UNIDATA
Unidata Manual 6293 - Precision Water Level Instruments Issue 2.1
28
7 SPECIFICATIONS:
MODEL 6541 INSTRUMENT
Range: Standard 0 to 65535mm.
Switch to 6553.5mm, 655.35’ or 655.35” to suit
the float pulley used.
Resolution: 1.0mm or 0.1mm, 0.01’ or .01”, depending on
the range selected.
Accuracy: 1 resolution increment, with suitable float
system.
Tracking: Up to 1 shaft revolution per second.
(500mm per second for standard unit).
SDI-12: Compliance: Version
1.3
Mode: Sensor
HSIO Output: High speed serial signal UNIDATA HSIO
standard.
Options for 4-20mA and dual HSIO channels.
Data in, Data out, Sync, Clock
Current Loop:
Range: 4-20 mA
Span / Zero: User programmable
DAC
Resolution:
16-bit
Up to 8 instruments can be daisy chained.
Environmental:
Operating
Temperature:
-10
↔
+60° C
Humidity: 0-100%,
non-condensing.
Power: Internal Alkaline battery pack. Expected life
exceeding 12 months.
External Supply: 7.5 – 18V DC
Exchange battery pack UNIDATA Model
6910A.
Display: 6-digit LCD with low battery indicator.
Construction: Exterior PVC, Aluminium and stainless steel.
Housing: Sealed PVC enclosure - IP65.
Size: Width 180mm, height 275mm and depth
140mm
Weight: 2.7 kg, including battery.
6541 Inst Micrologger
Same as above but with a Model 6541L Micrologger installed. See Appendix A
for details and specifications of the Micrologger.
