3
Reading the RSU-V with a Digital Meter
VACUUM
0
kPa
50
kPa
94
kPa
RSU-V
(Standard Instruments)
The DVM shows
0.5 V
The DVM shows
2.63 V
The DVM shows
4.5 V
(10/16) #729
LITHO U
.
S
.
A
.
Optimizing Irrigation . . .
Maximizing Conservation . . .
Worldwide Since 1951
WARRANT Y:
The IRROMETER COMPANY warrants its products against defective
workmanship or materials under normal use for one year from date of purchase. Defective parts
will be replaced at no charge for either labor or parts if returned to the manufacturer during the
warranty period. The seller’s or manufacturer’s only obligation shall be to replace the defective
part and neither seller nor manufacturer shall be liable for any injury, loss or damage, direct or
consequential, arising out of the use of or inability to use the product. This warranty does not
protect against abuse, shipping damage, neglect, tampering or vandalism, freezing or other
damage whether intentionally or inadvertently caused by the user.
®
1425 Palmyrita Ave., Riverside, CA 92507
951-682-9505 •
FAX
951-682-9501
www.IRROMETER.com
Remote Sensing Units – RSU-V
Multi-conductor wire can be used and twisted pairs are recommended. All
splices should be made with direct burial type waterproof splices, Spears
DBY
®
or similar. The following table presents recommended maximum
limits for cable extensions to RSU-V transducers. Following these
guidelines should ensure that the voltage loss created by the wire length
will not exceed 1 Centibar (kPa) of the calibrated value.
DISTANCE WIRE
SIZE
Up to 200 ft. (61 m) .. . . . . . . AWG UF 18 (1.02 mm, 0.82 sq mm)
Up to 300 ft. (91 m) .. . . . . . . AWG UF 16 (1.29 mm, 1.31 sq mm)
Up to 400 ft. (121 m) .. . . . . . AWG UF 14 (1.63 mm, 2.08 sq mm)