ROCTEST FOP, Instruction Manual, Page: 2 / 29

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TABLE OF CONTENTS
1 PRODUCT ........................................................................................................................................... 1
1.1 GAUGE CONSTRUCTION
OF
FOP ............................................................................................ 1
Models FOP and FOP-C .......................................................................................................... 2
Model FOP-P ........................................................................................................................... 2
Model FOP-F ........................................................................................................................... 2
Model FOP-MicroPZ and FOP-PZ .......................................................................................... 2
1.2 CALIBRATION ........................................................................................................................... 3
1.3 FOP SPECIFICATIONS ............................................................................................................... 3
Filter types ................................................................................................................................ 4
1.4 FOP-M
ICRO
PZ SPECIFICATIONS .............................................................................................. 5
1.5 FOP-PZ SPECIFICATIONS ......................................................................................................... 5
2 DATA READING AND ANALYSIS ................................................................................................. 6
2.1 FOP P
REPARATION FOR INITIAL READING
..................................................................................... 6
2.2 P
RE
-
INSTALLATION INITIAL READING
............................................................................................ 6
2.3 FOP-M
ICRO
PZ
AND
FOP-PZ
INITIAL READING
............................................................................. 7
2.4 ON-SITE FUNCTION CHECK (OPTIONAL) ............................................................................. 8
2.5 PRESSURE EQUATIONS
FOR STANDARD
FOP P
IEZOMETERS USING UNIQUE GAUGE FACTOR
... 8
2.6 POLYNOMIAL PRESSURE EQUATIONS
FOR
FOP-M
ICRO
PZ
AND
FOP-PZ P
IEZOMETERS
.... 9
Equation with temperature compensation .............................................................................. 10
2.7 L
INEAR PRESSURE EQUATION FOR PIEZOMETERS WITH GAUGE FACTOR
0001000 ........................ 12
3 INSTALLATION ............................................................................................................................... 13
3.1 FILTER SATURATION FOR FOP PIEZOMETERS ................................................................ 13
Low air entry sintered stainless steel filters ........................................................................... 13
High air entry ceramic filters ................................................................................................. 13
3.2 I
NITIAL READING AFTER INSTALLATION
....................................................................................... 14
3.3 INSTALLATION IN FILL ......................................................................................................... 15
Compacted clay ...................................................................................................................... 15
Granular materials ................................................................................................................. 15
3.4 INSTALLATION IN BOREHOLES .......................................................................................... 16
3.5 CABLE IDENTIFICATION ....................................................................................................... 18
3.6 CABLE ROUTING ..................................................................................................................... 18
Transition from vertical borehole to horizontal trench .......................................................... 18
Horizontal cable runs ............................................................................................................. 18
4 RELATION BETWEEN GAUGE FACTOR AND CALIBRATION FACTOR ......................... 19