Geokon 4410, Инструкция по эксплуатации, Страница: 18 / 22

12
Thermal Coefficient = (Reading in Digits
×
0.000520)
+
3.567)
×
Calibration Factor
Or
K = ((R
1
×
0.000520)
+
3.567)
×
G
Equation 6 - Thermal Coefficient Calculation
Where;
R
1
is the Current Reading.
G is the Calibration Factor supplied with the instrument.
Consider the following example using a Model 4410-5 mm Strandmeter:
R
0
= 4783 digits
R
1
= 5228 digits
T
0
= 15.8° C
T
1
= 27.2° C
G = 0.0006194 mm/digit
K = ((5228
×
0.000520) + 3.567)
×
0.0006194 = 0.00389
Dcorrected = ((R
1
- R
0
)
×
G) + ((T
1
- T
0
)
×
K)
Dcorrected = ((5228 - 4783)
×
0.0006194) + ((27.2 - 15.8)
×
0.00389)
Dcorrected = (445
×
0.0006194) + 0.04435
Dcorrected = 0.2756 + 0.04435
Dcorrected = +0.3199 mm
4.4 Environmental Factors
Since the purpose of the strandmeter installation is to monitor site conditions, factors that may
affect these conditions should always be observed and recorded. Seemingly minor effects may
have a real influence on the behavior of the structure being monitored and may give an early
indication of potential problems. Some of these factors include, but are not limited to, blasting,
rainfall, tidal levels, excavation and fill levels and sequences, traffic, temperature and barometric
changes, changes in personnel, nearby construction activities, seasonal changes, etc.