operator`s manual length bar set for usm

operator`s manual length bar set for usm
OPERATOR’S MANUAL
NORBAR TORQUE TOOLS LTD
Beaumont Road, Banbury,
Oxfordshire, OX16 1XJ
UNITED KINGDOM
Tel + 44 (0)1295 270333
Email enquiry@norbar.com
NORBAR TORQUE TOOLS PTE LTD
194 Pandan Loop
#07-20 Pantech Business Hub
SINGAPORE 128383
Tel + 65 6841 1371
Email enquiries@norbar.sg
NORBAR TORQUE TOOLS
45–47 Raglan Avenue, Edwardstown,
SA 5039
AUSTRALIA
Tel + 61 (0)8 8292 9777
Email enquiry@norbar.com.au
NORBAR TORQUE TOOLS (SHANGHAI) LTD
E Building–5F, no. 1618 Yishan Road,
Minhang District, Shanghai
CHINA 201103
Tel + 86 21 6145 0368
Email sales@norbar.com.cn
NORBAR TORQUE TOOLS INC
36400 Biltmore Place, Willoughby,
Ohio, 44094
USA
Tel + 1 866 667 2279
Email inquiry@norbar.us
NORBAR TORQUE TOOLS INDIA PVT. LTD
Plot No A-168, Khairne Industrial Area,
Thane Belapur Road, Mahape,
Navi Mumbai – 400 709
INDIA
Tel + 91 22 2778 8480
Email enquiry@norbar.in
LENGTH BAR SET FOR USM
www.norbar.com
© Norbar Torque Tools Ltd 2015
Part Number 34340 | Issue 3 | Original Instructions (English)
CONTENTS
Part Numbers Covered by This Manual
2
Introduction
2
Set Up Instructions
Items Required
Procedure
2
2
2
Operating Instructions
Enter Temperature
Enter Temperature Factor
Main Screen
Velocity / System Zero
Length Bar 1 (Cal Bar 1)
Length Bar 2 (Cal Bar 2)
Optimise System Zero
3
3
3
3
4
4
4
5
1
PART NUMBERS COVERED BY THIS MANUAL
This manual covers Length Bar Set part number 61117.
INTRODUCTION
Two bars are supplied:
The shorter bar (approx. 3” or 76mm) is called “length bar 1” or “Cal Bar 1”.
The longer bar (approx. 6” or 152mm) is called “length bar 2” or “Cal Bar 2”.
The purpose of the Length Bar Set is to enable the USM system zero to be set. The setting of the system
zero allows results from one USM to be used with another USM without error; this is particularly important
should any part of the USM system become damaged.
The system zero is affected by the USM, the Transducer lead and the Transducer. If any of these 3 items
change the system zero will be affected.
This manual is written to detail use of the Length Bar Set; for full details of the USM operation please refer to
the USM operator’s manual.
WARNING:
TO KEEP THE LENGTH BARS PROTECTED WHEN NOT IN USE, STORE IN
CASE SUPPLIED.
WARNING:
IF THE LENGTH BARS ARE DAMAGED IN ANY WAY THEY WILL NEED
RECALIBRATING.
SET UP INSTRUCTIONS
Items Required

The USM, transducer lead & transducer that require a system zero.

Ideally a temperature controlled environment set at 20°C (68°F).

Length Bar Set.

Couplant.

Thermometer with an accuracy of ±0.5°C.

Calculator.
Procedure
1.
Before use allow all items to temperature stabilise for a minimum of 1 hour.
NOTE:
Handling of the transducer & length bar set can affect their temperature which will in turn
affect the results. It is essential that the transducer & length bars are handled as little as
possible during the stabilisation period and during testing.
2.
Connect the USM to the transducer.
3.
Place a small amount of liquid ultrasonic couplant onto the transducer.
Seat the transducer directly and completely on the length bar and ensure all trapped air and excess
couplant is squeezed out.
4.
Power up the USM. The use of mains power is recommended to eliminate any problems caused by a
low battery.
2
OPERATING INSTRUCTIONS
From USM main menu select “SETUP USM”.
Press “NEXT” until “MEASURE SYSTEM ZERO” is shown.
Select “MEASURE SYSTEM ZERO” to display the following screen:
F1
TEMPERATURE
20.0
F1
F2
TEMPERATURE FACTOR
60.0
F2
F3
CONTINUE
F3
Enter Temperature
In an ideal situation the ambient temperature will be 20°C (68°F) and the length bars will be at this
temperature. Measure the length bar temperature to within ±0.5°C and enter the value.
TIP:
If working in an ‘inch’ unit; temperature will be shown as “F” for Fahrenheit
If working in a ‘mm’ unit; temperature will be shown as “C” for Celsius.
If the wrong unit is shown, proceed to changing the VELOCITY, then return to set the
temperature.
Enter Temperature Factor
The temperature factor value depends on the thermal properties of the length bar material.
Unless stated on the length bars, use the following values:

For a value “F” for Fahrenheit use a Temperature Factor of 55.

For a value “C” for Celsius use a Temperature Factor of 99.
Main Screen
Select ‘continue’ to show the main screen.
The screen will display similar to this:
F1
CAL. BAR 1
3.0016
F2
CAL. BAR 2
5.9982
5.9980
F3
VELOCITY
5890000
SYS ZERO
12.0
3.0014
F1
F2
F3
The KNOWN LENGTH is shown on the left & the ULTRASONIC LENGTH is shown on the right.
3
Velocity / System Zero
Press F3 from the main screen to show:
F1
VELOCITY
5890000
F1
F2
SYSTEM ZERO
12.0
F2
F3
OPTIMIZE SYSTEM ZERO
5890000
F3
If the velocity of the length bar is known, enter the value.
If the velocity is not known, initially use 232000 (for an ‘inch’ unit) or 5890000 (for a ‘mm’ unit).
TIP:
If the velocity number is 6 digits long it will be taken as an ‘inch’ unit.
If the velocity number is 7 digits long it will be taken as a ‘mm’ unit.
Return to the main screen.
Length Bar 1 (Cal Bar 1)
1.
Ensure transducer is on the shorter length bar.
2.
Select CAL BAR 1.
3.
Enter KNOWN LENGTH from length bar certificate.
4.
Measure ULTRASONIC LENGTH and press ENTER to save value.
Length Bar 2 (Cal Bar 2)
1.
TIP:
Ensure transducer is on the longer length bar, or follow TIP below.
It is possible to use 1 length bar to complete both length bar measurements.
The advantages of this method include:
1. Eliminates the need to touch the transducer & Length bar between measurements.
2. Eliminates potential inconsistencies in couplant application.
3. Less time required to complete measurements.
TIP:
For CAL BAR 1 enter KNOWN LENGTH & measure ULTRASONIC LENGTH as normal.
TIP:
For CAL BAR 2 enter KNOWN LENGTH as exactly twice the value of Length Bar 1.
The ULTRASONIC LENGTH will measure a “double echo” to obtain the correct result.
2.
Select CAL BAR 2.
3.
Enter KNOWN LENGTH from length bar certificate.
4.
Measure ULTRASONIC LENGTH and press ENTER to save value.
4
Optimize System Zero
1.
In the “velocity / system zero” screen press OPTIMIZE SYSTEM ZERO.
The USM will create a system zero. This value is stored for all subsequent measurements.
2.
If the KNOWN LENGTH & ULTRASONIC LENGTH for both CAL BAR 1 & CAL BAR 2 match to within
±0.002mm or ±0.0002 inch then the procedure is finished.
If the lengths do not match complete the following:
a)
Check the temperature:
Measure the length bar temperature.
Ensure the correct TEMPERATURE value has been entered in the correct units.
b)
Check the temperature factor:
Ensure the correct TEMPERATURE FACTOR value has been entered in the correct units.
c)
Update the ultrasonic lengths:
Repeat ultrasonic measurements of the length bars.
Use OPTIMIZE SYSTEM ZERO.
If the lengths still do not match, the velocity may need to be updated:
d)
Update the velocity:
Calculate a new velocity by using:
New VELOCITY = old VELOCITY x
(KNOWN LENGH 2 - KNOWN LENGTH 1)
(ULTRASONIC LENGTH 2 - ULTRASONIC LENGTH 1)
Enter the new VELOCITY into the USM.
Press OPTIMIZE SYSTEM ZERO.
5
OPERATOR’S MANUAL
NORBAR TORQUE TOOLS LTD
Beaumont Road, Banbury,
Oxfordshire, OX16 1XJ
UNITED KINGDOM
Tel + 44 (0)1295 270333
Email enquiry@norbar.com
NORBAR TORQUE TOOLS PTE LTD
194 Pandan Loop
#07-20 Pantech Business Hub
SINGAPORE 128383
Tel + 65 6841 1371
Email enquiries@norbar.sg
NORBAR TORQUE TOOLS
45–47 Raglan Avenue, Edwardstown,
SA 5039
AUSTRALIA
Tel + 61 (0)8 8292 9777
Email enquiry@norbar.com.au
NORBAR TORQUE TOOLS (SHANGHAI) LTD
E Building–5F, no. 1618 Yishan Road,
Minhang District, Shanghai
CHINA 201103
Tel + 86 21 6145 0368
Email sales@norbar.com.cn
NORBAR TORQUE TOOLS INC
36400 Biltmore Place, Willoughby,
Ohio, 44094
USA
Tel + 1 866 667 2279
Email inquiry@norbar.us
NORBAR TORQUE TOOLS INDIA PVT. LTD
Plot No A-168, Khairne Industrial Area,
Thane Belapur Road, Mahape,
Navi Mumbai – 400 709
INDIA
Tel + 91 22 2778 8480
Email enquiry@norbar.in
LENGTH BAR SET FOR USM
www.norbar.com
© Norbar Torque Tools Ltd 2015
Part Number 34340 | Issue 3 | Original Instructions (English)
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