
housing
IP67
