Precision Water Level Instrument
Unidata Manual 6293 - Precision Water Level Instruments Issue 2.1
29
8 APPENDIX A - 6541L MICROLOGGER
The 6541L is a variant of the UNIDATA Model 8007B Micrologger, designed to
be used with Model 6541 Precision Water Level Instrument.
The MicroLogger is program compatible with the STARLOGGER, supporting
many of its extended features such as SDI-12 and HSIO communications.
8.1 Specifications
Memory: 128K RAM & Reprogrammable 8K
EEPROM.
Inputs/Outputs: 1 x 16 bit Counter Channel.
2 x Analog Channels.
Hi-res 0...2.5V scaled 1.221mV/bit -
A0 & A1
2 x Digital Inputs (Potential Free)
Log Start, SENSE 1.
1 x High Speed Serial I/O Channel.
1 x Open Collector control output
OUT 0.
Precision 5V Reference scan
synchronised with pre-scan.
Analog and Digital Ground.
Power: Operating voltage 6.8 to 18VDC (6V
if 5V Ref is not required).
Operating current: 60mA; standby
current: 50
μ
A.
UPS (User Power Supply) may be
regulated to any voltage up to
battery.
Battery Voltage measurement
(100mV/bit) A2.
Low Battery Detect & Shutdown
(hardware & firmware).
8.2 Mounting
6 x M3 mounting holes.
