HP 5232a schematic

*TB 9-6625-080-50

DEPARTMENT OF THE ARMY TECHNICAL BULLETIN

CALIBRATION PROCEDURE FOR

ELECTRONIC COUNTER

HEWLETT-PACKARD, MODELS

5232A (CP-798/G) AND 5532A

Headquarters, Department of the Army, Washington, DC

3 September 1969

♦♦REPORTING OF ERRORS♦♦

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recommending improvements and stating your reasons for the recommendations.
Your letter or DA Form 2028, Recommended Changes to Publications, should be
mailed directly to Commander, U. S. Army Aviation and Missile Command,
ATTN: AMSAM-TMD-EP, Redstone Arsenal, AL 35898-5000. FAX to DSN 788­2313 (commercial 256-842-2313). A reply will be mailed directly to you.

SECTION I. GENERAL

Purpose and scope................................................ 1 2

Descriptive data................................................... 2 2

General instructions............................................. 3 3

Differences among models.................................... 4 4

II. CALIBRATION

Equipment and accessories required ................... 5 3

Preliminary procedure ......................................... 6 4

Oscillator frequency and stability........................ 7 5

Self-check ............................................................. 8 6

Input sensitivity................................................... 9 6

Time base external input ..................................... 10 8

Power supply........................................................ 11 8

Final procedure.................................................... 12 9

III. SPECIFIC ITEM IDENTIFICATION

Identification........................................................ 13 9

Secondary transfer calibration standards set...... 14 9

__________

*This bulletin supersedes TB 9-6625-080-50, 20 December 1966.

Paragraph Page

SECTION I

GENERAL

1. Purpose and Scope. This bulletin provides information for the periodic calibration of

electronic counter, Hewlett-Packard Models 5232A (CP-798/G) and 5532A. It is to be used
by personnel trained and qualified in the use of calibration equipment.

2. Descriptive Data
a. Identification

Nomenclature ELECTRONIC COUNTER
Military designation CP-798/G (Model 5232A)
Manufacturer Hewlett-Packard
Model numbers 5232A and 5532A
Reference Manufacturer’s instrumentation manual.

b. Specifications

Power input requirements 115 or 230 v ±10%, 50 to 60 Hz, 40 w.
Frequency measurement:
Sensitivity 0.1 v rms sine wave
Range 2 Hz to 1.2 MHz
Accuracy ±1 count, ± time base accuracy
Gate time 0.01,0.1, and 10 sec
Period measurement:
Sensitivity
Range 2 Hz to 10 kHz in 1 period, 2 Hz to 1.2 MHz in 100-period

Accuracy
Time base:

Output frequency 1 MHz
Amplitude
Stability 2 parts in 107 /month
External input 1 v rms into 500 ohms, 100 Hz to 1.2 MHz.
Ratio and multiple ratio:
Range

Reads (f1/ f2) x period multiplier
Accuracy

1

0.1 v rms sine wave
average and above.

2

±1 count, ± time base accuracy, ± trigger error/period
averaged.

1

1

Greater than 3 v pp into 1000 ohms.

f1: 100 Hz to 1.2 MHz at 1 v rms into 500 ohms
f2: 2 Hz to 1.2 MHz

2

±1 count of f

± trigger error of f2/period multiplier.

1,

c. Calibration

Time required 2 hr (approx.)
Technique Dc and low frequency

1

This specification is for information only and is not necessarily verified in this procedure.

2

Trigger error for 0.1 v rms sine wave input is 0.3% for signal with 40-db signal-to-noise ratio. Trigger error

decreases with increased signal amplitude and slope.

3. General Instructions
a. DA Form 2416 (Calibration Data Card). During the use of this bulletin,

annotate DA Form 2416 in accordance with TM 38-750 for only those parameters which
have an annotation note in the performance checks.

b. Unit Under Test. Electronic counter, Hewlett-Packard Models 5232A (CP-798/G)

and 5532A, will be referred to as the UUT (unit under test) throughout this bulletin.

c. Equipment and Accessory Identification. The equipment and accessories

referred to throughout this bulletin are identified in tables 1 and 2 and section III.

d. Equipment Setup. Disconnect instructions are not contained in this bulletin.
e. Power Supply. When indications specified in paragraphs 8 through 11 are not

within tolerance, perform the power supply check prior to making adjustments. After
power supply adjustments are made, repeat paragraphs 8 through 11. Do not perform the
power supply check if all other parameters are within tolerance.

4. Differences Among Models. Model 5232A CP-798/G displays measurements on six-

place neon column readouts. Model 5532A displays measurements on six-place in-line
Nixie readouts.

SECTION II

CALIBRATION

5. Equipment and Accessories Required. Table 1 lists minimum use specifications of

equipment required for calibration performance checks and adjustments. Table 2 lists
required accessories. Tables 1 and 2 are provided to assist in the selection of required
equipment and accessories. For specific item identification, refer to section III.

Table 1. Minimum Specifications of Equipment Required

Item number Common name Minimum use specifications

A1 TEST OSCILLATOR RANGE: 10 Hz to 1.2 MHz
A2 DC VOLTMETER RANGE: 0 to 160 vdc

ACCURACY: ±0.8%

A3 RECEIVER RANGE: 1 MHz

ACCURACY: 1 part in 10

A4 AUTOTRANSFORMER RANGE: 105 to 125 vac

ACCURACY: ±1%

A5 AC VOLTMETER RANGE: 0 to 1 v rms

ACCURACY: ±2%

-7

Table 2. Accessories Required

Item number Common name Description

B1 ADAPTER 600-ohm double banana jack to 50-ohm BNC jack
B2 ADAPTER BNC jack to UHF plug
B3 ADAPTER BNC T type; 2 jacks, 1 plug
B4 CABLE 30-in., RG-58()/U; BNC plug terminations

6. Preliminary Procedure

NOTE

Personnel should familiarize themselves with the entire
bulletin prior to performing calibration.

a. Remove top and bottom cover from UUT. Use extender board (supplied with UUT)

as necessary in making adjustments.

b. Connect UUT to autotransformer (A4, table 1).
c. Connect autotransformer to 115-volt ac source and adjust controls of

autotransformer for 115 volts ac.

d. Position UUT controls as listed in (1) through (5) below:

(1) STD switch (rear panel) to INT.
(2) STORAGE switch (rear panel) to STORAGE.
(3) Power switch to ON.
(4) DISPLAY control fully counterclockwise.
(5) SENSITIVITY switch to .1.

e. Allow 1 hour for equipment to warm up and stabilize.

NOTE

When the UUT is not within tolerance, perform the specified
adjustment and continue the performance check. When the
UUT is not within tolerance and no adjustment is specified, the
deficiency must be corrected before continuing with the
procedure.

WARNING

HIGH VOLTAGE is used during the performance of this
procedure. DEATH ON CONTACT may result if personnel fail
to observe safety precautions.

7. Oscillator Frequency and Stability
a. Performance Check

(1) Connect UUT STD connector (rear panel) to receiver (A3, table 1), using cable

(B4, table 2).

(2) Observe indication on receiver crt for partial circle rotation of one revolution per
second or less. If not, adjust OSC FREQ C3 (C10 on some models) (fig. 1) for least rotation
of partial circle.

Figure 1. Electronic counter - top view

(3) Vary autotransformer between 105 and 125 volts. Indication as observed on
receiver crt will remain as specified in (2) above.

(4) Adjust autotransformer for 115 volts.

NOTE

If an out-of-tolerance condition was observed during the
preceding performance check, annotate DA Form 2416 in
accordance with TM 38-750.

b. Adjustments. No further adjustments can be made.

8. Self-Check

a. Performance Check

(1) Turn UUT sensitivity switch to CHECK and function switch to PERIOD 10.

UUT will indicate 00.0010.

(2) Repeat (1) above, using function switch settings listed in table 3. UUT will
indicate as specified.

Table 3. Self-Check

Unit under test function switch position Unit under test indication (±1 count)
PERIOD 100 0.00100
PERIOD 1K 001.000
PERIOD 10K 01.0000
PERIOD 100K 1.00000
FREQUENCY .01 00100.0
FREQUENCY .1 0100.00
FREQUENCY 1 100.000
FREQUENCY 10 00.0000

(3) Turn UUT function switch to MANUAL START. UUT will indicate continuous

10-Hz counting.

(4) Turn function switch to MANUAL STOP. UUT will indicate continuous display

of last count.

NOTE

If an out-of-tolerance condition was observed during the
preceding performance check, annotate DA Form 2416 in
accordance with TM 38-750.

b. Adjustments. No adjustments can be made.

9. Input Sensitivity
a. Performance Check

(1) Connect equipment as shown in figure 2.
(2) Turn UUT SENSITIVITY switch to .1 and function switch to FREQUENCY 1.
(3) Adjust test oscillator (A1, table 1) for 1 MHz output.
(4) Adjust test oscillator output level to 0.1 volt as indicated by ac voltmeter (A5,

table 1) UUT will display stable count. If not, perform b(2) below.

Figure 2. Input sensitivity - equipment setup.

(5) Slowly decrease test oscillator amplitude control until UUT stops counting or

count display becomes unstable.

(6) Slowly increase test oscillator output level until UUT again displays a stable

count. Ac voltmeter will indicate 0.1 volt or less.

(7) Repeat (3) through (6) above, using test oscillator frequencies 1.2 MHz, 500 kHz,

100 kHz, 10 kHz, 100 Hz and 10 Hz.

NOTE

If an out-of-tolerance condition was observed during the
preceding performance check, annotate DA Form 2416 in
accordance with TM 38-750.

b. Adjustments

(1) Repeat a(2) through (4) above.
(2) Adjust A2R2 (fig. 1) fully clockwise and then slowly counterclockwise until UUT

displays three or more stable counts.

10. Time Base External Input
a. Performance Check

(1) Connect UUT STD connector (rear panel) to adapter (B3, table 2) (No. 2, fig. 2)

using cable (B4).

(2) Turn UUT function switch to PERIOD 10K and set STD switch to EXT.
(3) Adjust test oscillator (A1, table 1) output to 1 volt as indicated by ac voltmeter

(A5).

(4) Vary test oscillator output frequency between 100 Hz and 1.2 MHz while

maintaining 1-volt indication on ac voltmeter. UUT will indicate 10000 through range of
100 Hz to 1.3 MHz.

NOTE

If an out-of-tolerance condition was observed during the
preceding performance check, annotate DA Form 2416 in
accordance with TM 38-750.

b. Adjustments. No adjustments can be made.

11. Power Supply
a. Performance Check

NOTE

Do not perform power supply check if all other parameters are
within tolerance.

(1) Connect dc voltmeter (A2, table 1) leads between pin 15 of A19 (fig. 1) and
chassis ground. Dc voltmeter will indicate between -34 and -36 volts. If not, perform b
below.

(2) Repeat (1) above, using connections listed in table 4. Dc voltmeter will indicate
within limits specified. If not, perform b below.

Table 4. Power Supply Check

Unit under test A19 Dc voltmeter indication (Volts dc)

module pin number Min Max

14 +140 +160
13 -2 -3
12 -25.5 -27.5

3 -140 -160

NOTE

If an out-of-tolerance condition was observed during the
preceding performance check, annotate DA Form 2416 in
accordance with TM 38-750.

b. Adjustments. Repeat a(1) above and adjust A19R7 (fig. 1) until dc voltmeter

indicates -35 volts.

12. Final Procedure

a. Deenergize and disconnect all equipment and reinstall protective cover of UUT.

NOTE

If no out-of-tolerance condition was observed during the
preceding performance checks, annotate DA Form 2416 in
accordance with TM 38-750.

b. In accordance with TM 38-750, annotate and affix DA Label 80 (U.S. Army
Calibration System). When the UUT cannot be adjusted within tolerance, annotate and
affix DA Form 2417 (Unserviceable Test Instrument or Standard) (red tag).

SECTION III

SPECIFIC ITEM IDENTIFICATION

13. Identification. This section identifies specific equipment and accessories as issued

with specific calibration standards sets or specific maintenance equipment groups.

14. Secondary Transfer Calibration Standards Set

a. Equipment Identification. Table 5 lists the equipment issued with secondary

transfer calibration standards set 4931-621-7877 which meets the minimum use
specifications shown in table 1. When any equipment listed in table 5 is not available,
equivalent items may be substituted provided they meet the minimum use specifications
listed in table 1.

Table 5. Equipment Identification

Item

number Nomenclature

A1 GENERATOR, SIGNAL 7659913 Hewlett-Packard, Model 650AR
A2 RATIOMETER, DIGITAL 7910588-3 Cimron, Models 7500A-162 and 6710A-163
A3 STANDARD FREQUENCY

COMPARATOR

A4 TRANSFORMER, VARIABLE

POWER

A5 VOLTMETER 7910329-2 John Fluke, Model 9l0A

Identifying

number Manufacturer and model number

8616320 Lavoie, Model 800D

7910809 General Radio, Model W10MT3A

b. Accessory Identification. Table 6 lists the accessories issued with secondary
transfer calibration standards-set 4931-621-7877 which meet the descriptions in table 2.
These accessories may be substituted unless specifically prohibited.

Table 6. Accessory Identification

Item

Number Nomenclature

B1 ADAPTER 7912056-1 600-ohm double banana jack to 50-ohm BNC jack.
B2 ADAPTER 105194.39 BNC jack to UHF plug
B3 ADAPTER, CONNECTOR

B4 CABLE ASSEMBLY,

1

Two required.

2

Three required.

RADIO FREQUENCY

2

Identifying

Number Description

1

MS 35173-

BNC T type; 2 jacks, 1 plug
274B & C
7907467 30-in., RG-58()/U; BNC plug terminations

By Order of the Secretary of the Army:

Official:

KENNETH G. WICKHAM

Major General, United States Army

The Adjutant General

Distribution:

ARADCOM (2) LBAD (20)
ARADCOM Rgn (2) SAAD (19)
OS Maj Comd (2) SVAD (7)
USAMUCOM (6) SEAD (17)
USAMICOM (54) SHAD (5)
USATECOM (1) SIAD (3)
USAWECOM (1) TOAD (20)
TIG (2) USAAPSA (3)
Armies (3) UMAD (3)
Corps (2) Picatinny Arsenal (6)
USAOC&S (11) Joliet Army Ammo Plant (1)
USA Msl & Muns Cen & Sch (1) Watervliet Arsenal (3)
USAASCOM (15) Detroit Arsenal (1)
USAARMC (11) Frankford Arsenal (6)
ANAD (21) Harry Diamond Lab (3)
RRAD (2) WSMR (7)
LEAD (d25) Units org under fol TOE:
PUAD (21) 29-227 (26)
TEAD (43)
ARNG: none
USAR: None
For explanation of abbreviations used, see AR 320-50.

TB 9-6625-080-50

W. C. WESTMORELAND

General, United States Army

Chief of Staff

US GOVERNMENT PRINTING OFFICE: 1969 - 390-935/820

PIN: 010314-000