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Sensor Installation and Maintenance Guide
1. Installation
1.1. Levelling
Use a water-levelFig 1. Water-level Use the three screws to adjust
properly.
Fig 2. Sensor levelling
Fig 3. Sensor levelling A typical levelling is around ± 1 º
Which means around ± 2 mm for the sensor length
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2. Possible Tests
To check the sensor you can send a testpulse. This will create an event with the response of the sensor.
2.1. GMS-xx
Right click on the specific station and choose “GMS Control”
a
Make sure to have set at last one triggerset and set the threshold to a reasonable value
Choose “Send Request”
Choose under “User request” TSTSENSOR
Add “1” as parameter and press “Send”
The request will be sent to the GMS, executed and the file uploaded to the server.
The file will be stored in C:\GeoDAS_DATA\Incoming\stat ion-name
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2.2. GxR-/GNC-xx
Open the “Instrument Setup Manager”
Go to the “Sampling” Tab Press “Correct the Baseline” Wait a couple seconds until the correction has been done
Go to Tab “Test”
Enable “Record Test Pulse” Push “Put Page”
Push “Run Test Now”
The event will be stored in C:\GeoDAS_DATA\Data\Station-name
2.3. CR-5P
Requirement : The trigger has been set in “Data Streams” Right click on the channel andSensor Installation and maintenance Guide Page 4/12 Right click and push “Send
Testpulse”
The event will be stored in C:\GeoDAS_DATA\Data\channel -name
a
Because the testpulse will be sent to the sensor, the recorder reacts similar to an event. Make sure to enable the Local Trigger in the Datastream Monitor Setup and set the trigger threshold low enough
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2.4. Examples of
testpulse
Fig 5. AC-23 Fig 6. AC-43 Fig 7. AC-63 Fig 8. AC-73 Fig 9. VE-53Sensor Installation and maintenance Guide Page 6/12
2.5. Tilt Test
X – Axis
(Standard calibration Depends on how the sensor is calibrated, see the calibration label on the side)
Fig 10. tilt X - axis
X : + 1 g Y : 0 g Z : - 1 g
Fig 11. tilt X- axis
X : - 1 g Y : 0 g Z : - 1 g
Y - Axis
Fig 12. tilt Y - axis
X : 0 g Y : + 1 g Z : -1 g
Fig 13. tilt Y - axis
X : 0 g Y : - 1 g Z : -1 g
Z - Axis
Fig 14. tilt Z - axis
X : 0 g Y : 0 g
Z : - 2 g (except on a 1g sensor, which can go only up to -1 g)
3. Open and close a Sensor
3.1. Open a sensor
Unscrew the 4 screws on the top Lift up carefully the lid to the side where the cable goes in
Fig 15. Lift up the cover
Do always baseline corrections before you test
Tilt Test can be done only on AC-4x, AC-6x and
AC-7x
Sensor Installation and maintenance Guide Page 7/12 Put the lid on the side
Fig 16. open sensor
3.2. Close the sensor
Make sure the rubber is in the sealing rubber groove (orange arrow)
Begin from the side where the cable goes in
Fig 17. close cover
Make sure not to squeeze the cables
Close carefully the cover and check the rubber (o-ring) is in p lace
Fig 18. close sensor
4. Full scale and offset settings (AC-23 /AC-73)
4.1. AC-23
4.1.1. Offset correction
If you change the full scale of an AC-23, you must readjust the offset.
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Fig 19. AC-23 board Depending on the calibration
-> see the label on the housing
You should measure and adjust for either 0 V or 2.5 V ±0.02 V
4.2. AC-73
4.2.1. Fullscale settings
Set the wished fullscale according the table.
There is no recalibration needed in case changing the fullscale.
Fig 20. AC-73 board
Fullscale X: 1-2: ± 0.2 g 3-4: ± 0.5 g 5-6: ± 1.0 g 7-8: ± 2.0 g Fullscale Z: 1-2: ± 0.2 g 3-4: ± 0.5 g 5-6: ± 1.0 g 7-8: ± 2.0 g Fullscale Y: 1-2: ± 0.2 g 3-4: ± 0.5 g 5-6: ± 1.0 g 7-8: ± 2.0 g -DVM Adjust
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5. Sensor label and orientation
5.1. Label on a sensor
± 10 V : means the maximum output voltage± 2 g : means the maximum fullscale
5.1.1. Sensor Orientation Label
Z Axis is always vertical !
Y
X
Z
Y
X
Z
Z Y TRIAXIAL FLOOR 1 X Z UNIAXIAL V FLOOR 2 Z X BIAXIAL H - V FLOOR 3 Y BIAXIAL H - H FLOOR 4 X Y X Z TRIAXIAL WALL 5 Z UNIAXIAL V WALL 6 X UNIAXIAL H WALL 7 Y UNIAXIAL H l l WALL 8 Z X BIAXIAL H - V WALL 9 Y Z BIAXIAL H - V l l WALL 10 X Y BIAXIAL H - H WALL 11 Y Z X TRIAXIAL CEILING 12 Z UNIAXIAL V CEILING 13 X UNIAXIAL H CEILING 14 Y UNIAXIAL H l l CEILING 15 Z X BIAXIAL H - V CEILING 16 Z Y BIAXIAL H - V l l CEILING 17 Y X BIAXIAL H - H CEILING 18Fig 21. Orientation of the sensors Z Y X Z X Y Y – axis :
Like an arrow from behind seeing the fletching
Y – axis :
Like an arrow from front seeing the tip
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6. Important voltages
6.1. AC-23
6.2. AC-43
V_MAIN_P: Cathode DZ8: 10-15 V GND VA +: UX60 Pin 8: + 8.1 V V_REF: JMP_OS Pin3: 2.5 V VA -: UX60 Pin 4: - 8 V V_MAIN_P: U100Pin 8: 10-15 V GND V_MAIN_P: Cathode DZ8: 10-15 V V_MAIN_P: U100Pin 8: 10-15 V VA +: UX60 Pin 8: + 8.1 V VA -: UX60 Pin 4: - 8 V V_REF: JMP_OS Pin3: 2.5 V VCC: U151 Pin1: + 5 V PIN12:GND PIN11:notusedP IN10: GND PIN9: + 12 V PIN8: GND PIN7: TP PIN6: Z - PIN5: Z + PIN4: Y - PIN3: Y + PIN2: X - PIN1: X + PIN12:GND PIN11:notused PIN10: GND PIN9: + 12 V PIN8: GND PIN7: TP PIN6: Z - PIN5: Z + PIN4: Y - PIN3: Y + PIN2: X - PIN1: X +Sensor Installation and maintenance Guide Page 11/12
6.3. AC-63
6.4. AC-73
VB +: TP102: + 6.5 V VB -: TP104: – 6.5 V V_MAIN_P: TP100: 10-15 V GND: TP101 VCC: TP203: 5 V GND: TP103 V +: TP200 + 7 V V - : TP201 - 7 V GND: TP202 PIN12:GND PIN11:notused PIN10: GND PIN9: + 12 V PIN8: GND PIN7: TP PIN6: Z - PIN5: Z + PIN4: Y - PIN3: Y + PIN2: X - PIN1: X + PIN12:notused PIN11:notused PIN10:GND power PIN9: + 12 V PIN8: GND TP PIN7: TP PIN6: Z - PIN5: Z + PIN4: Y - PIN3: Y + PIN2: X - PIN1: X + V +: TPV+ + 12 V V - : TPV- - 12 V GND: TPGND GND: TPZGND VA +: TPVAZ+ +10 V VA - : TPVAZ- - 10 V GND: TPYGND VA +: TPVAY+ +10 V VA - : TPVAY- - 10 V GND: TPXGND VA +: TPVAX+ +10 V VA - : TPVAX- - 10 VSensor Installation and maintenance Guide Page 12/12
