HP EPM E4418A User manual

HP Part no. E4418-90006
Service Guide
HP EPM E4418A/E4419A
(EPM-441A/442A)
Power Meters
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ii HP EPM-441A/442A Service Guide
© Copyright Hewlett-Packard Company
All rights reserved. Reproduction, adaptation, or translation without prior
written permission is prohibited, except as allowed under the copyright
laws.
Printed in the UK.
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Legal Information
HP EPM-441A/442A Service Guide iii
Legal Information
Notice
Information contained in this document is subject to change without
notice. Hewlett-Packard makes no warranty of any kind with regard to
this material, including, but not limited to, the implied warranties of
merchantability and fitness for a particular purpose. Hewlett-Packard
shall not be liable for errors contained herein or for incidental or
consequential damages in connection with the furnishings, performance,
or use of this material. No part of this document may be photocopied,
reproduced, or translated to another language without the prior written
consent of HP.
Certification
Hewlett-Packard Company certifies that this product met its published
specifications at the time of shipment from the factory. Hewlett-Packard
further certifies that its calibration measurements are traceable to the
United States National Institute of Standards and Technology, to the
extent allowed by the Institute’s calibration facility, and to the calibration
facilities of other International Standards Organization members.
Warranty
This Hewlett-Packard instrument product is warranted against defects in
material and workmanship for a period of one year from date of shipment.
During the warranty period, Hewlett-Packard Company will at its option,
either repair or replace products which prove to be defective. For warranty
service or repair, this product must be returned to a service facility
designated by HP. Buyer shall prepay shipping charges to HP and HP
shall pay shipping charges, duties, and taxes for products returned to HP
from another country. HP warrants that its software and firmware
designated by HP for use with an instrument will execute its
programming instructions when properly installed on that instrument.
HP does not warrant that the operation of the instrument, or firmware
will be uninterrupted or error free.
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Legal Information
iv HP EPM-441A/442A Service Guide
Limitation of Warranty
The foregoing warranty shall not apply to defects resulting from improper
or inadequate maintenance by Buyer, Buyer-supplied software or
interfacing, unauthorized modification or misuse, operation outside of the
environmental specifications for the product, or improper site preparation
or maintenance. NO OTHER WARRANTY IS EXPRESSED OR IMPLIED.
HP SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
Exclusive Remedies
THE REMEDIES PROVIDED HEREIN ARE BUYER’S SOLE AND
EXCLUSIVE REMEDIES. HP SHALL NOT BE LIABLE FOR ANY
DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY
OTHER LEGAL THEORY.
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Equipment Operation
HP EPM-441A/442A Service Guide v
Equipment Operation
Warnings and Cautions
This guide uses warnings and cautions to denote hazards.
WARNING A warning calls attention to a procedure, practice or the
like, which, if not correctly performed or adhered to, could
result in injury or the loss of life. Do not proceed beyond a
warning until the indicated conditions are fully
understood and met.
Caution A caution calls attention to a procedure, practice or the like which,
if not correctly performed or adhered to, could result in damage to
or the destruction of part or all of the equipment. Do not proceed
beyond a caution until the indicated conditions are fully
understood and met.
Personal Safety Considerations
WARNING This is a Safety Class I product (provided with a protective
earthing ground incorporated in the power cord). The
mains plug shall only be inserted in a socket outlet
provided with a protective earth contact. Any interruption
of the protective conductor, inside or outside the
instrument, is likely to make the instrument dangerous.
Intentional interruption is prohibited.
If this instrument is not used as specified, the protection
provided by the equipment could be impaired. This
instrument must be used in a normal condition (in which
all means of protection are intact) only.
No operator serviceable parts inside. Refer servicing to
qualified personnel. To prevent electrical shock, do not
remove covers.
For continued protection against fire hazard, replace the
line fuse(s) only with fuses of the same type and rating (for
example, normal blow, time delay, etc.). The use of other
fuses or material is prohibited.
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Equipment Operation
vi HP EPM-441A/442A Service Guide
General Safety Considerations
WARNING Before this instrument is switched on, make sure it has
been properly grounded through the protective conductor
of the ac power cable to a socket outlet provided with
protective earth contact.
Any interruption of the protective (grounding) conductor,
inside or outside the instrument, or disconnection of the
protective earth terminal can result in personal injury.
Caution Any adjustments or service procedures that require operation of
the instrument with protective covers removed should be
performed only by trained service personnel.
Markings
The CE mark shows that the product complies with
all the relevant European legal Directives (if
accompanied by a year, it signifies when the design
was proven.
This is the symbol of an Industrial Scientific and
Medical Group 1 Class A product.
The CSA mark is a registered trademark of the
Canadian Standards Association.
External Protective Earth Terminal.
While this is a Class I product, provided with a
protective earthing conductor in a power cord, an
external protective earthing terminal has also been
provided. This terminal is for use where the earthing
cannot be assured. At least an 18AWG earthing
conductor should be used in such an instance, to
ground the instrument to an assured earth terminal.
ISMGroup 1
Class A
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Equipment Operation
HP EPM-441A/442A Service Guide vii
IEC 1010-1 Compliance
This instrument has been designed and tested in accordance with IEC
Publication 1010-1 +A1:1992 Safety Requirements for Electrical
Equipment for Measurement, Control and Laboratory Use and has been
supplied in a safe condition. The instruction documentation contains
information and warnings which must be followed by the user to ensure
safe operation and to maintain the instrument in a safe condition.
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List of Related Publications
viii HP EPM-441A/442A Service Guide
List of Related Publications
The HP EPM-441A and HP EPM-442A User’s Guides are also available in
the following languages:
• English Language User’s Guide - Standard
• German Language User’s Guide - Option ABD
• Spanish Language User’s Guide - Option ABE
• French Language User’s Guide - Option ABF
• Italian Language User’s Guide - Option ABZ
• Japanese Language User’s Guide - Option ABJ
HP EPM-441A/442A Service Guide is available by ordering Option 915.
HP EPM-441A/442A CLIPs (Component Location and Information Pack)
is available by ordering E4418-90007.
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Sales and Service Offices
HP EPM-441A/442A Service Guide ix
Sales and Service Offices
If you need technical assistance with a Hewlett-Packard test and
measurement product or application please contact the Hewlett-Packard
office or distributor in your country.
Asia Pacific:
Hong Kong: (852) 2599 7889
India: (91-11) 647 2311
Japan:
Hewlett-Packard Japan Ltd.
Measurement Assistance Center
9-1, Takakura-Cho, Hachioji-Shi,
Tokyo 192, Japan
Tel: [phone]
Fax: [phone]
Korea: (82-2) 769 0800
Malaysia: (60-3) 291 0213
Philippines: (63-2) 894 1451
PRC: (86-10) 6505 0149
Singapore: (1800) 292 8100
Taiwan: (886-3) 492 9666
Thailand: (66-2) 661 3900
For countries in Asia Pacific not listed contact:
Hewlett-Packard Asia Pacific Ltd.
17-21/F Shell Tower, Times Square,
1 Matheson Street, Causeway Bay,
Hong Kong
tel: [phone]
fax: [phone]
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Sales and Service Offices
x HP EPM-441A/442A Service Guide
Australia/New Zealand:
Hewlett-Packard Australia Ltd.
31-41 Joseph Street
Blackburn, Victoria 3130
Australia
1 800 629 485
Canada:
Hewlett-Packard Canada Ltd.
5150 Spectrum Way
Mississauga, Ontario
L4W 5G1
[phone]
In Europe, Africa and Middle East please call your local HP sales office or
representative:
Austria: (1) 25000-0
Belgium and Luxembourg: [phone]
Baltic Countries: (358) 08872 2100
Czech Republic: (0042) 2-4743111
Denmark: 45 99 10 00
Finland: (90) 88 721
France: (0) 1 69.29.41.14
Germany: (0180) 532 62-33
Greece: (1) 7264045
Hungary: (1) 252 4705
Ireland: [phone]
Israel: [phone]
Italy: 02 - 92 122 241
Netherlands: [phone]
Norway: (22) 73 56 50
Poland: (22) 608 7700
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Sales and Service Offices
HP EPM-441A/442A Service Guide xi
Portugal: (11) 482 85 00
Russia: tel [phone], fax [phone]
South Africa: [phone]
Spain: (34) 1 631 1323
Sweden: (08) 444 22 77
Switzerland: [phone]
Turkey: (212) 224 59 25
United Kingdom: [phone]
For countries in Europe/Middle East and Africa not listed, contact:
Hewlett-Packard
International Sales Europe
Geneva, Switzerland
Tel: [phone]
Fax: [phone]
Latin America:
Hewlett-Packard
Latin American Region Headquarters
5200 Blue Lagoon Drive
9th Floor
Miami, Florida 33126
USA
[phone]/4220
United States:
Hewlett-Packard Company
Test and Measurement Organization
5301 Stevens Creek Blvd.
Bldg. 51L-SC
Santa Clara, CA 95052-8059
1 800 452 4844
In any correspondence or telephone conversations, refer to the power
meter by its model number (which is on the front panel) and full serial
number (which is on the rear panel). With this information, the HP
representative can quickly determine whether your unit is still within its
warranty period.
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Sales and Service Offices
xii HP EPM-441A/442A Service Guide
Returning Your Power Meter for Service
Use the information in this section if you need to return your power meter
to Hewlett-Packard.
Package the Power Meter for Shipment
Use the following steps to package the power meter for shipment to
Hewlett-Packard for service:
1. Fill in a blue service tag (available at the end of this guide) and
attach it to the power meter. Please be as specific as possible about
the nature of the problem. Send a copy of any or all of the
following information:
■Any error messages that appeared on the power meter display.
■Any information on the performance of the power meter.
Caution Power meter damage can result from using packaging materials
other than those specified. Never use styrene pellets in any shape
as packaging materials. They do not adequately cushion the power
meter or prevent it from shifting in the carton. Styrene pellets
cause power meter damage by generating static electricity and by
lodging in the rear panel.
2. Use the original packaging materials or a strong shipping
container that is made of double-walled, corrugated cardboard
with 159 kg (350 lb) bursting strength. The carton must be both
large enough and strong enough to accommodate the power meter
and allow at least 3 to 4 inches on all sides of the power meter for
packing material.
3. Surround the power meter with at least 3 to 4 inches of packing
material, or enough to prevent the power meter from moving in
the carton. If packing foam is not available, the best alternative is
SD-240 Air Cap TM from Sealed Air Corporation (Commerce, CA
90001). Air Cap looks like a plastic sheet covered with 1-1/4 inch
air filled bubbles. Use the pink Air Cap to reduce static electricity.
Wrap the power meter several times in the material to both
protect the power meter and prevent it from moving in the carton.
4. Seal the shipping container securely with strong nylon adhesive
tape.
5. Mark the shipping container “FRAGILE, HANDLE WITH CARE”
to ensure careful handling.
6. Retain copies of all shipping papers.
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About this Guide
HP EPM-441A/442A Service Guide xiii
About this Guide
Chapter 1: Specifications
This chapter lists the power meter’s specifications and describes how to
interpret these specifications.
Chapter 2: Performance Tests
This chapter contains procedures which allow you to test the power
meter’s electrical performance to it’s specifications.
Chapter 3: Adjustments
This chapter contains checks and adjustments that ensure proper
performance of the power meter.
Chapter 4: Theory of Operation
This chapter describes how each of the power meter’s individual
assemblies operate.
Chapter 5: Replaceable Parts
This chapter details the power meter’s replaceable parts. It also explains
how to assemble and disassemble the power meter.
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About this Guide
xiv HP EPM-441A/442A Service Guide
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Table of Contents
Page
HP EPM-441A/442A Service Guide Contents-1
Legal Information ........................................................................ iii
Equipment Operation ................................................................... v
Personal Safety Considerations............................................. v
General Safety Considerations ............................................. vi
Markings ................................................................................ vi
IEC 1010-1 Compliance........................................................ vii
List of Related Publications ...................................................... viii
Sales and Service Offices ............................................................. ix
Returning Your Power Meter for Service............................ xii
About this Guide ........................................................................ xiii
Specifications....................................................................................... 1-1
Introduction................................................................................... 1-2
Power Meter Specifications .......................................................... 1-3
Meter ....................................................................................... 1-3
Accuracy.................................................................................. 1-4
Power Reference ..................................................................... 1-5
Power Meter Supplemental Characteristics ............................... 1-6
Power Reference ..................................................................... 1-6
Measurement Speed ............................................................... 1-6
Zero Drift of Sensors .............................................................. 1-7
Measurement Noise................................................................ 1-7
Settling Time .......................................................................... 1-9
Power Sensor Specifications .................................................. 1-12
General Characteristics................................................................ 1-13
Rear Panel Connectors........................................................... 1-13
Environmental Characteristics .................................................... 1-14
General Conditions................................................................. 1-14
Operating Environment ......................................................... 1-14
Storage Conditions ................................................................. 1-14
General .......................................................................................... 1-15
Dimensions ............................................................................. 1-15
Weight ..................................................................................... 1-15
Safety ...................................................................................... 1-15
Remote Programming ............................................................ 1-15
Non-Volatile Memory ............................................................. 1-16
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Contents-2 HP EPM-441A/442A Service Guide
Performance Tests .............................................................................. 2-1
Introduction................................................................................... 2-2
Equipment Required .............................................................. 2-3
Performance Test Record ....................................................... 2-4
Performance Tests.................................................................. 2-4
Calibration Cycle .................................................................... 2-4
Test Procedures ...................................................................... 2-4
Zero Test........................................................................................ 2-5
Specification........................................................................... 2-5
Description.............................................................................. 2-5
Equipment .............................................................................. 2-5
Test Setup ............................................................................... 2-5
Procedure ................................................................................ 2-6
Instrument Accuracy Test ............................................................ 2-7
Specification........................................................................... 2-7
Description.............................................................................. 2-7
Equipment .............................................................................. 2-7
Test Setup ............................................................................... 2-7
Procedure ................................................................................ 2-8
Power Reference Level Test ......................................................... 2-10
Description.............................................................................. 2-10
Equipment .............................................................................. 2-11
Test Setup ............................................................................... 2-11
Procedure ................................................................................ 2-11
HP E-Series Power Sensor Interface Test ................................... 2-14
Procedure ................................................................................ 2-14
HP E-Series Power Sensor Functional Test ................................ 2-15
Description.............................................................................. 2-15
Equipment .............................................................................. 2-15
Procedure ................................................................................ 2-16
Performance Test Record.............................................................. 2-18
Adjustments.......................................................................................... 3-1
Introduction................................................................................... 3-2
Safety Considerations ............................................................ 3-2
Equipment Required .............................................................. 3-3
Post-Repair Adjustments ....................................................... 3-3
Power Reference Oscillator Frequency Adjustment ................... 3-4
Description.............................................................................. 3-4
Equipment .............................................................................. 3-4
Procedure ................................................................................ 3-4
Power Reference Oscillator Level Adjustment............................ 3-6
Description.............................................................................. 3-6
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HP EPM-441A/442A Service Guide Contents-3
Equipment .............................................................................. 3-8
Procedure ................................................................................ 3-8
Measurement Uncertainty..................................................... 3-11
Display Brightness and Contrast Adjustment ............................ 3-12
Introduction ............................................................................ 3-12
Procedure ................................................................................ 3-12
Theory of Operation ........................................................................... 4-1
Introduction................................................................................... 4-2
A1 Power Supply........................................................................... 4-3
A2 Processor Assembly ................................................................. 4-4
A3 Front Panel Assembly ............................................................. 4-7
A4 Interface Assembly.................................................................. 4-8
A5 Daughter Assembly ................................................................. 4-9
A6 Measurement Assembly.......................................................... 4-10
Replaceable Parts ............................................................................... 5-1
Introduction................................................................................... 5-2
Assembly Part Numbers............................................................... 5-3
Front Panel Connector Repair ..................................................... 5-5
Firmware Upgrades ...................................................................... 5-6
Downloading Firmware.......................................................... 5-6
Assembly and Disassembly Guidelines ....................................... 5-7
Removing the Power Meter Cover ......................................... 5-7
Removing the A1 Power Supply Assembly ........................... 5-8
Removing the A2 Processor Assembly................................... 5-9
Removing the A4 Interface Assembly ................................... 5-10
Removing the A5 Daughter or A6 Measurement
Assemblies .............................................................................. 5-11
Removing the A7 Fan Assembly............................................ 5-12
Removing the Power Meter Battery (BT1)............................ 5-13
Removing the A3 Front Panel Assembly............................... 5-14
Replacing the Front Panel Power Reference Cable
Assembly ................................................................................. 5-17
Replacing the Rear Panel Power Sensor Cable
Assemblies (Options 002 and 003)......................................... 5-18
Replacing the Rear Panel Power Reference Cable
Assembly (Option 003) ........................................................... 5-20
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Contents-4 HP EPM-441A/442A Service Guide
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List of Figures
Page
HP EPM-441A/442A Service Guide Contents-5
2-1 Zero Test Setup.......................................................................... 2-5
2-2 Instrument Accuracy Test Setup .............................................. 2-7
2-3 Power Reference Level Test Setup ........................................... 2-11
2-4 Sensor Functional Test Setup ................................................... 2-16
2-5 Sensor Functional Test Setup with Attenuator ....................... 2-17
3-1 Adjustment Setup ...................................................................... 3-4
3-2 A2L9 Adjustment Location ....................................................... 3-5
3-3 Adjustment Setup ...................................................................... 3-6
3-4 A2R90 Adjustment Location ..................................................... 3-10
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Contents-6 HP EPM-441A/442A Service Guide
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