Solinst Levelogger Series Quick Start Manual page 5

Levelogger Edge Field Measurement
Levelogger Edge Ranges
Each model of Levelogger is rated for a specific submergence depth (Table 1).
The choice of model largely depends on the accuracy of the water level required
and the submergence depth. The selection, however, should be based on the
maximum anticipated water level fluctuation.
Submergence
Model
Depth
Barologger
F15, M5
F30, M10
F65, M20
F100, M30
F300, M100
Table 1 - Levelogger Edge Range
d
D
H
Zero Point
Levelogger Series Quick Start Guide
Air only
16.4 ft, 5 m
32.8 ft, 10 m
65.6 ft, 20 m
98.4 ft, 30 m
328.1 ft, 100 m
Measurement Fundamentals
Leveloggers
pressure acting on a transducer at their
zero point/sensor. The total pressure
is caused by the column of water lying
above the Levelogger pressure sensor
AND the barometric (atmospheric)
pressure acting on the water surface.
To compensate for barometric pressure
B fluctuations and get true height of
water column measurements
Barologger
Levelogger Reading (L)
Barologger Reading (B)
Height of Water Column (H)
Verifying Readings
The
compare barometrically compensated
Levelogger data
L
depth to water level value
Water Level Meter). The deployment
depth of the Levelogger
manual depth to water measurement
(d)
, should equal the compensated
Levelogger reading, i.e.:
Deployment Depth (D)
Height of Water Column (H)
Accuracy
± 0.05 kPa
± 0.010 ft, 0.3 cm
± 0.016 ft, 0.5 cm
± 0.032 ft, 1 cm
± 0.064 ft, 1.5 cm
± 0.164 ft, 5 cm
(L)
measure the total
(B)
is required, i.e.:
-
=
best recommendation
(H)
with a measured
(d)
(D)
, minus the
-
Depth to Water (d)
=
- 5 -
Note
The Levelogger Edge
can withstand over-
pressurization of 2 times
the intended range,
e.g. a Model M10/
F30 can accommodate
a fluctuation of 20
meters or 60 feet and
still record pressure.
However, over-range
accuracy is not
guaranteed.
Barologger Edge
A single Barologger can
be used to compensate
all Leveloggers on site,
within a 20 mile/30 km
(H)
radius and with every
, a
1000 ft (300 m) change
in elevation.
Tip
To adjust all readings in
your Levelogger file to
depth to water below a
is to
well casing
a manual water level
measurement using
(using a
a water level meter.
This reading should
correspond in date and
time with an actual
Levelogger recording.
Use this as a reference
datum in the Manual
Data Adjustment option
in the Levelogger
Software Data
Compensation Wizard.
(d)
, record