HP 410C Operation
E
— Service
Model 410C
Electronic Voltmeter
7] Paciano
OPERATING AND SERVICE MANUAL
MODEL 410C
ELECTRONIC VOLTMETER
Serials Numbers: 0982A22339 and Above
NOTICE
For those instruments with serial numbers 0982A22338 and
below, refer to Manual Part No. 00410-50007,
WARNING )
To help minimize the possibility of electrical fire
or shock hazards, do not expose this instrument
to rain or excessive moisture,
Manual Part No. 00410-90609
Microfiche Part No. 00410-90059
©Copyright Hewlett-Packard Company 1981
Р.О. Вох 301, Loveland, Colorado, 80537 U.S.A,
Printed: March 1981
Ur HEWLETT
PACKARD
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 Na-
tional Bureau of Standards, to the extent allowed by the Bureau's calibration facility, and to the calibration facilities
of other International Standards Organization members.
WARRANTY
This Hewlett-Packard product is warranted against defects in material and workmanship for a period of one year
from date of shipment [,except that in the case of certain components listed in Section I of this manual, the warranty
shail be for the specified period] . 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 to return the product to Buyer. However, Buyer
shall pay all shipping charges, duties, and taxes for products returned to -hp- from another country.
Hewlett-Packard 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. Hewlett-Packard does not warrant that the
operation of the instrument, or software, or firmware will be uninterrupted or error free.
LIMITATION OF WARRANTY
The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer,
Buyer-suppilied 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. HEWLETT-PACKARD 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. HEWLETT.
PACKARD SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSE.
QUENTIAL DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.
ASSISTANCE
Product maintenance agreements and other customer assistance agreements are available
Jor Hewlett-Packard products.
For any assistance, contact your nearest Hewlett-Packard Sales and Service Office.
Addresses are provided at the back of this manual. |
10/1/P
TABLE OF CONTENTS
Section Page
I. GENERAL INFORMATION.............. 1-1
1-1, Description ............ eae a a 1-1
1-4. Instrument and Manual Identification. . 1-1
1-7. Accessories Available. ................ 1-1
1-9. Model 11036A ACProbe............. 1-1
1-11. Model 11040A Capacity Divider....... 1.1
1-13. Model 11042A Probe T Connector.....1-l
1-15. Model 11043A Type N Connector, .... 1-1
1-17. Model 11045A DC Divider... ......... 1-1
Section Page
II. INSTALLATION er a eue ue 2-1
2-1.. Inspection «vi cir AA 2-1
2-3, Installation ....... iii, 2-1
2-5. Rack Mounting.........e.0e-e. era. 2-1
2-7. Models 1051A and 1052A Combining
CaSES 2.112.120 02 44 4e ea dau sen au» 2-1
2-9. Rack Adapter Frame (-hp- Part
| Number 5060-6762). ............... 2-1
2-11. Three-conductor Power Cabie......... 2-2
2-13. Primary Power Requirements.......... 2-2
2-15. Repacking for Shipment............. 2-3
Section Page
HI, OPERATING INSTRUCTIONS. .......... „3-1
/ 3-1, introduction ......... .e.eeceerenerames 3-1
3-4. Front and Rear Panel Description... ... 3.1
3-6. Operating Procedures. ............... 3-1
3-8. DC Voltage Measurements. .......... 3-1
3-10 DC Current Measurements. .......... 3-2
3-12, Measuring DC Nano-Ampere |
| CUITents,...._resrcceroceroverrerz. 3-2
3-14. Resistance Measurements............ 3-2
3-17. AC Voltage Measurements
(Figure 3-6).........0050rmie re... 3.2
3-19. Precautions When Measuring AC
VOHAEE. crn erences canes 3-3
3-30. Pulse Measurements.......¿.ssecxeoo 3-5
3-32. Negative Pulses........e.r0sesecice. 3-6
Section Page
IV. THEORY OF OPERATION............... 4-1
4-1. General Description (Figure 4-1). ....... 4.1
4-4, Circuit Description. .................. 4-1
4-5, Input Switching and Attenuator....... 4-]
4-7. Amplifier (Figure 5-8). .............. 4-1
4.20. The Feedback Network.............. 4-2
4-24. Power Supply. ...........emeseveeo 4-2
Section Page
Y. MAINTENANCE ........escorerorrera.. 5-1
$-1. Introduction ..........e.- reversa . 3-1
5-3. Test Equipment Required. ............ 5.1
5-5. Performance Tests................... 5-1
3-7, Mechanical Meter Zero... 5-2
5-8. DC Voltmeter Operation. ............5-2
5-11. DC Ammeter Operation............. 5-3
5-13, Ohmmeter Operation........ee...—... 5-3
5-15. Amplifier Operation. ................ 5-3
5-22. AC Voltmeter Operation. ..... eee 5-5
5-26. Adjustment and Calibration Procedure. .3-6
5-29, Power Supply Test. ..........—.—esree. 5.7
5-30, Amplifier Current Adiustment........ 5-7
5-31. DC Voltmeter Calibration............. 3-7
5-32. DC Zero Adjustment. ............e... 5-7
5-33. DC Full Scale Adjust................ 5.7
5-34. Ohmmeter Calibration............... 5-8
5-35. Amplifier Output Calibration. ........ 3-8
5-36, AC Volimeter Calibration............. 5.8
5-38. AC Zero Adjust. .....e..e.seoacrea. 5-8
5.39. AC Full Scale Adjust.........coere.. 5.8
5-40. Troubleshooting ............... 5-9/5-10
5.43, Power Supply Troubleshooting. ..5-9/5-10
5-45. Amplifier Troubleshooting...... 5-9/5-10
5-47. Schematic Diagrams............. 5-9/5-10
Section Page
Vi. REPLACEABLE PARTS......... Venere 6-1
6-1. Introduction ................. Cee 6-1
6-4. Ordering Information................ 6-1
6-6. Non-Listed Par, ....000000001 00000 6-1
Mi
TABLE OF CONTENTS (Cont'd
LIST OF TABLES
Table Page
1-1. Specifications. ............... Re 1-2
3-1. Possible Error when Measuring Voltage
of Complex Waveforms. ................ 3-3
5-1. Recommended Test Equipment, ............ 5-1
5-2. DCY Accuracy Test................ .. .... 5-2
5-3. DCV Input Resistance Test.............,...53
3-4. DCA Accuracy Test. ..............e.e side. 5-3
5-5, AC Accuracy Test. ......... ere. 5-5
3-6. Power Supply Test. ....................... 5-7
5-7. DCV Calibration Procedure. ............... 5-8
5-8. ACFull Scale Adjust. ................ 5-9/ 5-10
6-1. Standard Abreviations..................... 6-1
6-2. Code List of Manufacturers. ............... 6-2
6-3. Replaceable Parts. ........................ 6-3
LIST OF ILLUSTRATIONS
Figure Page Figure Page
2-1. The Combining Case...................... 2-1 5-4. Adjustment Locations..................... 5-7
2-2. Steps to Place Instrument in Combining 5-5. A3 Board Adjustment Locations. ........... 5.8
Case..........oocoiiiiil, sree 22 5.6. Power Supply Measurements. ........ $-11/5-12
2-3, Adapter Frame instrument Combination. .... 2-2 5-7. Power Supply Schematic. ............ 5.11/5-12
2-4. Two Half Modules in Rack Adapter......... 23 5.8, Amplifier Schematic..................... 5.13
3-1. Front and Rear Panel Controls.............. 3-0 5-9. Model 11036A AC Probe (Exploded
3-2. DC Voltage Measurements,................ 3-1 A Le Lana aan ea ana nana 5-14
3-3. DC Current Measurements................. 32 5.10. Model 11036A AC Probe Schematic. ....... 5-14
3-4. DC Nano-Ampere Current Measure- 5-11. Range and Function Switching
PT A E AA 3-3 (Pictorial).............eceemreeieeeres 5-15
3-5. Resistance Measurements.................. 3-4 5-12. Input Range and Function Switching
3-6. AC Voltage Measurements... ............ 3.5 SChemAatic «ooo eee ee riera, 5.16
3-7. Maximum AC Voltage Chart For 5-13. Simplified Schematic, DC Current
H036A AC Probe...................... 3-6 Measurement. ......e.eeceesrdorcoas 3-17/3-18
3-8. Graph Used In Calculations Of Pulse 5-14. Simplified Schematic, DC Voltage
Voltage Readings................... 3-7/3-8 Measurement..........remeemveeos 5-19/5-20
4-1, Block Diagram, Model 410C............... 4-1 5-15. Simplified Schematic, Resistance |
5-1. DC Ammeter Operation. .................. 5-2 Measurement ...............eñoÑem.. 5.21/5-22
3-2. Low Frequency Response Test.............. 3-3 5.16. Simplified Schematic, AC Voltage
5-3. High Frequency Response Test. ............. 5-6 Measurement... 5-23/5-24
iv
HEWLETT
г PACKARD
SAFETY SUMMARY
The following general safety precautions must be observed during all phases of operation, service, and repair of this
instrument. Failura to comply with these precautions or with specific warnings elsewhere in this manual violates
safety standards of design, manufacture, and intended use of the instrument. Hewlett-Packard Company assumes no
liability for the customer's failurs to comply with these requirements. This is a Safety Class 1 instrument.
GROUND THE INSTRUMENT
To minimize shock hazard, the instrument chassis and cabinet must be connected to an elec-
trical ground. The instrument is equipped with a three-conductor ac power cable. The power
cable must either be plugged into an approved three-contact electrical outlet or used with a
three-contact to two-contact adapter with the grounding wire (green) firmly connected to an
electrical ground (safety ground} at the power outlet. The power jack and mating plug of the
power cable meet International Electrotechnical Commission (IEC) safety standards.
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE
Do not operate the instrument in the presence of flammable gases or fumes, Operation of any
electrical instrument in such an environment constitutes a definite safety hazard.
KEEP AWAY FROM LIVE CIRCUITS
Operating personnel must not remove instrument covers. Component replacement and internal
adjustments must be made by qualified maintenance personnel. Do not replace components
with power cable connected. Under certain conditions, dangerous voltages may exist even with
the power cable removed. To avoid injuries, always disconnect power and discharge circuits
before touching them.
DO NOT SERVICE OR ADJUST ALONE
Do not attempt internal service or adjustment unless another person, capable of rendering first
aid and resuscitation, is present.
~ DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT
Because of the danger of introducing additional hazards, do not install substitute parts or per-
form any unauthorized modification to the instrument. Return the instrument to a Hewlett-
Packard Sales and Service Office for service and repair to ensure that safety features are main-
tained. |
DANGEROUS PROCEDURE WARNINGS
Warnings, such as the example below, precede potentially dangerous procedures throughout
this manual. Instructions contained in the warnings must be followed.
| WARNING |
Dangsrous voltages, capable of causing death, are present in this instrument, Usa ex-
tremg caution when handling, testing, and adjusting.
SAFETY SYMBOLS
General Definitions of Safety Symbols Used On Equipment or In Manuals.
и
Bb ® = >
77 % ade
| ¢
|
| WARNING
ÉCAUTION
NOTE:
Instruction manual symbol; the product will be marked with this
symbol when it is necessary for the user to refer to the instruction
manual in order to protect against damage to the instrument.
Indicates dangerous voltage (terminals fed from the interior by
voltage exceeding 1000 volts must be so marked).
Protective conductor terminal. For protection against electrical
shock in case of a fault. Used with field wiring terminals to in-
dicate the terminal which must be connected to ground before
operating equipment.
Low-noise or noiseless, clean ground (earth) terminal. Used for a
signal common, as well as providing protection against electrical
shock in case of a fault. A terminal marked with this symbol must
be connected to ground in the manner described in the installation
(operating) manual, and before operating the equipment,
Frame or chassis terminal. A connection to the frame (chassis) of
the equipment which normally includes all exposed metal struc-
tures. |
Alternating current (power line).
Direct current (power line).
Alternating or direct current (power line).
The WARNING sign denotes a hazard. It calls attention to a pro-
cedure, practice, condition or the like, which, if not correctly per-
formed or adhered to, could result in injury or death to personnel.
The CAUTION sign denotes a hazard. It calls attention to an
operating procedure, practice, condition or the like, which,if not
correctly performed or adhered to, could resuit in damage to or
destruction of part or all of the product. |
The NOTE sign denotes important information, It calls attention
to procedure, practice, condition or the like, which is essential to
highlight,
— SECTION |
GENERAL INFORMATION
1-1. DESCRIPTION.
1-2, The Hewlett-Packard Model 410€ Electronic
Voltmeter can be used to measure de voltage, de cur-
rent, ac voltage, and resistance. Positive and negative de
voltages from 15 mV to 1500 V full scale and positive
and negative dec currents from 1.5 pA to 150 mA full
scale can be measured. Resistance from 10 2 to 10 MO
mid-scale can be measured with an accuracy of + 5%;
resistance from 0.2 © to 500 MN can be measured with
reduced accuracy. The Model 410C Electronic
Voltmeter specifications are given in Table 1-1.
1-3. With the Model 11036A detachable AC Probe, the
Voltmeter can be used to measure ac voltage from 20 Hz
to 700 MHz. AC Voltages from 0.5 to 300 V can be
measured in the 20 Hz to 100 MHz range. Refer to
Figure 3-5 for maximum voltage that can be applied to
the AC Probe for the 100 MHz to 700 MHz range, For
additional information on the AC Probe, refer to
Paragraph 1-9,
1-4. INSTRUMENT AND MANUAL IDENTIFICATION.
1-5, Hewlett-Packard uses a two-section serial number
consisting of a digit prefix and a five-digit suffix. The
prefix and suffix are separated by a letter designating
the country in which the instrument was manufactured.
(A = U.S.A; G = Germany; J = Japan; U = United
Kingdom.) |
1-6, This manual applies to instruments with the serial
prefix indicated on the titie page. If changes have been
made in the instrument since the printing of this
manual, a “Manual Changes” supplement supplied
with the manual will define these changes. Be sure to
record these changes in your manual, Backdating infor-
mation located in Appendix C adapts the manual to in-
struments manufactured prior to this printing. The
manual part number is indicated on the title page.
1-7. ACCESSORIES AVAILABLE.
1-8, Accessories are available that extend the ac and de
measuring capabilities of the Voitmeter. A description
of these accessories and their specifications is given
below. -
1-9, Model 110364 AC Probe.
1-10. This accessory, when used with the Model 410C,
permits ac voltage measurements over a frequency range
of 20 Hz to 700 MHz, Refer to Figure 3-5 for the max-
imum RMS voltages that can be applied to the AC Pro-
be in this frequency range. Reference calibration ac-
curacy at 400 Hz (sinusoidal) is + 3% of full scale. Fre-
quency response is + 10% from 20 Hz to 700 MHz,
with indications obtainable to 3000 MHz. Frequency
response at 100 MHz is within + .2%. The Model
11036A responds to the positive-peak-above-average
value of the signal applied. The Model 410C is
calibrated to read in RMS volts, for sine wave inputs.
1-11. Model 11040A Capacity Divider.
1-12. This accessory (formerly the Model 453A) extends
the ac voltage range of the Voltmeter to 2000 Y rms,
The divider is for use at frequencies above 10 kHz,
Voltage division is 100:1 + 1%, and input capacity is
approximately 2 pF.
1.13. Model 11042A Probe T Connector.
1-14. This accessory (formerly the Model 455A) is used
for connecting the Model 11036A Probe across & 50 9
transmission line using type N connectors. The T joint is
such that connection of the probe into a transmission
line will not cause a standing wave ratio greater than 1.1
at 500 MHz and 1.2 at 1000 MHz. With this device,
measurement of power traveling through a transmission
line may be made with reasonable accuracy to 1000
MHz. The usual precautions must be taken to provide
accurate impedance matching and the elimination of
standing waves along the line through which power is
floating. By using a dummy load at the receiving end of
this T joint power output of various devices can be
‘measured. In many applications power going into a real
load, such as an antenna, can be conveniently measured
up to 1000 MHz with good accuracy.
1-15. Mode! 11043A Typs N Connector.
1-16. This accessory (formerly the Model 458A) allows
the AC Probe to be connected to a 50 {} coaxial line, The
connector uses a male type N connector and a receptacle
for receiving the probe. Terminating resistor is not in-
cluded.
1-17. Model 11045A DC Divider.
1-18. This accessory extends the maximum de voitage
range of the Model! 410C to 30 kV. Voitage division is
100:1, + 5%, and input resistance is 9900 M2. When
1-1
General Information Model 410C
used with the Model 410C input resistance is 10,000 MQ. measuring high voltages such as in television equipment,
This probe offers maximum safety and convenience for etc. The maximum current drain 1s 2.5 gA. | |
Tabls 1-1. Specifications.
DC VOLTMETER
Voltage Ranges: 15 mV to + 1500 Y fuil scale in 0.5,
1.5, 5 sequence (11 ranges).
Accuracy: + 2% of full scale on any range,
Input Resistance: 100 MQ + 1% of 500 mV range and
sbove. 10 M2 + 3% on 15 mV, 50 mV, and 150 mV
ranges.
OC AMMETER
Current Ranges: + 1.5uA to + 159 mA fullscalein 1.5,
6 sequence (11 ranges}.
Accuracy: + 3% of fuil scale on any range.
Input Resistance: Decreasing from 2 kil on 1.5 uA scale
to approximately 0.3 0 on the 150 mA scale.
, Special Current Ranges: + 1.5, # 5, + 158 nancamps
may be measured on the 15, 50, end 150 гай мой
ranges using the voltmeter probe, with + 5% accuracy
and 10 MO input resistance.
CHMMETER
Resistance Range: Resistance from 10 Q to 10 MO cantar
scala {7 ranges).
Accuracy: Zero to midscale: + 5% of reading or £ 2%
of midscale, whichever is greater,
+ 7% of reading from midscale vaius of 2.
+ 8% of repding from scaia value of 2 to 3.
+ 9% of reading from scale value of 3 to 5.
+ 10% of reading from scale value of 5 to 10.
AMPLIFIER
Voltage Gein: 100 maximum,
AC Rejection: 3 dB at Y Hz; approximately 88 de at
BG Hz and higher freguancies for gignais less than
1600 V peak or 30 times full scale, whichever is
smaller,
Isolation: impedance between common and chassis is
> 10 MQ in parailel with 0.1 gF, Common maybe
floated up to 400 V dc above chassis for de and resis-
tance measurements.
Output: Proportional to meter indication; 1.5 V do at full
scale, maximum current, 1 má,
Output impedance: Less than 3 9 at de,
Noise: Less than 0.5% cof full scale on any range {p - pl.
DC Drift: Less than 0.5% of full scale/yesr at constant
temperature. Lass than 05% of full scale/°C.
Overload Recovery: Recover from 100:1 суепова п < 3
sec.
AC VOLTMETER
Ranges: 0.5 V full scale to 300 V in 0.5, 1.5, 5 sequence
{7 ranges).
Accuracy: + 3% of full scale at 400 Hz for sinusoidal
voltages from C.5 10 300 V rms. Tha AC Probe responds
to the positive pesk-abova-avarags value of the appliad
signal.
Frequency Response: + 2% from 100 Hz to 50 MHz
(400 Hz ref.), + 4% from 50 MHz to 100 MHz + 10%
from 20 Hz to 100 Hz and + 1.5 dB from 100 MHz to
to 700 MHz.
Frequency Range: 20 Hz to 700 MHz.
input impedance: Input capacity 1,5 pF, input resistance
> 10 MQ at iow frequencies, At high fraquancies impe-
dance drops off due to dielectric loss.
Safety: The probe body is grounded to chassis in the AC
Function for safety. All ac measurements are referenced
to chassis ground.
Meter: Individually calibrated taut band meter, Responds
to positive pesk-above-aversge. Calibrated in rms volts
for sine wave input.
GENERAL
Maximurs Input: (see Overicad Recovery)
DC: 100 V on 15, 50 and 150 mV ranges; 500 V on
0.5 to 15 V rangas; 1800 V on higher ranges.
AC: 100 times fulf scale or 450 V peak, whichever is
less,
Power: 115 or 230 V + 10%. 48 to 440 Hz, 10 watts
{17 watts with 110364 AC Probe),
Dimensions: 6% in. high (18.5 cm); 5 1/8 in. wide
{12.01 cm}; 11 in. deep {27.9 cm) behing panel. Fits
5060-0797 Rack Adapter and 1050 series combining
cases.
Weight:
Net: 7.5 lbs. (3,4 kg)
Shipping: approximately 14.5 iba, (6.58 kgl
Accessories Furnished: Detachable power cord, NEMA
plug; -hp- Model 110368A AC Probe,
Option 007: -hp- Madel 410€ less AC Probe.
— SECTION It
INSTALLATION
2-1. INSPECTION.
2-2. 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 5-5, Performance
Tests. If there is damage or deficiency, see the warranty
on the page following the title page of this manual.
2.3. INSTALLATION.
2-4. The -hp- Model 410C is solid state and requires no
special cooling. However, the instrument shouid not be
operated where the ambient temperature exceeds 55°C
(1409).
2-5. RACK MOUNTING.
2-6. The Model 410C is a submodular unit designed for
bench use. However, when used in combination with
other submodular units, it can be bench and/or rack
mounted. The -hp- Combining Cases and Adapter
Frame are designed specifically for this purpose.
2-7. Models 1051A and 1052A Combining Cases.
2-8. The Combining Cases are full-module units which
accept various combinations of submodular units. Be-
ing a full width unit, it can either be bench or rack
mounted. An illustration of the Combining Case is
shown in Figure 2-1. Instructions for installing the
Model 410C are shown in Figure 2-2.
2-3. Rack Adapter Frame (-hp- Part Number 5060-8762).
2-10. The adapter frame is a rack mounting frame that
accepts various combinations of submodular units. It
can be rack mounted only. An illustration of the
adapter frame is given in Figure 2-3. Instructions are
given below.
a. Place the adapter frame on edge of bench as
shown in step 1, Figure 2-4.
DIVIDER LATCH
2048-5164
DIVIDER ASSEMBLY °
SUBMODULE RETAINER
Figure 2-1. Ths Combining Case.
Installation
Model 410€
ster (1)
SLIDE TOP PART
TO LIMIT
step (2)
SLIDE BOTTOM PART
TO LIMIT
step (©)
BUSH IN TG LIMIT
srer (@)
SLIDE OVER TO LIMIT c= pul e |
PUSH OCWN
TO RELEASE
STEP (O)
PLACE INSTRUMENT
INTO CASE
sree (7)
SET RETAINER BACK
INTO PLACE
STEP
PUSH UP TO LOCK
Figura 2-2. Steps to Place Instrument in Combining Case.
b. Stack the submodular units in the frame as shown
in step 2, Figure 2-4. Place the spacer clamps between
instruments as shown in step 3., Figure 2-4.
c. Place spacer clamps on the two end instruments
(see step 4, Figure 2-4) and push the combination into
the frame.
d. Insert screws on either side of frame, and tighten
until submodular instruments are tight in the frame,
e. The complete assembiy is ready for rack moun-
ting.
2-11, THREE-CONDUCTOR POWER CABLE.
| WARNING }
То protect operating personnel from electric
shock, the National Electrical Manufac-
turer's Association (NEMA) recommends
that the instrument panel and cabinet be
grounded. All Hewlett-Packard instruments
are equipped with a three conductor power
cable which grounds the instrument when
plugged into an appropriate receptacie,
2-12. To preserve the protection feature when operating
the instrument from a two-contact outlet, use three-
prong to two-prong adapter and connect the green
pigtail on the adapter to an adequate ground.
2-2
oa FILLER PANEL o]
400
t : 1
E 4 1
Figure 2-3. Adapter Frame Instrument Combination.
2.13. PRIMARY POWER REQUIREMENTS.
2-14, The Model 410C can be operated from either 115
or 230 Y, 48 to 440 Hz. The instrument can be easily
converted from 115 to 230 Y operation. The SELEC-
TOR switch, S2 à two-position slide switch located at
the rear of the instrument, selects the mode of ac opera-
tion. The line voltage from which the instrument is set
Mode; 410C
to operate appears on the slider of the switch, A 0.25
ampere, slo-blo fuse is used for both 115 and 230 Y
operation. |
©
ADAPTER
FRAME
В:
2
Og
| 1/2 MODULE
© INSTRUMENT
Rs,
> |
ca - | | AD
e DW : SPACER
| CLAMP
SPACER CLAMP
RETAINING SCREWS
Figure 2-4. Two Half Modules in Rack Adapter.
4
ECAUTION3
4
Do not change the setting of the line voltage
switch when the voltmeter is operating.
2-15. Rapacking for Shipment,
2-16. The following paragraphs contain a general guide
for repackaging of the instrument for shipment. Refer
to Paragraph 2-17 if the original container is to be used;
Installation
2-18 if it is not. If you have any questions, contact your
local -hp- Sales and Service Office (See Appendix B for
office locations.)
NOTE
If the instrument is to be shipped to Hewlett-
Packard for service or repair, attach a tag to
the instrument identifying the owner and in-
dicate the service or repair to be performed;
include the model number and full serial
number of the instrument. In any cor-
respondence, identify the instrument by
model number, serial number and serial
number prefix.
2-17. If the original container is to be used, proceed as
follows:
a. Place instrument in original container if available.
If original container is not available, one can be pur-
chased from your nearest -hp- Sales and Service Office.
b. Ensure that container is well sealed with strong
tape or metal bands.
2-18. If original container is not to be used, proceed as
follows:
a. Wrap instrument in heavy paper or plastic before
placing in an inner container,
b. Place packing material around all sides of instru-
ment 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.
d. Mark shipping container with “DELICATE IN-
STRUMENT,” “FRAGILE,” etc.
Operating Instructions
Model 410€
{8} MOC YOR TMETER
MÉNLET! PACINES
aC FERC 0 =
FUNCTION SELECTOR: This contro! is used for select-
ing type of measurement to be made. There are: + DC
Voltage, + DC Current, AC Voltage, and resistance
measurements,
AC ZERO: This control provides adjustment for zero-
setting the meter before making ac voltage
measurements,
MECHANICAL ZERO ADJUST: This adjustment
mechanically zero-sets the meter prior to turning on
Voltmeter.
(4) RANGE: This control selects the full scale meter range.
AC POWER SWITCH: This pushbutton-lamp combina-
tion, when depressed, turns the instrument power on or
off. The pushbutton glows when the Voltmeter power is
on.
DCA-OHMS: This lead is used in conjunction with the
COM Lead to measure de current or ohms, The FUNC-
TION SELECTOR determines which measurement is
made.
COM: This igad is used with the input leads for de cur-
rent, de voltage, and resistance measurements. The
COM Lead is normally Hoating; howaver, a shorting bar
can bs connected from the floating ground terminal to
the chassis ground terminal on the DC AMPLIFIER QUT-
PUT connector. If a shorting bar is not used, the COM
lead is fioating except when the FUNCTION SELECTOR
is set to ACV,
PCV: This lead is used in conjunction with the COM
Lead to measure + de voltage.
tL
oe ADJUST: This control is used to set meter pointer
(13) AC POWER CONNECTOR: Accepts power cabie sup-
12.
GC AMPLIFIER OUTPUT
AC PROBE (300 v MAX}: Receptacte for telephone-
type plug of Modal 11038A AC Probe. With probe con-
nected, the Voltmeter may be used to make ac voltage
measurements.
to oe before resistance measurements ars made. Oniy
periodic adjustment of this screwdriver adjustment is
necessary.
LINE VOLTAGE: This two-position siide switch sets the
instrument to accept either 115 or 230 V ac primary
power.
(12) FUSEMOLDER: The fusehoider contains a 0.25 ampere
slow-blow fuse for both 115 V ac and 230 Y ac modes
of operation,
ptied with the instrument,
(1) DC AMPLIFIER OUTPUT: Provides de voltage output
proportional to meter indication for driving external
recorder. 1,5Y de output for fuli scale meter defiection.
(15) ZERO ADJUST: This control is used to set meter
pointer to zero when cslibrating for de and resistance
measurements.
NOTE
In some older A1TOC's there is no “zero adjust
pot”. It is however possible, to use pot A3R6
{see Figures 6-4 and 5-5) to set the meter pointer
to zero. Pot ARE is located close to the top
- cover of the instrument and can be accessed with
a small screwdriver. This note is only applicable if
the new amplifier board 00470-656502 Is
retrofitted in an older 4 10C.
Figure 3-1. Front and Rear Panel Controls.
3-0
SECTION Il!
OPERATING INSTRUCTIONS
3-1. INTRODUCTION.
3-2. This section presents operating instructions for
using the -hp- Model 410C Analog Voltmeter. Refer to
Figure 3-1 for the following discussion.
3-3. The 410C is capable of measuring dc voltages up to
1500 V dc, dc currents to 150 mA, and resistances up to
10 M (center of scale), Also, ac voltages of up to 300 Y
ac can be measured by using the 110364 AC PROBE,
3.4. FRONT AND REAR PANEL DESCRIPTION.
3-5, Figure 3-1 contains a brief description and a loca-
tion layout of the front and rear panel controls and con-
nectors.
3.5. OPERATING PROCEDURES.
3-7, Before operating the 410C from the AC line verify
that the line voltage selector switch, located on the rear
panel of the instrument, is matched to the line voltage
being used. Proceed to apply power. Turn the instru-
ment on by depressing the ac power switch, The ac
power switch will glow internally when the voltmeter
power is on. If ac voltage measurements are to be made,
plug the Model 11036A AC PROBE assembly into the
AC PROBE receptacie (instrument front panel) and
aliow a minimum of five minutes warmup time.
3-8. DC Voltage Measurements.
3.9. Instructions for measuring dc voltages are given in
Figure 3-2.
HoT VOLTMETER
Hans opm amps
HEWLETT Рация ©
FUNCTION
AL ZERO
Mill
MEC == ОБЯТА
(1) Depress the AC power switch {lamp - switch combina-
tion}.
Set FUNCTION SELECTOR to polarity desired { + DC ' ог
-DCVI.
(3)ser RANGE to desired voltage position.
666 à 5 6
i a >
| Я !
&
OHNSIDADJ ея
ZERO AD
DC AMPLIFIER DUTPUT
000 ыы
; HE SEEDY
1.0 (7 1
Nu 5 LO
E AB-44047
WERD TI
26 VA MAX
(4) Connect COM Lead to the ground of circuit under test.
(5) Touch DOV probe to test point.
Reed voltage on the appropriate VOLTS-AMPS scale.
Figura 3-2. DC Voltage Measurements.
3-1
Operating Instructions
MU TEE TE
ECAUTION3
The COM lead of the Mode! 410C is normal-
ly floating. A shorting bar can be connected
at the DC AMPLIFIER OUTPUT connec-
tor, on the instrument back panel, to con-
nect the COM lead to earth ground. If the
410C is allowed to float, the COM lead must
not be connected to voltages greater than 400
У ас.
3-10. DC Current Measurements.
3.11. General instructions for measuring dc current are
given in Figure 3-3.
3-12. Measuring DC Nano-Ampere Currents.
3-13, The three most sensitive dc voltage measurement
ranges may be used to measure de nano-ampere cur-
rents, Figure 3-4 describes this operation.
3-14. Resistance Measuremants.
3-15. The procedure for making resistance measure-
ments is given in Figure 3-5.
3.16. Before making in-circuit resistance measurements
be certain that power has been removed from the circuit
under test. All capacitors should be discharged to
eliminate residual voltages.
Model 410€
3-17. AC Voltage Measurements {Figure 3-6}.
ECAUTIONS
One side of almost all power distribution
systems is grounded. Extreme caution must
be used if direct measurement of power line
voltages is attempted. [f the ground clip lead
is accidentally connected to the ungrounded
side of the line, severe damage to the 410C is
possible because of the short circuit created.
Power fine voltages can best be measured by
using the probe tip only. Contacting the
grounded power conductor will give a
reading of 0 V while contacting the
ungrounded lead will give full volrage
reading.
3-18. Although the Model 410C indicates a full scale ac
range of 500 V, the optional Model 11036A AC Probe
should not be connected to ac voltages in excess of 300
V rms. AC voltage referenced to a de voltage may be
measured, but the AC Probe clip (alligator type) must
be connected to the ground ( + ) of the circuit under
test.
ÉCAUTION
1
When measuring ac referenced to de, the
peak ac voltage plus de voltage connected to
the probe must not exceed 420 Y,
E asf VOLTMETER
HE HLETT PACXAMOD o
FUNCTION RANGE
BC ERG 1 Sed
AE Re
AW
a DO sv '
1 -
Le ` > # shy
ri AMA
РА À SD
LT
=m
«КРС + В - COTA
tion,
{+ DCA or - ОСА).
8
uE
Depress the AC power switch (iamp-switeh combina-
(2) set FUNCTION SELECTOR to the polarity desired
OHKSDADJ Na
ZERO ADJ.
05 AMPLIFIER OUTPUT
NV To mw LINE
CO Ex
+, A Г
~ LO whe 7
ES TOR
Вол НН aD 3
26 VA MAX
ki ; bid
(3) ser RANGE to desired current position.
Connect the COM iead and the DCA/ohms probe in
series with the circuit under test.
(5) Read the current on the VOLTS-AMPS scale,
Figure 3-3. DC Current Measurements.
Mode! 410C
Operating Instructions
Jr Rea Lon ot CT NT pe
ar
TP
GAME
КТ ЖЕСТ 3 (8 ас како
A] AOL WO TMEYFe
——];]—]————];—_—]]”;];—]]—
FM ITT FACE ARD &
FUNCTHON RANGE pat
AL ZERO pt]
Mc FROME
E
(O)
у E
ЧС - В - СЕТА
{depending on direction of current flow).
(2) set RANGE to desired range (0.015 V, 0.05 V, or
0.15V range).
MOTE
0.015 Vrange = 1.5 nano-ampares renge
0.05 V range = 5.0 nano-amperes range
0.15 Y range = 15 nano-amperes range
6 6 5d
Set the FUNCTION SELECTOR te +DCV or -DCV (3) Connect the DCV lead to the circuit under test.
(4) Connect the COM lead to the circuit under test,
scale (tep two on meter) which corresponds to the
range selected,
©
ZERO ADJ
;
MSDS
OC AMPLIFIER OUTPUT
Read non-amperes from the meter on the VOLTS-AMPS
Figure 3-4. DC Nano-Ampera Current Measurements, |
3-19. Precautions When Measuring AC Voltage.
3-20. Special considerations must be kept in mind when
making ac voltage measurements. These considerations
are discussed in the following paragraphs,
3-21. General Consideration of Complex Waveforms.
Waveforms containing appreciable harmonics or
spurious voltages will introduce error in the meter in-
dication since the meter has been calibrated to read rms
values of true sine waves while the Model 11036A Probe
is a peak-above-average responding device. The magni-
tude of error that may be expected when harmonics are
present on the measured waveform is indicated in Table
-1.
Table 3-1. Pessible Error when Myasuring Voltage
of Complex Wavetorms,
Harmonic True RMS Value Voltmeter indicater
O 100 100
10% 2nd 100.5 90 to 110
20% 2nd 102 80 to 120
50% 2nd 112 75 to 150
10% 3rd 100.5 90 to 110
20% 3rd 102 87 to 120
50% 3rd 112 108 to 150
3.22. Voltage Measurements at Frequencies Below 50
Hertz. Voltage measurements at frequencies as low as
20 Hz may be made without loss of accuracy by remov-
ing the plastic probe head of the Model 11036A and us-
ing in its place a 0.25 uF blocking capacitor in series
“with the exposed contact of the probe.
Ч ЧУН т
CAUTIONS
> AAA LA AAA AA à
The gray insulating material around the AC
Probe is polystyrene, a low-melting point
material. It is possible to solder to the con-
— tact which is exposed with the probe nose
removed without destroying the polystyrene.
3.23. Voltage Measurement at High Frequencies. At
frequencies above 100 MHz the distance between the
point of voltage measurement and anode of the probe
diode must be made as short as possible, If feasible,
substitute a small disc type capacitor of approximately
30 pF for the removable tip on the probe. Solder one
terminal of the button capacitor to the measurement
point in the circuit and not to the probe contact. The
probe contact (with tip removed) can then contact the
other terminal of the capacitor for the measurement.
3-3
Operating Instructions
Mode! 410C
YOLTS + AMPS
1
[05] 400 WILTMETER
af #LETT ECHO ®
FUNCTION
Al ZERY
dl FROME
[ROY MAT |
fc
SENA + Re DDT E
residual voltage.
© Qepress AC power switch damp-switch combination).
(2) Set the FUNCTION SELECTOR to OHMS.
(3) Set RANGE to desired position,
. 1 Sa OQ |
- BON —_— TT : 5° e
. 4 me
Sua Ma
1188
Before making resistance measurements, remove power from cir-
Cuit to be tested. de sure to discherge capacitors to eliminate any
OHMÉDADJ tu
ZERO ADJ
SC AMPLIFIER QUTPET
17
E Dare LINE
Fay ra ых fe чл ; A 15/2504
LA, Л © 5 4 LE 250m AT
he = Мы pt? Чл >
LO a
EE |
nie 48 -440H:
HB 167220 Ya 1 0
BG VA MAX
A M
(4) Adjust OHMS oo ADJ, control on resr panel to obtain
an oo reading on the meter if necessary.
Connect COM and DCA OHMS leads across the circuit
‘component to be tested.
(6) Resistsance is determined by multipiying tha reading on
the OHMS scale by the RANGE factor. EXAMPLE: if
reading Is 1.5 and factor is 10 K, then resistance equals
15k.
Figure 3-5. Resistance Msasurements.
3.24. At frequencies above 100 MHz considerable
voltage may be built up across ground leads and along
various parts of a grounding plane. Consequently, to
avoid erroneous readings when measuring medium and
high frequency circuits, use the ground clip lead on the
shell of the probe to connect the circuit ground. In some
cases at the higher frequencies it may be necessary to
shorten the grounding lead on the probe.
3.25. For ali measurements ai higher frequencies, hold
the molded nose of the probe as far from the external
ground place or from object at ground potential as can
conveniently be done. Under typical conditions, this
practice will keep the input capacitance several tenths of
a pF lower than otherwise.
3-26. For measurements above approximately 250 MHz
it is almost mandatory that measurements be made on
voltages which are confined to coaxial transmission line
circuits. For applications of this type, the Model
11036A Probe is particularly suitable because the
physical configuration of the diode and probe is that of
a concentric line, and with a few precautions it can be
connected to typical coaxial transmission line circuit
with little difficulty.
3-27. To connect the probe into an existing coaxial
3-4
transmission line, cut the line away so the center con-
ductor of the line is exposed through a hole large
enough to clear the body of the probe. The nose of the
probe should be removed for this type of measurement.
Connect one terminal of a button-type capacitor of ap-
proximately 50 pF to the center conductor of the coaxial
line so that the other terminal of the capacitor will con-
tact the anode connection of the probe. A close-fitting
metal shield or bushing should be arranged to ground
the outer cylinder of the probe to the outer conductor of
the transmission line. This type of connection is likely to
cause some increase in the standing wave ratio of the
line at higher frequencies. The Model 11042A Probe T
Connector is designed to do this job with SWR of less
than 1.1 at 500 MHz (see Paragraph 1-13).
3-78. Effect of Parasitics on Voltage Readings, At fre-
quencies above 500 MHz leads or portions of circuits
often resonate at frequencies two, three, or four times
the fundamental of the voltage being measured. These
harmonics may cause serious errors in the meter
reading. Owing to the resonant rise in the probe circuit
at frequencies above 1000 MHz, the meter may be more
sensitive 10 the harmonics than to the fundamental. To
make dependable measurements at these frequencies,
the circuits being measured must be free of all
parasitics.
Model 410C
3-29. Effect of DC Present with AC Signal. When
measuring an ac signal at a point where there is a high de
potential, such as at the plate of a vacuum tube, the high
dc potential may cause small leakage current through
the blocking capacitor in the tip of the Model 11036A
AC Probe. When the ac signal under measurement is
small, the error introduced into the reading can be
significant. To avoid leakage, an additional capacitor
with a dielectric such as mylar or polystyrene which has
Operating Instructions
high resistance to leakage is required. (Use 5 pF or
higher, and insert the capacitor between the point of
measurement and the probe tip).
3-30. Puise Measurements.
3-31. Positive Pulses. The Model 11036A AC Probe is
peak-above-average responding and clamps the positive
peak value of the applied voltage. This permits the
HOC wILTRETER
HEWLETT Fatrado &
FUNCTION
AC ZERO
Jt ss rem,
Connect the -hp- Model 11036A AC Probe to the Model
410C at the AC PROBE receptacie.
Set FUNCTION SELECTOR to ACV. NOTE: COM and
chassis are internally connected when the FUNCTION
SELECTOR is set 10 АСУ,
(3) ser RANGE to 0.5 V.
Deprass the AC power button tiamp-switch combina-
tion) and ellow § minute warmup,
(5) Short AC Probe Tip with Ground Clip.
(5) Adjust AC ZERO for a zero indication on the meter,
(7) set RANGE to the desired voltage rangs. |
|
ÉCA UTION3
{
Connect AC ground clip and COM Lead to earth
ground only whan in AC FUNCTION.
e y
ZERO ADJ
AY A e LINE
К Aus /230v
РАО
— A |
CHMSA TJ
BC AMPLIFIER QUTPUT
Connect AC Probe clip {alligator} to ground of circuit to
be tested, and touch probe tip to test point. At lower
frequencies COM Lead can be substituted for the AC
Probe clip.
TR FREON ET
CAUTIONS
JE М.
Before measuring voltages at frequencies above
100 MHz, refer to Figure 3-7 to determine the
¡maximum amount of voltage that can be applied
at that frequency.
Read ac voltage on the VOLTS-AMPS scale. NOTE:
When RANGE is on the 0.5 Y and 1.5 V positions, use
red mater scale.
Figure 3-8. AC Veltage Massursments.
3.5
Operating Instructions
probe to be used to measure the positive voltage
amplitude of a pulse, provided the reading is multiplied
by a factor determined from the following expression:
14 f1+ 1 EN
‘2 PRF
ti is the duration of the positive portion of the
voltage in microseconds.
t2 is the duration of the negative portion of the
voltage in microseconds.
K is a factor determined from the expression
Ro/t1 and the graph shown in Figure 3-8,
where Ro is the source impedance of the pulse
generator in kilohms, and t} is the duration of
the positive portion of the pulse in
microseconds.
PRF is the pulse repetition frequency in pulses per sec-
ond (pps). |
Suppose for example:
" tj = 10 microseconds
t? = 990 microseconds
K = 0.45
PRF = 1000 pps
Model 410C
To find K, assuming Rg = 2 kQ and ty = 10 micro-
seconds: Ro/t| = 2/10 = 0.2. Locate 0.2 on the X axis
of the graph shown as Figure 3-8, and read K where X-
and Y axes intersect the unmarked curve. If the ratio of
Ro/ti were greater than 1, you would muitiply the X
and Y axes by 10, and use the curve marked “Ro/t¡ and
K each X10.”
Solving the expression for the multiplying factor.
1.4 ( + 10 + =)
990 1000
1.4 (1 + 0,01 + 0.00045) =
1.4 (1.01045) = 1.41463
3-32. Negative Puises.
3-33. In the case of a 10 microsecond negative puise (12)
and a pulse repetition frequency {(PRF) of 1000 pps, ti
would be 990 microseconds. Thus Rg/t1 would be ap-
proximately 0, and from the graph it is seen that K is ap-
proximately 0. The expression would then reduce to
990
1.4 ( + 10)
FREQUENCY {MHz}
300
250
MAXIMUM
VOLTAGE
(RMS)
75
1900
KM: 104
Figure 3-7, Maximum AC Voltage Chart For 110364 AC Probe.
Model 410C Operating Instructions
3-34, It can be seen that in the case of negative pulses of multiplying factors must be used and unless the pulse
short duration much smaller readings will be obtained voltage is large, these measurements may be imprac-
for an equivalent positive pulse. As a result, large tical.
й = INTERNAL Z OF PULSE
® GENERATOR IN KILOHMS
T = PULSE DURATION IN
MICROSECONDS
RHYL $ AA
J ‚2 3 ‚4 ‚5 6 7B ‚9 LO
Figure 3-8. Graph Used In Calculations Of Pulse Voltage Readings.
3-7/3-8
SECTION IV
THEORY OF OPERATION
4-1. GENERAL DESCRIPTION (FIGURE 4.1).
4-2. The -hp- Model 410C Analog Voltmeter is com-
prised of four basic blocks: (1) the Input Switching and
Attenuator Network, (2) a FET Input Amplifier, (3)
Meter and Feedback circuit, and (4) the Power Supply.
Figure 4-1 is a basic block diagram of the Model 410€.
4-3. The signal inputs to the Input Switching and At-
tenuator Network are made through the appropriate in-
put leads. AC voltages are rectified in the AC Probe,
therefore all signals applied to the input network are dc.
The input network attenuates the dc signal to a level
determined by the RANGE and FUNCTION SELEC-
TOR settings. The attenuated dc voltage is amplified to
provide drive for the meter circuit. The output of the
amplifier is a d¢ voltage proportional to the amplitude
of the signal being measured. This output is also
available on the instrument's back panel DC
AMPLIFIER OUTPUT connector. A portion of the
meter circuit voltage is returned to the amplifier as feed-
back. The gain of the amplifier is therefore determined
by the feedback circuit,
4-4. CIRCUIT DESCRIPTION.
4-5, Input Switching and Attenuator.
4-6. The input network accurately attenuates the input
voltage to a maximum of 15 mV at the amplifier input.
This input network (resistors A3R30, A2R4, and A2R10
through A2R26) in conjunction with R1 (located in the
DCV probe) presents an input impedance of 10
megohms on the three most sensitive ranges (DCV) and
100 megohms on the eight less sensitive ranges. (DCV
and ACV).
4-7. Amplifier {Figure 5.8).
4-8. The amplifier in the Model 410C consists of a FET
differential pair (Q1) and a low drift op amp (U1). The
FET input circuit ensures that the input impedance of
the amplifier is approximately 1012 ohms. The amplifier
operates in the non-inverting mode with the feedback
network (connected to inverting input) setting the gain
of the amplifier (see Figure 4-1). The output of the
amplifier drives meter M1 and is also applied to the DC
AMPLIFIER OUTPUT connector (J2) located on the
instrument’s back panel.
F “e bw wie wr deh her dr ae wr de
DC AMPLIFIER |
TPLF ’
+
¥
Te te te dr on He eel
410C-8-9
Figure 4-1, Block Diagram, Model 419€.
Theory of Operation
4-9, The input circuit protection diodes, CRI and CR2,
will conduct if too high a voltage is applied to the ter-
minals for the selected range. Variable resistor A3R6 1s
the amplifier's DC Zero adjustment pot (see Paragraph
5-32). Variable resistor A3R12 is used during calibration
to adjust the current to the input FET stage (see
Paragraph 5-30).
4-10. The power supply voltages appearing at pins 8,
10, 13, and 15 are not used with the FET/op amp A3
Amplifier assembly (00410-66502). These voltages are
required if the older Modulator/Demodulator A3
assembly is used (410C-65A). Resistor R18 is a dummy
load for the + 6 volts that was used for the vacuum tube
filament on the 410C-65A board.
4-11. DC Current Measurements (Figure 5-13). The
purpose of the input network is to provide proper at-
tenation of currents applied. Currents from 1.5 pA to
150mA full scale are applied with input impedance
decreasing from 9 КО on the 1.5 pA range to approx-
imately 0.3 {2 on the 150 mA range.
4-12. The change in input impedance is varied by using
dec current shunts in conjunction with RANGE switch
A281. The de voltage developed across these shunt
resistors is amplified and applied to the meter, to pro-
vide a deflection on the meter proportional to the de
current being measured.
4-13. DC Voltage Measurements (Figure 5-14). The
purpose of the input network is to accurately attenuate
the input signal to a maximum of 15 mY at the amplifier
input. The network presents an input impedance of 10
M$ on the three most sensitive ranges and 100 MQ on all
other ranges.
4-14. Resistor R1 (located in the DCY probe) in con-
junction with resistors A2R10 through A2R26, provides
the 10 MQ input impedance required for the three most
sensitive DCV ranges. Resistors A2R4 and A3R30 are
shunted out of the circuit by the RANGE switch on the
three most sensitive DCV ranges.
4-15. When using the eight less sensitive ranges, A2R4
and A3R30 are placed in series with RI and A2R10
through A2R26 to present more than 100 MQ im-
pedance to the input.
4-16. A3R30 is used to calibrate fuil scale on the 1500 V
range (see Paragraph 5-33).
4-17. Resistance Measurements (Figure 5-15), The pur-
pose of the input network is to place an approximately
0.6V dc source in series with a known (reference)
resistance. The resistance to be measured is placed in
parallel with the known resistance, which changes the
voltage proportionally. The maximum changes in
voltage applied to the modulator is 15 mV because of at-
tenuation provided by A2R4, A3R30, and AIR2.
4-2
Model 410C
4-18. À de current of approximately 60 mA is supplied
at the junction of A2R22 and A2R23 through A7R10,
R3, A2R2 and A2R1 to the input network. The OHMS
æ ADI, R3, sets the meter for full scale ( e ),
Resistor AZR1 is shorted out in the XiM position of the
RANGE switch: resistors A2R1 and A2R2 are shorted
out in the XI0M range. The resistors A2R2 and/or
A2R1 are electrically removed from the circuit to in-
crease the voltage at the junction of A2ZR22 and A2R23.
This is done to compensate for the loading of the at-
tenuator (A2R4, A3R30, and AIR2} on these ranges.
4-19. AC Voltage Measurements (Figure 5-16). AC
voltages are rectified in the AC Probe and applied to the
input network. The input signal is attenuated to produce
a maximum of about 15 mV at the amplifier input, AC
zero adjustment of meter pointer is made with the AC
ZERO control.
4-20. The Feedback Network.
4-21. The feedback network drives the meter and deter-
mines the dc gain of the amplifier. The feedback is
varied depending on the position of the FUNCTION
and RANGE selectors. The different feedback con-
figurations are discussed in paragraphs 4-22 and 4-23.
4-22. Feedback Network for DCA, Ohms, and
+ DCV. Figures 5-13, 5-14 and 5-15 show the feedback
configuration for all positions of the FUNCTION
SELECTOR except ACV. The meter is electrically in-
verted for £ DCV and + DCA modes of operation. The
DC OUTPUT ADJ., A6R20 sets the output voltage.
The dc pot, A6R18 determines the amount of feedback
to the amplifier. The resistor A2R30 is in the circuit in
the + .015 DCV and + 1.5 uA modes of operation to
decrease feedback. This increases the amplifier’s gain to
compensate for the decrease in input signal to the
amplifier on these ranges.
4-23. Feedback Circuit for AC Voltage Measurements.
Figure 5-16 shows the feedback configuration for the
ACV position of the FUNCTION SELECTOR switch,
A181. The resistors that are placed in the circuit by the
RANGE switch, program the amplifier gain to compen-
sate for the non-linear response of the AC Probe,
A6R16 and A6CRI compensate the non-linear response
of the AC Probe to the linear calibration of the upper
meter scale on the 5 V range.
4-24. Power Supply.
4-25, Primary Power (Figure 5-7), Either 115 or 230 V
ac power is connected through fuse Fi (0.25 amp slow-
blow) and switch SI to the primary of power
transformer T1. Switch SZ connects T1 primaries in
parallel for 115V operation or in series for 230 V opera-
tion.
Model 410C
4-26. Unregulated and Zener Regulated Power Supply
with 410-65A A3 Assembly. The full-wave rectifier cir-
cuit consisting of CR1 and CR2 produces unregulated
+ 270 Y which is used to drive the photochopyer neons,
Unregulated +175 V and +140 V are tapped off and
used to provide B+ for the plates of A3VIB and
AVIA, respectively. Zener regulators A7CR6 and CR7
provide regulated +38 V and -9 Y to bias A301 and
A3Q2. Filtering of the outputs is provided by the RC
network consisting of ATR! through A7R3 and C5A
through CSD.
4-27. Unreguiated and Zener Regulated Power Supply
- with 00410-66502 A3 Assembly. Plus 38 V and —9 V
are the only voltages used by the FET/op amp A3
Amplifier Assembly, A 20V zenerand a 4.75 V zener on
the A3 board are used to provide regulated voltages for
Qi and Ul. |
Theory of Operation
4-28. Series Regulated Power Supply. The output of
the full wave rectifier CR3 and CR4 is regulated by tran-
sistor Q1, which is connected in series with the output.
Zener diode A7CR8 provides reference voltage to the
base of Ql. Regulated + 6 Y is supplied to the filaments
of A3VIA/B and the AC Probe diode ASVI. Plus 0.6 Y
is provided through A7R10 to R3, the OHMS & ADJ.
control. Filtering of the outputs is provided by C6A and
CaB.
4-29. Standby Filament Supply. The filament tap (T1,
pins 1 and 2) provides 6.0 V ac to the filament of the AC
Probe diode, A8V1, so that the filament remains warm
when the Model 410C is being used in modes of opera-
tion other than ACY. When FUNCTION selector AS]
is switched to ACV, 6.0 V ac is removed from the fila-
ment and 6 Y dc is applied. Therefore, the ACV mode is
ready for immediate use, without waiting for the fila-
ment to warm up.
4-3/4-4
WARNING }
Maintenance described herein is performed
with power supplied to the instrument, and pro-
tective covers removed. Such maintenance
should be performed only by service-trained
personnel who are aware of the hazards in-
volved (for example, fire and electrical shock).
Where maintenance can be performed without
power applied, the power should be removed.
SECTION V
MAINTENANCE
5-1. INTRODUCTION.
5-2. This section contains performance test procedures,
adjustment and calibration procedures, troubleshooting
procedures, circuit schematics and simplified schematics
of each measurement function to aid in the
troubleshooting process of the Model 410C Electronic
Voltmeter, |
5-3. TEST EQUIPMENT REQUIRED.
5-4. The test equipment required to maintain and ad-
just the Model 410C is listed in Table 5-1. Equipment
having similar characteristics may be substituted for
items listed.
5-5. PERFORMANCE TESTS.
5-6. The performance tests presented in this section are
front panel operations designed to compare the Model
410C with its published specifications. These operations
may be incorporated in periodic maintenance, post
repair and incoming quality control checks. These
operations should be conducted before any attempt is
made at instrument calibration or adjustment. During
performance tests, periodically vary the line voltage to
the Model 410€, + 10% on either 115 Y or 230 V
operation. A 1/2 hour warm-up period should be allow-
ed before these tests are conducted,
Table 5-1. Recommended Test Equipment.
instrument Type Required Charactaristics
Une Recommended Modal
DC Voitage Standard | Range: 0.015 to 300 V
Accuracy: + 0.2% de
DC Accuracy
Checks and Calibration
Adjustments
Systron - Donner Model M107
AC Calibrator with Frequency: 20 Hz to 10C kHz
High Voltage Ampiifier? Output: .5 V to 300 V
AC Voltmeter Accuracy Test
-hp- Model 745 and 746 AC Calibrator’
and High Voltage Amplifier ;
Frequency: 20 Hz to 10 MHz
Oscillator
Output: 2.0 V
Frequency Response Test
-hp- Model 852A Test Oscillator
DC Power Supply Range: O to 10 Y Continuous
DC Ammetar Accuracy Tests
-hp- Model 8214A DC Power Supply
Digital Multimeter
Accuracy: + 0.2%
Range: 20mV-200V,DC;10V RMS,AC | Accuracy Tests: Power Supply
Maasurements: Troubleshooting
-hp- Model 34686A Digital Voltmeter
Frequency: 10 MHz to 400 MHz
VHF Signal Generator
Output: 1.0 V
Fraquency Response Test
-hp- Model 60SE VHF Signal Generator
UHF Signal Generator | Frequency: 480 MHz to 700 MHz
Frequency Rasponse Test
-hp- Mode! 812A UKF Signal Generator
Frequency Range: 10 MHz 700 MHz
Output Voitage: 0.44 V rms
Accuracy: NBS Calibrated
Micro-Potentiometer
Frequency Rasponse Test
Micro-Potentiometar
Belantine Model 440
Probe-T-Connector For use with 50 obrm transmission
ling
Frequancy Response Test
-hp- Model 11042A Probe-T-
Connector
Connector Adapter Type N Male to BNC Female
fraquency Response Test
-hp- Part Number 1250-0067
Connector Adapter BNC to Binding Post
Fraquency Response Test
-hp- Part Number TO1T 10A
Connector Adapter Type ‘N°’ Male to Type “N'” Fernate
Frequency Response Test
-hp- Part Number 11501A
50 Q Termination
Low Refiection
Frequency Range: 10 MHz to 700 MHz| Frequency Respansa Test
i -hp- Part Number 808A
50 {i Fead-Thru
Meis BNC to Femaie BNC
Performance Tants
-hp- Modei 11048C
Rasistors:
10 MU Accuracy: + 1%
56 к Accuracy: + 1%
10 K Accuracy: + 1%
1,5 K Accuracy: + 1%
560 Accuracy: + 1%
108 Accuracy: + 1%
Performance Tasts
Pertormance Tests
Performance Tests
Performance Tasts
Performance Tests
Performance Tests
-hp- Part Number 0730-0188
-hp- Part Number 0730-0053
-hp- Part Number 0727-0157
-hp- Part Number 0730-0017
-hp- Part Number 0811-0341
-hp- Part Number 0727-0335
Maintenance
5.7. Mechanical Meter Zero.
a. Instrument must be turned off for a few minutes
or install a short across the meter terminals,
1, Rotate mechanical zero-adiustment screw on front
panel clockwise until pointer reaches zero, moving up
scale.
c. If for some reason the pointer should overshoot
zero, repeat step b until desired results are obtained.
d. When pointer has been positioned at zero, rotate
zero-adjust screw slightly counterclockwise to free it. If
meter pointer moves to the left during this action, repeat
steps b and d.
| WARKING }
Hazardous voltages used in some of the
Jollowing tests.
5-8. DC Voltmeter Operation.
5-8. Accuracy Test (DCV).
a. Short Model 410C DCYV probe to COM lead; set
pointer to zero using rear panel adjustment (ZERO
ADJ).
b. Set the Model 410C FUNCTION SELECTOR to
the + DCY position; RANGE switch to .015 Y, Con-
nect Model 410€ DCY and COM cables to the DC
Standard output Terminals.
c. Adjust DC Standard and Model 410C to settings
listed in Table 5-2.
Model 410€
Table 5-2. DCV Accuracy Test.
DE Standard
Mode! 410C Settings Model 410C
Range Sattings Voltage Meter Rasdings
015 Y + 015 0147 t0.0153 Y
05 Y + .05 ,049 to .051 Y
15 V + ,16 ‚147 10.153 V
BY + 5 49 to 61 V
1.5 Y + 1.8 1.47 t0 1,83 V
BY + 6 4.9t06.1 Y
15 V + 15 14.7 10 15.3 Y
50 V + 50 49 to 51 V
150 V + 180 147 t0 153 Y
500 Y + 300 290 to 310 V
1500 Y + 300 270 to 330 Y
d. Model 410C should indicate readings within limits
specified. If not, refer to Paragraph 5-26 for adjustment
procedure,
5.10. Input Resistance Test (DCV).
a. Connect a digital voltmeter (-hp- 3466A) to the DC
Amplifier Output. Set digital voltmeter range to 10 V.
b. Set 410C RANGE to .015 Y, FUNCTION to
+ DCV. |
ce. Connect the DC Standard in series with a 10 MQ
+ 1% resistor (-hp- Part Number 0730-0168). Set the
DC Standard output to + .015 V. Connect the Standard
and series resistor to the 410C DCV probe.
d. Adjust the calibrator and 410C to settings listed in
Table 5-3. Digital voltmeter readings should be within
the limits specified for each setting. If readings are not
within limits, refer to Paragraph 5-35, Amplifier Qutput
Calibration; recalibrate amplifier and repeat test.
POWER SUPPLY
ho 62144
hp 4i0C
ELECTRONIC
VOLT.
METER MULTIMETER
"В - 3466 А
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Ri
Figure 5-1. DC Ammater Operation.
Model 410€
Maintenance
Table 5-3. DCV Input Resistance Test.
Model 4106 DC Standard Mode! 3466A Mode! 41DC
Range Settings Voitage Voltages Readings Ria
015 Y 015 0.7202 to 0.7801 10 МО + 3%
05 V ‚O5 0.7202 19 0.7801 10 MI + 3%
‚15V ‚15 0.7202 to 0.7807 10 MU + 3%
.50 Y 50 1.333 to 1.394 - ¡ 100 MY + 1%
1,5 V 1.5 1,333 to 1,394 100 MO = 1%
BV 5 1.333 to 1,394 100 MQ + 1%
15 V 15 1.333 tc 1.394 100 MG + 1%
50 Y 50 1,333 to 1.394 100 MO + 1%
1580 V 150 1.333 te 1,394 109 MO + 1%
590 V 300 0.800 to 0.863 100 MO + 1%
1590 Y 300 0.285 ta 0,280 100 MO + 1%
5-11. DC Ammeter Operation.
S-12. Accuracy Test (DCA).
a. Figure 5-1 describes the test arrangement required
for this operation.
b. Connect the Model 410C as shown in Figure 5-1;
FUNCTION SELECTOR to + DCA; RANGE to 150
mA.
c. Use 56 § resistor for R1 and 10 resistor for R2,
d. Adjust dc power supply to obtain reading on de
voltmeter specified in Table 5-4; change R; and R2 ac-
cording to Table 5-4.
e. Model 410€ should read within limits specified in
Table 5-4. If not, refer to Paragraph 5-26 for adjust-
ment procedure,
5:13. Ohmmetor Uperstion.
5-14. Ohmmeter Accuracy Test.
a. A 10 Q + 1% resistor (-hp- Part Number
0727-0335) and a 10 M + 1% resistor (-hp- Part
Number 0730-0168) will be required for this test.
b. Set Model 410C FUNCTION SELECTOR to
OHMS; RANGE to RX10.
¢. Set pointer to oo using rear panel adjustment
(OHMS ADJ) if required.
d. Connect COM and DCA OHMS cables across 10
resistor.
e. Meter should read 10 {1 (+ 5%).
f. Set Model 410C RANGE to RX10M. Replace 10 Q
resistor with 10 M1} resistor.
g. Meter should read 10 MQ (1% 5%).
h. If both of these ranges function properly, it can be
assumed that the remainder will also. If meter does not
function properly, refer to Paragraph 5-26 for adjust-
ment procedure,
5-15. Amplifier Operation.
5-16. Amplifier Gain Test.
a. Connect the DC standard output to Model 410C
DCY and COM cables.
Table 5-4. DCA Accuracy Test.
Mods! 41BC OC Voltmetar Modal 4106 Ri R
Range Sattings Readings Meteor Readings Q ú
150 MA 1.4V 135.5 to 144.5 MA 56 10
50 MA AY 38.5 to 41,5 MA 56 10
15 MÁ .14 Y 13.56 to 14.55 MA 56 10
5 MA 04 V 3.85 to 4.15 MA 56 10
1.5 MA .014 Y 1,35 to 1.45 MA $6 10
‚5 MA O04 V 0.385 t0 0.415 MA 56 10
150 uA 1,38 V 133.6 to 142,5 uA 66 K 10 K
50 uA 0.46 V 44.5 10 47.5 LA 56 К 10K
15 uh 0.138 V 13.35 t0 14.25 uA 56 XK 10K
5 kA 0.048 V 4,45 to 4,75 uA 56 K 10K
1.5 4A __9.014v 1,36 to 1,45 zA 56K | 10K
Maintenance
b. Connect DC Voltmeter (-hp- Model 3466A) to DC
AMPLIFIER OUTPUT on rear panel of Mode} 410C,
Set DC Voltmeter RANGE to 10 V,
c. Set Model 410C FUNCTION SELECTOR to
+ DCV; RANGE 10 .015 Y,
d. Adjust the DC Standard for + .015 VDC output.
e. The dc voltmeter should indicate from 1.467 V to
1.533 Y, This will verify a gain of 100, where the gain
equals Enc out/Epcin.
f. If the de voltmeter does not indicate within the
limits of step e, refer to Paragraph 5-26 for proper ad-
justment procedure,
5-17. Output Level Test.
a. A DC Standard and a DC Voltmeter {-hp- Model
3466A) will be required for this test.
b. Connect dc voltmeter to dc amplifier OUTPUT on
Model 410C rear panel. Place ground lead between
Model 410C circuit ground and earth ground terminals,
Set de voltmeter RANGE to 10 Y.
¢. Set Model 4i0C FUNCTION SELECTOR to
+ DCV; RANGE to 1.5 У.
d. Adjust the DC Standard to provide + 1.5 V.
e. Model 410C and de voltmeter should indicate from
1.467 Y to 1.533 Y,
f. If dc voltmeter does not indicate within the limits
of step e, refer to Paragraph 5-26 for proper adjustment
procedure,
8-18. Amplifier Output Impedance Test.
a. Connect an external DC Voltmeter (-hp- Model
3466A) to Model 410C DC AMPLIFIER OUTPUT ter-
minals on rear panel. |
b. Set Model 410C FUNCTION SELECTOR to
OHMS position; RANGE to RXTOK.
c. Record voltage indicated on external de voltmeter
for use as a reference.
d. Connect a 1.5 К@ + 1% resistor (-hp- Part
Number 0730-0017) across 410C DC AMPLIFIER
QUTPUT terminals. DC voltage recorded in step c
above should not change more than 3 mV, indicating
that dc amplifier output impedance is within the 3 Q
specification at de.
5-19. Amplifier Noise Test.
5.4
Model 410C
a. Connect an AC Voltmeter (-hp- Model 34664) to
the DC AMPLIFIER OUTPUT of Model 410C,
b. Set the Model 410C FUNCTION SELECTOR to
+ DCV; RANGE to 1500 V.
¢. Short the Model 410C DCV and COM cables. Ex-
ternal ac voltmeter reading should be less than 2.65 mV
rms (7.5 mYp-p).
d. Reset Model 410C RANGE to 1.5 Y. AC
Voltmeter should read less than 2.65 mV rms.
5-20. Overload Recovery Test.
a. Connect the DC Standard output to Model 410C
DCV and COM cables.
b. Set Model 410C FUNCTION SELECTOR to
+ DCY: RANGE to .15 Y. |
c. Adjust the DC Standard for +0.15 VDC; note
reading on Model 410C.,
d. Readjust the DC Standard for + 15 VDC output;
wait 5 seconds for complete saturation; then switch
voltmeter calibrator back to + .15 VDC output. Note
time required for meter to return to original position.
e. Recovery time should be less than 3 seconds.
f. Repeat this same Overload Recovery Test with the
410C set for —DCV and the DC Standard set for
-DCY.
5-21. AC Rejection Test.
a. An AC Calibrator (-hp- Model 745A) and an RMS
Voltmeter {-hp- Model 3466A) are required for this test.
b. Set 410C FUNCTION SELECTOR to -DCV;
RANGE to .015 Y,
c. Connect the AC Calibrator output to Model 410C
DCY and COM cables and input of rms voltmeter. Set
rms voltmeter to read Ю Y.
d. Adjust the AC Calibrator to provide 3.18 V (4.5 Y
peak) reading on rms voltmeter at 50 Hz,
e. Model 410C should not read more than 2.25 mV
verifying 66 dB ac rejection at 30 Hz,
f. Increase frequency to check ac rejection about 60
Hz.
g. Switch Model 410C FUNCTION SWITCH to
+ DCV and repeat steps e and f.
Model 410C
Maintenance
TEST OSCILLATOR
ho 652A
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50-0MM !
FESO-THRV — |
RESISTOR
ho 4:05
ELECTRONIC
VOLTMETER
hplo4sc — :
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Figure 5-2. Low Fraguency Response Test.
5-22. AC Voitmater Operation.
ÉCAUTIONS
When measuring ac voltages, do not permit
ac ground jumper of Model A10C AC Probe
to contact ungrounded side of ac source or
serious damage to 410€ will result,
| WARNING |
Hazardous voltages used in some of the
following tests,
5-23. AC Voltmeter Accuracy Test,
. a. Set Model 410C RANGE to 0.5 Y. Short the input
of the AC Probe. Adjust ZERO vernier for zero pointer
deflection.
b. Connect ACV probe to the AC Calibrator (-hp-
Model 745A}.
c. Adjust the AC Calibrator for 400 Hz output.
d. Set Model 410C FUNCTION SELECTOR to
ACV; RANGE to S00 V, |
e. Adjust the AC Calibrator to settings listed in Table
5-5. Model 410€ should indicate readings within limits
specified. If not, refer to Paragraph 5-36 for corrective
action. Record Model 410C reading with 0.3 V input.
NOTE
The frequency response tests are performed
using reference voltage obtained with 0.3 V
input.
Table 5-5. AC Accuracy Test.
Voltmeter Calibrator
410€ 400 He — Model 410€
Range Voltage Selection Headings
BOO V 300 285 to 315 V
150 Y 150 145,5 10 154,5 V
50 V 50 48,5 to 51.5 V
15 V 15 14.55 to 15.45 V
BY 5 4,85 to 5.15 V
1,5V 1.5 1.455 to 1.545 V
ВУ 0.5 0.405 10.515 Y
БУ 0.3 0.285 to ,315 V
5.24. AC Voltmeter Low Frequency Response Test.
a. A Test Oscillator (-hp- Model 652A), 8 BNC-to-
Binding Post Adaptor (-hp- Part Number 10110A) and
a 50 Feed-thru Termination (-hp- Part Number
11048C) are required for this test.
b. Connect Model 410€ as shown in Figure 5-2.
c, Set Model 410C FUNCTION SELECTOR to
ACV; RANGE to 0.5 V,
d. Set Test Oscillator frequency to 400 Hz, and ad-
just amplitude to give same 410C reading as recorded in
Paragraph 5-23, step e, with 0.3 Y input.
e, Set Test Oscillator REF SET 10 convenient level,
f. Adjust frequency of Test Oscillator to various car-
dinal points between 20 Hz and 10 MHz, resetting
amplitude to reference level set in step d for each fre-
quency. Model 410C readings should be the same as the
reading set at 400 Hz in step d + 10% from 20 Hz to
100 Hz and + 2% from 100 Hz to 10 MHz.
Maintenance
5.25. AC Voltmeter High Frequency Response Test.
a. A VHF Signai Generator (-hp- Model 608E), a-
UHF Signal Generator (-hp- Model 6124), a Probe-T-
Connector (-hp- Model 11042A), a Micropotentiometer
(Ballantine Model 440), and a DC Voltmeter (-hp-
Model 3466A) are required for this test. Figure 3-3
describes test arrangement to be used.
NOTE
The micropotentiometer must have the pro-
per radial resistance and current rating to
deliver 0.30 V at its output.
b. Set VHF oscillator output to provide output to
Model 410C reading recorded in Paragraph 5-24, step f,
with .3 Y input; frequency to 10 MHz. Record de
voltmeter reading for reference.
¢. Vary VHF oscillator frequency from 10 MHz to
480 MHz maintaining reference dc voltmeter reading by
readjusting VHF oscillator output. Model 410C reading
should be the same as the reading set at 400 Hz in
Paragraph 5-24, step d, + 2% at frequencies to
30 MHz, 0 to -4% from 50 MHz to 100 MHz and
+ 1.5 dB at all higher specified frequencies.
Model 416C
d. Replace VHF oscillator with UHF oscillator in
Figure 5.3, Repeat steps b and ¢ for UHF oscillator out-
put frequencies from 480 MHz to 700 MHz.
WARNING
Calibration described herein is performed
with power supplied to the instrument, and
protective covers removed. Such
maintenance should be performed only by
service trained personnel who are aware of
the hazards involved (for example, fire and
electrical shock).
Socket for A3 board has dangerous voltages
(+270 К, +173 И, апа +140 И). See
Schematic 5-8.
5-26. ADJUSTMENT AND CALIBRATION PROCEDURE.
5-27. The following is a complete calibration procedure
for the Model 410C. These operations should only be
performed if it has been determined by the Performance
Tests, Paragraph 5-8, that the Model 410C is out of ad-
justment. If the procedures outlined do not resolve any
discrepancies that may exist, refer to Paragraph 5-40,
Troubleshooting, for a possible cause and recommend-
¢d corrective action,
VHF
SIGNAL GENERATOR
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SIGNAL GENERATOR 2
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TYPE "N* MALE
TYPE "N" FEMALE
hp 410C
ELECTRONIC
VOLTMETER
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300 TERMINATION
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A7 11082 A
PROBE “TT CONNECTOR
Figure 5-3. High Frequency Response Test.
Model 410C
3-28. Disconnect the ac power from the Model 410C.
Remove the top and bottom covers and the two side
panels from the instrument. Refer to Figure 5-4 and 5-5
throughout this procedure for adjustment locations.
5-29. Power Suppiy Test.
a. Apply power to 410C,
b. Refer to Table 5-6 and Figure 5-7 for Power Supp-
ly test points and typical voltage values, Measure de
voltages between COM lead and designated location on
AT.
Tabel 5-6. Power Supply Test.
Location on A?
Voltage {Figure 5-8) Tolerance
+ 38 V | Junction of CR6 and R4 | + 8..0 \
+ 6V | 926 + 0.6V
- 9 Y | Junction CR7 and R7 + 1.8 Y
5-30. Amplifior Current Adjustment.
a. Connect a 3466A voltmeter or equivalent
voltmeter with an input impedance of 10 M ohms or
greater across A3R7.
b. Adjust A3R12 for the voltmeter to read 9,476 V
de; 400 pA will be flowing through R7 with this 9.476 V
reading.
Maintenance
5-31. DC VOLTMETER CALIBRATION.
§-32. DC Zero Adjustment.
a. Set Model 410C FUNCTION SELECTOR to
+ PCV and RANGE switch 10 0.5 У.
b. Short the DCV probe to the COM lead.
c. Set the DC ZERO adj. contro! at the back of the
instrument its center position.
d. Adjust the Zero Adj. pot A3R6 on the A3
amplifier board till there is no meter movement when
the FUNCTION SELECTOR is switched from — DCV
to +DCY,
5-33. DC Full Scale Adjust.
a. Connect the Model 410C DCV and COM cables to
the DC Standard output terminals.
b. Set the Model 410C FUNCTION switch to the
+ DCY position and the RANGE switch to the .015 Y
position.
¢. Set the DC Standard for an output voltage of .015
YDC.
d. Adjust A6R18 to provide a full scale reading.
À / /
| t AN и
A6
AJ RE
ASF AGRIS ABRE
Figure 5-4. Adjustment Locations.
Maintenance
ТОР ОР АЗ
| ARÉ
e] A3R10
© A3R30
A3
Figure 5-5. A3 Board Adjustment Locations.
e. Using Table 5-7 as a guide, adjust A6R18 to a set-
ting which will provide the best overall full scale
readings on the 0.015 V, 0.05 V, 0.15 V ranges. Adjust
A3R30 for the best overall full scale readings on all
ranges above 0.15 V.
NOTE
AG6R18 must be adjusted before A3R30
because AGRI8 affects all ranges, and
A3R30 only affects ranges above the 0.15 V
range.
Table 5.7. DCV Calibration Procedurs.
Model 4196 OC Standard Medel 410€
odel 41 edal 410 |
Renge Settings Voltage Meter Readings Adjustment
015 V ‚015 0147 10.0153 V| AGRt8
.05 у ‚05 048 10.051 V ASRi8
.158 Y 15 .147 10.153 V AGR18
.5 Y 5 49 10.61 V A3R30
1,5 V 1.5 1.47 to 1.53 V A3R30
5 V 5 4,9 to 5,1 V A3H30
18 V 16 14.7 to 15,3 V A3R3C
50 V 50 A9 to 53 V AZRIO
150 Y 150 147 to 153-Ÿ ASR3IO
509 \ 300 290 to 310 V A3R30
1500 Y 300 270tc 330 V A3R30
5.34. Ohmmater Calibration.
a. Set the Model 410C FUNCTION SELECTOR
switch to OHMS and the RANGE to RX10M.
b. Short the OHMS and COM leads together, The
Model 410C should read zero. If it does not, recheck the
DC ZERO ADJ (see 4-32). Check for a zero reading on
all ranges. The RX 10 range should read about 0.1 ohms
which is the resistance of the leads.
¢. Disconnect the OHMS and COM leads. Adjust the
OHMS ADJ (410C rear panel) for a reading of infinity.
d. The meter should indicate infinity when the range
switch is changed to other ranges.
5-8
Model 4100
6-35. Amplifier Output Calibration.
a. Set the Model 410C FUNCTION SELECTOR
switch to the + DCV position and the RANGE switch to
3.0 У.
b. Connect the 410C DCV and COM leads to the DC
Standard. Set the DC Standard for a voltage output of
5.0 Y,
c. Connect the 3466A voltmeter to the DC
AMPLIFIER OUTPUT terminals on the back of 410C.
d. Adjust A6R20 to give a 1,5 V dc reading on the
voltmeter.
NOTE
The amplifier output will give a negative
voltage for all negative de and ac inputs.
5.36. AC VOLTMETER CALIBRATION.
5-37. An AC Calibrator (-hp- Model 745 and 746 or
equivalent) is required for the AC Voltmeter calibra-
tion.
5-38. AC Zero Adjust.
a. Insert the telephone plug from the 11036A AC
Probe into the AC Probe receptical on the Model 410C.
Set the FUNCTION SELECTOR switch to the ACV
position and the RANGE switch to 0.5 Y. Allow 5
minutes for the diode in the AC Probe to stabilize.
b. Set the AC Zero vernier, which is concentric with
the FUNCTION SELECTOR switch, to the center of its
roatation.
c. Short the Mode! 11036A AC Probe tip to the AC
Probe common.
d. Adjust A3R31 for a Model 410C meter reading of
zero.
e. If necessary, use the AC ZERO vernier as a fine
adjust to obtain the Model 410C meter indication of
2810.
5.39. AC Full Scale Adjust,
ECAUTION3
When measuring ac voltages, do not allow
the ac ground lead of the 11036A AC Probe
lo contact the ungrounded side of the ac
source or serious damage to the Modei 410C
will result.
a. Connect the Model 410C AC PROBE (11036A} 10
the cutput terminals of the AC CALIBRATOR.
Medel 410€
b. Set the Model 410€ RANGE switch and the AC
CALIBRATOR to the settings outlined in Table 5-8, Set
the calibrator frequency to 400 Hz. Adjust the ap-
propriate control for the required Model 410C reading.
This completes the calibration procedure.
Tahle 5-8. AC Full Scale Adjust.
Valtmatar
Model 410C | Calibrator | Model 410€
Range AC Voltage Reading Adjustment
Settings + 3%
BV ‚50 AY ABR3
1.5 V 1.5 1.5 V AGAL
BV 5 ay AGR7
15 Y 15 15 V AGH 14
*50 V 50 50 V ABR14
*150 V 150 150 V ABR14
* 500 \ 300 300 Y ABR14
*ABR14 is proper adjustment of Model 410C for RANGE
settings from 15 V ac to 500 V ac. Select proper ABR14
setting which will provide best overall results for these
ranges.
| WARNING |
Maintenance described herein is performed
with power supplied to the instrument, and
protective covers removed. Such
maintenance should be performed only by
service trained personnel who are aware of
the hazards involved (for example, fire and
electrical shock). Where maintenance can be
performed without power applied, the power
should be removed.
. Before any repair is completed, ensure that
all safety features are intact and functioning,
and that all necessary parts are connected to
their protective grounding means.
Note that the socket for the A3 board has
dangerous voltages (+270V, +175V and
+ 140V). See Figure 5-8, Amplifier
Schematic. |
5-40. Troubleshooting.
5-41. Preliminary Troubleshooting, Before you
disassemble the instrument for troubleshooting, check
the Model 410C on several functions and ranges. This
can frequently lead or point to the source of trouble.
For example, if the Model 410C fails on all ACV ranges
but works correctly on ali DCV ranges, the failure may
lie in the 11036A AC probe or perhaps in the input
switching network. If the problem exists only in the
OHMS measurement mode, you should check the
OHMS current source (i.e. A2R1, R2, R34; ATR1(; КЗ
(rear panel) and the + 6 voit supply).
5-42. Remove the power cord and top, bottom and side
covers from the 410C and conduct a thorough visual in-
spection of the instrument. Look for overheated or
Maintenance
loose components, loose connections, or any other ob-
vious conditions which might indicate the source of
trouble. You may wish to pull out the A3 board for a
closer inspection. The A3 board edge connector con-
tacts may be cleaned by rubbing them with a common
pencil eraser.
5-43. Power Supply Troubleshooting.
5-44. A chart showing some of the more pertinent
voltage and resistance values for the A7 Power Supply
circuit board is given in Figure 5-6. This chart and the
power supply schematic (Figure 5-7) may be used to
troubleshoot and diagnose the power supply.
5-45. Amplitiar Troubleshooting.
5-46. When analyzing amplifier problems, refer to the
Block Diagram in Figure 4-1 and the Ampiifier
Schematic in Figure 5-8. Check all of the eleven DCV
ranges to see if the input attenuator/switching, the A3
Amplifier Assembly, and the feedback /switching are
functioning correctly, Perform these checks in the
following manner.
a. Set the 410C Function Selector Switch to the
+ DCV position.
b. Connect a dc voitage source (Systron Donner
Model M107 or equivalent) to the DCY and Com leads
of the 410С.
с. Connect a dc voltmeter (-hp- Model 3466A or
equivalent) to the DC Amplifier Output terminals on
the 410C’s back panei.
d. The DC Amplifier Output should read 1.5 V dc
for each range with a full scale input. If the readings are
not correct for all of the ranges, check the input at-
tenuator/switching and feedback circuit paths for the
defective range(s). (The Systron-Donner Model M107
has a maximum output of 300 V dc so readings for the
500 V and 1500 V ranges will be less than 1.5 V dc unless
a higher de voltage source is used).
e. If all of the ranges read incorrect, check for +15
mV dc on pin 1 of the A3 board. If this reading is
wrong, check the input attenuator/switching.
f. If the reading at pin 1 is correct, short pin 11 to pin
7 on the A3 board. If the voltage on pin 7 reads +15
mV (amplifier gain of 1; normal gain of amplifier is
100), the feedback circuit is defective. If pin 7 does not
read +15 mY, op amp Ul is most likely bad.
5-47. Schamatic Diagrams.
5-48. The schematic diagrams (Figures 5-7 through
5-16) are divided into two groups: The Detailed
schematics and the Simplified schematics that show the
signal flow for the four measurement modes of opera-
tion (DCV, DCA, Ohms, and ACV). A pictorial wiring
of the Function and Range switches is also given.
5-9/5-10
| GHMS 5454
7%
|YOLTS £3
Gm
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4
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TEST CONDITIONS NOYE
VOLTAGE RESISTANCE Yoltages measured with 10
M ohm input resistance
FUNCITON: OLY INSTRUMENT: DEF уоНте!ег,
RANGE: ЧЕМ FUNCTION: * ВСУ
IRPUT: -.15Y RANGE: Gi5Y
REFERENCE: CIRCUIT INPUT: dDEY SHORTED
CROUND AD то сон
1100 5-6
Figure 5-8. Power Supply Measurements,
SWITCHES ARE SHOWN IN FULL CCW POSITIONS.
PIO = PART OF,
CAPACITANCE IN MICROFARADS AND RESISTANCE
IN OHMS, UNLESS OTHERWISE SPECIFIED,
EARTH GROUND, ds CHASSIS GROUND,
CIRCUIT COMMON {FLOATING GROUND].
„HM
<
= INDICATES AN ASSEMBLY. ALL
COMPONENTS LOCATED ON AN ASSEMBLY ARE
PREFIXED BY THE ASSEMBLY DESIGNATION {e.g., R3
ON ASSEMBLY A7 BECOMES AT7R3I,
GENERAL SCHEMATIC NOTES
i INDICATES SUBASSEMBLY.
7 — _——]—] a INDICATES DC FEEDBACK,
В. INDICATES PANEL ADJUST: % INDICATES
SCREWDRIVER ADJUST.
8, \J3L/INDICATES WIRE COLOR USING STANDARD
COLOR CODE. {e.g., 8 = WHITE, 3 = ORANGE, 7 =
VIOIET.}
10. * OPTIMUM VALUE SELECTED AT FACTORY.
AVERAGE VALUE SHOWN,
11. [71 INDICATES FRONT PANEL LOCATION.
=
k
— —
paa
LG
INDICATES REAR PANEL LOCATION,
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COPYRIGHT 1962 HT 7
HEWLETT- PACKARD CO,
A AHHH HPA e dls ee ia
AHO - + + DEA
Maintenance | о Model 410C
BOOT, ALC PROBE
11036-42101 TUBE SOCKET & CABLE ASSEMBLY
11036-62101
RETAINER RING
—— A10B-—21F
TT SPRING
1460-0006
DIODE CONTACT
\ | 3 4108-21 P—1
: GROUNDING CLIP
4108~—21H
SLEEVE
4108—21E
PROBE CONTACT BODY
11036-69507
PROBE HEAD
} 00410-42102
00410-827901
COAX CABLE
8120-0047
BOOT, AC PLUG
11036-42102
TELEPHONE PLUG
MAC 1251-0209
AC GROUNDING JUMPER
11036-89501
Figure 5-9. Model 11036A AC Probe (Exploded View).
AC PROBE
AS MODEL ¡IO36GA AC PROBE ASSEMBLY ee a te {300V MAX}
gr re rt He mn akt Sr pm ki pam == ST
i agpi | ut
2600P 27M и a
INPUT Г к “МУ — AD TO ASIA ROO)
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GROUNDING JUMPER
NOTES
1. Untess otherwise specified, resistance in ohms. Capacitance in
microfarads,
2 + value of ABC? includes probe lead capacity.
Зо. с == INCicates an assembly. Ail components located on any
assembiy are prefixed by the assembly designation {2.9., 81 оп
assembiy AS becomes ASR 1).
Figure 5-10. Model 11036A AC Probe Schamatic.
5-14
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5-17/5-18
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| 5-21/5-22
SECTION VI
REPLACEABLE PARTS
6-1. INTRODUCTION.
6-2. This section contains information for ordering
replacement parts. Table 6-3 lists parts in alphameric
order of their reference designators and indicates the
description, -hp- Part Number of each part, together
with any applicable notes, and provides the following:
a. Total quantity used in the instrument (Qty col-
umn}. The total quantity of a part is given the first time
the part number appears.
b. Description of the part. (See list of abbreviations
in Table 6-1.)
¢. Typical manufacturer of the part in a five-digit
code. (See Table 6-2 for list of manufacturers.)
d. Manufacturers part number.
6-3. Miscellaneous parts are listed at the end of Table
6-3.
54. ORDERING INFORMATION.
6-5. To obtain replacement parts, address order or in-
quiry to your local Hewlett-Packard Field Office. (Field
Office Locations are listed at the back of the Manual.)
Identify parts by their Hewlett-Packard Part Numbers.
Include instrument model! and serial numbers.
6-6. NON-LISTED PARTS.
6-7. To obtain a part that is not listed, include:
a. Instrument Model Number
b. Instrument Serial Number
. Description of the part.
d. Function and location of the part.
Table 6-1. List of Abbreviations.
AFENEVIATHORS
Ag aa A Hiver Me... ........._... инт OC IG IAE pur béton! NPG negalive pasiive ata aaa Hide
ALL LIL aa a a a a aa a ea Le 0 urine [ENTE tamphargiare comftorr) SPOT gia pola double: ro
A ее. MT a Цене с. . Pd Sura AE... с... MeBCIMeCAdie) + 10- veranda "El. . EM -poda emitir
Ay aora ae .. palit } . Impregratod AB HET EE Ry Teplice aa
mask INEA TA ee * rantatum
Lo. _ Cee аа CaCO ma = BT HC Er e fi Ca ca ea . eme! TÉ tormpbraiure COM CHEN
Br LLL . a селами ood... arde: "by seacriotica THI Tide dise
cor eoMtheia ко. . kiohmis} 104 3 ohms Où 1... outside cava. no CLL Rpg
com common kHz . Kilohwesz + 304 3 nerte E. e OEM
[ri E ee aa COMBE HOR p a a aa CL hak tee. a einer
DA COPEL gH be ee aaa . CE [7 Cas a .. - Mconmettois] TSTR transistor
in... ... Ca lar tapar ре. 2." ДЕЙ сне
dep deposited log 0. l6gorihmic tape A nieotardin! 10 $7 tara Yo .. fte
PET . rubi pute OH Are MYL RR aan 6 punt vera Da EC ahem ating everest working voltage
PST deutke-poir alngla- throw má .milomperela) = 197 1 ampery pre e ati ©! MEE ee a aaa манат
MHz Ca EGET 19+ 6 huerta nes . positronial wit wy - AUMER Lie чм фл таре
CI Alec rein Ma. 11 11112. moons) w NÓ org poly .. palvatyrana
епсер Co Engr HE ret fm . Metal diia per . POT rR VO aaa aaa . ow RE
mer. a ‚ ea aggre gp. .. PER:10-pai wr AE
Fo ao . ara) FH. LL La a a aa a an 1140 .. Melacono apm. PEE pi мани WEL aaa working inverse vote
FET. LL байт aHiect trannielos mig I Ca . . ME Dre . SRCHIEN (HT ELLE ZH, wo . . . ‚Witt
fae еее, o Hang АИ. ileal - 18 $ vous Img tar STARE and/or toltrincer MER aa WEE
uF a mrad frais)
Gardin Cea tian: a paride @& окон, HE fo seta
Git as gehen = 1649 hare WV LL «microvonta - o € мона mo. co . thodum
ad aaa - . CEE OCA MY LL La 14 0 . MyE Eee rout a. SOLANE Ne , ‚ репа VA ECT Al hector,
Ge Cee ea ee , germanium FETO aaa rotar average «aloe air part may be omiteedcl
gnad. LLL Гоа) РА Ma = 10.5 Ames * . . O Added {ype НЫЕ вул
NL ‚ PA Ey einen Se. . a aaa teta Andacht Or special! бу
H. Ce eae e hn es Ме .. +. FH seat Pet LL ee a ee IE RESTE)
HY. ee etary NO ‚oma span SI. LL 1100 con & Oupom de Namayrs
ELE
A am № AT + a ‚Ба TE... BTITENAT EIC
Bea ara aaa MD HR era РЁ Ш Вей... , VE oe Va aa . érgElrcun
BT еек. . .. hattary nw; a aa imograes Lrg Hip: realetoripéex) Vv, WRN 1 tubs, ron Вы, photo, e.
EL a LL 4 1 ed a aan au a + Capacite a ‚рб At Cre. Herero Ww, Ce aaa caia
EA aa aa "diode er 1hytiétoe KL 11 as ‚нау 5. . _. ‚+ Фа Е x. socket
LA KG dulby tine E Inder T aaa tral grngy WEE... IRDA
BE a .—.. mp BA aa aaa aa aaa ema MELO: ТВ. Аст! Бони! К uso
aaa misc alot ari {rect MP, 1.2... mechanical part TC .. thermocoupre LEE Soy
Esa o vo oo fuse Poo ны ТР. LLIN oo a Prat wir,
6-1
Replaceable Parts
Tables 5-2. Code List of Manufacturers.
Manufacturer :
Mo. Manufacturer Name Address
HSOZ7 Schurter AGH Luzern, SW
00853 Sangamo Elect Co. Pickens, SC 29671
01121 Allen-Bradley Co. Milwaukee, WI 53204
94713 Motorola Semiconductor Products Phoenix, AZ 85062
07088 Kelvin Electric Co. Van Nuys, CA 91401
07263 Fairchild Semiconductor Corp. Div. Mountain View, CA 84042
08806 GE Co. Miniature Lamp Proc, Dept. Cleveland, OH 44112
09023 Cometi-Dubilier Elek Div, Sanford, NC 27330
08134 Texas Capacitor Co, inc. Houston, TX 77036
10582 CTS of Ashevilla Inc. Skyiand, NC 28778
11507 TRW inc. Boone Div, Boone, NC 28607
14836 General Instr. Semicon Prod. Hicksville, NY 11802
15554 VEN Corp. Victoraen inst. Div. Cleveland, OM 44103
19701 Mepco/Electra Corp. Mineral Welis, TX 19701
26385 Gries Reproducear Corp. New Rochelle, NY 10802
26742 Methode Electronica Inc. Chicago, IL 60856
27014 Nati Semiconductor Corp. Santa Clara, CA 96061
28480 Hewlett-Packard Co. Corporate Ha. Palo Alto, CA 94304
28520 Heyman Mfg. Co. Kenworth, Nd 07033
30983 Mepco/Electra Corp. San Diego, CA 92121
34283 CTS of Brownsville Inc. Brownsville, TX 78520
56137 Spaulding Fibar Co. Inc. Tonawanda, NY 14150
56288 Sprague Electric Co. North Adams, MA 01247
70371 3-M Tech Caramics Products Div. Chattanooga, TN 37406
71400 Bussman Mfg, Div. of McGraw Edison Co. | St. Louis, MO 83107
71785 TRW Eleck Comp. Clinch Div. Elk Grove Vige, il. 60007
73138 Beckman inst. inc. Halipot Div. Fullerton, CA 92634
73734 federal Scraw Products Co. Chicago, IL 60818
753185 Littlefuse Inc. Das Plaines, il. 60016
76854 Cak Ind. Inc. SW Div. Crystal Lake, IL. 80014
78188 ifinois Tool Works Elgin, IL 60126
78553 Tinnerman Products Cieveland, OH 44101
82389 Switchcraft Inc. Chicago, {| 60630
83259 Parker Seal Co, Div. Parker Hannifin Lexington, KY 80231
84411 TRW Capacitor Div. Ogellata, NE 69163
81637 Dale Electronics Inc, Columbus, NE 68601
91280 Conner Spring & Mfg. Co. San Joss, CA 95112
87813 industrial Electronic Hardware Corp. New York, NY 10012
6-2
Model 410€
Table 6-3. Replaceable Parts
Reference HP Part с - ras Mir
. / D Qty Description Cod Mfr Part Number
Designation | Number ode
4100-1498 1 SWITCH ASSEMBLY: FUNCTION 28489 410C-198
#1 0737-0004 4 1 RIFXO © FLM $0 4 1% 1/7 $1637 DES-1/7-15
#2 0727-0480 i 1 RIFXD € FLM 2.32 MR + 1% 0.5wW 41617 DES-1/7-717264-F
RI, Re NOT ASSIGNED
RE 0587-5661 1 2 RIFXD COMP 56 MO + 10% 1/24 011721 535661
Ré 2100-5385 H 1 RIVAR WW LIN 10 KG 1 10% iw 62450 AN
RT 0687-1511 1 1 R:FXD COMP 15 X + 10% 1/24 01171 ESISII
RE, RE NOT ASSIGNED
Rig 9727-6474 4 1 RIFXD © FiM 250 0% 16 1/3W 41837 Оса РИ? 2 5] „Е
Si 3100-2383 L 1 SWITCH: ROTARY k=SECTIÓN E-POSITION 76854 5-hHh54I=56%
{FUNCTIONS |
#10C-1GA SWITCH ASSEMALY: RANGE 78480 4195 -19А
Ri 0718-0604 4 2 RIFAD € FLM 1 0 2 14 1/24 91637 DES-1/7.15
#2 0777-0955 4 1 R:FXD € FLM 10.5 0 € 1% 1/24 936357 D{S-1/2-15
RE 0728-0004 4 RIFXD € FtM Y Q + 34 1/2W 91657 1DCS-1/2-15
#0 0733-0015 1 1 RIFXD C FLM BG MO + 1% 24 18554 AX-5
RE NOT ASSIGNED
RE 0687-1031 1 1 R:EXD COMP 16 KA + 10% 1/24 61121 ERIN)
#7 0727-0478 4 1 R:FXD C FLM 2.21 MO = ES 1/3w 41637 DCSI/2-2214.F
BE, RS NOT ASSIGNED ;
RIO 0710-8176 4 1 R:FXO 6 MO + 4.5% IW 916357 OCi-6004-0
Rit 0727-0455 1 RiFXE © FLM 2 MO = 0.5% 16 91637 DC1-20046—5
#12 0777-0658 k 1 RIFXD © FLM 700 КО + 6.6% 1/24 91657 DCS1/2-7903-D
Rt3 0727-0457 4 1 RIFXD £ FLA 208 KO € 5% 1/24 $16%7 DCS1/2-2081.D
Ril 9727-0456 4 1 R:FXD C FLM 70 KR x: 6.5% 1/24 91517 DCS1/2-70562-D
£I5 0727-0455 $ 1 RIFAD C FLM 20 KO z 6.5% 1/7 916%7 0CSt/2-2952-5
RIÓ 0727-0451 4 3 R:FXD C FLM 19590 A 4 0.5% 1/24 915% 7 DES1/2-1051-D
Ri? 0777-0454 4 1 RIFXAD £ FLM 5000 6 + 0.5% 1/2W 91657 OCE1/2-6001-D
RIÓ 0727-0451 4 L RIFXD C FLM 2509 £ + 0.5% 1/26 91637 OCS1/2-70501-5
RIO 0777-0452 4 1 R:FXD OC FLM 790 0 1 0,9%1/2#W 31637 DCS1/72-701-5
E20 0727-0455 4 1 RIFXD C FLM 200 § 4 0.5€ 1/24 91637 bC51/2-201-0
R21 0777-0444 44 1 RIFXD © FLM TOR + 1% 1/24 31637 DCS-1/72-13
R22 9727-0698 4 2 R:FXD C FLM 20 8 + 1% 1/28 91637 DCST/2-20RD-F
R23 0727 - 0655 4 t RIFXD C FLM 7 8 3 14 1/24 91537 DES=1/7-15
Rè4 0777-0445 4 i RIFXD © ELM 2 8 £ 14 1/24 91637 DES.1/7-15
#25 4100-268 i RIFXD 5.7 À 78480 4100-7268
276 H10C-7?5A 1 R:FXD 6.3 À 28430 L1GC—25A
REY THRU R29 NCT ASSIGNED
#35 0727-0791 5 1 R:FXD C'FLM 845 CO * 1% 1/24 81637 DCS-1/2-EU5R"F
R31 0727-0031 4 1 RIFXO C FLM 60 Ñ x: 1% 1/28 91657 DCS-1/2-15
REZ 0727-5448 4 R:FXD € FLM 20 9 + 1% 1/24 41537 DCOS-70R0-F
R33. 9727-0948 4 1 R:FXD C FLM 10 Q = 1% 1/2 41637 DCS1/2-10R0-F
Ryan 0687-1013 1 1 RIFXD COMP 100 £ + 160% 1/24 Bilz! EBL}
si 3100-0382 1 1 SWITCH: ROTARY S-SECTIÓN EI1-POSITION 76854 455354551
(RANGE)
20415-66562 ï ASSEMBLY; AMPLIFIER 28480 0O410-65507
CB 0160-2208 7 в EIEXO 100 PE ЗОбУ 90853 KDM1SF101/43€
ci 0150-4407 3 3 C:FXD .IUF ,19 100V 84411 HÉWUHÉ
cti 0160-4407 3 t C:FXD L1uF .1% 190 B44il HEVWH LÉ
CRI 1901-0040 at 2 DIGDE: S1 .05A 30V 07763 FOHLUBE
CH? 1901-0040 6 DIODE: 51 ,054 30V 27563 FOr OBS
CR 1902-0555 9 L DIODE: BREAKDOWN 20V 5% 04733 5213213227
CRY 1902-0202 q ! DIODE: BREAKDOWN 15V 5% BTL 871121%-191
Ei 2110-9867? $ i FUSE! 1/8 A 75915 276.175
©} 1855-0256 #6; 1 TRANSISTOR: JFET DUAL N-CHAN 27614 SFBIO75
Ris 9811-2845 2 4 A: FXD 24,57K ,075% ‚25W 57088 КР:
#5 0811-2646 2 R: FXD 24,97K ‚025% .25W 07088 EPIJO
RG 2100-3124 7 1 Ri: THMR 180 10% 17 TURN 75158 SYPRIDO
#7 1698-7875 9 } R: FXD 23.69К .1% .125W 19791 MERO 1/B-T2-13691-8
RO 0688-6373 4 1 A: FXD 100 ‚1% ‚125W $1637 CME mB Em] Trg
R190 9811-2845 2 2: EXD 24.97K ‚025% ‚25% 97088 XP130
#1: 0811-72845 2 A: FAD 24,97K (025% .25W 07088 «P13È
Ri? 7100-1103 2 1 A: TRMR 10% 10% 17 TURN ?%138 BIPRIBK
#13 0757-0401 q 1 RI FXD 100 1% .175W 14721 MFYC~1
Ris 0698-5618 2 1 R: FXD В? &% 2% 11582 05-3
#30 2100-3854 7 1 я; TRMR 72.5M 25% 1-TEN 30983 BOL7SMW2, 5H
#31 2100-3428 2 1 я: TEME 20 10% 1-TRN 73138 72XR28
#3? 0683-6245 1 1 R: FXD H70K 5E 754 0:171 CBÉ745
xs 0683-1055 1 1 R: FXD IM 5% .25W OIILA1 CB1b55
R34 0683-6725 1 2 R: FXD 5.2K 5% ,25W OLI: CB6E225
R35 0682-6225 1 R: FXD 5.2K 5% ,254 OLIZI CBÉ225
#36 0683-1025 1 1 К: FXO IX 5% ,25W FC TC=480/+600 riz} CRIGES
из 1826-0035 5 i IC OP AMP 22018 LM3 DRAM
See introduction to this section for ordering information
"Indicates factory selected value
=
Table 6-3. Replaceable Parts (Cont'd).
Reference
HP Part lc Q D as Mr
: escription Mfr Part Number
Designation | Number ¡D ty P Code
Al, AS NOT ASSIGNED
АБ 410C-£3R ASSEMELY: CALIBRATION 78480 H10C-658
CRI 1981-0025 6 + DIODE: $1 50 MA 97763 FOUS3E
e 0727-9751 4 } RIFXD © FLM 10080 0 2 1% 1/24 51637 65-1/7-15
R2 NOT ASSIGNED
RS 2109-0394 4 5 RIVAR W LIN 360 à + 20% iw 10587 SERIES 110
Ria 2787-0747 $ ? R:FXD © FLM 750 QG : 1% 1/2 HLEZ7 $ DCS1/2.751-F
RE 2100-0484 4 RIVAR we LIN 180 $1 2 20% JW 20287 SERIES 119
Ré 0728-00: 1 4 ; R:FXD OC FLM 360 2 x 1% 1/24 91637 1 5651/72-351-F
#7 2190-0394 4 VAR WW OLIN 380 9 + 20% 184 1557 | SERIES 110
RA 6728-0010 $ 1 RIFXD CO FLM 270 Я = 1% 1/24 81677 |DCS-1/2-15
RY THEY R1% NCT ASSIGNED
R 2100-4390 4 RIVAR WW LIN 360 & + 20% iw 10582 SERIES 116
#15 NOT ASSIGNED
RIB 0598-5565 4 1 R:FXD 8,25% 14 ,25W 91617 $CMP-60-1,T-9
R17 5727-0856 4 1 RIFXD C FLE 180 1 + 1% 1/2w $1617 EDCSI/2-10R(-F
RIE 2100-0398 4 RIVAR WN LIN 108 © : 20% IW 16582 ESERTES TtO
Rig NOT ASS IGRED
R20 1 RIVAR COMP LIN 300 € + 20% 1/kW
RT: 0727-0475 A 1 R:FXD C 870 Mr 0.5% 1/2 91037 Pols-1r2-15
A7 410C-65E ASSEMBLY: POWER SUPPLY 28486 UIEC-65E
Cin 140-0025 7 i CI FXD MICA 66PE Í$10% 500 МОС 08851 RCHISEGSOK
CRI TRRU CRS NOT ASSIGNED
LRA 1507-0076 2 1 DIODE: BREAKDOWN 36.5V 110% 0.64 64713 S770916-1445
CRY 1902-3149 5 1 LODE. BREAKDOWN 9.09v 5% DO-7 02713 $7210016-179
CRE 1902-0048 2 1 DICE: BREAKOOWN 6.81 5% DO-7 0L711 SZ30016-134
Sin 1751-0711 4 1 CONNECICR: 15 PIN РС 26742 91-é015-170ÿ-2ED
RI,R2 0764-0003 2 7 R: FXD MET FiM 1300 45% ZW 14502 6-3
R3 0787-0757 9 1 R: FAD 154 14 2254 18701 MESIC-1
RY 0784-0026 2 3 В; Ful MET ELM 13X FRY ZW 11507 65-3
5, ВБ NOT ARS IGNED
RE 0757-0311 9 1 Ri O FXO 3501 14 764 -187h1 MF52C-1
RU NOT ASSIGNED
RIN 9757-0708 9 } в: FxD MEY ®LM 68,1 1% ,75% 19781 МЕб2С-}
AR 110764 ASSEMELY: AL PROBE (HP MODEL 110164, 28480 1191GA
COMPLETE?
cl NOT SEPARATELY REPLACEABLE, PART OF AC
FROBE C11635A)
e? NOT SEPARATELY REPLACEABLE, PART OF AC
PROBE CILOIDA)
Pl 1251-0709 5 1 PLUG! TELEPHONE 3 CONDUCTOR 87389 !2P-1287
RI NOT SEPARATELY REPLACEABLE, PART OF AC
PROBE CIIOIGA)
vi 00MIN-87901 TUBE: ELECTRON OÍODE 28480 00410-82890}
ci 0170-9571 3 ! £:5XD му 6700 FF : 10% LOD VOCW Вера Безо Ч 294
©? 0179-0922 6 t C:FXD MY 0.1 LF +1 15% 600 VDCW 08730 $ TYPE 24
ca 0159-0923 2 3 CIFXD CER 2000 PF : 20% 1000 YOCW 56289 | 20C7Z95A2-CDM
CH KOT ASSIGNED
£5 8180-0025 2 i C:FXD AL ELECT 5X20 UF +50% -104 450 VOCW 56289 ]D324520FP
cé 180-0183 2 1 C:FXD AL ELECT 2X1200 pr +100% -10% 56789 103710%0FP
20 VDCH
CRI, (RZ 1801-0036 t 1 DIODE HY RENT (KY ECOMÁ 15936 PMPLOG
CRI, CRL 1901-0045 a 3 DIODE: PWR ВЕСТ 50V 750MA 04713 1 SR1738-6
psi 2140-0456 0 1 LAMP = INCAND E.1 YOC GOMÁ 08805 1380
Fl 7110-0201 t FUSE: 0D. E84 750V 71496 {1MDbL=1/4
М 1251-0200 5 t JACK: TELEPHONE $ CONDUCTOR 82389 | TU-178LA
Jz ASSEMBLY: 04 AMPLIFIER OUTPUT (SEE
MISCELLANEOUS FOR PART NOS.
J3 1251-7357 5 t CONNECTOR: POWER CORD RECEPTACLE 82389 | EAC-501
MI 13280-8317 1 METER: 0-1 МА 28680 1120-0517
01 1853-0061 0 1 TETRA: SI PNP 0h713 } 5V7h07
6-4
See introduction to this section for ordering information
*Indicates factory selected value
Table 6-3. Replaceable Parts
(Cont'd),
Reference HP Part ‘с o a: Mfr
: . t Description Mfr Part Number
Designation | Number (Dj “Y puon Code
AS (CORT'DD
#1 0727-0278 4 ] R:FXD © FLM 1 MO + 1% L/2W 51637 DCSL/2-10048+F
RZ 0757-0403 q 1 RIFXD 106 1% „125% 19703 MEC. 1
RI 2100-0415 ú 1 R:VAR WW LIN 25 & 4 109 ZW 10587 117
RY, mG NOT ASSIGNED
#6 0727-0731 4 : RIFRO- -286kK + G.e% [7/74 41637 DCS-i1/7=1%
By 5777-0188. ta I R:FXD 15k-4.1% 1/74 91537 DES.=1/7-15
#8 2105-1557 4 1 R:TrRME 10k 10% 18587 117
RO 0727-0180 4 L É:FXD 25.5 91637 DES-1/2-15
$1 2191-1268 1 } SWITCH: SPST PUSHBUTTON (LEINE) 76854 5$3-5$480-141-ALM
$7 3101-1735 5 1 SWITCH: DPOT SLIDE CSLECTORD 81388 L1A-1 842A
Ti 9100-0175 2 TRANSFORMER: POWER 115/250Ÿ 28480 9106-0174
Wl BE126-1348 2 1 CABLE: POWER 3 CONDUCTOR 7-1/2 FT. LONG 28480 8120-1148
x] 1700-0044 3 1 SOCKET: TRANSISTOR To-3 97911 LSTLSOZ.3
See Introduction to this section for orderin
*Indicates factory selected value
g information
Table 6-3. Replaceable Parts (Cont'd)
Reference
1498-0831
HP Part ic a gt Mfr
: . t Description Mir Part Number
Designation | Number |0 y p Code
MISCELLANEOUS
1430-5088 e 1 CLIP: GROUND 71785 477-17-11-085
150-0985 ? 7 BINDING POST 76486 1510-0684
1513-5687 2 1 BINDING POST ASSEMBLY 75488 1519-0067
0340-0737 2 5 INSULATOR BINDING FOST 26480 [0340-0737
11036-42102 t 2 3 (BOOT: AL PLUG (P/O 1:038AD 78488 11016-42102
110%6-#2151 | 2 1 B00T: AC PROBE (P/O 11036A) 285680 11076-471001
HIZA-BÍA 2 3 3007: CABLE ЗЧ С Li2A-B1A
HIOC- 1723 2 1 BRACKET: SWITCH CUSED WITH A5 CONNECTORS 2E4E0 LigC-178
0040-0702 3 BRACKET: COVER RETAINER 2848 DONIO-091702
HICO-17A 2 1 BRACKET: CONNECTDR (USED WITH AS CONNECTORII 78480 H10C-174
1200-0081 1 7 BUSHING: INSULATOR CUSED WITH Q1) 26165 974 SPECIAL
1415-0081 1 % BUSMING: PANEL CUSES WITH ALSI AND А?257) 28570 58 -437-h
0400-0819 2 3 RUSHING: STRAIN RELIEF 28429 0405-0013
Liat -1A 2 CHASSIS: TRANSFORMER 28480 4100 -1A
- UlTDA-21h 2 1 CLIP: GROUNDING (P/O 1103645 28485 1410B4ZIH
UIDB-ZIP 7 1 CONTACT: DIODE CP/O 11056A) 18480 5I0B-71P
3150-0038 1 i COUPLER: SWITCH-ROTARY 76854 130501-#3
5000-8565 i COVER: SIDE 78480 5000-8565
90419-64192 i COVER: TOP (REQUIRES 7 BRACKETS 00410-01202? 284805 00410-641002
EOOC- 8571 1 COVER: BOTTOM 28480 5500-8571
5065-9727 7 FOOT ASSEMBLY 28460 5560-0727
3955-0785 7 FRAME: SIDE . 728430 5060-0703
3040-0700 2 HINGE (USED WITH TILT STANDS 78480 5040-0700
1606-9089 1 INSULATOR: CLIP {P/O IIDIBA) 28480 1400-0089
9359-5086 1 INSULATOR: BINDING POST DOUBLE 28480 0340-0086
5340-0091 1 INSULATOR? BINDING POST TRIPLE 28495 5340-0891
1526-5601 É 7 INSULATOR: CAPACITOR (USER WITH Ct-C25 56117 ХР
8340-9607 9 1 INSULATOR: CERAMIC STANDOEF 70371
5370-0117 2 1 KNOS: BLACK SAR CONCENTRIC 28485 0170-0117
6170-0113 2 1 KNOB: BLACK BAR W/ARROW 28480 4370-0115
8470-0114 2 1 KNOB: RED W/ARROW ? ALBO 0370-0116
6360-0016 a 1 LUG: SOLDER LOCK 4% 78183
0360-3007 Ë % LUG: SOLDER #10 78189 2501-10-00
9360-0057 8 2 LUG: SOLDER 90° 78189 cat
7760-0001 i NUT! HEX 4-40 X 1/4 IN. 78550 7260-0001
2470-9001 0 4 HUY: HEX 5-37 X 5/16 IN, W/ LOCK 78555 :
2820-9001 5 3 MUT! HEX 10437 Хх 3/6 18. 237 55 080
2350-0096 5 3 BUT: HEX 1/6-37 X 3/8 IN. 73730 005
2550-0501 5 3 WUT: HEX 378-32 X 1/2 IN. 71734 08D
2950-0937 в 3 NUT: HEX 1/2-16 X 11/16 IN, 7E553 CEBON-A32-2hA
2350-0038 5 i NUT: MEX 172-724 x 11/16 IN, 15915 9095-12
9590-00959 La % NUT: SPEED 6-37 7 7855 % Ct890-632-1
6590-6552 0 7 NUT: SPEED 6-12 78553 C8520-542-4
100 - 41 А 1 PLATE: INSULATOR (USED WITH AlS1 AND A252) 78480 LipC ~hlA
0340-9580 1 INSULATOR-XSTR THRH-CNOCT 28480 846-0580
1251-0209 5 i PLUG: TELEPHONE CP/O 1103045 87365 2Р-1297
00#1ÿ-hk213; 1 PROBE: CONTACT BODY {P/O 116384) 29H69 OA 10-47101
QO4IO-h7197 ! PROBE HEAD (P/O 110564) 28480 OO i0=42102
410B-21F i RING: RETAINER (P/O 11036A) 78480 4 TOB.21F
2205-0006 5 7 SCREW: MACHINE 42-40 X 3/8 IN RH 75734 080
2206-0014 5 ya SCREW: MACHINE 5-40 X 9/15 IN RH 734 085
2375-0901 5 23 SCREW! MACHINE 6-37 Хх 1/4 IN. RH 371% 985
2390-0607 5 4 SLREW! MACHINE 6-37 X 5/16 IN BH W/LOCK 73734 ABD
2370-6007 5 8 SCREW: MACHING 6-2 X 5/8 IN FH 147138 SD
2570-0803 5 2 SCRFW: MACHINE 6-32 X 1/7 iN FH 73734 GBD
410B-21E i SLEEVE CP/O L1036A) 28:86 4108-21E
1560-0506 e ] SPRING: DIODE CONTACT CP/O 1103643 31260 CBE
5 1 STAND: TILT 91250 ово
6-6
See Introduction to this section for ordering information
*Indicates factory selected value
Table 6-3, Replaceable Parts (Cont'd).
Reference HP Part ic Q at Mir
Designation | Number |p| QtY Description Code Mfr Part Number
UISC-56A 2 SUPPORT: CIRCUIT BOARD (USED WITH АЗ) 28480 4IBC-66A
H18C-215 i TEST LEAD ASSEMBLY: COM 28450 4160-71D
HIDC-71C 3 TEST LEAD ASSEMBLY: DCA - ОНМ$ 23430 HIOC=71C
#18C-21A 1 TEST LEAD ASSEMELY: DCV CINCLUDES R1D 28480 HIOC-21A
5028-6957 } TRIM: METER 28480 5070-6852
11956-52101 1 TUBE: SOCKET AND CABLE ASSEMBLY 28580 11035-62161
(7/0 118IBAJ
3050-0065 5 7 WASHER: FLAT {6 73744 08D
3956-0067 5 3 WASHER: FLAT 3/8 IN, ID 7573k ono
6900-5016 3 1 Ü-RING: FUSE HOLOER 83250 2-112-N574-70
2196-5005 ë 2 HASHER: LOCK 15 EXTERNAL 78189 080
2340-0004 8 2 WASHER: LOCK 4b INTERNAL 78188 SF1904
2190-000% 8 2 WASHER: LOCK 4h SPLIT 78199 GED
2150-0047 E 30 WASHER: LOCK #6 COUNTERSUNK 78188 DBD
2196-0011 8 2 WASHER: LOCK 430 INTERNAL 78186 1510
2190-0028 E 2 WASHER: LOCK 410 INT/EXT 78:88 4010-18-00
2190-9527 8 3 WASHER: LOCK 1/4 IN INTERNAL 78180 191H
2196-0822 8 4 WASHER: LOUK 3/2 IN 1D 78188 1928
2190-0037 8 2 WASHER: LOCK 1/2 IN INTERNAL 78129 1224-08
1400-0090 5 1 WASHER: NEOPRENE 75915 901-2
2529-0008 1 NUT-HEX-W/LEWR §-30-THD 00608 ORDER BY DESCRIPTION
0360-0014 i BARRIER BLOCK 2-TERM GA! PHEN 28480 0569-0014
00410-002272 1 PANEL: REAR 28480 00410-060777
00410-007273 1 PANEL: FRONT 28489 00410-082221
00410-012413 1 BRACKET: CONNECTOR CUSED WITH AÏ CONNECTOR] 28480 NO510-51211
8150-0022 1 WIRE: REO 5 IN 28480 8155-0022
4150-0037 1 WIRE: WHITE/RED 5 IN 28480 8150-0037
2150-0036 3 WIRE! WHITE/ORANGE 5 IN TELED 8150-5076
4150-0040 1 WIRE: YELLON/WHITE $ IN 28480 5150-0040
0370-1095 1 КМОВ-ВАЗЕ 1/2 OBP .75-IN-1D 78480 0376-1095
2190-5027 ! WASHER: LK INTL T 3/8 IN 785830 2150-5027
2950-2081 2 NUT-HEX-DBL-CHAM 3/2-32-<THD 25050 ORDER AY DESCRIPTION
2110-0564 $ 1 FUSEMOLDES BODY I7A MAX FOR ul 06378 037.165
2110-0565 1 FUSEHOLDER CAP 124 MAX FOR UL 725485 7110-0565
2110-0569 1 FUSEHDLDER NUT 124A MAX FOR UL 78480 2110-5569
1450-0090 : FUSEHOLDER COMPONENT FOR USE GN 28680 1460-5649
See introduction to this section for ordering information
*indicates factory selected value
6-7/6-8
ГУ Paciano
Reorder No. or
Manual Part No.
00410-90009-E0381
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