Measurement and Calibration - Glossary of Terms Modes of

Measurement and Calibration - Glossary of Terms Modes of
www.norbar.com
Measurement and Calibration - Glossary of Terms
The following information may help in selecting the appropriate measuring device for your needs.
Accuracy
The precision of the instrument which can be reported in three ways.
1. By quoting the guaranteed tolerance as a percentage of the reading or indicated value, (eg. “0.5% of Reading”).
2. By quoting the guaranteed tolerance as a percentage of the full scale value of the instrument, (eg. 0.1% FS or 0.1% FSD).
3. By quoting a ‘class’ of device in accordance with BS7882:2008 “Method for calibration and
classification of torque measuring devices”. (See page 90).
Modes of Operation
First Peak of Torque - when a “click type” torque wrench signals that the set torque
has been achieved, the applied torque will momentarily drop before climbing again. Generally
the fastener stops rotating at point 1, and from a standstill, the breakaway torque to achieve
further rotation of the fastener will be higher than point 3b. Only if the operator is very
insensitive to the break point will the final tightening effort be incorrect.
“First Peak of Torque” mode will detect the break point of the torque wrench, not the
highest torque applied.
Peak Torque - this mode of operation will record the highest torque applied. In the
case of a “click type” torque wrench this may be higher than the actual break point if the
wrench continues to be loaded beyond the break.
1 = Torque wrench activates
2 = ‘Click’ heard
3a = Wrench released quickly
3b = Wrench released slowly
Consequently, Peak Torque is more useful for calibrating devices without a break signal such as dial or electronic wrenches.
Track - this mode has no memory at all.When the load is removed the display will return to zero.
Track is used for calibrating the device itself or for monitoring a fluctuating torque.
Resolution
The smallest measurement interval that can be determined on the indicating device.
This applies to analogue and digital devices.
Number of Digits
Digital displays are described as having a certain number of ‘digits’ or ‘active digits’.
Half digits can be used to increase the resolution of a device without the expense of going to an additional full active digit.
Eg 1. 1000 N.m displayed on a 4 digit system would read 1000 (resolution = 1 N.m).
Eg 2. 1000 N.m displayed on a 41⁄2 digit system would read 1000.0 (resolution = 0.1 N.m).
Active digits change as the torque changes. Non active digits only assist in showing the magnitude of the torque.
For example, 10,000 N.m requires 5 digits to display it’s magnitude.
Eg 3. With 4 active digits (and 1 passive digit), 10,000 N.m would change in steps of 10 N.m.
Eg 4. With 41⁄2 or 5 active digits, 10,000 N.m would change in steps of 1 N.m.
Signal Processing
Electronic Circuitry falls broadly into two types, analogue and digital, with most electronic measurement systems
comprising a mixture of the two.There are also whole analogue electronic systems, but these are rare in torque
measurement. Most systems start with an analogue signal.The point at which the signal is converted defines the type.
Analogue systems – one in which the signal is processed before being converted to digital.
Digital systems – the original analogue signal is converted to digital before processing.
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Measurement and Calibration
TruCheck
Simple, Cost Effective Torque Wrench Testing
The importance of keeping your torque tools in peak calibration condition is well
established. Many businesses achieve this by using a third party calibration service.
However, how much more convenient would it be to perform calibration checks inhouse? Wrenches could be checked more frequently, immediately if a problem is
suspected, and wrenches would not need to leave site unnecessarily.
The main reasons that more companies do not perform calibration checks on their own
wrenches are the cost of testers and fears over the complexity of the testing
equipment. Norbar’s new ‘TruCheck’ torque wrench testers aim to sweep aside these
concerns.They are very cost effective being significantly cheaper than most similar
products on the market and the basic version of the TruCheck particularly is very simple
to use.
The product comes in two versions: there is a basic version, simply called ‘TruCheck’
and a version with greater functionality called ‘TruCheck Plus’.
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TruCheck
One of the concerns in putting a torque tester into an environment where people
are not calibration specialists is that incorrect selections will be made with the
potential for incorrect tool setting and consequently tool failure. Norbar’s solution
is to remove all choices from the operator. The TruCheck is for click type torque
wrenches and comes with a single measurement unit (N.m or lbf.ft).There is only
one button on the device and that is to zero the display. Operation is simplicity
itself and it is virtually impossible to go wrong!
TruCheck 10 - 350 N.m
TruCheck
Model
Part No.
Range
TruCheck 350 N.m
43221
10 - 350 N.m
TruCheck 250 lbf.ft
43226
10 - 250 lbf.ft
TruCheck 1000 N.m
43230
100 - 1000 N.m
TruCheck 750 lbf.ft
43237
75 - 750 lbf.ft
Technical Specification
Accuracy: +/-1%, +/-1 digit over the stated operating range.
Display: 4 digit, 7 segment LED.
TruCheck 350 N.m and 250 lbf.ft
Drive Size: 1/2” female square
Power Tool Test Fixture For TruCheck,
1000 N.m and 750 lbf.ft
Dimensions in mm: 145.5(d) x 150(w) x 85(h)
(Part Number 50757)
Weight: 3.2 kg shipping
This Power Tool Test Fixture incorporates a Joint Simulation
Rundown Assembly, base plate, reaction plate, drive adaptors
and a reaction adaptor. This, when used in conjunction with
a TruCheck Plus 1000, provides a cost effective means of
testing Norbar’s PTM-52, PTM-72, PTME and PT72 tools up
to 1000 N.m (750 lbf.ft). The Joint Simulation element (part
number 50758) can be purchased separately for customers
wishing to design their own reaction fixtures. This joint
simulator is not recommended for use with impact or
impulse type wrenches.
TruCheck 1000 N.m and 750 lbf.ft
Drive Size: 27mm male hexagon supplied with 3/4” square drive socket
Dimensions in mm: 145.5(d) x 175(w) x 85(h)
Weight: 4.8 kg shipping
Materials/Finish: Self coloured rigid polypropylene case.
Stainless steel transducer shaft and zinc plated steel base plate.
66
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Measurement and Calibration
TruCheck Plus
Accepting that some customers require more flexibility than the basic TruCheck
provides, the ‘Plus’ adds a comprehensive range of features.With three modes of
operation the TruCheck Plus is suitable for click wrenches, dial and electronic
wrenches and in ‘Track’ mode will continuously monitor the torque signal.
There are three torque units - N.m, lbf.ft and lbf.in.
TruCheck Plus also has a user selectable ‘limit’ feature.The operator sets the target
torque and tolerance and the instrument will calculate whether the reading is
within tolerance and indicate the result by illuminating one of three coloured LEDs:
yellow = low, green = OK, red = high.
Finally,TruCheck Plus has an RS-232 serial data output and comes complete with an
RS-232 lead.The reading, measurement unit and limit status (Low, OK or High) are
output via RS-232.
TruCheck Plus 100 - 1000 N.m
3/4” socket is supplied
TruCheck Plus
Range
Model
Part No.
TruCheck Plus 350 N.m
43222
10 - 350 N.m
TruCheck Plus 1000 N.m
43231
100 - 1000 N.m
Calibration Options
TruCheck instruments are supplied as standard with a traceable calibration certificate for the
clockwise direction. As an option, UKAS accredited calibration certificates from Norbar’s
laboratory can be supplied, either clockwise only or clockwise and counter clockwise.
Part No.
Description
TCACC.CW
UKAS accredited calibration clockwise
TCACC.CW+CCW
UKAS accredited calibration clockwise and counter clockwise
Note: UKAS accredited calibration is from 5% to 100% of full scale for TruCheck
350 N.m and 250 lbf.ft (part numbers 43221, 43226 and 43222) and 10% to 100%
for TruCheck 1000 N.m and 750 lbf.ft (part numbers 43230, 43231 and 43237).
67
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Professional Torque Tester (Pro-Test) – Series 2
The accuracy, ease of use and price competitiveness of the original Pro-Test instrument has made it
the choice of many industrial, military and automotive customers worldwide. The ‘Series 2’ adds
some unique features designed to make life easier and reduce the opportunities for error when
calibrating torque wrenches.
New Features
• Pictorial display panel for easy mode selection.
• Limit detection with low, pass and high indication both on the screen, and by coloured LEDs.
Limit status is also output via RS-232-C. Target torque and tolerance can be set by the operator.
• ISO 6789 calibration mode automatically calculates the torque wrench calibration points and
tolerance. All the user has to do is set the maximum calibration point for the wrench – the
instrument does the rest for you!
• Memory function displays the 5 previous readings taken by the operator. For operators creating
manual calibration certificates, there is no need to stop and write after each reading, hence speeding
the process.
• Carry case is now a standard feature.
• RS-232 cable included as standard.
Pro-Test display and transducer in carry case.
Flexible mounting options of Pro-Test on Bracket, Part No. 62198
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Measurement and Calibration
Professional Torque Tester (Pro-Test) – Series 2
• Guaranteed classification to BS7882:2008, Class 1 or better over the primary calibration
range (20% to 100% of full scale), Class 2 or better over the secondary calibration range
(lowest calibrated value to 20% of full scale). Class 1 equates to ±0.5% of reading.
• Three transducers are available in the range, up to 1500 N.m (1100 lbf.ft).
• Three essential operating modes allow the Pro-Test to be used with all torque wrench
types: ‘Track’ displays the live value, ‘Peak Memory’ records the highest value and ‘First
Peak Memory’ records the first peak of torque (for click type torque wrenches). Both
memory modes can be used with manual or automatic reset.
• Large back lit display is easily visible from a distance and in poor light.
• All common units of torque measurement are included.
• User can select the language they wish to work in (most European languages are
included).
• Transducer can be mounted for torque wrench operation in the horizontal or
vertical plane.
• RS-232-C is included for the output of reading to a printer, PC, data capture unit, SPC
software etc.
• Optional mounting plate, Part No. 62198 gives greater flexibility of mounting options.
• All user settable parameters are menu selectable from the front panel.
• As standard, all transducers are calibrated in a clockwise direction. For additional anti
clockwise direction order Part No. PROTEST.CCW.
Measure Screen
Limit type selection
Pro-Test
Part
No.
Model
Operating
Range
Calibrated
Range
System
Resolution
Input Hex
A/F
Square Drive
Adaptor
N.m
N.m
N.m
mm
in
Pro-Test 60
43218
0 - 60
1.2 – 60
0.001
10
1
Pro-Test 400
43219
0 – 400
8 – 400
0.01
22
3
⁄4 + 3⁄8 + 1⁄2
Pro-Test 1500
43220
0 – 1500
30 – 1500
0.1
36
⁄8 + 1⁄2 + 3⁄4
⁄4
3
Pro-Test Ancillaries
Part No.
Description
60253
12V DC Power Supply*
62198
Mounting Plate
PROTEST.CCW
Pro-Test Counter Clockwise Calibration
* Option only necessary when powering from a 12V DC vehicle battery.
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Torque Screwdriver Tester (TST) - Series 2
The TST combines simplicity with up to date technology to provide a high quality
instrument for the testing and calibration of low capacity torque tools.
Featuring an internal transducer complete with Joint Simulation Rundown Assembly,
the TST is available in 3 torque ranges, 0.04 to 2 N.m, 0.5 to 10 N.m and 1.25 to 25
N.m. Class 1 system accuracy over its Primary range (±0.5% of reading from 20%
to 100% of full scale).
What makes the TST genuinely versatile is the interface for an external transducer.
This interface, accessed by a 2 way switch in the TST, allows the connection of any
transducer from Norbar’s “SMART” range and most mV/V calibrated transducers
from Norbar or other manufacturers.
Norbar is UKAS accredited for the calibration of electrical torque indicator
displays and the TST is supplied with a calibration certificate.This ensures
that each element of the system is fully traceable and interchangeable.
The TST is also supplied with a UKAS torque calibration certificate
for the complete system i.e. display and internal transducer.
Back Panel
TST in standard carry case,
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Take Pride - Torque Norbar
Measurement and Calibration
Torque Screwdriver Tester (TST) - Series 2
•
•
•
•
•
•
•
•
•
•
•
•
•
Pictorial display panel for easy mode selection.
Limit detection with low, pass and fail indication. Up to 12 target values can be set.
Digital limit state output for control of external tools.
Operation from fast charge internal battery pack (maximum time of 3 hours 20
minutes for full charge) or a.c. supply (90 to 264 Volts).
RS-232-C serial data interface for connection to a printer or PC. Continuous RS
232 output when used in track mode (up to 11 readings per sec).
Pulse count feature in Impulse mode and Clutch Tool mode.
“SMART” intelligence for transducer recognition.
Memory for calibration details of 20 non-“SMART” mV/V calibrated transducers.
Analogue output allows the instrument to be used as part of a process control
system for performance analysis.
User selectable frequency response for each mode of operation.
All user selectable features have password protection.The instrument can be issued
to users with only the required modes of operation and units of measure enabled.
This feature can virtually eliminate operator induced errors.
Supplied in carry case.
All common measurement units for torque are included plus users can configure
their own units to interface with non torque transducers.
TST
Model
Range
Part No.
N.m
lbf.in
TST 2
TST 10
43212
43213
0.04-2
0.5-10
0.4-20
5-100
TST 25
43214
1.25-25
12.5-250
TST Ancillaries
Part No.
Description
60216.200
TST to 10 Way lead, for Norbar Rotary Transducers
60217.200
TST to 6 Way lead, for Norbar Static & Annular Transducers
TST.CCW
TST Counter Clockwise Calibration
50539*
Joint Simulation Rundown Assembly 2 N.m
50540*
Joint Simulation Rundown Assembly 10 N.m
50541*
Joint Simulation Rundown Assembly 25 N.m
*The TST comes with a Joint Simulation Rundown Assembly as standard.
These Part No.s are for replacement or additional fixtures only.
Limit Setting Screen
Accuracy when used with external transducer port:
Input Voltage
Equivalent torque
Accuracy
Calibration uncertainty*
@0.5 mV
5% of full scale
±0.1% of reading
±0.13%
@1.0 mV
10% of full scale
±0.05% of reading
±0.08%
@2.0 to 18.9 mV 20% to 110% full scale ±0.05% of reading
±0.06%
Measure Screen
*Using a coverage factor of k=2, to give a confidence level of approximately 95%.
Resolution:
Weight:
Dimensions:
5 digits for all Norbar transducers.
2.2 kg (4.8 lb).
160 mm deep x 288 mm wide x 72 mm high.
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Torque Tool Tester (TTT) - Series 3
The TTT shares all of the extensive features of the TST except that it has no internal
transducer. Instead, the TTT offers not one but three external transducer interfaces allowing
any three transducers to be simultaneously connected. Selection between the transducers is
made by a rotary switch at the back of the instrument case.
Any transducer from Norbar’s “SMART” range and most mV/V calibrated transducers from
Norbar or other manufacturers can be connected to the TTT. The “SMART” feature means
that once a transducer has been connected, the instrument will automatically recognise
calibration details such as mV/V output, serial number and capacity.
Norbar is UKAS accredited for the calibration of electrical torque indicator
displays and the TTT is supplied with a calibration certificate.This ensures
that each element of the system is fully traceable and interchangeable.
Back panel
TTT in standard carry case.
STB1000 Transducer also shown.
72
Take Pride - Torque Norbar
Measurement and Calibration
Torque Tool Tester (TTT) - Series 3
•
•
•
•
•
•
•
•
•
•
•
•
•
Pictorial display panel for easy mode selection.
Limit detection with low, pass and fail indication. Up to 12 target values can be set.
Digital limit state output for control of external tools.
Operation from fast charge internal battery pack (maximum time of 3 hours 20
minutes for full charge) or a.c. supply (90 to 264 Volts).
RS-232-C serial data interface for connection to a printer or PC. Continuous RS
232 output when used in track mode (up to 11 readings per sec).
Pulse count feature in Impulse mode and Clutch Tool mode.
“SMART” intelligence for transducer recognition.
Memory for calibration details of 20 non-“SMART” mV/V calibrated transducers.
Analogue output allows the instrument to be used as part of a process control
system for performance analysis.
User selectable frequency response for each mode of operation.
All user selectable features have password protection.The instrument can be
issued to users with only the required modes of operation and units of measure
enabled.This feature can virtually eliminate operator induced errors.
Supplied in carry case.
All common measurement units for torque are included plus users can configures
their own units to interface with non torque transducers.
TTT
Part No.
Description
43228
Torque Tool Tester
TTT Ancillaries
Part No.
Description
60216.200
TTT to 10 Way lead, for Norbar Rotary Transducers
60217.200
TTT to 6 Way lead, for Norbar Static & Annular Transducers
TTT.CCW
TTT Counter Clockwise Calibration
Details of connected transducer displayed by pressing # key.
Accuracy:
Input Voltage
Equivalent torque
Accuracy
Calibration uncertainty*
@0.5 mV
5% of full scale
±0.1% of reading
±0.13%
@1.0 mV
10% of full scale
±0.05% of reading
±0.08%
@2.0 to 18.9 mV 20% to 110% full scale ±0.05% of reading
±0.06%
*Using a coverage factor of k=2, to give a confidence level of approximately 95%.
Resolution:
Weight:
Dimensions:
Language setting
5 digits for all Norbar transducers.
1 Kg (2.2 lb).
150 mm high x 200 mm wide x 180 mm deep.
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Flange Mounted Transducers - FMT
Flange Mounted Transducers incorporate mounting points for securely fixing the transducer to the
working surface.The transducer lead is also included and is fitted with a high quality Lemo® connector,
suitable for attachment to TST and TTT instruments.
• Classified to BS7882:2008, typically better than Class 1 for the primary classification range
(±0.5% of reading from 20% to 100% of full scale).
• “SMART” – TST and TTT instruments will automatically recognise calibration details.
• Joint Simulation Rundown Assembly is included on transducers up to 150 N.m (100 lbf.ft) allowing joint
simulation for power tool testing.
• Supplied with UKAS calibration certificate.
• Transducers are supplied with precision made square drive adaptors.
1500 N.m Transducer
S.I Calibrated Transducers
Capacity
Part No.
Range
Square Drives
Supplied - in
2 N.m
10 N.m
25 N.m
150 N.m
400 N.m
50671.xxx
50672.xxx
50673.xxx
50674.xxx
50675.xxx
0.04-2 N.m
0.5-10 N.m
1.25-25N.m
7.5-150 N.m
20-400 N.m
⁄4
⁄4
1
⁄4 + 3⁄8
3
⁄8 + 1⁄2
1
⁄2 + 3⁄4
1500 N.m
50676.xxx
30-1500 N.m
1
1
⁄2 + ⁄4 + 1
1
3
Part No.
Imperial Calibrated Transducers
Capacity
Part No.
Range
20 lbf.in
100 lbf.in
250 lbf.in
100 lbf.ft
250 lbf.ft
50677.xxx
50678.xxx
50679.xxx
50680.xxx
50681.xxx
0.4-20 lbf.in
5-100 lbf.in
12.5-250 lbf.in
5-100 lbf.ft
12.5-250 lbf.ft
1000 lbf.ft
50682.xxx
20-1000 lbf.ft
Square Drives
Supplied - in
⁄4
1
⁄4
1
⁄4 + 3⁄8
3
⁄8 + 1⁄2
1
⁄2 + 3⁄4
Take Pride - Torque Norbar
50539
1
⁄2 + 3⁄4 + 1
1
Select part no. suffix .LOG if the transducer is to be connected to TST or TTT (example: 50671.LOG). For
connection to a non Norbar instrument or when a mV/V certificate is required, select .IND.
74
Joint Simulation Rundown Assemblies
for Flange Mounted Transducers
50540
50541
50692
Range
0.04 – 2 N.m
0.4 – 20 lbf.in
0.5 – 10 N.m
5 – 100 lbf.in
1.25 – 25 N.m
12.5 – 250 lbf.in
7.5 – 150 N.m
5 – 100 lbf.ft
A/F Size of
Hex Screws
⁄4”
1
⁄4”
1
⁄4”
1
14 mm
The above Joint Simulation Rundown Assemblies are supplied with
the Flange Mounted Transducer as standard, but can also be ordered
separately.
Measurement and Calibration
2 N.m Transducer
150 N.m Transducer
Large Mounting Bracket, Part No.
62220 suitable for 150 N.m to
1500 N.m Transducers
Small Mounting Bracket, Part No.
62221 suitable for 2 N.m to
400 N.m Transducers
“SMART” Torque Block - STB
• Classified to BS7882:2008, typically better than Class 1 for the primary classification range
(±0.5% of reading from 20% to 100% of full scale).
• “SMART” – TST and TTT instruments will automatically recognise calibration details.
• Supplied with UKAS accredited calibration certificate.
There are two models, STB1000 and STB3000.Transducer Lead is incorporated and is terminated in a Lemo®
connector suitable for the TST and TTT.
S.I. Calibrated Transducers
Model
Part No.
Range
Square Drives - in
STB1000
50683.xxx
20-1000 N.m
1
STB3000
50684.xxx
150-3000 N.m
3
⁄2 + 3⁄4
⁄4 + 1
Select part no. suffix .LOG if the transducer is to be connected to TST and TTT
(example: .LOG). For connection to a non Norbar instrument or when a mV/V certificate is required, select .IND.
Joint Simulation Rundown Assemblies
for STB1000
Part No.
50693
50694
Range
10 – 140 N.m
10 – 100 lbf.ft
100 – 700 N.m
70 – 500 lbf.ft
A/F Size of Hex
Screws - mm
12
19
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Static Torque Transducer
The accuracy and quality of the Norbar Static Torque Transducers has made them the first choice of
many calibration laboratories throughout the world.
• Up to 5000 N.m (5000 lbf.ft) classified to BS7882:2008, typically better than Class 1 for the primary
classification range (±0.5% of reading from 20% to 100% of full scale).
• Robust, heat treated, alloy steel torsion shaft design.
• Designed to ignore non torsional forces.
• Operates in clockwise and anti-clockwise directions.
• Calibration up to 5000 N.m (lbf.ft) with a UKAS accredited calibration certificate, above 5000 N.m
(lbf.ft) with a traceable
calibration certificate.
• Calibrated in clockwise direction as standard. Anti-clockwise calibration provided on request.
• ‘SMART’ transducers have built in memory circuit which contains essential information about the
transducer.This information can be read by Norbar’s TST and TTT instruments meaning that when the
transducer is connected, it is immediately recognised and ready for use. When ordering for a TST or TTT,
use part no. suffix ‘.LOG’ (eg. 50659.LOG) if you require a torque units calibration certificate.
• ‘SMART’ transducers can also be used with many instruments not of Norbar manufacture. However,
these will operate as normal ratio calibrated (mV/V) transducers – the ‘SMART’ data will not be read.
For non Norbar instruments or for when a mV/V certificate is required, use part code suffix ‘.IND’.
S.I Calibrated Transducers
Sq. Drive
Capacity
Part No.
1 N.m
2.5 N.m
50587.IND*
50588.xxx
1
5 N.m
10 N.m
50589.xxx
50590.xxx
1
25 N.m
50 N.m
50591.xxx
50592.xxx
3
100 N.m
250 N.m
50593.xxx
50594.xxx
1
250 N.m
500 N.m
50701.xxx
50596.xxx
3
1000 N.m
2500 N.m
in
A
BØ
C
⁄4 m/f
⁄4 m/f
79
79
36.5
36.5
86
86
50211
50211
⁄4 m/f
⁄4 m/f
79
79
36.5
36.5
86
86
50211
50211
⁄8 m/f
⁄8 m/f
79
79
36.5
36.5
89.5
89.5
50212
50212
⁄2 m/f
⁄2 m/f
79
79
36.5
36.5
92.8
92.8
50213
-
⁄4 m/f
⁄4 m/f
118
118
54
54
141
141
50220
50220
50597.xxx
50703.xxx
1 m/f
11⁄2 m/f
118
117
54
95
146
160
50221
50127
5000 N.m
7000 N.m
50599.xxx
50669.xxx
11⁄2 m/f
11⁄2 m/f
117
117
95
95
160
160
50127
50127
10000 N.m
25000 N.m
50600.xxx
50603.xxx
21⁄2 m/f
21⁄2 m/m
125.5
68.5
124
110
189
200
-
25000 N.m
50000 N.m
50602.IND*
50604.xxx
21⁄2 m/f
21⁄2 m/f
125.5
125.5
127
127
189
189
-
100000 N.m
50607.xxx
31⁄2 m/m
98
165
271
-
1
1
3
1
3
*Not suitable for TST and TTT.
Select part no. suffix .LOG if the transducer is to be connected to TST or TTT (example: 50588.LOG). For
connection to a non Norbar instrument or when a mV/V certificate is required, select .IND.
76
Bench Stand
Dimensions (mm)
Take Pride - Torque Norbar
Measurement and Calibration
Static Torque Transducer
3/4” Square Drive
Transducer
31/2” Square Drive
Transducer
3/8” Square Drive
Transducer
21/2” Square Drive
Transducer
Imperial Calibrated Transducers
Part No.
100 ozf.in
1000 ozf.in
50609. IND*
50616.xxx
1
10 lbf.in
50610. IND*
1
Bench Stand
Dimensions (mm)
Sq. Drive
Capacity
in
A
BØ
C
⁄4 m/f
⁄4 m/f
79
79
36.5
36.5
86
86
50211
50211
⁄4 m/f
79
36.5
86
50211
⁄4 m/f
79
36.5
86
50211
⁄4 m/f
1
⁄4 m/f
79
79
36.5
36.5
86
86
50211
50211
⁄8 m/f
⁄8 m/f
79
79
36.5
36.5
89.5
89.5
50212
50212
⁄2 m/f
⁄4 m/f
79
79
36.5
36.5
92.8
86
50213
50211
⁄4 m/f
⁄4 m/f
79
79
36.5
36.5
86
86
50211
50211
⁄8
⁄8
1
⁄2
1
⁄2
m/f
m/f
m/f
m/f
79
79
79
79
36.5
36.5
36.5
36.5
89.5
89.5
92.8
92.8
50212
50212
50213
-
⁄4 m/f
⁄4 m/f
118
118
54
54
141
141
50220
50220
118
117
54
95
146
160
50221
50127
50127
1
25 lbf.in
50612.xxx
1
50 lbf.in
100 lbf.in
50614.xxx
50617.xxx
1
250 lbf.in
500 lbf.in
50619.xxx
50621.xxx
3
1000 lbf.in
1 lbf.ft
50623.xxx
50611.xxx
1
2.5 lbf.ft
5 lbf.ft
50613.xxx
50615.xxx
1
25 lbf.ft
50 lbf.ft
100 lbf.ft
250 lbf.ft
50620.xxx
50622.xxx
50624.xxx
50625.xxx
3
250 lbf.ft
500 lbf.ft
50702.xxx
50627.xxx
3
1000 lbf.ft
2500 lbf.ft
50628.xxx
50704.xxx
1 m/f
11⁄2 m/f
5000 lbf.ft
50630.xxx
11⁄2 m/f
117
95
160
10000 lbf.ft
50632.xxx
21⁄2 m/f
125.5
124
189
-
25000 lbf.ft
25000 lbf.ft
50635.xxx
50634.xxx
21⁄2 m/m
21⁄2 m/f
68.5
125.5
110
127
200
189
-
50000 lbf.ft
100000 lbf.ft
50636.xxx
50637.xxx
31⁄2 m/m
31⁄2 m/m
98
98
165
165
271
271
-
3
1
1
3
3
* Not suitable for TST and TTT
Select part no. suffix .LOG if the transducer is to be connected to TST or TTT (example: 50616.LOG). For
connection to a non Norbar instrument or when a mV/V certificate is required, select .IND.
77
www.norbar.com
Bench Stands
• Ensures the correct mounting of Norbar’s Static Torque Transducers up to 5000 N.m (5000 lbf.ft).
• All bench stands (except Extra Large) are machined to accept Norbar Joint Simulation Rundown
Assemblies for power tool testing and calibration.
• For transducers in the range 1 N.m to 10 N.m (100 ozf.in to100 lbf.in),Torque Limiting Bench
stands are available.These are designed to prevent transducer over-load.
• All ‘Small Frame Size’ Bench Stands can be mounted horizontally or vertically.
D
E
A
C
B
Extra Large Bench Stand
Large Bench Stand
Transducer Bench Stands
Part No.
78
Model Description
Dimensions (mm)
Sq. Drive
in
A
B
C
D
EØ
⁄4
⁄4
1
⁄4
50
50
50
65
65
65
96
96
96
56
56
56
8.5
8.5
8.5
⁄4
⁄8
50
50
65
65
96
96
56
56
8.5
8.5
60210
60211
60212
Torque Limiting (set to 1.6 N.m)
Torque Limiting (set to 8.1 N.m)
Torque Limiting (set to 16 N.m)
1
50211
50212
Small Frame Size (10 N.m)
Small Frame Size (50 N.m)
1
50213
50220
Small Frame Size (100 N.m)
Large Frame Size (500 N.m)
1
⁄2
⁄4
50
70
65
87
96
150
56
79
8.5
13.5
50221
50127
Large Frame Size (1000 N.m)
Extra Large Size (5000 N.m)
1
11⁄2
70
105
87
280
150
152
79
240
13.5
16.5
Take Pride - Torque Norbar
1
3
3
Measurement and Calibration
Joint Simulation Rundown Assemblies
The Norbar Joint Simulation Rundown Assemblies are designed to simulate the working
conditions of screwed or bolted joints. Used in conjunction with a Norbar transducer,
bench stand and display instrument, the output of torque controlled power tools can be
measured against a range of simulated joint rates, from hard through to soft.
• Suitable for a wide variety of power tools including pneumatic/electric
screwdriver and angle wrenches with either clutch or stall
torque control.
• Models available for torques from 0.2 N.m to 500 N.m
(2 lbf.in to 500 lbf.ft).
• Spring washers and full instructions are provided
to simulate a wide range of joint types as detailed in:
BS6268:1982 , BS6544:1981, ISO5393:1981.
Joint Simulation Rundown Assemblies for Static Transducers
Part No.
Range
Socket
Bench Stand
Required
A/F Size of Hex
Screws - mm
50211
5
50211
5
50212
8
50213
10
50220
19
in
⁄4
50313
1
50251
1
50252
3
50253
1
50254
3
⁄4
⁄8
⁄2
⁄4
0.2 - 2 N.m
2 - 20 N.m
2 - 10 N.m
20 - 100 lbf.in
5 - 50 N.m
5 - 50 lbf.ft
10 - 100 N.m
10 - 100 lbf.ft
100 - 500 N.m
100 - 500 lbf.ft
Power Tool Test Fixture RD 5000
The RD5000 is designed for testing the output of powered torque
controlled tools up to 5000 lbf.ft (6800 N.m). A suitable 11⁄2” square
drive Norbar Static Transducer, Lead and Display Instrument are also
required for a complete system. For testing tools up to 1500 N.m,
please order the alternative washer stack, part number 50548.2.
RD 5000 and Ancillaries
Part No.
Description
50548
135 - 6780 N.m (100 - 5000 lbf.ft) Power Tool Test Fixture
50548.1
Nut and Bolt Kit UNC
50548.2
Washer Stack 1500 N.m
79
www.norbar.com
Rotary Torque Transducer
These transducers are designed to measure the torque output
from rotating shafts, particularly torque controlled power tools
including impulse wrenches.
• Classified to BS7882:2008, typically better than
Class 1 for the primary classification range
(±0.5% of reading from 20% to 100% of full scale).
• “SMART” – TST and TTT instruments will
automatically recognise calibration details.
• Supplied with a UKAS accredited calibration certificate.
• Designed to give excellent performance with
impulse tools.
• Optional angle measurement – contact Norbar
for details.
Rotary Torque Transducers – S.I. Calibration
Capacity
Part No.
5 N.m
20 N.m
50708.xxx
50709.xxx
20 N.m
75 N.m
50710.xxx
50711.xxx
200 N.m
250 N.m
50712.xxx
50713.xxx
500 N.m
1500 N.m
50714.xxx
50715.xxx
Sq. Drive
Maximum RPM*
Dimensions (mm)
in
Continuous
Intermittent
A
B
C
D
E
F
G
⁄4” m/f Hex
⁄4” m/f Hex
5000
5000
11000
11000
116
116
30
30
68
68
56
56
13
13
39
39
25.5
25.5
⁄4” m/f
⁄8” m/f
5000
5000
11000
11000
71.5
77
30
30
71.5
74
56
56
13
15
6
8
-
⁄2” m/f
⁄4” m/f
2500
2000
7600
5000
87
106
42
52
82.5
93.5
58
60
21
26
12
21
-
⁄4” m/f
1” m/f
2000
1000
5000
4400
106
125
52
63
93.5
104
60
64.5
26
31.5
21
29
-
1
1
1
3
1
3
3
Rotary Torque Transducers – Imperial Calibration
Capacity
Part No.
50 lbf.in
15 lbf.ft
50717.xxx
50718.xxx
15 lbf.ft
50 lbf.ft
50719.xxx
50720.xxx
150 lbf.ft
200 lbf.ft
50721.xxx
50722.xxx
300 lbf.ft
1000 lbf.ft
50723.xxx
50724.xxx
Sq. Drive
Maximum RPM*
Dimensions (mm)
in
Continuous
Intermittent
A
B
C
D
E
F
G
⁄4” m/f Hex
⁄4” m/f Hex
5000
5000
11000
11000
116
116
30
30
68
68
56
56
13
13
39
39
25.5
25.5
⁄4” m/f
⁄8” m/f
5000
5000
11000
11000
71.5
77
30
30
71.5
74
56
56
13
15
6
8
-
⁄2” m/f
⁄4” m/f
2500
2000
7600
5000
87
106
42
52
82.5
93.5
58
60
21
26
12
21
-
⁄4” m/f
1” m/f
2000
1000
5000
4400
106
125
52
63
93.5
104
60
64.5
26
31.5
21
29
-
1
1
1
3
1
3
3
* Continuous is defined as 100% usage at the given speed in either direction and intermittent as usage 10% of the total time at the given speed.
80
Take Pride - Torque Norbar
Measurement and Calibration
Annular Torque Transducer
72mm Series, Standard Series
and Small Diameter Series
These Annular transducers are designed to fit directly to Norbar gearboxes
(Pneutorque and Handtorque) and will accurately measure the torque output via a
display instrument.
Up to 5000 N.m (5000 lbf.ft) classified to BS7882:2008, typically better than Class 1
for the primary classification range (±0.5% of reading from 20% to 100% of full scale).
Transducers for Remote 72mm Series and HT-72 Multipliers
C (PCD)
Capacity
Part No.
Dimensions (mm)
A
A
B
Standard Series
Small Diameter Series
C
1000 N.m
1500 N.m
50666.xxx
50667.xxx
73
73
117
117
64.30
64.30
2000 N.m
50668.xxx
73
117
64.30
Annular Torque Transducers – S.I. Calibration
Capacity
PT72, PT4500 & HT45 type
B
Part No.
Sq. Drive
To Fit Tool
in
(HT/PT)
A
BØ
C
Dimensions (mm)
1000 N.m
1500 N.m
50638.xxx
50639.xxx
3
⁄4
1
1, 1A & 2
1,1A & 2 (All HD Type*)
61
61
108
108
99.06
99.06
2500 N.m
2500 N.m
50640.xxx
50642.xxx
1
11⁄2
5
6
79.5
79.5
119
119
99.06
99.06
3000 N.m
3500 N.m
50662.xxx
50641.xxx
1
1
HT30 & PT2700
5
82
79.5
108
119
99.06
3500 N.m
50700.xxx
11⁄2
6
79.5
119
99.06
4500 N.m
5000 N.m
50664.xxx
50643.xxx
1
11⁄2
HT45 & PT4500
7
128.5
83
85
144
125.00
6000 N.m
10000 N.m
50663.xxx
50644.xxx
11⁄2
11⁄2
HT60 & PT5500
9
88
90
120
184
152.40
20000 N.m
50000 N.m
50645.xxx
50646.xxx
21⁄2
21⁄2
11
13
97
126
212
315
195.00
290.00
100000 N.m
50647.xxx
31⁄2
14
126
315
290.00
Annular Torque Transducers – Imperial Calibration
Capacity
Part No.
Dimensions (mm)
Sq. Drive
To Fit Tool
in
(HT/PT)
A
BØ
C
1000 lbf.ft
1500 lbf.ft
50648.xxx
50649.xxx
3
⁄4
1
1, 1A & 2
1,1A & 2 (All HD Type*)
61
61
108
108
99.06
99.06
2500 lbf.ft
2500 lbf.ft
50650.xxx
50651.xxx
1
11⁄2
5
6
79.5
79.5
119
119
99.06
99.06
5000 lbf.ft
7000 lbf.ft
50652.xxx
50653.xxx
11⁄2
11⁄2
7
9
83
90
144
184
125.00
152.40
15000 lbf.ft
50000 lbf.ft
50654.xxx
50655.xxx
21⁄2
21⁄2
11
13
97
126
212
315
195.00
290.00
50000 lbf.ft
75000 lbf.ft
50656.xxx
50657.xxx
31⁄2
31⁄2
14
14
126
126
315
315
290.00
290.00
*Gearbox must be fitted with Heavy Duty (HD) final carrier.
Select part no. suffix .LOG if the transducer is to be connected to TST or TTT (example: 50638.LOG). For
connection to a non Norbar instrument or when a mV/V certificate is required, select .IND.
81
www.norbar.com
Calibration Certificate Software
This easy to use software allows data from a Norbar torque measuring instrument to be down
loaded onto a PC and formatted as a torque calibration certificate.This software can be
downloaded free of charge from Norbar’s website, www.norbar.com.
• Certificate can be customised with the laboratory’s own
name and contact details.
• The certificate format complies with the requirements of
ISO 6789.
• The software steps the operator through the calibration
process making it very simple to use.
• A certification number is automatically generated.
Certificates are filed and can be easily retrieved.
Note: Because the best way to enter data onto the
certificate is via the RS232 output of the measurement
instrument, it is strongly recommended that a Serial Data
Lead Kit, Part number 60248, is purchased, see details below.
Certificate Software Part No.: 37705
Serial Data Lead Kit
This kit enables Norbar Pro-Test,TST and TTT instruments to
connect to most PCs and RS232 printers.
Kit contains 1 of each of the following:
• 9 way ‘D’ socket to 9 way ‘D’ socket, null modem.
• 25 way ‘D’ plug to 9 way ‘D’ socket.
• 25 pin gender changer, socket to socket.
• 9 pin gender changer, plug to plug.
A Guide Book, Part No. 34256, is available on the Norbar Web Site, www.norbar.com
(select Frequently Asked Questions, FAQs). It provides comprehensive information on RS-232 data
transmission both in general and specifically how it is applied to Norbar instruments.
Lead Kit Part No.: 60248.
Transducer Leads
Part No.
Description
For use with
60152.225
ETS to 6 way transducer
Post 1994 ETS and 5 way Switch Box Model 60163
51067.225
ETS to 6 way transducer
Pre 1994 ETS and 5 Way Switch Box Model 60055
60217.200
Pro-Log,TST & TTT to 6 way transducer
All ‘Smart’ Static and Annular transducers
60216.200
Pro-Log,TST & TTT to 10 way transducer
All Rotary transducers with .IND or .LOG Part No. suffix
60223.200
Pro-Log,TST & TTT to no connector
Non Norbar transducers
60225.200
6 way transducer to no connector
Norbar 6 way connector to a non Norbar instrument
60224.200
10 way to no connector
Norbar Rotary transducer to a non Norbar instrument
The Part No. suffix indicates the length of the cable, ie. .225 is 225cm (2.25m). Other cable lengths available on
request. Please use suffix to indicate required length (preferably in whole meter increments).
82
Take Pride - Torque Norbar
Measurement and Calibration
Harsh Environment Range (HE)
Norbar has developed a range of measurement and calibration equipment that has
been tested to conform with EN 60529: 1992.
Rated to IP65/IP67 the products are aimed specifically for use in harsh
environments.
Particularly suited for use in the Offshore and Power Generation industries, the
combination of high quality components, sound design and many years field
experience allow calibration and control in previously restrictive areas.
The IP65/IP67 rating gives the product protection against dust ingression,
pressurised water jet and complete water immersion to a 1 metre depth for a 30
minute period.
5000 N.m Static Transducer
The HE range provides a fully traceable system to National calibration standards
through Norbar’s own UKAS accredited laboratory.
Key features
•
•
•
•
•
•
•
•
•
•
IP65/67 rated.
Stainless steel transducer design with ‘SMART’ intelligence.
Bi-Direction calibration for both instrument and transducer.
Class 1 accuracy over the ‘Primary’ classification range (+/-0.5% of reading
from 20 to 100% of full scale).
Battery power for use in harsh environments (mains supply for charging).
Continuous RS-232 output.
Analogue output.
Limit indication for up to 8 user defined target values.
HE transducers are available in both static and annular transducer designs.
Supplied in a water tight carry case.
Back panel. Two connector covers removed for illustration.
HE Transducers
Part No.
Description
50736.xxx
500 N.m Static Transducer 3/4” M/F sq. dr.
50737.xxx
500 lbf.ft Static Transducer 3/4” M/F sq. dr.
50738.xxx
1000 N.m Static Transducer 3/4” M/F sq. dr.
50739.xxx
1000 lbf.ft Static Transducer 3/4” M/F sq. dr.
50705.xxx
5000 N.m Static Transducer 11/2” M/F sq. dr.
50729.xxx
5000 N.m Static Tranducer 11/2” M/M sq. dr.
50706.xxx
5000 lbf.ft Static Tranducer 11/2” M/F sq. dr.
50730.xxx
5000 lbf.ft Static Tranducer 11/2” M/M sq. dr.
50726.xxx
25000 N.m Static Transducer 31/2” M/M sq. dr.
50727.xxx
40000 N.m Static Transducer 31/2” M/M sq. dr.
50744.xxx
100000 N.m Static Transducer 3 /2” M/M sq. dr.
43217
TTL-HE instrument
50743.xxx
100000 lbf.ft Static Transducer 31/2” M/M sq. dr.
60245.200
HE transducer Lead
50745.xxx
3500 N.m Annular Transducer
60250.200
HE Inst to Standard Smart Static TD Lead
50725.xxx
10000 N.m Annular Transducer
60263.200
HE Inst to Standard Smart Rotary TD Lead
1
Other Transducers available on request.
HE Instrument and Ancillaries
Part No.
Description
60266.200
HE Transducer to TTT/TST Lead
60256.200
Serial Data Lead for TTL-HE to no connector
60257.200
Ancillaries output lead for TTL-HE to no connector
83
www.norbar.com
Torque Wrench Loader
TWL1500
The design of the TWL1500 includes features that will provide an accurate and cost
effective method for the calibration or testing of torque wrenches.
Designed to suit the majority of torque wrenches available with a torque value between
1 to 1500 N.m, the TWL1500 has been manufactured using quality materials that will
provide many years of continuous, trouble-free operation.
The most significant feature of the TWL1500 is its compatibility with our wide range of
Flange Mounted, Pro-Test and Smart Torque Block transducers. All fixtures, fastener kits
and instructions are supplied allowing for complete flexibility and functionality.
With Pro-Test
TWL1500 shown with Flange Mounted Transducers,
TTT and Model 1000 torque wrench
TWL1500 Torque Wrench Loader - Part No. 60246
Transducer
Mounting
Position
Transducer
Options
Transducer
Part No.
Calibrated
Range
Torque Wrench
min
max
With FMT Range (see main photograph)
Position 1
-
FMT10
FMT25
50672.LOG
50673.LOG
0.5-10 N.m
1.25-25 N.m
145mm
145mm
1310mm
1310mm
Position 2
-
FMT150
FMT400
50674.LOG
50675.LOG
7.5-150 N.m
20-400 N.m
240mm
240mm
1405mm
1405mm
Position 3
FMT1500
50676.LOG
30-1500 N.m
336mm
1500mm
Position 1
Pro-Test 400
43219
8-400 N.m
240mm
1405mm
-
Pro-Test 1500
43220
30-1500 N.m
240mm
1405mm
Position 2
Pro-Test 1500
43220
30-1500 N.m
336mm
1500mm
With Pro-Test
With STB1000
Position 1
Position 2
Dimensions
Max Width:
753 mm
(inc. handle & Instrument tray)
STB1000
STB1000
50683.LOG
50683.LOG
20-1000 N.m
20-1000 N.m
240mm
336mm
Note 1: Min and Max torque wrench lengths are from the square drive to the centre of the handle.
Note 2: Position 1 is closest to the loading carriage and position 3 is furthest away.
84
With STB1000
Take Pride - Torque Norbar
1405mm
1500mm
Max Height:
342 mm
(excluding instrument)
Max Length:
1721 mm
Measurement and Calibration
Torque Wrench Loader
ISO 1000 and 2000
These loaders allow torque wrenches to be calibrated or tested in accordance with ISO
6789:2003, BS EN 26789:2003 and American military standard GGG-W-686.Their
function is to take full advantage of the accuracy of Norbar’s torque measuring system
by reducing operator induced variations in the calibration process.
• The high ratio, 1200:1 (ISO 2000, 1250:1) gearbox allows high torques to be applied,
whilst ensuring that the operator does not exceed the rate of increase of torque
specified in the standards.
• The design allows for easy interchange of transducers using the Norbar Static Transducer
system.
• The ISO 1000 90° facility allows performance of torque wrenches to be checked in two
planes. Many wrenches give different torque values according to their orientation in use.
• Floating reaction point minimises side loads on wrench.
• ISO 2000 reaction extension bar allows wrenches up to 2250mm to be tested.This can
be removed to save space. Wrenches up to 1045mm can be tested when the extension
bar is not fitted
• Optional Small Reaction Plate (part no. 20588) allows torque wrenches down to
100 mm in length (centre of square to centre of handle) to be tested.
• Motorised version with speed control is available for the ISO 1000. This can be
purchased as a kit to motorise an existing ISO or as a complete ISO 1000 Motorised
Torque Wrench Loader.
ISO 1000
ISO 1000 fitted with Small Reaction
Plate, Part No. 20588.
ISO 1000 and 2000 Torque Wrench Loaders
Part No.
Range
Description
Adaptors
Torque Wrench
Length (mm)
N.m
lbf.ft
min
max
1-1350
1-1350
1-1000
1-1000
200
200
1200
1200
60118
60193
ISO 1000 with 90° rotation
ISO 1000 Motorised Torque Wrench Tester
60194
Kit to motorise an ISO 1000
-
-
-
-
20502
20588
ISO 2000
Small Reaction Plate
1-2500
-
1-2000
-
200
100
2250
180
⁄4, 3⁄8, 1⁄2, 3⁄4
⁄4, 3⁄8, 1⁄2, 3⁄4
1
1
⁄4, 3⁄8,1⁄2, 3⁄4, 1, 11⁄2
-
1
Note: Min and Max torque wrench lengths are from the centre of the square drive to the centre of the handle.
ISO 2000
85
www.norbar.com
Calibration Beams and Weights Principals of Operation
Norbar’s Test Beams are designed for the static calibration of Torque Transducers.They
are ideally suited to Norbar’s transducers, but can be employed on other
manufacturer’s equipment.
Torque is generated by the application of a known force at a known radius from the
centre of rotation of the torque transducer.
The Beams are designed with square drives machined to the top limit of ISO 2725.This
minimises any play between the beam and the transducer. However, a combination of
square drive tolerances, misalignment of fittings and elastic rotation of the transducer
shaft inevitably cause the beam to rotate from the horizontal under load.
Norbar’s Radius Ended Beams are designed with a +/-8 degree usable arc within which
the calibration accuracy is unaffected.
Additionally the beams are designed to apply load on a vertical plane which cuts
through the square drive inside the transducer.This minimises bending moments on the transducer and, for safe operation,
ensures that the beam will not fall out of the transducer.
Example
0.5 m
8º
8º
8º
8º
Transducer
10N
Applied torque in this example is 5 N.m
Gravitational Effects
It is very important that the gravitational value for the Laboratory is established.The effect of not doing this could
be a variation in the force produced by the weight of perhaps 0.5% of reading.
It is therefore strongly recommended that you establish the local value of gravity (g) for your Laboratory and use
weights that have been calibrated at that gravitational constant.
Norbar will supply weights calibrated to gravitational constants specified by the customer. However, if the customer
does not specify a value for ‘g’ they will have been calibrated at an estimated gravitational constant for the
customers’ location.
Buoyancy Effects
The Norbar system uses calibrated weights to generate a downwards force.
This means that Archimedes principle applies, ie. air pressure under the weights causes an upwards force.This
reduces the effective force generated by the weights and therefore the mass must be increased to allow for this.
Under standard conditions (ie. Air density 1.2 kg/m3 and 20 degrees centigrade and working in conventional mass
terms) the increase required is by a factor of 0.015%.
Weights purchased from Norbar will already have this factor taken into account.
Weights that are calibrated to standard procedures do not have this factor taken into account because the air
buoyancy affects both sides of the mass balance and can be ignored. It is important that weights used for torque
transducer calibration are adjusted for air buoyancy.
It should also be noted that the double ended beam design employed by Norbar means that each half of the beam is
balanced with regard to buoyancy of the beam.This is a significant advantage over
single-arm counterbalanced systems.
86
Take Pride - Torque Norbar
Measurement and Calibration
Calibration Disc
Designed to remove potential sources of measurement error, these Discs can be used to calibrate Norbar torque
transducers, and torque transducers from other manufacturers (where design permits), as well as mechanical test
devices. A UKAS accredited certificate for the measurement of torque radius is supplied with each beam.
• The < 0.04% uncertainty of applied torque achievable with this disc allows calibration to
the high classes of accuracy specified by BS7882:2008.
• Machined to ±0.03% from aircraft alloys.
• Clockwise and counter-clockwise operation.
• Capable of SI or Imperial calibrations.
• Compatible with male and female 1/4” square transducer drives.
• No bearings to cause energy loss during loading.
• Brass weights with an accuracy better than ±0.01% are available in five sets to achieve
a variety of calibration ranges.
• Special weight sets can be specified up to a maximum torque of 2.5N.m.
NOTE:
A temperature controlled environment is essential for use of these beams.The selection of weights will be
influenced by gravitational constant and air buoyancy values at the proposed laboratory site. See page 86.
Calibration Disc shown with
more than one weight set.
Calibration Discs – S.I and Imperial
Range
Disc Part
No.
Radius to
Centre Line
of Hanger
Weight Set
Part No.s
Weight Set
Comprising
Diameter of
Weight
Hanger Rod
Drive
Square A/F
in
Minimum
Maximum
0.05 N.m
0.10 N.m
0.50 N.m
1.00 N.m
21400
21400
100 mm
100 mm
21452
21450
10 x 0.5 N
10 x 1.0 N
4 mm
4 mm
1
0.25 N.m
5 ozf.in
10 ozf.in
2.5 N.m
50 ozf.in
100 ozf.in
21400
21400
21400
100 mm
100 mm
100 mm
21479
21455
21453
10 x 2.5 N
10 x 1.27 ozf
10 x 2.54 ozf
4 mm
4 mm
4 mm
1
16 ozf.in
(1 lbf.in)
160 ozf.in
(10 lbf.in)
21400
100 mm
21451
10 x 4.064 ozf
4 mm
1
⁄4
⁄4
1
⁄4
⁄4
1
⁄4
1
⁄4
87
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Radius Ended Beam
Designed to remove potential sources of measurement error, these beams can be used to calibrate Norbar torque transducers,
and torque transducers from other manufacturers (where design permits), as well as mechanical test devices. A UKAS accredited
certificate for the measurement of torque radius is supplied with each beam.
• The < 0.02% uncertainty of applied torque achievable with these beams allows
calibration to the highest class of accuracy specified by BS7882:2008.
•
•
•
•
•
•
•
•
Machined to ±0.01% (100 microns per meter) from aircraft alloys.
Clockwise and counter-clockwise operation.
All have interchangeable square drive to increase flexibility of use.
Torque radius maintained throughout ±8 degrees of rotation from horizontal.
No bearings to cause energy loss during loading.
Balanced to maximise energy transfer to transducer during loading.
Loading point offset to reduce bending moments on the transducer.
High torque radius accuracy allows use of cast iron weights rather than stainless steel.
Weight accuracy is required to be equal to or better than ±0.01%.
NOTE:
A temperature controlled environment is essential for use of these beams.The selection of weights will be influenced
by gravitational constant and air buoyancy values at the proposed laboratory site. See page 86.
Radius Ended Beams - S.I. Calibration
Range
Beam Part
No.
Radius to
Centre Line
of Hanger
Weight Set
Part No.s
Weight Set
Comprising
Diameter of
Weight
Hanger Rod
Drive
Square A/F
(in)
Minimum
Maximum
0.5 N.m
1 N.m
5.0 N.m
10 N.m
21420
21420
250 mm
250 mm
21476
21454
10 x 2 N
10 x 4 N
9.5 mm
9.5 mm
5 N.m
50 N.m
21420
250 mm
21458
10 x 20 N
9.5 mm
1
5 N.m
50 N.m
21421
500 mm
21477
10 x 10 N
9.5 mm
3
10 N.m
100 N.m
21421
500 mm
21458
10 x 20 N
9.5 mm
1
5 N.m
250 N.m
21427
500 mm
21459
1 x 10 N
9.5 mm
1
5 N.m
500 N.m
21427
500 mm
21460
9.5 mm
1
10 N.m
500 N.m
21428
1000 mm
21459
10 N.m
1000 N.m
21428
1000 mm
21460
1 x 10 N
10 N.m
1500 N.m
21428
1000 mm
21483
14 x 100 N
⁄4, 3⁄8
⁄4, 3⁄8
1
1
⁄4, 3⁄8
⁄8, 1⁄2
⁄4, 3⁄8
⁄2, 3⁄4
10 x 50 N
1 x 10 N
⁄2, 3⁄4
10 x 100 N
1 x 10 N
9.5 mm
1
⁄2, 3⁄4, 1
9.5 mm
1
9.5 mm
1
10 x 50 N
⁄2, 3⁄4, 1
10 x 100 N
⁄2, 3⁄4, 1
1 x 50 N
2 x 20 N
1 x 10 N
Radius Ended Beams - Imperial Calibration
Range
88
Beam Part
No.
Radius to
Centre Line
of Hanger
Weight Set
Part No.s
Weight Set
Comprising
Diameter of
Weight
Hanger Rod
Drive
Square A/F
(in)
Minimum
Maximum
10 lbf.in
50 lbf.in
100 lbf.in
500 lbf.in
21423
21423
10”
10”
21465
21466
10 x 1 lbf
10 x 5 lbf
9.5 mm
9.5 mm
1
10 lbf.ft
100 lbf.ft
21424
12”
21467
10 x 10 lbf
9.5 mm
3
50 lbf.ft
500 lbf.ft
21425
24”
21468
10 x 25 lbf
9.5 mm
1
100 lbf.ft
1000 lbf.ft
21426
48”
21468
10 x 25 lbf
9.5 mm
3
Take Pride - Torque Norbar
⁄4, 3⁄8
⁄4, 3⁄8
1
⁄8, 1⁄2
⁄2, 3⁄4
⁄4, 1
Measurement and Calibration
5000 lbf.ft Calibration Beam
Designed to remove potential sources of measurement error, these beams can be used to calibrate Norbar
torque transducers, and torque transducers from other manufacturers (where design permits), as well as
mechanical test devices. A UKAS accredited certificate for the measurement of torque radius is supplied with
each beam.
• The < 0.04% uncertainty of applied torque achievable with this beam allows calibration
to the high classes of accuracy specified by BS7882:2008.
• Beam length machined to +/-0.01% (100 microns per meter).
• Clockwise and counter-clockwise operation.
• Beams balanced to maximise energy transfer to transducer during loading.
• High beam accuracy allows use of cast iron weights rather than stainless steel. Weight
accuracy is required to be equal to or better than 0.01%.
• High quality bearings to reduce energy losses.
• Gearbox provided to level beam and remove cosine errors.
• SI and Imperial Calibration possible with one beam (using different weights).
NOTE:
A temperature controlled environment is essential for use of these beams.The selection of weights will be
influenced by gravitational constant and air buoyancy values at the proposed laboratory site. See page 86.
5000 lbf.ft Calibration Beam
Range
Minimum
Maximum
500 N.m
500 lbf.ft
5000 N.m
5000 lbf.ft
Beam Part
No.
Radius to
Centre Line
of Hanger
Weight Set
Part No.s
Weight Set
Comprising
Diameter of
Weight
Hanger Rod
Drive
Square A/F
(in)
21842
21842
1275 mm
60 in
21469
21469
20 x 50 lbf
20 x 50 lbf
12 mm
12 mm
11⁄2
11⁄2
89
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Calibration Certificates
As a UKAS accredited calibration Laboratory No. 0256, Norbar is required to calibrate torque
measuring devices that are within the Laboratory’s scope, in accordance with BS 7882:2008. See the
‘UKAS Schedule of Accreditation’ on the ‘Calibration Services’ page of our website,
www.norbar.com.
Norbar can provide a comprehensive range of calibrations including increasing and decreasing
torques; clockwise and counter-clockwise; in either SI or English torque units, or in mV/V or Volts.
The sections below summarise the main features of BS 7882:2008, but purchase and careful study of
the standard is advised for those who wish more detailed information.
Procedure
• The “device” is defined as all parts of a system, e.g. Display,Transducer Cable, and Transducer.
Transducer cables will therefore be serial numbered if they are separate items.
• The output of the device is defined as “deflection”.
• It is preferable to calibrate all parts of a system together. If a transducer is sent for calibration without
its normal display unit, an equivalent calibrated display held in the laboratory will be used.The normal
display must also be in a calibrated state or the certification for the transducer is invalidated.
Instrument calibration bench
• Norbar is currently the only laboratory accredited by UKAS for the calibration of Electrical Torque
Measuring Indicators.
• Before any calibration or recalibration the torque measuring device is preloaded three times in
succession to the maximum applied torque of the device. Each preload is maintained for between 1
and 11/2 minutes to exercise the device and stabilise it in the calibration fixture.
• The device is calibrated with at least five approximately equal steps from 20% to 100% of maximum
torque. Lower values are allowed as long as they meet certain criteria for resolution.
• For Classes 0.05 and 0.1, it is mandatory to calibrate the torque measuring device in four different
mounting positions each rotated 90º about the measurement axis. For all other classes the device is
calibrated at a minimum of two different mounting position at least 90º apart.
• Two series of readings are taken, and the device is then disturbed, generally by being disconnected
from the calibration fixture and rotated through 90°.The device is then preloaded once to full scale.
A third series of readings are then taken.This process is repeated until readings have been recorded
in all required orientations.
• If reversibility is required, a single series of decreasing torques are applied at the end of the last
increasing series.
• Should calibration be required in both directions, the series of readings are repeated in the opposite
direction.
• The calibration data is then analysed to establish the following parameters.
Repeatability
The variation between the indicated deflection from series 1 and 2, expressed as a percentage of the
mean of the two readings.
Reproducibility
The maximum variation between series 1, 2 and 3, or series 1, 2, 3, 4 and 5 expressed as a
percentage of the mean indicated deflection calculated from series 1, 3 or series 1, 3, 4, and 5.
Error of Indication
Where the results are expressed in units of torque, the errors of indication are the variation between
each applied torque and the mean indicated deflection at that torque.
Error of Zero Torque
The maximum zero reading recorded after each loading series is expressed as a percentage of the
maximum mean indicated deflection.
90
Take Pride - Torque Norbar
Measurement and Calibration
Error of Interpolation
Where the results are expressed in volts or units other than torque units, a 2nd order
polynomial equation (best fit line) is established and the difference in deflection from the
computed value is expressed as a percentage of the computed value.
Reversibility
The variation between the readings from the last torque series applied in an increasing
mode and the readings for the same given torque applied in a decreasing mode.
Reversibility is expressed as a percentage of the deflection of the last increasing series for
the given torque.
Calibration office
Classification
• The parameters are each compared with a table to establish the device’s classification.
Class 0.05 is the highest performance, and class 5 is the lowest defined by the standard.
The overall class reported will be that of the lowest performing parameter. For example
reproducibility may be a class 1 when all other parameters meet class 0.5.The device will
be classified as 1.
• Additionally the uncertainty of measurement of the applied torque must be five times
better than the overall class reported. Norbar’s uncertainty of measurement (typically
0.02%) allows classification to Class 0.1 devices.
• Different classes may be quoted for ranges below 20% of maximum capacity.
91
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