|
1. Introduction
Soil Instruments' various Vibrating Wire readouts have different sweep range selections. The Vibrating Wire sweep range selection is determined by the frequency range of the instrument you are reading.
This information is normally supplied in the instrument user manual or data sheet e.g. if the instrument has a specified frequency range of 1700 to 3000 Hz then select the smallest range that encompasses the instruments specified range.
This article outlines the sweep ranges available on each logger and readout along with the sweep ranges for each instrument.
2. Sweep Ranges on a Soil Instruments Handheld Readout unit
|
Handheld Readout
|
|
Sweep Range ID
|
Sweep Range Values
|
|
1
|
0450 - 1250 Hz
|
|
2
|
0800 - 2000 Hz
|
|
3
|
1400 - 3500 Hz
|
|
4
|
2400 - 6000 Hz
|
|
|
|
Sweep Range ID
|
Sweep Range Values
|
|
1
|
0202 - 1562 F²/1000
|
|
2
|
0640 - 4000 F²/1000
|
|
3
|
1960 - 12250 F²/1000
|
|
4
|
5760 - 36000 F²/1000
|
Table 1. VW Handheld Readout sweep ranges
3. Sweep Ranges on a 4 channel logger or Mini logger
|
4 channel logger/mini logger
|
|
Sweep Range ID
|
Sweep Range Values
|
|
A
|
0450 - 1125 Hz
|
|
B
|
0800 - 2000 Hz
|
|
C
|
1400 - 3500 Hz
|
|
D
|
2300 - 6000 Hz
|
|
|
|
Sweep Range ID
|
Sweep Range Values
|
|
A
|
0202 - 1562 F²/1000
|
|
B
|
0640 - 4000 F²/1000
|
|
C
|
1960 - 12250 F²/1000
|
|
D
|
5290 - 36000 F²/1000
|
Table 2. 4 channel logger or Mini logger sweep ranges
4. Sweep Ranges on a Data Recorder
|
Data Recorder
|
|
Sweep Range ID
|
Sweep Range Values
|
|
A
|
0450 - 5000 Hz
|
|
B
|
1200 - 3500 Hz
|
|
C
|
0400 - 1200 Hz
|
|
D
|
1800 - 3500 Hz
|
|
E
|
2500 - 6000 Hz
|
|
F
|
2500 - 4000 Hz
|
|
|
|
Sweep Range ID
|
Sweep Range Values
|
|
A
|
0202 - 25000 F²/1000
|
|
B
|
1440 - 12250 F²/1000
|
|
C
|
0160 - 1440 F²/1000
|
|
D
|
3240 - 12250 F²/1000
|
|
E
|
6250 - 36000 F²/1000
|
|
F
|
6250 - 16000 F²/1000
|
Table 3. Data recorder sweep ranges
5. Sweep ranges recorded for Soil Instruments Vibrating Wire instrumentation
Depending on the type of instruments you are trying to read, you will need to select a different sweep range. Table 4 outlines which sweep range will be needed for each individual Vibrating Wire Instrument
|
Instrument
|
Signal Range
|
Handheld
|
4 Channel/Mini logger
|
Data Recorder
|
|
VW Piezometer W4
|
1700-3400Hz
|
3
|
C
|
D
|
|
VW Piezometer W9
|
1700-3400Hz
|
3
|
C
|
D
|
|
VW Pressure Cell P6 & P10
|
1700-3400Hz
|
3
|
C
|
D
|
|
VW Joint and Crackmeters J1,2,3,4
|
1500-3400Hz
|
3
|
C
|
B
|
|
VW Rod Extensometers E10
|
1500-3400Hz
|
3
|
C
|
B
|
|
VW Soil Extensometers E7
|
1500-3400Hz
|
3
|
C
|
B
|
|
VW Load Cells L2
|
2000-3000Hz
|
3
|
C
|
D
|
|
VW Push In Pressure Cells P9
|
1700-3400Hz
|
3
|
C
|
D
|
|
VW Strain Gauges ST2,3,4
|
400-1200Hz
|
1
|
A
|
C
|
|
VW Spot Weldable Strain Gauge ST1
|
1000-3000Hz
|
3
|
C
|
B
|
|
VW Rebar Strain Gauge ST5,6
|
1400-2500Hz
|
3
|
C
|
B
|
|
VW Settlement Cells S8
|
1700-3400Hz
|
3
|
C
|
D
|
|
VW Weir Sensor W10
|
2000-3500Hz
|
3
|
C
|
D
|
|
VW Temperature Sensor T3
|
2000-3500Hz
|
3
|
C
|
D
|
Table 4. VW instruments sweep ranges
If you have any further queries, please submit a ticket on the support site or call Soil Instruments on +44 01825 765044 for advice.
Checked MO'R v1.0 20/05/15
|
Data Recorder
|
|
Sweep Range ID
|
Sweep Range Values
|
|
A
|
0450 - 5000 Hz
|
|
B
|
1200 - 3500 Hz
|
|
C
|
0400 - 1200 Hz
|
|
D
|
1800 - 3500 Hz
|
|
E
|
2500 - 6000 Hz
|
|
F
|
2500 - 4000 Hz
|
|
|
|
Sweep Range ID
|
Sweep Range Values
|
|
A
|
0202 - 25000 F²/1000
|
|
B
|
1440 - 12250 F²/1000
|
|
C
|
0160 - 1440 F²/1000
|
|
D
|
3240 - 12250 F²/1000
|
|
E
|
6250 - 36000 F²/1000
|
|
F
|
6250 - 16000 F²/1000
|
| 
(1 votes)
This article was helpful
This article was not helpful