Temposonics
®
®
Magnetostrictive, Absolute, Non-contact
Linear-Position Sensors
G-Series Redundant Models GT2 and GT3
Analog (Voltage/Current)
Data Sheet
SENS
O
RS
Document Part Number
551102 Revision A
Model GT3 rod-style redundant position sensor
FEATURES
Offers Redundancy for Enhanced Safety Applications
Linear, Absolute Measurement
Contains Up to Three Separate, Independent Measuring
Systems in a Single Compact Housing
Non-Contact Sensing Technology
Superior Accuracy, Linearity Deviation Less Than 0.02%
Repeatability Within 0.001%
Fully Adjustable Analog Outputs (Voltage or Current) Within:
-10 to +10 Vdc or 0 to 20 mA
BENEFITS
Rugged Industrial Sensor
Compact Design with a Standard Size 10 mm (0.39 in.) O.D.
Stainless-Steel Rod
Uses Standard Mounting
APPLICATIONS
Ideal for High-Safety Applications Requiring Redundancy
Continuous Operation In Harsh Industrial Conditions
High Pressure Conditions
TYPICAL INDUSTRIES
Power Plants
Water and Wind Turbine Pitch Settings
Marine Propellers
Ship Control Systems
Floodgate Control
Time-based Magnetostrictive position sensing principle
Movable position magnet
Magnetic field encompasses
entire waveguide - generated
by the interrogation pulse
Interrogation
Return wire
Waveguide
Strain-Pulse detector
Bias magnet
Magnetic field from
position magnet
Interaction of magnetic
fields causes waveguide to
generate a strain pulse
Benefits of Magnetostriction
Temposonics linear-position sensors use the time-based magneto-
strictive position sensing principle developed by MTS. Within the
sensing element, a sonic-strain pulse is induced in a specially designed
magnetostrictive waveguide by the momentary interaction of two
magnetic fields. One field comes from a movable permanent magnet
that passes along the outside of the sensor. The other field comes
from an “interrogation” current pulse applied along the waveguide.
The resulting strain pulse travels at sonic speed along the waveguide
and is detected at the head of the sensing element.
The position of the magnet is determined with high precision and
speed by accurately measuring the elapsed time between the applica-
tion of the interrogation pulse and the arrival of the resulting strain
pulse with a high-speed counter. The elapsed time measurement is
directly proportional to the position of the permanent magnet and is
an absolute value. Therefore, the sensor's output signal corresponds
to absolute position, instead of incremental, and never requires
recalibration or re-homing after a power loss. Absolute, non-contact
sensing eliminates wear, and guarantees the best durability and output
repeatability.
All specifications are subject to change. Contact MTS for specifications and
engineering drawings that are critical to your application. Drawings contained
in this document are for reference only. Go to http://www.mtssensors.com for
the latest support documentation and related media.
Product Overview and Specifications
Product overview
G-Series model GT sensors are extremely robust and are ideal for continuous operation under harsh industrial conditions. The rod housing
is capable of withstanding high pressures such as those found in hydraulic cylinders. G-Series redundant sensors provide accurate,
linear-position measurement for applications that benefit from redundancy due to safety relevant functions.
G-Series Redundant sensors feature two or three independent measuring systems contained in one compact housing. Each measuring
system contains its own channel with sensor element, power and evaluation electronics and output signal. Each channel has it's own output
connector or cable.
All sensor elements are integrated in one pressure proofed, high-grade steel rod. Rod and housing style feature the approved standard
dimensions with 10 mm (0.39 in.) diameter rod and 3/4-16 UNF or M18 x 1.5 threaded hex flanges. The redundant sensor easily installs in
applications measuring linear movements of control valves, linear drives, fluid cylinders and machines.
Product specifications
Parameters
OUTPUT
Specifications
Position
Analog:
Infinite (restricted by output ripple)
< 1 ms (typical)
< ± 0.02% full stroke (minimum ± 50 µm)
< ± 0.001% of full stroke (minimum ± 2.5 µm)
< 4 µm
Model GT2:
2 output channels
Model GT3:
3 output channels
Voltages (Fully adjustable):
0 to 10, 10 to 0, -10 to +10, +10 to -10 Vdc
(minimum controller load >5k ohms)
Current (Fully Adjustable):
4 (0) to 20 mA, 20 to 4 (0) mA
(min./max. load 0/500 ohms)
GT2/GT3:
Analog:
50 mm (2 in.) to 2900 mm (1015 in.)
+24 Vdc nominal:
-15 or +20%
Polarity protection:
up to -30 Vdc
Overvoltage protection:
up to 36 Vdc
Current drain:
100 mA typical per channel
Dielectric withstand voltage:
500 Vdc
(DC ground to machine ground)
Setpoint adjustment (Null/Span):
100% of electrical stroke length, 50 mm (2
in.) minimum distance between setpoints.
Parameters
ENVIRONMENTAL
Specifications
Operating temperature:
-40 °C (-40 °F) to +75 °C (167 °F)
Relative humidity:
90% no condensation
Emissions:
IEC/EN 61000-6-3
Immunity:
IEC/EN 61000-6-2
IEC/EN 61000-4-2/3/4/5/6/8,
level 3/4 criterium A, CE qualified
100 g (single hit)/
IEC standard 68-2-27 (survivability)
5 g /10 to 2000 Hz, IEC standard 68-2-6
(operational)
6-pin male D60 (M16) connector or
integral cable
Aluminum housing
IP 67
304L stainless steel
350 bar static, 690 bar peak
(5000 psi static, 10,000 psi peak)
Any orientation. Threaded flange M18 x 1.5
or 3/4 - 16 UNF-3A
45 N-m (33 ft. - lbs.)
Ring magnet, open-ring magnet, or magnet
float
Measured output
variables:
Resolution:
Update times:
Linearity
deviation:
Repeatability:
Hysteresis:
Analog Outputs:
Operating
conditions:
EMC test:
Shock rating:
Vibration rating:
WIRING
Connection type:
ROD STYLE SENSOR (MODEL GT2/GT3)
Electronic head:
Sealing:
Sensor rod:
Operating
pressure:
Mounting:
Typical
mounting torque:
Magnet types:
Stroke Length:
ELECTRONICS
Operating
voltage:
Setpoints:
G-Series Redundant, Models GT2/GT3 Temposonics
®
Linear-Position Sensors - Analog Output
Product Data Sheet, Document Part No.: 551102, Revision A 04/10, 07/11
2
MTS Sensors
G-Series Models GT2 and GT3 Redundant Sensors
Output and Programming Options
Output options
G-Series rod-style redundant sensors are available with analog (voltage and current) outputs. The G-Series redundant, model GT2 sensor
provides two output channels, and model GT3 provides three output channels.
ANALOG (VOLTAGE/CURRENT)
G-Series analog sensors provide direct signals,
including voltage (0 to 10 Vdc or -10 to +10
Vdc, foward or reverse acting) and current
(4 to 20 mA, or 0 to 20 mA, forward or reverse
acting).
(see ‘Figure 1’).
Both voltage and current
outputs allow full adjustments of null and span
setpoints (minimum 2 in. between setpoints).
Since the outputs are direct, no signal-conditioning
electronics are needed when interfacing with
controllers or meters.
Active stroke length
(Measuring range)
Output value
w
For
Temposonics
G-Series
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in
Act
ard
g
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To controller, meter or
other device:
0 to 10 Vdc
10 to 0 Vdc
-10 to +10 Vdc
+10 to -10 Vdc
4 to 20 mA
20 to 4 mA
0 to 20 mA
20 to 0 mA
Dead
zone
Setpoint 1
(Null)
Setpoint 2
(Span)
Figure 1.
Single magnet analog output diagram
Advanced communications and programmability
SENSOR FIELD PROGRAMMING AND G-SERIES PC PROGRAMMING KIT
Temposonics G-Series Redundant sensors are preconfigured at
G-Series PC setup software is shipped with the sensor and can also be
the factory by model code designation. For many applications
downloaded from www.mtssensors.com. You can use the PC setup
no adjustments are required for normal sensor installation and
software to configure, diagnose, monitor and program your G-Series
operation. If, however, sensor parameter changes are desired while
sensor in the field without opening the sensor’s electronics housing.
in the field, the G-Series Redundant sensor is easily programmed
This can simplify installation and commissioning, saving valuable
by using the G-Series PC Programming kit
(see 'Figure 2').
time. Keeping the sensor electronics isolated ensures that seal
integrity and the highest product reliability are maintained.
G-Series Analog PC Programming Kit (part no.: 253311-1)
includes the following components:
•
Wall adapter style power supply (24 Vdc output)
•
USB Serial converter box with USB cable to connect to PC
•
Two conection cables:
– Cable for sensor ordered with the D60 integral
connector option.
– Cable with quick connects for sensor ordered with the
integral cable option.
•
G-Series Analog PC Setup software, on CD-ROM
(for Windows XP or higher)
Figure 2.
G-Series PC Programming Kit, part no. 253311-1
MTS Sensors
3
G-Series Redundant, Models GT2/GT3 Temposonics
®
Linear-Position Sensors - Analog Output
Product Data Sheet, Document Part No.: 551102, Revision A 04/10, 07/11
G-Series Models GT2 and GT3 Redundant Sensors
Monitoring, Diagnostics and Advanced Programmability
G-Series PC Setup and Configuration Software Interface
VISUAL SOFTWARE INTERFACE
The G-Series PC Setup and configuration software provides a user-
friendly interface
(see ‘Figure 3’)
along with the sensor's advanced
technology enables the operator to take advantage of the following
features:
•
Built-in serial interfaces for robust hard-wired serial
communication (RS-485).
•
Remote programmability for operational modes and sensor
parameters
(see 'Table 1).
ANALOG (VOLTAGE/CURRENT) OUTPUT FEATURES
Voltage or current output mode
Voltage or current output range
Full adjustment for Null and Span setpoints
Table 1.
Remote programmability and operational modes
Figure 3.
G-Series PC setup software interface examples
G-SERIES HANDHELD PROGRAMMER ACCESSORY FOR ANALOG OUTPUT
Programming for your G-Series analog output sensor can be
achieved in the field using the G-Series Analog Handheld program-
mer accessory, part no. 253853
(see ‘Figure 4’).
Using the G-Series Analog Handheld Programmer, magnet positions
and corresponding output values can be adjusted for the beginning
of stroke (Setpoint 1) and for the end of stroke (Setpoint 2) that
is actually needed for the specific application. These adjustments
are easily done, even when the sensor is not directly accessible,
by connecting the programmer to the sensor's integral cable or
extension cable.
Additionally, the programmer has it's own red and green LEDs
to provide a remote display of the sensor's status and error
diagnostics.
For detailed information refer to the G-Series Analog Handheld
Programmer Operating Instructions
(document part no.: 551024)
available at http://www.mtssensors.com.
Figure 4.
G-Series Analog Handheld Programmer
(part no.: 253853). Front and back views shown.
G-Series Redundant, Models GT2/GT3 Temposonics
®
Linear-Position Sensors - Analog Output
Product Data Sheet, Document Part No.: 551102, Revision A 04/10, 07/11
4
MTS Sensors
G-Series Models GT2 and GT3 Redundant Sensors
Dimension References
Models GT2/GT3 rod-style sensor dimension references
Note:
When mounting the sensor, use a basic wrench
(see ‘Figure 5')
with a maximum 8 mm (0.31 in.) thickness to ensure tightening torque is only applied
to the hex flange and not to the electronics housing.
70 mm (2.76 in.)
across wrench flats
< 8 mm
(0.31 in.)
45 N-m
(33 ft. - lbs.)
Figure 5.
Basic wrench
Temposonics G-Series rod-style sensors (Models GT2/GT3) offer modular construction, flexible mounting configurations, and easy installa-
tion. Models GT2/GT3 sensors are designed for mounting in applications where high pressure conditions exist (5000 psi continuous, 10,000
psi spike), such as inside hydraulic cylinders
(see 'Figure 8' on page 7).
Both GT2 and GT3 sensor models can also be mounted externally in
many applications.
MODEL GT3 ROD-STYLE SENSOR WITH RING MAGNET (MAGNET ORDERED SEPARATELY)
Drawing is for reference only, contact applications engineering for tolerance specific information.
80 mm
(3.15 in.)
Raised surface
36 mm (1.42 in.) dia.
0.5 mm (0.02 in.) height
3/4 - 16 UNF
or
M18 x 1.5
70 mm
(2.76 in.)
O-Ring
D60
integral connector
80 mm
(3.2 in.)
Dead zone
51 mm
(2 in.)
Stroke length
63.5 mm
(2.5 in.)
13 mm
(0.5 in.)
Figure 6.
Models GT3 Rod-style sensor dimension reference (shown with
D60
integral connection type)
MODEL GT3 ROD-STYLE SENSOR WITH INTEGRAL CABLE (MAGNET ORDERED SEPARATELY)
Drawing is for reference only, contact applications engineering for tolerance specific information.
Raised surface
36 mm (1.42 in.) dia.
0.5 mm (0.02 in.) height
3/4 - 16 UNF
or
M18 x 1.5
70 mm (2.76 in.)
across hex flats
O-Ring
Integral cable
F_ _
30 mm
(1.2 in.)
80 mm
(3.2 in.)
Dead zone
51 mm
(2 in.)
Stroke length
63.5 mm
(2.5 in.)
Figure 7.
Model GT3 Rod-style sensor dimension reference (shown with integral cable)
MTS Sensors
5
G-Series Redundant, Models GT2/GT3 Temposonics
®
Linear-Position Sensors - Analog Output
Product Data Sheet, Document Part No.: 551102, Revision A 04/10, 07/11
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