Hewlett Packard 432B Power meter Manual supplement

HP 4328
MANUAL
SUPPLEMENT
USE THIS SUPPLEMENT WITH
MANUAL PART NO. 00432-20009
PRINTED JUNE 1972
Г/г HEWLETT
PACKARD
acer dE
CERTIFICATION
Hewlett-Packard Company certifies that this product met its published specifications at the time of shipment from the
factory. Hewlett-Packard further certifies that its calibration measurements are traceable to the United States National
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 instrument product is warranted against defects in material and workmanship for a period of one
year from date of shipment, During the warranty period, Hewlett-Packard Company will, at its option, either repair or
replace products which prove to be defective,
For warranty service or repair, this product must be returned fo 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.
HP warrants that its software and firmware designated by HP for use with an instrument will execute its programming
instructions when properly instailed on that instrument, HP 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 appiy to defects resulting from improper or inadequate maintenance by Buyer,
Buyer-supplied software or interfacing, unauthorized modification or misuse, operation outside of the environmental
specifications for the product, or improper site preparation or maintenance.
NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. HP SPECIFICALLY DISCLAIMS THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
EXCLUSIVE REMEDIES
THE REMEDIES PROVIDED HEREIN AREBUYER'SSOLE AND EXCLUSIVE REMEDIES. HP SHALL NOTBE
LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.
ASSISTANCE
Product maintenance agreements and other customer assistance agreements are available for Hewlett-Packard
products.
HEWLETT-PACKARD SERVICE OFFICES
To obtain servicing information, contact the nearest Hewlett-Packard Sales and Service Office in HP Catalog, or
contact the nearest regional office listed helow,
UNITED STATES
NO. CALIFORNIA (San Francisco Area)
333 Logue Ave.
Mt. View, CA 94048
SO. CALIFORNIA (Los Angeles Area)
5400 West Hosecrans Blvd.
Lawndale, CA 90260
GEORGIA
454 Interstate N, Parkway
Atlanta, GA 30348
ILLINGIS
3201 T'oilview Dr,
Rolling Meadows, IL 60008
NEW JERSEY
W. 120 Century Rd.
Paramus, NJ 47652
AUSTRALIA
Hewlett-Packard Australia Lid,
31-41 Joseph Street
Blackburn, Victoria 3130
CANADA
Hewlett-Packard (Canada) Ltd.
6877 Goreway Drive
Mississauga, Ontario
Canada [4V IMB
ITALY
Hewtett-Packard Italiana S.p.À.
Via G. Di Vittorio, 8
20063 Сетпивео
Sul Naviglio {MI}
FRANCE
Hewlett-Packard France
Quartier de Courtaboeuf
Boite Postale No. 6
F-91401 Orsay Cedex
GERMAN FEDERAL REPUBLIC
Hewlett-Packard GmbH
Vertriebszentrale Frankfurt
Bernerstrasse 117
Postfach 560 140
16000 Frankfurt 56
NETHERLANOS
Hewlett-Packard Benelux № У.
Van Heuven Doedhartiaan 121
Р.О. Вох 887
NL-Amateivean 1134
UNITED KINGDOM
Hewlett-Packard Ltd,
King Street Lane
GB-Winnersh, Wokingham
Bers, RG11 SAR
AFRICA, ASIA, CENTRAL AND
SQUTH AMERICA
Hewlett-Packard Intercontinental
3200 Hillview Avenue
Palo Alto, CA 94304
MANUAL SUPPLEMENT
SERIAL NUMBERS
This supplement applies directly to instruments
with serial numbers prefixed 2130A.
With changes described after the Replaceable
Parts table, this supplement also applies to instru-
ments with serial numbers prefixed 0933A, 1140A,
1141A, 1206A, 1512A, 1528A, 1541A, 1714A,
1736A, 1830A, 1913A and 1930A.
For additional important information about serial
numbers, see INSTRUMENTS COVERED BY
SUPPLEMENT in paragraph 4 of this manual.
[3
HEWLETT
PACKARD
© Copyright HEWLETT-PACKARD COMPANY 1976, 1979, 1980, 1983
1501 PAGE MILL ROAD, PALO ALTO, CALIFORNIA, U.S.A.
SUPPLEMENT PART NUMBER. 00432-90053
Microfiche Part No. 00432-90054 Printed: MAY 1883
Model 4328
1. GENERAL INFORMATION
2. Description
3. The Hewlett-Packard Model 4328 Power Meter
is a digital readout version of the HP Model 432A;
the only electrical and mechanical differences
between the two instruments are changes that
were made to accommodate the Digital Panel
Meter Assembly M1.
4. This supplement is intended to be used with
the 432A Operating and Service Manual and cov-
ers changes necessary to document the 432B, This
supplement applies to instruments with the serial
number prefix listed on the title page. When the
instrument serial number prefix is higher than the
prefix listed on the title page, a yellow “Manual
Changes” sheet is provied to update the supple-
ment. With the backdating changes described
after the Replaceable Parts table, this supplement
also applies to instruments with serial number
prefixed lower than the prefix listed on the title
page.
5. Accessories
6. Accessories supplied with, and available for,
the 432B Power Meter are the same as those for the
432A.
7. Options
4. Options for the 432B are the same as those for
the 432A except that Option 001, rechargeable bat-
tery, is not available.
Page 5
9. INSTALLATION
10. Installation procedures for the 4325 are the
same as those for the 432A except for those that
deal with internal battery operation.
NOTE
The rear panel fuse, F1, is labeled with
the international designation mAT. It
means milhamp, sio-blow. À 125 mAT
fuse is the same as an 1/8 A slo-blow.
11. OPERATING INFORMATION
12. introduction
13. The 4328 operates the same as the 432A with
the following exceptions:
1. No battery operation.
2. Ranges are 10 and 100 uW, 1 and 10 mW.
3. Greater meter accuracy (see Table 1).
4. BCD output at rear panel.
14. BCD Output
15. J6, on therear panel, provides a Binary Coded
Decimal output that duplicates the reading of the
digital panel meter. The information isin an 8421
BCD code (1 = high) and is TTL compatible.
“Print” and “Hold” ines are available (see Table 9
and Service Sheet 4). The output is directly com-
Table |. HP Model 432B Specifications
Instrument Type: Automatic self-balancing power
meter for use with temperature-compensated ther-
mistor mounts.
Power Range: 40 dB with full-scale ranges of 10 and
100 UW, 1 and 10 mW.
Accuracy:
instrument Uncertainty: 0.5% on 100 uW and 1
and 10 mW ranges, 1.0% on 10 uW range
(20° — 30°C).
+1.5% max. on all ranges (0 — 55°C) 1.0%
typical.
Zere Uncertainty: + one count on all ranges.
Noise: Less than 0.25% of full scale peak.
Response Time: 35 ms time constant at recorder out-
put (typical),
Fine Zero: Automatic, operated by front panel switch.
Zero Carryover: Less than 0.5% of full scale when
zeroed on most sensitive range.
Calibration Factor Control: 13-position switch normalizes
meter reading to account for thermistor mount Cali-
bration Factor. Range 100% to 88% in 1% steps.
Meter: 3 digits with 1 digit overrange. 20% overrange
capability on all ranges.
Power: 115 or 230 Vac £10%, 50 10 400 Hz, 8W.
Weight: 3.12 kg (6 1b, 14 oz).
Bimensions: 295 mm {11-5/8 in.) by 130 mm (5-1/8 in.)
by 165 mm (6-1/2 in.).
Page 6
patible with an HP 5150A Thermal Printer using
an HP 562A-16C interface cable. The “Print” out-
put signifies that data is ready by a transition
from a logical 1 thigh) to a 0 (low) at J6 pin 48. A
logical 0 at J6 pin 47 (the “Hold” input) holds the
data from the last full conversion in the output
register, while a logical 1 or open circuit allows the
register to be updated.
NOTE
The HP 1251-0086 plug (Amphenol and
Cinch part number 57-30500-375) mate
with the BCD output connector, J6.
16. DIGITAL PANEL METER
17. The Digital Panel Meter Assembly MI, con-
sisting of three separate circuit boards, contains
an analog-to-digital converter and a solid state
display. Digital panel meters in instruments with
serial numbers prefixed below 1930A are self-
contained units and are not field repairable. A
Digital Panel Meter kit (HP part number 00432-
60116) is available for use as a replacement if the
self-contained panel meter is found to be defective.
18. PRINCIPLES OF OPERATION
19. The 4328 is the same as the 432A except that
the Digital Panel Meter Assembly M1 accepts the
analog information from the Meter Logic Assem-
bly A2. The operation of the Thermistor Bridge
Assembly Al and the Meter Logic Assembly A2 is
the same in both instruments. The power supply
transformer Ti, in the 432B, has additional wind-
ings to provide power to the digital panel meter.
20. The Digital Panel Meter Assembly M1 con-
sists of three circuit boards: The Display Assem-
bly (M1A1), the A/D Converter Assembly (M1A2),
and the Demultiplexer Assembly (M1A3). The
A/D Converter Assembly accepts analog data
from the Meter Logic Assembly A2 and converts it
to BCD. The Display Assembly provides a visual
representation of the BCD digits. The purpose of
the Demuitiplexer Assembly is to latch the BCD
data in a parallel format. This permits the Power
Meter to be used with a 5150A Thermal Printer or a
computer interface.
21. A/D Converter MIA2U1 samples the analog
output from the Meter Logic Assembly A2 and
converts it to digital data in a Binary Coded
Decimal (BCD) format, BCD data bits from the
A/D Converter are applied to the 7-Segment De-
Model 4328
coder M1AZ2U2. UZ decodes the BCD data to a
7-segment code. The 7-segment code lights the cor-
rect LED of the display for decimal digits 0
through 9. The Decoder will not decode binary
values greater than 9.
22. Digit Select lines DS1 to 4 from the A/D Con-
verter enable the appropriate display to accept the
7-segment code, lighting the correct LEDs to dis-
play the digit. The Digit Select lines also go to the
four Demultiplexer Latches M1A3U1 through U4
to clock the BCD bitsinto the correct D flip-flop for
the units, tens, hundreds, and thousands digit.
The BCD data then goes through CMOS-TTL
buffers to Output Registers M1 A3U8 and U9. The
digital data from Output Registers is available at
rear panel conenctor J6.
23. A/D Converter M1A2U1 compares the un-
known analog voltage V to the reference voltage
Vruy. The meter reads full scale when the two
voltages are equal. When the analog voltage is less
than the voltage reference the meter reads less
than full scale.
24. Clock M1A2U3 enables the A/D Converter.
The Clock functions as a free running, astable
multivibrator. The frequency, which is approxi-
mately 80 kHz, is set by R1 and C1.
25. An A/D conversion is completed in approxi-
mately 250 ms. An End of Conversion (EOC) pulse
1s generated at the completion of each conversion
and applied to MI A2U7D and Mi AQUI pin 9. The
EOC output ofthe A/D Converter (pin 14) is gated
with the output of MIA2U4B at NAND gate M1
A2U7D. In local and remote operation, the Exter-
nal Trigger and Hold inputs to the Power Meter
are both high. Therefore, the Set input to
M1A2U4B (pin 7) is high and the pin 1 output is
also high. When a high EOC pulse is combined
with the high output of pin 1, the output of NAND
gate M1 A9U7D is puised low for the time the EOC
pulse is high. This pulse is inverted by M1A2U7C
and applied to CMOS-TTL Buffer M1A2U10. The
output of the buffer 1s a TTL positive pulse that
clocks the new power level reading into Output
Registers M1A3U8 and U9. The high output of
Inverter MIA2U7C is also connected to the Reset
ofthe J/K Flip Flop but has no effect since the Set
input remains high, until set low by an external
input to pin 47 of J6. When the EOC pulse to the
NAND gate goes low, the output of the NAND gate
goes high. This output is inverted to low by
MIA2U7C until the next A/D conversion is com-
Model 4328
pleted. Therefore, each time the A/D Converter
generates an EOC pulse, the power measurement
data is ciocked into the Output Registers on the
low-to-high transition of the pulse. The high-to-
low transition of the EOC pulse indicates that
data is ready on the “Print” output line, J6 pin 48.
26. The A/D Converter continues to make analog
to digital conversions every 250 ms, and to update
the display when the Hold input (J6 pin 47) 1s iow.
However, when the Hold input is low the power
measurement data displaved at the end of each
conversion 1s not clocked into the Output Regis-
ters. The data information available at connector
J6 is thedata clocked into the Output Registers on
the first conversion after the Hold input was set
low.
27. A low Hold input pulls the Set input to
MIAZU4B low. When both the Set and Reset
inputs are low the output on pin 1 remains high.
When a high EOC pulse is gated with pin 1, the
output of NAND gate M1AZU 7D is low. M1AZ2U7C
inverts the low level to a high level. The Reset
input to the J/K Flip Flop is then high. With the
Set input low, the output on pin 1 1s switched low.
Also, the Reset inputis switched back to low. With
both the Set and Reset inputs low, the output on
pin 1 remains low until the input to the NAND
gate changes from a low level to a high level. This
transition is accomplished when a high-to-low
pulseis applied to the External Trigger (J6 pin 49).
The External Trigger pulse pulls the input to
Inverter MIA2U7B low; the output of the inverter
than goes high. This low-to-high transition gates
J/K Flip Flop pin 1 high, enabling the NAND gate
on the next EOC pulse from the A/D Converter. Af
this time, the NAND gate output goes low and is
inverted by M1A2U7C. The high output of
M1A2U7C resets the output of the J/K Flip Flop
until the next pulse on the External Trigger. Data
18 clocked into the Output Registers on the low-to-
high transition of the pulse. The truth table for
M1A2U4B is shown below.
J K 3 R Clockf6] Р 1
X X 1 О X 1
X X 0 i X О
1 X 0 0 | 1
X 0 0 0 ! 1
X X 1 1 x Indeter-
minate
Page 7
28. The Overrange Logic M1A3U10 decodes the
thousands data bit (103) and three of the hundreds
data bits (1028, 102C, and 1020). These data bits
are the thousand bit 1 and the hundred bits 2, 4,
and 8 from Output Register M1 A3US8. The thou-
sands bit is ANDed with each of the three
hundreds bits to provide a low output on M1 A3U10
pin 8. This low output blanks the units, tens and
hundreds digits in the overrange condition. The
meter overranges when the value in the Output
Registers is 1200 or greater. The meter remains in
the overrange condition until the reading is less
than 1200. The low output of MIA3U10 pin 8 is
inverted by MIA2U5D to llluminate Overrange
Light DS5. The low output on MI ASU10 pin 8 is
gated with the DS1 output from the A/D Conver-
ter at NOR gate M1 A2U5C. The DSI output of the
A/D Converter clocks the thousand digit into dis-
play DS1 and Demultiplexer Latch M1A3U1.
When both the overrange bit and the DSI input to
the Blanking Logic NOR gate M1A2U5C are low,
the output of the NOR gate is high. The high out-
put is inverted by M1 A2U5B for a low G3 input to
the 7-Segment Decoder Mi A2U2, thus disabling
the decoder. The decoder will remain disabled
while DS1 is low and blank the display because
the units, tens, and hundreds digits will not be
decoded. When DS1 goes high for the thousands
digit, the 7-Segment Decoder is enabled and the
digit is decoded and displayed. |
29. The minus sign, located on DS] of the Display
Assembly, lights only when both:
a. MIA2U! pin 19 (DS1)1s high.
b. MI AZUL pin 22 (Q2) is low.
The DS1 line from the A/D Converter must be
high to enable display DS1, The logic level on the
Q2 line from the A/D Converter determines the
polarity of the digits in the display. A low Q2 input
to M1A1DSI pin 4 illuminates the minus sign. A
high Q2inputto M1A1DS1 pin 4 indicates positive
polarity, but the plus sign does not illuminate.
30. Recorder Output Buffer M1AZ2U6 prevents a
load on Recorder rear panel connector J4 from
interferring with the operation of the Meter
Assembly. |
31. The powersupply for M1, located onthe M1A3
circuit board, consists of a full-wave bridge recti-
fier (CRI—4) The +5V supply is filtered by capaci-
tors 2 through 7 and regulated by series regulator
Ul. The~5V supply is filtered by C1 and regulated
by CR5. The power supply is used throughout the
meter assembly.
Page 8 Model 4328
PERFORMANCE TESTS
32. PERFORMANCE TESTS
33. The performance tests are suitable for incoming inspection, periodic evaluation, and troubleshooting.
Use the recommended test equipment listed in Table 5-1 of the 432A manual with the following exceptions:
a. Change the Filter Network (see Figure 1 in this supplement).
b. Add a Digital Printer with TTL logic levels, +8421 BCD code 4 lines minimum — HP 5150A Thermal
Printer with HP 562 A-16C interface cable.
34. To test the rear panel BCD output at J6, connect the digital printer to J6 and check that it prints the
same digits that appear on the digital panel meter. Before performing the following tests, remove the 432B
top cover.
| WARNING |
Voltages potentially dangerous to life are present at the power supply transformer pins.
35. Meter Accuracy Test
SPECIFICATION:
Accuracy:
Instrument Uncertainty: 0.5% on 100 uW and 1 and 10 mW ranges, 1,0% on 10 uW range (20° - 30°C)
+1.5% max. on all ranges (0 — 55°C) +1.0% typical
Zero Uncertainty: + one count on all ranges.
DESCRIPTION: Meter accuracy is checked with an 8477A Calibrator. At the same time, RECORDER
output is checked with a digital voltmeter.
EQUIPMENT:
Calibrator . . . . . . . . . . . . HP B8477A
Digital Voltmeter . . . . . .. . . . HP 3435A
Cable Assembly (2) a «+ +. . . . HP10503A
Cable Assembly 244 +. + + +. . HP11000A
PROCEDURE:
a. Connect the digital voltmeter and the calibrator to the 432B (see Figure 5-1 in the 432A manual).
Set the 8477 A Calibrator controls as follows:
POWER (MW) . . . . . . . . . . . 0061 mW
FUNCTION . . . . . . . . . . . . . . 200%
ZERO/TEST aa aa a. ZERO
b. Set the 432B controls as follows:
MOUNT RESISTANCE a a. 2000
RANGE aa. LOLW
POWER ae a ON
CALIBRATION FACTOR a a. 100%
A281... . . . . . . + + . . CALIBRATE