Xylem DH-21 - Manual (Page 111)

DH-21
Specifications A-3
GENERAL SPECIFICATIONS
Power Supply
Primary Source:
2 Lithium cells at 3.6 V, 13.5 AH each (User Replaceable)
Or Alternate External Sources Ranging from 6V - 15V
Current Drain: Sleep Mode: 600 A (max)
Active Mode: 75mA (max) @7.2V with computer connected
Dry Air System
A desiccant filled dry air filter prevents moisture from condensing in the “W
ATER LOG,” this provides
automatic compensation for changes in atmospheric pressure without impairing the sensor's accuracy.
Sensor Cables
“W
ATER LOG” to Surface Mounting Enclosure:
Field spliceable 1/4" vented cable allows quick reference to atmospheric pressure and
minimizes the chances of vent blockage by particulates or kinks which are problems
inherent to smaller vent tubes.
Vented, shielded, three-wire cable; 10 foot standard length (longer lengths are available
if required).
Surface Mounting Enclosure to PC or I/0 Device:
The I/0 connector on the mounting enclosure provides an easy interconnect to Lap Top,
Palm Top, PC or Field terminal, etc.
Mechanical Data
Material:
Non-compressible and non-corrosive engineering plastics with polyethylene vent tubing
Size: Probe: 1.425" maximum diameter x 12" long
Well Head Assembly: 1.950" maximum diameter on tube with 2.25" top cap x 22.4"
overall length
Designed to fit in 2" (OR LARGER) WELL BORES.
The “W ATER LOG” includes a surface mounting enclosure which includes battery, RS-232
communication electronics and dry air system. These facilities can be packaged for various applications
such as well top and stream gauging. (Consult factory for information on well and stream gauging
installation packages.)
Warranty
The “W
ATER LOG” is warranted against defects in materials and workmanship for one year from date of
shipment.
Note: Specifications outlined above are subject to change without prior notice due to an ongoing
commitment to testing and product improvement.
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