Atlas Copco IRTT-B 1A-I06 User manual

User guide
Analog Rotary Transducer (IRTT-B)
9836 4436 01
2010-01

IRTT-B User Guide
9836 4436 01 Revision 2010-01 3 (8)
Safety Instructions
CAREFULLY READ THIS MANUAL PRIOR TO USING
THE PRODUCT AND SCRUPULOUSLY COMPLY WITH
THE FOLLOWING SAFETY INSTRUCTIONS.
When using electric products, basic precautions should always be
taken, including the following:
•Read all instructions before using the product.
•Do not expose the system to excessive moisture (dripping or
splashing), and do not use it near water (near a washbowl, or in
a wet basement) or other liquids.
•The product should not be subjected to continuous or excessive
shock or vibration.
•For minimum electrical interference, use the product far away
from possible sources of electrical noise (arc welding
equipment etc).
•There are no user serviceable parts inside the product. Hence,
under no circumstances should you open or resume to repair
the product. Doing so will invalidate all warranties. Refer all
service needs to your local Atlas Copco service personnel.
WARNING
Don’t torque the IRTT-B over its torque capacity. This
will cause the yielding of the transducer!
EC Declaration of conformity
Individual machinery and safety components:
We Atlas Copco BLM – Paderno Dugnano - ITALY declare under
our sole responsibility that the product to which this declaration
relates, is in conformity with the requirements of the Council
Directive of 22 June 1998 on the approximation of the laws of the
Member States relating to machinery (98/37/EEC).
Information on Waste of Electrical and Electronic Equipment:
This product and its information meets the requirements of the
WEEE Directive (2002/96/EC) and successive modifications. See
the last chapter of this manual for details.
The products and their components and/or batteries that must be
treated as WEEE when at end of life are marked with a crossed
trashcan according to WEEE (2002/96/EC). See figure below:
In the European Union, this symbol indicates that products must
not be disposed of as unsorted municipal waste but must be dealt
with separately, in accordance with the WEEE Directive
(2002/96/EC).
At the end of its life, this product must be disposed of according to
local regulations.
Collecting properly the wasted parts for consequent shipment to
recycling process, to the treatment and to the environmental
compatible dismiss contributes to avoid possible negative effects
on the environment, on health and helps the re-use and/or recycling
of the materials composing the equipment.
The abusive product dismissing by the user implicates
administrative sanctions according to the present regulation.
Name of issuer Position Signature
Frédéric Genestout General Manager
Ovidio Scarpulla Product Quality Manager

IRTT-B User Guide
4 (8) 9836 4436 01 Revision 2010-01
GENERAL
The IRTT-B transducer provides torque measurement on a rotary
transducer, with optional angle reading.
The torque measurement is performed with a precise extensometer
bridge with special brushes to transfer the signal from the rotating
shaft to the housing; these brushes have been developed to be very
reliable and should not have the need of any maintenance through
out its life.
The angle reading is performed with a rotating magnetic sensor
providing 1024 pulses per revolution.
A built in memory stores identification and calibration data for
automatic reading from the measurement instrument.
TECHNICAL
•Torque Measurement Range: 1 ÷ 5000 Nm
•Angle (optional): 1024 pulses per turn
•Static accuracy: ± 0.25% of rated max. transducer capacity
•Overload capacity: 125% of rated max. transducer capacity
•Temperature stability: 0.1% of capacity / °C
•Bridge resistance: 350 ohm
•Operation humidity: 10-75% non condensing
•Operating temperature: 5 to 40°C
The transducer comes with Atlas Copco BLM calibration
certificate.
The calibration data is marked on the transducer label (when
installing the item always use this data, not the nominal values)
CONNECTOR PIN OUT
TRANSDUCER BUILT IN MEMORY
The built in memory consist in a eeprom, which stores the
following data:
•Identification
•Calibration (Nm)
•Full scale value (% of cal. Value)
•Sensitivity (2mV/V)
•Pulses / rev
•Serial Number.
•Date of latest calibration
•Next Calibration date
•Source of Calibration
TORQUE ONLY MODELS
Model Capacity (Nm) Drive Ordering No.
5-I06 5 ¼” hex 8059 0942 05
20-I06 20 ¼” hex 8059 0942 10
20-06 20 ¼” square 8059 0942 15
25-10 25 3/8” square 8059 0942 20
75-10 75 3/8” square 8059 0942 25
180-13 180 1/2” square 8059 0942 30
500-20 500 ¾” square 8059 0942 35
750-25 750 1” square 8059 0942 40
1400-25 1400 1” square 8059 0942 45
3000-38 3000 1 ½” square 8059 0942 52
5000-38 5000 1 ½” square 8059 0942 56
TORQUE AND ANGLE MODELS
Model Capacity (Nm) Drive Ordering No.
1A-I06 1 ¼” hex 8059 0943 96
2A-I06 2 ¼” hex 8059 0943 01
5A-I06 5 ¼” hex 8059 0943 06
5A-06 5 ¼” square 8059 0943 08
20A-I06 20 ¼” hex 8059 0943 11
20A-06 20 ¼” square 8059 0943 16
25A-10 25 3/8” square 8059 0943 21
75A-10 75 3/8” square 8059 0943 26
180A-13 180 1/2” square 8059 0943 31
500A-20 500 ¾” square 8059 0943 36
750A-25 750 1” square 8059 0943 41
1400A-25 1400 1” square 8059 0943 46
3000A-38 3000 1 ½” square 8059 0943 52
5000A-38 5000 1 ½” square 8059 0943 56
OPERATIONS
Select the correct transducer having a torque capacity not less than
the maximum torque capacity of the tool used. Secure the tool
output spindle to the transducer input socket (hexagon shaft). Fit
the correct socket to the transducer output square drive (or bit in
bit-holder) and make sure it is secured.
Connect the transducer to the measuring instrument with the proper
cable. If you use an ACTA instrument the calibration data will be
loaded automatically and no manual entering of the value is
required.
If you use another measuring instrument the transducer shunt
calibration value and the angle pulses must be entered manually.
The shunt calibration value is marked on the transducer, the bridge
impedance is 350 Ohm and a 43,575 Ohm resistor is necessary.
Make sure to align the tool/transducer, to avoid any influence from
side forces which may affect the measurement.
If a tool is tested with a reaction bar the effective radial position of
the reaction bar point should not be less than a certain value (see
the next table and figure); not observing this requirement and to
exceed the maximum torque rating may cause a permanent damage
to the transducer.
Pin Function
A Excitation +
B Excitation –
C Signal +
D Signal –
E –
F Angle encoder cw trail (for versions with angle)
G Eeprom Clock
H Angle encoder cw lead (for versions with angle)
J Eeprom data
K-L-
M-N –
P Ground (angle and eeprom)
R + 5V for angle reading (for versions with angle)
S –
T + 8/12V eeprom power supply
U-V –

IRTT-B User Guide
9836 4436 01 Revision 2010-01 5 (8)
Dimensions:
Weight (grams)
Model Drive A B C D E F G H J with angle without angle
1A-I06 hex 115,8 31 71,9 39,2 56 20,6 25,5 15,5 59 230 -
2A-I06 hex 115,8 31 71,9 39,2 56 20,6 25,5 15,5 59 230 -
5A-I06 hex 115,8 31 71,9 39,2 56 20,6 25,5 15,5 59 235 215
5A-06 square 71,5 31 71,9 9,5 56 6 7,3 15,5 59 220 -
20A-I06 hex 115,8 31 71,9 39,2 56 20,6 25,5 15,5 59 240 220
20A-06 square 71,5 31 71,9 9,5 56 6 7,3 15,5 59 240 225
25A-10 square 76,1 31 71,9 12,1 56 8 11 15,5 59 260 245
75A-10 square 76,1 31 71,9 12,1 56 8 11 15,5 59 260 245
180A-13 square 87 42 82,9 17 58 12 15,2 21 70 460 410
500A-20 square 106 52 92,9 25 66 15 23 26 80 950 890
750A-25 square 125 65 104,9 30 73 22 28 32,5 92 1370 1320
1400A-25 square 125 65 104,9 30 73 22 28 32,5 92 1420 1380
3000A-38 square 165 106 148,5 41,8 88 35,2 39,2 53 136 4550 4500
5000A-38 square 165 106 148,5 41,8 88 35,2 39,2 53 136 4420 4370
WARNING
When using the IRTT-B with a 90° bent reaction bar there is a risk of large side forces, which may damage the transducer, the min. radial
position is measurement R according to the following figure. The ideal solution is to use a straight reaction bar in 90° angle to the IRTT-B.
Maximum RPM Angle Reading Models
Hex. and
square
drive size
Torque
rating
Nm
Continu
ous
Intermi_
ttent
Min. radial
position 1
R
mm
Pulses per Rev. /
Resolution
Degrees
Max. RPM
Angle
1/4" hex. 1 5000 5000 50 180 / 0.5 2500
1/4" hex. 2 5000 11000 50 180 / 0.5 2500
1/4" hex. 5 5000 11000 50 180 / 0.5 2500
1/4" sq. 5 5000 11000 100 180 / 0.5 2500
1/4" hex. 20 5000 11000 100 180 / 0.5 2500
1/4" sq. 20 5000 11000 100 180 / 0.5 2500
3/8" sq. 25 2500 10000 50 180 / 0.5 2500
3/8" sq. 75 2500 10000 150 180 / 0.5 2500
1/2" sq. 180 2500 7600 180 180 / 0.5 2500
3/4" sq. 500 2000 5000 240 180 / 0.5 2000
1" sq. 750 1000 4400 190 180 / 0.5 1000
1" sq. 1400 1000 4400 350 180 / 0.5 1000
1 ½" sq. 3000 1000 4400 600 360/0.25 4400
1 ½" sq 5000 1000 4400 600 360/0.25 4400
Square Drive
Hexagon Drive

IRTT-B User Guide
6 (8) 9836 4436 01 Revision 2010-01
SCHEDULED MAINTENANCE
There are no critical maintenance activities required by the transducer.
Annual calibration is still required.
TROUBLESHOOTING GUIDE
Here is a quick troubleshooting guide for the IRTT-B Transducer.
If a problem appears, before taking any action (replacing parts or contacting the customer support) be sure that the transducer is being used in the
proper way and connected to a proper and working measurement unit; improper operations can cause defects or incorrect readings even if the
transducer is good.
Note: there are no spare parts available for the IRTT-B transducer.
INFORMATION ACCORDING TO WEEE DIRECTIVE
Here the instruction about how to dismiss the wasted items:
Problem Cause Solution
Shaft stiff to turn Bearing defect due to:
a) Torsional or flexural vibration
b) High axial or radial loads
c) Worn bearings
d) Bent shaft
Send unit for repair/replacement
Zero shift less than 2% Torsional vibration
Torsional shock
The zero reading can be readjusted at the display
Zero shift between approx. 2 and 5% of
full scale
Torquemeter has been overloaded
Torsional vibration
Torsional shock
The zero reading can be readjusted once at the display
Hysteresis between clockwise and
counterclockwise torque
Torquemeter overloaded by high
alternating loads or torsional vibration
Send unit for repair/replacement
Electronic board
Connector
Brushes
1. Remove the cover
Separate the electronic parts:
2. Connector
3. Electronic board
4. Brushes

9836 4436 01
2010-01
www.atlascopco.com