Installation mécanique TN11

Installation mécanique TN11
Technical Note 11
1(2)
Mechanical Installation
OBJECTIVE
This document gives instructions on the installation of SCA111T, SCA121T, SCA115T and SCA125T
Series inclinometer modules.
APPLICATION DESCRIPTION
VTI Technologies offers a family of inclination measurement modules with various measuring ranges and
two alternative signal interfaces. The module is encapsulated in a metal housing (yellow chromated zinc
casting, protection class IP66).
The function of the sensor is based on change in acceleration (direction of gravity field), so all position
errors or dynamic movements will effect the output signal.
DIMENSIONS AND RECOMMENDED MOUNTING
38
29
14
29
41
φ4
13.5
Figure 1. Dimensions
The sensor module is to be mounted with 2 screws, dimension M4. Mounting torque is 5 ± 1Nm.
Optional mounting bracket mounted with 2 screws, dimension M6. Mounting torque 10 ± 2Nm.
NOTES
•
It is important that the module is parallel to the mounting plane and that output equals the supplied zero
value when sensor is in zero position.
• 1° mounting error from measuring plane will increase the cross-axis sensitivity by 1.7 %
• 1° mounting alignment error around the measuring axis will change the output by 17 mg
•
The illustrations in Table 1 provide information on how the output of the accelerometer module
behaves under different circumstances when installed. Please note that the part can be rotated around
the measuring axis for optimum mounting location.
1 Sep 2005
VTI Technologies reserves all rights to modify this document without prior notice.
Technical Note 11
2(2)
X-channel
Positive inclination
Vout > 2.5 V
Zero position
Vout = 2.5 V
Negative inclination
Vout < 2.5 V
Positive direction
of gravity field
Positive inclination
Vout > 2.5 V
Zero position
Vout = 2.5 V
Negative inclination
Vout < 2.5 V
Positive direction
of gravity field
Positive inclination
Vout > 2.5 V
Zero position
Vout = 2.5 V
Negative inclination
Vout < 2.5 V
Positive direction
of gravity field
Alternative 1
Alternative 2
Y-channel
Alternative 1
Alternative 2
Z-channel
Alternative 1
Alternative 2
Table 1. Positions
ELECTRICAL CONNECTIONS
For connecting the analogue modules, please see Table 1. The module is equipped with a 30cm “pig tail”
PUR cable and it has 0,14mm2 leads.
Name
Function
Pigtail wire
color
GND
Vcc
Out Y
Out X
Out X
Ground
Power supply
Output SCA121T, Y-direction
Output SCA121T, X-direction
Output SCA111T (X-direction)
Blue
Red
Yellow
Green
White
Table 2. Electrical connections
For details on connecting and operating digital modules with RS-485 interface, please see the instruction
manual of digital modules (available on www.vti.fi.).
1 Sep 2005
VTI Technologies reserves all rights to modify this document without prior notice.
VTI Technologies Oy
Myllynkivenkuja 6
P.O.Box 27
FIN-01621 Vantaa
Finland
Tel. +358 9 8791 81
Fax. +358 9 8791 8791
[email protected]
VTI Technologies Oy
Frankfurt Branch
Rennbahnstr. 72-74
D-60528 Frankfurt am Main
Germany
Tel. +49 69 6786 880
Fax +49 69 6786 8829
[email protected]
VTI Technologies, Inc.
One Park Lane Blvd.
Suite 804 - East Tower
Dearborn, MI 48126
USA
Tel. (313) 425 0850
Fax (313) 425 0860
[email protected]
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