HP 400e schematic
TM 11-6625-1538-15
DEPARTMENT OF THE ARMY TECHNICAL MANUAL
OPERATOR, ORGANIZATIONAL, DS, GS, AND DEPOT
MAINTENANCE MANUAL
HEWLETT-PACKARD AC VOLTMETER AN/USM-265
(MODEL 400EL02) NSN 6625-00-935-4294
ME-459 (MODEL 400EL) NSN 6625-00-229-0457
ME-465 (MODEL 400E) NSN 6625-00-995-7716
This copy is a reprint which includes current
pages from Changes 1 and 2.
HEADQUARTERS, DEPARTMENT OF THE ARMY
MAY 1967
WARNING
DANGEROUS VOLTAGES
EXIST IN THIS EQUIPMENT
Be careful when working on the power supplies and
their circuits, or on the 230-or 115–volt ac line
connections.
DO NOT TAKE CHANCES!
TM 11-6625-1538-15
C2
CHANGE
HEADQUARTERS
DEPARTMENT OF THE ARMY
NO. 2
Washington, DC, 15 December 1983
OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT,
GENERAL SUPPORT, AND DEPOT MAINTENANCE
MANUAL FOR
HEWLETT-PACKARD AC VOLTMETER AN/USM-265
(MODEL 400EL02) NSN 6625-00-935-4294
ME-459 (MODEL 400EL) NSN 6625-00-229-0457
ME-465 (MODEL 400E) NSN 6625-00-995-7716
TM 11-6625-1538-15, 11 May 1987, is changed as follows:
1. New or added material is indicated by a vertical bar in the margin of the page.
2. Added or revised illustrations are indicated by a vertical bar adjacent to the illustration identification number.
3. Remove old pages and insert new pages as indicated below.
Remove Pages
Insert Pages
i and ii
10.1 and 10.2
5-1 and 5-2
4. File this change sheet in front of the publication for reference purposes.
i and ii
10.1/(10.2 blank)
5-1 through 5-2.2
A-1/(A-2 blank)
By Order of the Secretary of the Army:
Official:
ROBERT M. JOYCE
Major General, United States Army
The Adjutant General
DISTRIBUTION:
To be distributed in accordance with DA Form 12-34B, requirements for
TMDE.
JOHN A. WICKHAM JR.
General, United States Army
Chief of Staff
TM 11-6625-1538-15
C1
CHANGE
HEADQUARTERS
DEPARTMENT OF THE ARMY
No. 1
WASHINGTON,DC, 27 December 1979
Operator’s, Organizational, Direct Support,
General Support, and Depot Maintenance Manual
For
HEWLETT-PACKARD AC VOLTMETER AN/USM-265
(MODEL 400EL02) NSN 6625-00-935-4294
ME-459 (MODEL 400EL) NSN 6625-00-229-0457
ME-465 (MODEL 400E) NSN 6625-00-995-7716
TM 11-6625-1538-15, 11 May 1967, is changed as follows:
1. Title is changed as indicated above.
2. A vertical bar appears opposite changed material.
3. Remove and insert pages as indicated in the page list below:
Remove
iii and 1-0
None . . . . . . . . . . . . . . . . . . . . . . . . .
1-0.1
None . . . . . . . . . . . . . . . . . . . . . . .
4. File this change sheet in front of the manual for reference purposes.
By Order of the Secretary of the Army:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
Insert
i and ii
1-0
1-0.1 and 1-0.2
D-1 through D-4
Official:
J. C. PENNINGTON
Major General, United States Army
The Adjutant General
DISTRIBUTION:
Active Army:
HISA (Ft Monmouth) (21) Svc Colleges (1)
USAINSCOM (2) USASIGS (5)
COE (1) USAADS (2)
TSG (1)
USAARENBD (1) USAARMS (2)
DARCOM (1)
TRADOC (2)
OS Maj Comd (4) USAICS (3)
TECOM (2)
USACC (4)
MDW (1)
Armies (2)
Corps (2)
ARNG: None
USAR: None
For explanation of abbreviations used, see AR 310-50.
USAFAS (2)
USAIS (2)
USAES (2)
MAAG (1)
USARMIS (1)
USAERDAA (1)
USAERDAW (1)
Fort Gordon (10)
E. C. MEYER
General, United States Army
Chief of Staff
Fort Carson (5)
Army Dep (1) except
LBAD (14)
SAAD (30)
TOAD (14)
SHAD (3)
Fort Gillem (10)
USA Dep (1)
Sig Sec USA Dep (1)
Fort Richardson (CERCOM Ofc) (2)
Units org under fol TOE:
(2 copies each unit)
29-207
29-610
This manual contains copyrighted material orginally prepared by the Hewlett-Packard Company.
TM 11-6625-1538-15
TECHNICAL M ANUAL
HEADQUARTERS
DEPARTMENT OF THE ARMY
ASHINGTON , DC, 11 May 1967
TM 11-6625-1538-15
W
OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT,
GENERAL SUPPORT, AND DEPOT MAINTENANCE MANUAL
FOR
HEWLETT-PACKARD AC VOLTMETER AN/USM-265
(MODEL 400EL02) NSN 6625-00-935-4294
ME-459 (MODEL 400EL) NSN 6625-00-229-0457
ME-465 (MODEL 400E) NSN 6625-00-995-7716
SECTION I. GENERAL INFORMATION
ECTION II. INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
S
ECTION III. OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
S
ECTION IV. THEORY OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
S
SECTION
l-A.l. Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
lA.2. Consolidated index of Army publications and blank forms.... . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1A.3. Maintenance Forms, Records, and Reports
lA.4. Reporting Errors and Recommending Improvements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-A.5. Reporting Equipment Improvement Recommendations (EIR)
l-A.6. Administrative Storge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
l-A.7. Destruction of Army Electronics Materiel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1.
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4.
Options Available . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-5.
Option 01(400E only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-7.
0ption 02 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-9.
Instrument and manual Identification . . . . . . . . . . . . . . . . . . .
2-1.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-3.
Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-5. Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ,
2-7.
Grounding Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-10. Installation . . . . . . . .
2-12.
2-14.
2-16.
2-18. Repackaging for Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1.
3-4.
3-6. Operating Instructions
3-7.
3-12.
3-14.
4-1.
4-8.
4-9.
4-12.
4-15.
4-20.
4-22. Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bench Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rack Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Combination Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Location of Controls and Indicators . . . . . . . . . . . . .
Standard 400E/EL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
400E with Option 01 . . . . . . . . . . . . . .
400E/EL with Option02 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Schematic Description (See Figure 6-l) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Impedance Converter .
Meter Amplifier . . . .
Meter Bridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AC Output Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V. MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-1.
Introduction . . . . . . . . . . .
5-3.
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Page
1-0.1
1-0.1
1-0.1
1-0.1
1-0.1
1-0.1
1-0.1
1-1
1-1
1-1
1-1
1-1
2-1
2-1
2-1
2-1
2-1
2-1
2-1
2-1
2-1
2-1
3-1
3-1
3-1
3-1
3-1
3-2
3-2
4-1
4-1
4-1
4-1
4-2
4-2
4-2
4-2
5-1
5-1
5-1
Change 2
i
TM 11-6625-1538-15
5-4.1. Preventive Maintenance
5-4.2. Operator/Crew Preventive Maintenance Checks and Services
5-5.
Mechanical Zero Adjust (400E Only)
5-7.
Performance Checks Accuracy and Frequency Response Test . . . . . . . . . . . . . . . . . . . . . . . . .
5-19.
5-22. Alignment and Calibration Procedure . . . . . . .
5-24.
5-27.
5-29. AC Output Zero
5-31.
SECTION V.
ECTION VI.
S
APPENDIX A.
APPENDIX D.
SECTION I.
5-34. Troubleshooting
5-38. Power Supply
5-40.
5-46.
5-48. Adjustment of Factory Selected Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CIRCUIT DIAGRAMS
6-1.
Introduction
REFERENCES
MAINTENANCE ALLOCATION
INTRODUCTION
II.
MAINTENANCE ALLOCATION CHART FOR HEWLETT-PACKARD
AC VOLTMETER AN/USM-265, ME-459, and ME-465. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
III.
TOOL AND TEST EQUIPMENT REQUIREMENTS FOR HEWLETT-PACKARD AC
VOLTMETER AN/USM-265,ME-459, AND ME-465 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REMARKS (NOT APPLICABLE)
IV.
Chart
Input Impedance Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cover Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bias Adjust
Calibration
Amplifiers
AC Output Circuit
Page
5-1
5-2
5-2
5-2
5-3
5-4
5-4
5-4
5-4
5-4
5-5
5-6
5-6
5-6
57
6-1
6-1
A-1
D-1
D-3
D-4
Number
1-1.
3-1.
3-2.
5-1.
5-2.
5-3.
5-4.
5-5.
5-6.
5-7. Impedance Converter Voltages
5-8.
5-9.
5-10.
Figure
1-1.
3-1.
3-2.
3-3.
4-1.
4-2.
5-1.
5-2.
5-3.
6-1.
6-2.
Specifications
Effect of Distortion on Average Responding Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AC Amplifier Gain
Required Test Equipment
Calibration Tolerances
l/3 Scale Tracking Tolerances (400E)
l/3 Scale Tracking Tolerances (4WEL)
Troubleshooting Guide
Power Supply Voltages
Meter Amplifier Voltages
AC Voltage Output Circuit
Factory Selected Components
Models 400E and 400EL AC Voltmeter
Location of Controls and Indicators
External Battery Connedion
Impedance Correction Graph
Simplified Block Diagram
Meter Bridge
Accuracy and Frequency Response Test Setup
Input Impedance Check
Location of Internal Adjustments
400E/EL Schematic Diagram and Location of Compnents
Location of Important Mechanical Parts
LIST OF TABLES
LIST OF ILLUSTRATIONS
Page
1-0
3-1
3-2
5-0
5-3
5-3
5-4
5-6
5-6
5-6
5-6
5-6
5-7
Page
1-0
3-0
3-1
3-3
4-1
4-2
5-2.1
5-4
5-5
6-3
6-4
ii
Change 2
TM 11-6625-1538-15
Section I
Figure 1-1 and Table 1-1
FIGURE l–l.
-hp- MODEL 400E/EL
Voltage Range:
in 12 ranges in 1, 3, 10 sequence. value for a step change.
-72 dbm to +52 dbm in 12 ranges with 10 dbm
between ranges. AC Power:
Frequency Range: 10 Hz to 10 MHz.
Calibration: Responds to absolute average value of
applied signal, calibrated in rms volts.
Input Impedance:
the 1 mv-1 v ranges and 10 megohms shunted by
8 pf on the 3 v-300 v ranges.
Amplifier AC Output: 150 mv rms for full scale
meter indication; output impedance 50 ohms, 10
Hz to 10 MHz (105 mv on the 1 mv range).
AC-DC Converter Output: 1 vdc output for full scale Shipping: 9 lbs. (4 kg).
meter deflection.
Output Resistance: 1000 ohms.
1 mv full scale to 300 v full scale
10 megohms shunted by 21 pf on
MODELS 400E AND 400EL AC VOLTMETERS
Table 1-1. Specifications
-hp- MODEL 400E/EL (Cont’d)
Response Time: 1 second to within 1% of final
approximately 5 watts.
Temperature Range: 0 to +55°C (except where noted
on accuracy charts).
External Battery Operation: Terminals are provided
on rear panel; positive and negative voltages between 35 v and 55 v are required; current drain
from each voltage is approximately 54 ma.
Weight:
Net: 6 lbs. (2, 7 kg).
Dimensions:
(165, 1 x 130,2 x 279,4 mm).
115 or 230 volts +10%, 50 to 1000 cps,
6-1/2” high, 5-1/8” wide, 11” deep
EL6625—1538—TM—CI—I
1-0
01788-1
SECTION I
GENERAL INFORMATION
TM 11-6625-1538-15
1-A.1. SCOPE
This manual includes installation and operation
instruction and covers operator‘s, organizational,
direct support (DS), general support (GS), and
depot maintenance of the Hewlett-Packard AC
Voltmeter AN/USM-265 (Model 400EL02), ME-459
(Model 400EL), and ME-465 (Model 400E). The
repair parts and special tools list are located in
TM 11-6625-1538-24P.
1-A.2. CONSOLIDATED INDEX OF ARMY
PUBLICATIONS AND BLANK FORMS
Refer to the 1 test issue of DA Pam 310-1 to deter-
mine whether there are new editions, changed or
additional publications pertaining to the equipment.
MAINTENANCE FORMS, RECORDS,
1-A.3.
AND REPORTS
Reports of Maintenance and Unsatisfactory
a.
Equipment. Department of the Army forms
and procedures used for equipment maintenance will be those prescribed by TM
38-750, The Army Maintenance Management System.
Report of Packaging and Handling Defi-
b.
ciencies,
(Report of Discrepancy (ROD)) as prescribed in AR 735-11-2/DLAR 4140.55/
NAVMATINST 4355.73A/AFR 400-54/
MCO 430.3F.
c.
Discrepancy in Shipment Report (DISREP)
(SF 361). Fill out and forward Discrepancy
in Shipment Report (DISREP) (SF 361) as
prescribed in AR 55-38/NAVSUPINST
4610.33C/AFR 75-18/MCO P4610.19D/
DLAR 4500.15.
1-A.4.
REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS
You can help improve this manual. If you find any
mistakes or if you know of a way to improve the
Fill out and forward SF 364
procedures, please let us know. Mail your letter or
DA Form 2028 (Recommended Changes to Publications and Blank Forms) direct to: Commander,
US Army Communications-Electronics Command
and Fort Monmouth, ATTN: DRSEL-ME-MP,
Fort Monmouth, New Jersey 07703.
In either case, a reply will be furnished direct to
you.
1-A.5. REPORTING EQUIPMENT IMPROVEMENT
RECOMMENDATIONS (EIR)
If your AC Voltmeter AN/USM-265 needs improvement, let us know. Send us an EIR. You, the user,
are the only one who can tell us what you don’t like
about your equipment. Let us know why you don‘t
like the design.
Deficiency Report). Mail it to Commander, US
Army Communications-Electronics Command and
Fort Monmouth, ATTN: DRSEL-ME-MP, Fort
Monmouth, New Jersey 07703. We’ll send you a
reply.
1-A.6. ADMINISTRATIVE STORAGE
Administrative Storage of Equipment issued to and
used by Army activities will have preventive maintenance performed in accordance with the PMCS
charts before storing. When removing the equipment from administrative storage the PMCS should
be performed to assure operational readiness. Disassembly and repacking of equipment for shipment
or limited storage are covered in paragraphs 2-18
through 2-21, and TM 740-90-1 Administrative
Storage of Equipment.
1-A.7. DESTRUCTION OF ARMY ELECTRONICS
MATERIEL
Destruction of Army electronics materiel to prevent
enemy use shall be in accordance with TM
750-244-2.
Put it on an SF 368 (Quality
Change 2
1-0.1/(1-0.2 blank)
TM 11-6625-1538-15
Model 400E/EL
In this manual, the international standard unit of frequency,
the Hertz, will be used rather than cycles per second.
1 Hertz (Hz) = 1 cycle per second
1-1. DESCRIPTION.
1-2. The -hp- Models 400E and 400EL are versatile
ac voltmeters and db meters. Both models can be
used as ac to dc converters or wideband amplifiers.
The Model 400E is primarily intended for voltage
measurements, whereas the Model 400EL is primarily
a db meter. However, both meters indicate both volts
and db. The 400E has a linear ac scale with a logarithmic db scale underneath, and the 400EL has a
linear db scale with a logarithmic ac scale underneath.
Since the difference in scales is the only difference
between the two instruments, this manual will use the
term 400E/EL in reference to both instruments.
1-3. Figure 1-1 shows both the Model 400E and the
Model 400EL. Table 1-1 is a list of specifications.
Paragraphs 1-1 to 1-11 and Table 1-1 (Cont’d)
NOTE
1-7. OPTION 02.
1-8. Option 02 adds a relative reference adjustment
to the 400E/EL. The REL. REF. control allows a continuous reduction in sensitivity by a maximum of 3
db in order to make relative voltage or db measurements.
1-9. INSTRUMENT AND MANUAL
IDENTIFICATION.
1-10. Hewlett-Packard instruments are identified by
a two-section, eight-digit serial number (000-00000).
Section I
1-4. OPTIONS AVAILABLE.
1-5. OPTION 01 (400E Only).
1-6. Option 01 places the db scale uppermost for
greater resolution when making db measurements.
Table 1-1. Specifications (Cent’d)
1-11. If the first three digits of the two-section, eight-
digit serial number are prefixed with an E or G, your
instrument was produced in Europe. An E000-00000
serial number indicates that the instrument was manufactured in England; a G000-00000 serial number indicates that the instrument was manufactured in Germany.
01788-1
1-1
TM 11-6625-1538-15
Section 1
Table 1-1 (Cont’d)
Table 1-1. Specifications (Cont‘d)
1-2
Model 400E/EL
TM 11-6625-1538-15
Section II
Paragraphs 2-1 to 2-21
SECTION II
INSTALLATION
2-1. INTRODUCTION.
2-2. This section contains information and instructions necessary for the installation and shipping of the
Model 400E and 400EL voltmeters. Included are initial inspection procedures, power and grounding requirements, installation information, and instructions
for repackaging for shipment.
2-3. INITIAL INSPECTION.
2-4. This instrument was carefully inspected both
mechanically and electrically before shipment. It
should be physically free of mars or scratches and in
perfect electrical order upon receipt. To confirm
this, the instrument should be inspected for physical
damage in transit. Also check for supplied accessories,
and test the electrical performance of the instrument
using the procedure outlined in Paragraph 5-7.
Report any damage or deficiencies in
accordance with paragraph
1-A. 3.
2-5. POWER REQUIREMENTS.
2-6. The Model 400E/EL can be operated from any
source of 115 or 230 volts at 50 to 1000 cycles or from
two 35 to 55 volt batteries connected to the rear panel
BATTERY terminals.
the rear panel selects the desired line voltage. Power
dissipation is 5 watts maximum.
The 115/230 v slide switch on
2-7. GROUNDING REQUIREMENTS.
2-8. To protect operating personnel, the National
Electrical Manufacturers’ Association (NEMA) recom-
mends that the instrument panel and cabinet be
grounded. All Hewlett- Packard instruments are
equipped with a three-conductor power cable which,
when plugged into an appropriate receptacle, grounds
the instrument.
three-prong connector is the ground wire.
2-9. To preserve the protection feature when operating the instrument from a two-contact outlet, use a
three-prong to two-prong adapter and connect the
green pigtail on the adapter to ground.
The offset pin on the power cable
2-10. INSTALLATION.
2-11. The Model 400E/EL is fully transistorized;
therefore, no special cooling is required. However,
the instrument should not be operated where the
ambient temperature exceeds 55°C (131°F) or the
relative humidity exceeds 95%.
2-12. BENCH MOUNTING.
2-13. The Model 400E/EL is shipped with plastic feet
and tilt stand in place, ready for use as a bench instrument.
2-14. RACK MOUNTING.
2-15. The Model 400E/EL may be rack mounted by
using an adapter frame (-hp- Part No. 5060-0797).
01788-1
The adapter
combination
mounted only.
2-16. COMBINATION MOUNTING.
2-17. The Model 400E/EL may be mounted in combi-
nation with other submodular units by using a Combining Case (-hp- Model 1051A or 1052A). The Combining Case is a full-module unit which accepts various
combinations of submodular units. Being a full- module
unit, the combining case can be bench or rack mounted
and is analogous to any full-module instrument.
2-18. REPACKAGING FOR SHIPMENT.
2-l9. The following paragraphs contain a
general guide for repackaging of the
equipment.
original container is to be used;
paragraph 2-21 if it is not.
2-20. If
follows:
a.
b.
2-21, If
as follows:
a.
b.
c.
d.
frame is a rack frame that accepts any
of submodular units. It can be rack
Refer to paragraph 2-20 if the
original container is to be used, proceed as
Place equipment in original container.
Make sure that container is well
sealed with strong tape or metal bands.
original container is not to be used, proceed
Wrap instrument in heavy paper or plastic before placing in an inner container.
Place packing material around all sides of
instrument and protect panel face with cardboard strips.
Place instrument and inner container in a
heavy carton or wooden box and seal with
strong tape or metal bands.
Mark shipping container with “DELICATE
INSTRUMENT,” “FRAGILE” etc.
2-1
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