Table 4 - Engineering Unitsm - Geokon LC-2x4 Instruction Manual

Type Measurement
Type
0
1 Vibrating Wire
2 Vibrating Wire
3 Vibrating Wire Very low frequency sweep, 400-1200 Hz
4 Vibrating Wire
5 Vibrating Wire Very high frequency sweep, 2500-4500 Hz Digits 6250 to 20250 6.250 to 20.250
6 Vibrating Wire
The "Digits" calculation for the Vibrating Wire transducer output when using linear conversion
is based on this equation:
The "Digits" calculation for the Vibrating Wire transducer output when using polynomial
conversion is based on this equation:
Frequency, in the above equations, represents the resonant frequency of vibration of the wire in
the transducer (in Hertz) as determined by the datalogger.
To convert calibration factors (pressure transducers are usually psi per digit) to other engineering
units consult Table 4.
NOTE: In LogView Sensor Settings, when output units are set different than inputs units, a
conversion factor (see Table 4) is automatically applied to the gage factor of each sensor. See the
LogView User's Guide for more information on Sensor Settings.
From →
To
"H 2 O
psi
↓
psi 1 .036127
"H 2 O
27.730 1
'H 2 O
2.3108 .08333
mm H 2 0
704.32 25.399
m H 2 0
.70432 .025399
"HG 2.036 .073552
mm HG 51.706 1.8683
atm .06805 .0024583 .0294996 .0000968
mbar 68.947 2.4908
bar .068947 .0024908 .0298896 .0000981 .098068
kPa 6.8947 .24908
MPa .006895 .000249
Description
Channel Disabled
Middle frequency sweep, 1400-3500 Hz
High frequency sweep, 2800-4500 Hz
Low frequency sweep, 1200-2800 Hz
Low frequency sweep, 800-1600 Hz
Table 3 - Gage Type Descriptions
Digits = frequency
Equation 3 - Digits Calculation using Linear Conversion
Digits = frequency
Equation 4 - Digits Calculation using Polynomial Conversion
'H 2 O mm H 2 0 m H 2 0
.43275 .0014223 1.4223
12 .039372 39.372
1 .003281 3.281
304.788 1 1000
.304788 .001 1
.882624 .0028959 2.8959
22.4196 .073558 73.558
.0968
29.8896 .098068 98.068
2.98896 .0098068 9.8068
.002988 .00000981 .009807
Table 4 - Engineering Units Multiplication Factors
Output
Units
Digits 1960 to 12250 1.960 to 12.250
Digits 7840 to 20250 7.840 to 20.250
Digits
Digits
Digits
× 10
2 -3
2 × 10 -6
"HG mm HG atm
.49116 .019337 14.696
13.596 .53525 406.78
1.133 .044604 33.8983
345.32 13.595 10332
.34532 .013595 10.332
1 .03937 29.920
25.4 1 760
.03342 .0013158 1
33.863 1.3332 1013.2
.033863 .001333 1.0132
3.3863 .13332 101.320
.003386 .000133 .101320
Linear Range Polynomial
Range
160 to 1440 0.160 to 1.440
1440 to 7840 1.440 to 7.840
640 to 2560 0.640 to 2.560
mbar bar kPa
.014503 14.5039 .14503
.40147 401.47 4.0147
.033456 33.4558 .3346
10.197 10197 101.97
.010197 10.197 .10197
.029529 29.529 .2953
.75008 750.08 7.5008
.0009869 .98692 .009869
1 1000 10
.001 1 .01
.1 100 1
.0001 .1 .001
23
MPa
145.03
4016.1
334.6
101970
101.97
295.3
7500.8
9.869
10000
10
1000
1