Users’ Manual
ESM-12S Digital seepage monitoring system
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7
4 INSTALLATION PROCEDURE
4.1 Sensor check before installation
Check that the seepage sensor is functioning properly. The reading of the sensor should be zero.
4.2 Installation of V-notch and seepage sensor
Fix the overflow plate V-notch in the concrete reservoir or channel, generally as shown in figure below.
Fix the V-notch, with the help of groutable anchors, at the planned location, perpendicular to the
channel, verifying with a spirit/mason’s level that the plate is vertical. Ensure a complete tightness at
the contact between the concrete and the plate. The tapered/chamfered edge of the V-notch should
be facing the downstream side.
NOTE:
A typical installation method is described here. However, suitable changes may be required,
depending on site conditions.
Install the PVC perforated pipe, with seepage sensor mounted inside it, at its planned location (as
shown in figure below). Following points needs attention while selecting the mounting location for
seepage sensor.
1. The distance of seepage sensor from V-notch must be at least
four times the maximum head
(upstream) on the weir i.e. height of notch
. Verify the verticality of the seepage sensor with
spirit/mason’s level during installation.\
2. The seepage sensor position
should be kept submerged in water, lower than the vertex of
weir
. Any change in water level results in change in water head, which is measured by the pressure
sensor.
3. The perforated PVC pipe of the sensor assembly is provided with two ring markings (for minimum and
maximum water level). The sensor assembly will have to be mounted such that expected maximum
and minimum water level is always between these marked rings.
Collecting channel
Tranquilizer
(Client scope)
Overflow plate
(V-notch weir)
Anchors
Concrete channel
(Client scope)
4H
15 -
20H
H
Level sensor
clamped on wall
Figure 4-1 Typical installation scheme for EPS-12S seepage monitoring system in open channel with weir
