low battery
indicator
water
indication
light
buzzer
sensitivity
adjustment
on/off switch
OPERATION
Waterra has designed the
WS-2 Water Level Sensors
as lightweight, com-
pact, water level measuring devices. They feature both enclosed reels with very
narrow profiles and more traditional open reels. The WS-2 closed reel can carry
up to 30 meters or 100 feet of flat tape. The WS-2 open reels can carry 50, 75,
100, 200 or 500 meters or 250 feet of flat tape.
The electronics module located in the hub of the reel contains the batteries,
electronic circuit board, buzzer, light, on/off membrane switch and sensitivity
adjustment knob.
The on/off switch has a built-in timer so that the unit will automatically turn
itself off after three minutes. This feature is designed to extend battery life.
When the WS-2 is turned on, the battery light will be illuminated continuously.
Low batteries are indicated by a flashing signal from the battery light indicator.
When the WS-2 water level probe contacts water, the buzzer will emit a contin-
uous tone and the water light will illuminate. In some groundwater conditions,
the probe may not adequately detect the water in the well. This may be caused
by low salinity. When this happens, the sensitivity of the unit can be adjusted
by rotating the sensitivity adjustment knob located on the left side of the front
hub panel.
open reel — counter clockwise
The
WS-2 open reel
winds the flat tape
back onto the reel by rotating the handle in
the counter clockwise direction.
closed reel — clockwise
The
WS-2 closed reel
must be rotated in
the clockwise direction to wind the tape
back onto the reel.
OPERATION
adjusting the conductivity sensitivity setting
In order to allow the WS-2 to detect water of various salinity, the design in-
cludes a sensitivity adjustment knob. This knob is located on the left side of the
front hub panel. In monitoring wells where excessive bridging is experienced,
the knob should be rotated to the left. Where water of low salinity is suspected,
the knob should be rotated to the right. The optimum setting is obtained by
adjusting the control knob to the point where the WS-2 is no longer emitting the
water signal while the probe is immersed in the well. Then rotate the knob back
in the opposite direction slowly, stopping when the water signal begins again.
winding the reel
The flat tape on WS-2 open reels and WS-2 closed reels must always be wound
back onto the reel by rotating the handle in the correct direction, however the
direction of winding is not the same for both of these reel formats. Winding the
tape back onto the reel in the wrong direction will cause problems. Additionally
it is important with both reel designs that the tape be spread evenly across the
spool as it is wound back into the reel. This can be done by rocking the reel from
side to side as the tape is being wound up.
