Campbell Manufacturing LIQUID LEVEL DB1 Manual De Usuario
DB1 Liquid Level Measurement Sensor
2. Specifications
Measurement Range:
Option - 5
(0 to 5 psi/0 to 11.5 ft.)
Option - 15
(0 to 15 psi/0 to 34.5 ft.)
Option - 30
(0 to 30 psi/0 to 69 ft.)
Maximum Overpressure Range:
Option - 5
20 psi
Option - 10
45 psi
Option - 15
60 psi
Transducer Accuracy:
±
0.05 % Full Scale
Temperature Range:
-25° to + 50°C
Supply Voltage:
12 Vdc
System Current Drain:
75 mA (Activated)
0.5 mA (Quiescent)
Valve Current Drain:
40 mA (Activated)
0 mA (Deactivated)
Maximum System Pressure:
100 psi
3. Installation
Mount the DB1 liquid level assembly to the enclosure back-plate using the
supplied plastic screw grommets and Phillips screws. Using the supplied
tubing cutter, cut sections of tubing for the nitrogen, h1, h2, and offset pressure
lines. Insert the h1 pressure line into the elbow fitting below the valve marked
#1. The line is installed correctly when it does not release without pressing the
red fitting into the valve assembly. Insert the h2 pressure line into the elbow
fitting below the valve marked #2. Insert the offset line into the elbow fitting
to the right of the valve marked #2. Insert the nitrogen supply line into the
elbow fitting on the right side of the manifold assembly.
supplied plastic screw grommets and Phillips screws. Using the supplied
tubing cutter, cut sections of tubing for the nitrogen, h1, h2, and offset pressure
lines. Insert the h1 pressure line into the elbow fitting below the valve marked
#1. The line is installed correctly when it does not release without pressing the
red fitting into the valve assembly. Insert the h2 pressure line into the elbow
fitting below the valve marked #2. Insert the offset line into the elbow fitting
to the right of the valve marked #2. Insert the nitrogen supply line into the
elbow fitting on the right side of the manifold assembly.
Permanently install h1 and h2 a fixed vertical distance apart in the water (see
Figure 2, delta h). Maximize the fixed distance between h1 and h2, while
keeping h1 at least six inches below the surface of the lowest anticipated water
level. If the water level drops below h1 you will get irregular data readings.
The accuracy of the water level measurement is affected by the exactness of
the delta h measurement. To increase measurement accuracy, cut the end of
the submerged tubing at a 60 degree angle to decrease the gas bubble
deformation as it exits the tube.
Figure 2, delta h). Maximize the fixed distance between h1 and h2, while
keeping h1 at least six inches below the surface of the lowest anticipated water
level. If the water level drops below h1 you will get irregular data readings.
The accuracy of the water level measurement is affected by the exactness of
the delta h measurement. To increase measurement accuracy, cut the end of
the submerged tubing at a 60 degree angle to decrease the gas bubble
deformation as it exits the tube.
The DB1 Liquid Level System requires a compressed gas supply. The most
common gas is a 225 ft
common gas is a 225 ft
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nitrogen bottle with an appropriate "automatic
pressure relieved" pressure regulator. The pressure range set on the regulator
depends on the water level to be recorded. For example, if the DB1 system is
installed in a stilling well to measure stream level, and the stream level
depends on the water level to be recorded. For example, if the DB1 system is
installed in a stilling well to measure stream level, and the stream level
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