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SERVICE INFORMATION FROM HEWLETT-PACKARD
2nd/3rd/4th Quarters 1995
I
I Ellements of a Standards Lab
Bob Pitcock/Hewlett-Packard 4. Is the required expertise available to 4. Determine what functions actually
operate a standards lab? As a mini- require standards lab support.
mum, you will need to consult with
Introduction an expert in the field to determine 5. Perform the required calibrations.
The purpose of a standards lab is to the feasibility of a lab. 6. Documentation and record retention.
provide traceability from a national This article will describe the various
standard to the products being manu- functions of a standards lab that you Provide Traceability Path
factured. Standards lab calibrations are should consider, if you are thinking
generally high level calibrations that Figure 1represents a typical traceabil-
about starting a lab of your own. They ity path to a national calibration labo-
are performed under controlled condi- are:
tions. This should not be confused with ratory. The areas represented by the
blocks must be able to show proof, by
c the basic instrument maintenance or
calibration services that most manufac-
turing facilities provide.
1. Provide the traceability path for cali-
brations to a national standard.
2. Help determine calibration require-
means of a calibration certificate or
other acceptable methods, of traceabil-
ity to the national standard. If an ex-
ments for production test equipment. ternal calibration source is used, you
This article will describe the basic, non- must be able to verify its competence
technical requirements and need for a 3. Provide consultation services to pro- to assure its traceabilih. to the national
Measurement Standards Laboratory duction and engineering as required. standard.
operated in a manufacturing
environment.
The first thing to do is ask yourself
some questions: (N15Tj
1. What is needed to support produc-
tion? This could include equipment,
personnel, expertise, training, floor EXTERNAL
REFERENCE
space, and cost of operation.
2. Is a standards lab necessary, or
would it be a burden to production?
f
I
Operation of a standards lab can be
very expensive. Consider return on
investment and value added to
manufacturing. You may also con-
CUSTOMERS
R&D
M&TE
sider offering calibration services to
other production entities within R&D
your company to help offset the cost LABORATORY M&TE
I of operating the lab. I
NOTE:
3- 3. Could the required calibrations be
performed by another lab, taking
M&TE = MEASUREMENT
AND TEST EQUIPMENT
PRODUCTION
into consideration quality, cost, turn
around times, traceability, and stan-
dards (such as IS09000)? Figure 1. Vpical Traceability Path
Pub. NO. 5964-6003E 0 Hewlett-Packard 1995
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Determine Calibration port a state of the art process if you cess in the operation of a standards lab.
rely on external calibration sources. Some of the things you should consider
Requirements
In order to meet the requirements of 3. Is a standards lab operation the only
in the calibration process are: (7
calibration system standards, such as way to maintain the required test ac- ' Technician training. You should have
1.
IS0 Guide 25 or ANSI/NCSL 2540-1, curacy ratios?You must be very care- a documented training record for
documenting measurement uncertain- ful to maintain the required measure- each employee, and a document
ties and test accuracy ratios is a must. ment uncertainty for each measure- containing the scope of each job. The
A test accuracy ratio is the ratio of the ment parameter. Sometimes, the only training record should contain the
measurement uncertainty of the mea- way to do that is to have more con- date and name of each class taken
surement system to the accuracy re- trol over the traceability and uncer- that pertains to the employee's job.
quirement of the unit under test. In tainty process, which means a stan-
general, the accepted test accuracy ra- dards lab may be necessary. 2. Follow all procedures, including in-
tio is 4 l Exceptions may be made if
:. dividual calibration procedures. The
the process is well documented and it 4. Turn-around-time considerations.If technician must be able to demon-
is shown that the reduced test accuracy equipment down-time is critical, strate that each procedure is being
ratio does not affect product quality. In turn-around-times by a standards followed. Some companies actually
simple terms, if the accuracy specifica- lab may not be acceptable. You will require that calibration procedures
tion of a unit under test at 1vdc is O.lv, need to compare the cost of down- be opened and at the workstation
then the standard used must have a time to the cost of operating a stan- during calibrations.
total measurement uncertainty of dards lab during non-production
0.025~ less in order to achieve a test
or hours. Cost of down-time is difficult 3. Make sure that all calibration equip-
accuracy ratio of at least 4:l. to measure. It could even mean the ment is traceable and its calibration
loss of future business because of is current. An easy rule to follow is
unhappy customers. You may need to actually look at the calibration
There are several acceptable methods stickers on the calibration equip-
of calculating measurement uncer- to consider duplication of equip-
ment for critical operations. ment each day. If it's overdue, don't
tainty that I will not discuss here. They
use it. If you do, the traceability
generally consist of simply adding all
Provide Consultation Services chain is BROKEN.
uncertainties in the calibration system,
or selecting a statistical method. There
have been many very good papers
written on the subject. One good docu-
When properly trained, standards lab
personnel will be recognized as experts
4. Make sure all required parameters
are checked and that all required "7
in their fields of measurement. You will documentation is completed and
ment to refer to is the ISORAG 4, Guide properly filed.
work with R&Dto determine traceabil-
to the Expression of Uncertainty in
ity requirementsfor new products. This
Measurement. 5. Update calibration recall system and
includes determining required specifi-
cations for test equipment and new records as necessary.
There are several items to consider calibration equipment if necessary.
about setting up a standards lab. You With the rapid advancementin technol- Documentation
need to determine what functions, or ogy, you will need to stay informed of
parameters of production that test new instrumentation available in your Documentation and record keeping is
equipment actually requires from stan- fields of expertise. As manufacturing a large part of the operation of a stan-
dards lab support: moves into new fields, you will need dards lab. Some of the records that
to broaden your own measurement should be kept and maintained are:
1. It should be cost effective. Don't knowledge in order to maintain your
status as an expert. Department procedures or a calibra-
spend $100,000 in test equipment to
tion system description.This should
support the calibrationrequirements
R&D may ask for your assistance in include a simple, but complete de-
of one DVM. You need to consider
designing new test systems. If they do, scription of the total calibration
the "return on investment" of the
this will ensure that you will have the operation.
equipment you purchase. In a rea-
sonable period of time, the savings capability to calibrate all of the equip-
ment in the system. Nothing can be Calibration procedures. These proce-
reahzed from calibrating equipment dures should include, as a minimum,
in house, instead of sending it out, more frustrating than being bom-
barded with a test system full of equip- procedure name, date, revision num-
must come close to paying for the ber, required equipment, required
new calibration equipment pur- ment that you can't calibrate. You will
either have to send the equipment to standards, unit under test specifica-
chased. There are other factors, such tions, uncertainties of standards,
as turn-around-times,that should be another lab or wait until you can get
the necessary equipment and calibra- TAR, and description of process.
considered.
2. Is it state of the art? You may have
tion procedures in place.
Calibration worksheets for produc-
tion test equipment. Worksheets
-1
Perform Required Calibrations
to spend more money in order to be must contain calibration data, such
able to support this type of measure- The actual calibration process may be as before and after adjustment data
ment. It can be very difficult to sup- the easiest, most straightforward pro- and out of tolerance data. They must
2 BENCH BRIEFS 2NDI3RDl4TH QUARTERS 1995
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also contain instrument identifica- traceability purposes and audits must be kept for at least one calibra-
tion, cal date, cal due date, standards performed on your lab by your cus- tion cycle. Generally, records are
used, and other information of im- tomers. kept for several years.
portance to your operation.
7. Calibration recall system and his- 9. Capabilities chart. Figure 2 is a rep-
tory records. Most recall systems resentation of a capabilities chart
4. Calibration worksheets or calibra- are computer based. History that includes function, range, fre-
tion reports for standards lab test records may be either on disc or quency, and best measurement un-
equipment and reference standards. hard copy. certainty.
5. Individual training records. 8. Record retention process. There Summary
must be a documented procedure
6. Audit reports. These are audits per- for the retention time for calibration Whether you decide to operate your
formed on an outside lab used for records. As a minimum, records own standards lab or utilize an out-
RANGE FREQUENCY
0 TO 1 VOLT
1 TO 100 VOLTS
100 TO 1000 VOLTS
AC VOLTAGE 1 TO 3 VOLTS 10 HZ
20 HZ TO 50 KHZ
100 KHZ
1 MHZ
c 3 TO 10 MHZ
20 TO 30 MHZ
40 TO 60 MHZ
70 TO 100 MHZ
1 TO 1000 VOLTS 10 HZ TO 10 MHZ
FREQUENCY 1 TO 10 MHZ
TIME
TEMPERATURE -20TO +220 DEG C
LASER WAVELENGTH 632 NANOMETERS
LASER POWER 10 TO 1000 MICROWATTS 632 NANOMETERS
RESISTANCE .001 OHMS
.01 TO .1 OHMS
1 OHM TO 10 OHMS
100 OHMS TO 1 MEGOHM
10 MEGOHMS
100 MEGOHMS
1 GIGAOHM
r 10 GIGAOHMS
100 GIGAOHMS
HUMIDITY LIMITED-BY REQUEST
Figure 2 Standards Lab Capabilities Chart
.
2ND13RD14TH QUARTERS 1995 BENCH BRIEFS 3
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side lab for your standards calibra- and have it calibrated than break the U.S. Air Force from 1961through 1965.
tions, you must remember to comply traceability chain. You need to have a He received his AA degree in electron-
with your country's calibration system system or a person to monitor calibra- ics technology from Modesto Junior
requirements. If your company is tion dates for all equipment, from the College, Modesto, California in 1968.
IS09000 registered, you will probably primary standards right down to the He began his career with HI' in 1968 as
need to comply with IS0 Guide 25 production test equipment. an electronic technician in Palo Alto,
(General Requirements for the Com- California. He moved to the Santa
petence of Calibration and Testing In conclusion, always remember that the Clara (California) Division Standards
Laboratories). heart of quality in instrument manufac- Lab in 1972 as a calibration technician.
turing has a direct relationship to the He became supervisor of the standards
All calibration requirements state that integrity of your calibration system. lab in 1986. In 1992 his role expanded E
to include supervision of the standards
you must maintain an unbroken chain
of traceability from your equipment to lab and electronicmaintenance.For the I
About The Author past year Bob has served as an Engi-
a national standard. The most common
factor that breaks the chain is using Bob Pitcock received his initial electron- neering Specialist, Senior in the Santa
equipment that is actually overdue for ics training at Keesler Air Force Base, Clara Division Standards Lab. He has
calibration. If it is overdue, don't use Biloxi, Mississippi in aircraft naviga- been in the standards lab business for
it. It is better to take it out of service tion equipment repair. He served in the a total of 23 years. 0
tardant standards and should be re- paired at no charge. For more informa-
Safety-Re!ated placed. Inverter boards marked with tion, order Safety Service Notes
70001A-20-S or 70004A-15-S as docu-
service Notes LOT 56 on the transformer in instru-
ments within the serial number pre- ment ID numbers 6320 or 6322 from the
fixes should have this modification to HP FIRST system or your nearest HP
Service Notes from Hewlett-Packard prevent instrument damage. Sales and Service office.
relating to personal safety and possible
equipment damage are of vital impor- Return your instrument to the nearest
17
tance to our customers. To make you HP Service Center and it will be re- HP 9470,9472, (OT2000,
more aware of these important notes, paired at no charge. For more informa- OT3000,OT4000) Automatic
they are printed on paper with a red tion, order Priority Safety ServiceNotes
border, and the service note number Test Systems
has an "-S" suffix. In order to make you J2301B-01-S- doc. ID no. 6377
immediately aware of any potential J2302B-01-S- doc. ID no. 6378 Serial Numbers Affected:
safety problems, we are re-highlighting
safety-related service notes here with J2522B-01-S- doc. ID no. 6379 The serial number range is listed within
a brief description of each problem. J2523B-01-S- doc. I no. 6380
D the contents of the service note.
Also, in order to draw your attention
to safety-related service notes in the from the HP FIRST system or from your There is a faulty diode CR8 on the TH-
service note index, each safety-related nearest HP Sales and Service office. 200 Test Head Motherboard that can
service note is highlighted with a con- defeat high voltage safety interlocks to
trasting color. HP 70001A Rr 70004A Modular the test head, which can cause a severe
Measurement Systems shock hazard to the operator. Note that
this problem only occurs when CR8 is
HP J2301B & J2302B Internet present on the TH-200 motherboard.
Serial Numbers Affected:
Advisor
HP J2522B & J2523B Internet The serial number range is extensive All attempts have been made to con-
Advisor and listed within the service note text. tact HP customers that purchased these
systems prior to January 1995of the po-
Serial Numbers Affected: Faulty electrolytic capacitors on the tential shock hazard associated with
J2301B -US35340101 / US35340548 power supply board may leak electro- the TH-200 Test Head. However, it is
lytes across high voltage PC board possible that there are systems with the
J2302B -US35340102 / US35350393 problem that are not on our list. If you
traces leading to a potential fire haz-
J2522B -US35300102,US35300103, and ard. Failures result in a blown main own one of these systems and have not
US35300788
J2523B -US35300104 and US35300105
fuse, are self-extinguishing and are
completelycontained within the instru-
been contacted by Hewlett-Packard,
please get in touch with your nearest 9
ment housing. HP Sales and Service Office at once.
The 0950-2937 Display Board Inverter
assembly installed into the display Return your instrument to the nearest This service note is available through
does not meet Hewlett-Packard fire re- HP Service Center and it will be re- the HP SupportLine. 0
4 BENCH BRIEFS 2NDl3RDl4TH QUARTERS 1995
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I995 Bench Briefs' Instrument Service Note Index
HP FIRST (208)344-4809
T & M lnstmment Section - Press 4
T & M Service Notes - Press 2
Enter the Password - 76683
~~ ~~
SN SN Abstract H p FIRST
Type No. Document ID No.
MR 10889B-01 Resoldering address switch S2 corrects intermittents 6266
MR 11807C-01 New card corrects connectivity test results 6261
MR 11807C-02 New card corrects wrong system calibration of 1428 M H z loss 6268
MR 11982A-01 Additional DC grounding improves noise performance 6269
IO 15801A-01 Revision 1.2 software corrects spelling mistakes 6270
MA 16500B-02 Increasing RAM from 8 MB to 16 MB improves performance 627 1
MR 16555A-02 Mod corrects Master/Expander operation 6272
MA 3488A-16 New power transformer improves voltage regulator reliability 6273
MR 3488A-17 New component-side shield reduces module-to-module clearance 6274
IO 3562A-13 New 03562-61608 cable may cause A1 assembly short 6275
IO 3562A-14 Front panel replacement requires new power switch 6276
IO 3563A-03 New 03562-61608 cable may cause A1 assembly short 6277
MR 3764A-30 Addition of ferrite bead improves return loss at "Mb/srates 6278
IO 37701A-08 Recommended replacement assemblies 6279
MR 37704A-02 Power supply modification improves performance 6280
7 MR 37717A-01 Incorrect modification causes reduced NVM battery life 628 1
MR 37717A-02 Firmware upgrade improves performance and eliminates minor bugs 6282
MR 37717A-03 Firmware upgrade improves performance of 120 ohm balanced output 6283
MR 37717A-04 Modification improves connection of output cable to PDH T assembly
x 6284
MR 317 11A-05 Modification c o m t s jitter receiver HPZ filter characteristics 6285
IO 37717A-06 Retrofit kit enhances jitter measurement accuracy 6286
IO 37721A-07A Instructions on replacing the power supply 53 14
MR 37722A-03 Mod prevents hang-up in Stored Measurement Graphics mode 6287
IO 37724A-04 New version of the calibration manual (containing performance tests) 6288
MR 37724A-05 New fan filter improves filtration performance 6289
MR 37732A-05 Grounding modification reduces electromagneticinterference 6290
MR 37732A-06 Mod prevents hang-up in Stored Measurement Graphics mode 6291
MR 3784A-06 Bad cable connector causes power up test failure 6292
IO 4263A-04 External voltage/current will damage the LCR meter 6293
MR 4986A-01 Modification to power modules improves 5 VDC stability 6294
IO 5342A-61 New assembly requires padjumper mod for compatibility 6295
IO 5343A-33 New assembly requires padjumper mod for compatibility 6296
IO 54520A-01 Elimination of two kits in the service manual parts list 6297
IO 54520C-01 Elimination of two kits i the service manual parts list
n 6298
IO 54522A-01 Elimination of two kits in the service manual parts list 6299
IO 54522C-01 Elimination of two kits in the service manual parts list 6300
IO 5454OA-0 1 Elimination of two kits in the service manual parts list 6301
IO 54540C-01 Elimination of two kits in the service manual parts list 6302
IO 54542A-01 Elimination of two kits in the service manual parts list 6303
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SNDBRDI4TH QUARTERS 1995 BENCH BRIEFS 5
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SN SN Abstract MP FIRST
Type No. Document D No.
IO
MR
54542C-01
54600B-02
Elimination of two kits in the service manual parts list
Mod improves oscilloscope printing using RS-232 modules
6304
6305
r
MR 54601B-02 Mod improves oscilloscope printing using RS-232 modules 6306
MR 54602B-02 Mod improves oscilloscope printing using RS-232 modules 6307
MR 54603B-01 Mod improves oscilloscope printing using RS-232 modules 6308
MR 54610B-01 Mod improves oscilloscope printing using RS-232 modules 6309
IO 54610B-02 External trigger specification change 63 10
MR 54651A-0 1 Mod improves oscilloscope printing using RS-232 modules 6311
MR 54652B-01 Mod improves oscilloscope printing using RS-232 modules 63 12
MR 54656A-02 Mod improves oscilloscope printing using RS-232 modules 6313
MR 54658A-01 Mod improves oscilloscope printing using RS-232 modules 6314
MR 54659B-01 Mod improves oscilloscope printing using RS-232 modules 63 15
MR 5517A/18A-01B Recommended repair of sampler assembly 63 16
MR 6812A-05 Mod corrects error in programmed gate array logic that may cause voltage overshoot 63 17
MR 6813A-05 Mod corrects e m r in programmed gate array logic that may cause voltage overshoot 63 18
MR 70001A-19 Modification to prevent modular system interface bus lockup 6319
SA 70001A-20-S Bad capacitors may cause equipment failure and fire 6320
MR 70004A-14 Modification to prevent modular system interface bus lockup 6321
SA 70004A- 15-S Bad capacitors may cause equipment failure and f rie 6322
MA 7 1612A-01 Recommended modification to improve performance 6323
IO 8146A-01 Recommended flexible disk drive replacement 6324
MR 83215A-01 Mod corrects halting ANT IN output due to momentary pwr fail 6325
M R 83215A-02 Mod corrects RX sensitivity measurement value 6326
MA 83215A-03 New FW allows greater ext losses on system calibration 6327
MA 83215B-01 New FW allows greater ext losses on system calibration 6328
MR 85110A-01 Defective test set switch generates overmodulation e m r 6329
MR 85110M1 Defective test set switch generates overmodulation e m r 6330
MR 8514A-04 Defective test set switch generates overmodulation e m r 633 1
MR 8514B-01 Defective test set switch generates overmodulatione m r 6332
MR 8515A-04 Defective test set switch generates overmodulation e m r 6333
MR 85 17A-01 Defective test set switch generates overmodulatione m r 6334
MR 8517B-01 Defective test set switch generates overmodulation e m r 6335
MR 85422E-02 EEROM firmware upgrade corrects bugs 6336
MR 85462A-02 EEROM firmware upgrade corrects bugs 6337
MR 8560E-12 Modification improves power supply reliability 6338
MR 8561E-09 Modification improves power supply reliability 6339
MR 8563E-11 Modification improves power supply reliability 6340
MR 8564E-05 Modification improves power supply reliability 6341
MR 8565E-05 Modification improves power supply reliability 6342
MR 85685A-16 Mod kit corrects Diagnostic #1 failure 6343
MA 8590D-07 New firmware corrects display annotation 6344
MA 8590L-03 New firmware corrects display annotation 6345
MA 8591C-04 New firmware corrects display annotation 6346
MA 8591E-07 New firmware corrects display annotation 6347
MA 8592D-05 New firmware corrects display annotation 6348
MA 8592M3 New firmware corrects display annotation 6349
MA 8593E-09 New firmware corrects display annotation 6350
MA 8594E-09 New firmware corrects display annotation 635 1
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6 BENCH BRIEFS 2NDl3RDl4TH QUARTERS 1995
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SN SN Abstract m FIRST
Type No. Document No.
fl
I_
I
MA 8595E-09 New firmware corrects display annotation 6352
MA 8596E-09 New firmware corrects display annotation 6353
IO 8648B-01 No RF out failure caused by not turning pulse mod off 6354
IO 8648C-01 No RF out failure caused by not turning pulse mod off 6355
IO 8656B-10 Semi-rigid cable replacement instructions 6356
IO 8657A-02 Semi-rigid cable replacement instructions 6357
IO 8657A-03 Manual corrections reflect new ALC Loop det adj 6358
IO 8657B-03 Semi-rigid cable replacement instructions 6359
MR 87510A-13 New F/W prevents incorrect calibration being saved on floppy disk 6360
MR 87510A-14 New FW eliminates "ExternalReference Locked" msg & HP-IB "Extrlock?" 6361
MR 8751A-25 New F/W prevents incorrect calibration being saved on floppy disk 6362
MR 892ODTS-02 New card corrects connectivity test results 6363
MR 892ODTS-03 New installation card corrects system calibration 6364
MA 89410A-01G HP 89410 Firmware revision history 5710
MR 89430A-04 New power switch improves reliability 6365
IO 89430A-05 Use IF Filter Kit for A22, A23, A24, A3 1, and A32 assembly replacement" 6366
MR 89431A-02 New power switch improves reliability 6367
MR El 431A-02 Firmware upgrade corrects defects causing lockups 6368
MR El 431A-03 Replacement module corrects defect causing power-up module lockup 6369
IO E162A-02 Optical failures due to improper cleaning of optical connectors 6370
MR E1693A-01 Replacement modules c o m t spurious cell loss errors 6371
MR E1694A-01 Replacement modules c o m t spurious cell loss errors 6372
IO E1696A-02 Optical failures due to improper cleaning of optical connectors 6373
IO E1697A-02 Optical failures due to improper cleaning of optical connectors 6374
IO E1698A-01 Optical failures due to improper cleaning of optical connectors 6375
IO E2555A-02 Identifying failed channel disk and SCSI interface assembly location 6376
PS J2301B-0I-S New inverter board reduces chance of fire hazard 6377
PS J2302R-01-S New inverter board reduces chance of fire hazard 6378
PS J2522B-01-S New inverter board reduces chance of fire hazard 6379
MR J2522B-02 Modification corrects improper Jam Signal to network 6380
PS J2523B-01-S New inverter board reduces chance of fire hazard 6381
MR J2523B-02 Modification corrects improper Jam Signal to network 6382
Service Note Types
IO Information Only SA Safety
MA Modification Available PS priority Safety
M R Modification Recommended
1
2NDI3RDJ4TH QUARTERS 1995 BENCH BRIEFS 7
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Oxford English Dictionary)and "isonomy" (equalityof laws,
or of people before the law - ibid.).
From "equal" to "standard," the line of thinking that led to
the choice of " I S 0 as the name of the organization is easy C'
300 or some of the to follow.
invariably asked, In addition, the name has the advantage of being valid in
:-Packard is noted each of the organization's three official languages - English,
ything, that ques- French, and Russian.The confusion that would arise through
.nd our coffee pot. the use of an acronym is thus avoided, e.g., "10s"would not
SO is a word, de- correspond to the official title of the organization in French-
ual," which is the Organization Internationale de Normailisation.
in a host of terms, The above information was taken from IS0 on-line through
mensions - Shorter the Internet. 0
c
Bulk Rate
U.S. Postage
PAID
Santa Clara, CA
Permit No.
90
All rights reserved Permission lo reprint Bench Briefs granted upon written request to the Editor Printed in U.S.A
2NDI3RD14TH QUARTERS 1995
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