ENCARDIO RITE EDS-71P, User Manual

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Users’ Manual EDS-71V/P Single point borehole extensometer
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TEST CERTIFICATE
Customer ABC Corporation
PO # PHP 050-05 October 28, 2005
Instrument
V.W Displacement sensor for Bore hole
Extensometer
Serial number 05508
Date
09.11.200
5
Range 50 mm
Temperatur
e 25°C
Input Observed value
Average End Point Poly
Displacement Up1 Down
Up2 Fit Fit
(mm) (Digit) (Digit)
(Digit) (Digit) (mm) (mm)
0.00 2297.4 2294.0
2294.0 2296 0.00 0.00
10.00 3437.8 3432.1
3432.1 3435 10.08 10.00
20.00 4570.7 4567.8
4567.8 4569 20.12 20.01
30.00 5700.8 5695.9
5695.9 5698 30.11 30.00
40.00 6824.1 6821.4
6821.4 6823 40.05 39.99
50.00 7947.7 7947.7
7946.0 7947 50.00 50.01
Error (% fs) 0.23 0.03
Digit f ² X 10E-3
Linear gage factor (G) 8.848E-03 mm/digit
Thermal factor(K) -0.003 mm/°C
Polynomial constants A= 1.4276E-08
B= 8.7037E-03 C=
2.0061E+
01
Displacement "D" is calculated with the following equation:
Linear D(mm) =G(R
1
-R
0
) - K(T
1
-T
0
)
Polynomial D(mm) = A(R
1
)² + B(R
1
) + C - K(T
1
-T
0
) -D
0
R
1
= current reading & R0 is initial reading in digit.
D
0
= Initial reading in mm
Zero reference (initial position) in the field must be established by recording the initial reading R
0
(digit)
along with temperature T
0
(°C) just after installation.
Note Zero displacement reading given in above calibration chart is taken at 3 mm
from mechanical
zero
Pin configuration/wiring code:
Red & black Signal
Green & white Thermistor