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*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 You can help improve this publication by calling attention to errors and by 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.

Paragraph SECTION I. GENERAL Purpose and scope ................................................ Descriptive data ................................................... General instructions............................................. Differences among models.................................... CALIBRATION Equipment and accessories required ................... Preliminary procedure ......................................... Oscillator frequency and stability ........................ Self-check ............................................................. Input sensitivity................................................... Time base external input ..................................... Power supply ........................................................ Final procedure .................................................... SPECIFIC ITEM IDENTIFICATION Identification........................................................ Secondary transfer calibration standards set ...... 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Page 2 2 3 4 3 4 5 6 6 8 8 9 9 9

II.

III.

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

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

b. Specifications
Power input requirements Frequency measurement: Sensitivity Range Accuracy Gate time Period measurement: Sensitivity1 Range Accuracy2 Time base: Output frequency Amplitude1 Stability External input Ratio and multiple ratio: Range1 Reads Accuracy2 115 or 230 v ą10%, 50 to 60 Hz, 40 w. 0.1 v rms sine wave 2 Hz to 1.2 MHz ą1 count, ą time base accuracy 0.01,0.1, and 10 sec 0.1 v rms sine wave 2 Hz to 10 kHz in 1 period, 2 Hz to 1.2 MHz in 100-period average and above. ą1 count, ą time base accuracy, ą trigger error/period averaged. 1 MHz Greater than 3 v pp into 1000 ohms. 2 parts in 107 /month 1 v rms into 500 ohms, 100 Hz to 1.2 MHz. f1: 100 Hz to 1.2 MHz at 1 v rms into 500 ohms f2: 2 Hz to 1.2 MHz (f1/ f2) x period multiplier ą1 count of f1, ą trigger error of f2/period multiplier.

c. Calibration
Time required Technique
1This 2Trigger

2 hr (approx.) Dc and low frequency

specification is for information only and is not necessarily verified in this procedure. 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 sixplace 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.
Item number A1 A2 A3 A4 A5 Table 1. Minimum Specifications of Equipment Required Common name Minimum use specifications TEST OSCILLATOR RANGE: 10 Hz to 1.2 MHz DC VOLTMETER RANGE: 0 to 160 vdc ACCURACY: ą0.8% RECEIVER RANGE: 1 MHz ACCURACY: 1 part in 10 -7 AUTOTRANSFORMER RANGE: 105 to 125 vac ACCURACY: ą1% AC VOLTMETER RANGE: 0 to 1 v rms ACCURACY: ą2%

Item number B1 B2 B3 B4

Table 2. Accessories Required Common name Description ADAPTER 600-ohm double banana jack to 50-ohm BNC jack ADAPTER BNC jack to UHF plug ADAPTER BNC T type; 2 jacks, 1 plug 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 autotransformer for 115 volts ac. to 115-volt ac source and adjust controls of

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 (ą1 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. 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). Repeat a(1) above and adjust A19R7 (fig. 1) until dc voltmeter

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.
Item number A1 A2 A3 A4 A5 Table 5. Equipment Identification Identifying Nomenclature number Manufacturer and model number GENERATOR, SIGNAL 7659913 Hewlett-Packard, Model 650AR RATIOMETER, DIGITAL 7910588-3 Cimron, Models 7500A-162 and 6710A-163 STANDARD FREQUENCY 8616320 Lavoie, Model 800D COMPARATOR TRANSFORMER, VARIABLE 7910809 General Radio, Model W10MT3A POWER VOLTMETER 7910329-2 John Fluke, Model 9l0A

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.
Item Number B1 B2 B3 B4
1Two

Table 6. Accessory Identification Identifying Nomenclature Number Description ADAPTER 7912056-1 600-ohm double banana jack to 50-ohm BNC jack. ADAPTER 105194.39 BNC jack to UHF plug ADAPTER, CONNECTOR1 MS 35173BNC T type; 2 jacks, 1 plug 274B & C CABLE ASSEMBLY,2 7907467 30-in., RG-58()/U; BNC plug terminations RADIO FREQUENCY

2Three

required. required.

TB 9-6625-080-50 By Order of the Secretary of the Army: W. C. WESTMORELAND General, United States Army Chief of Staff 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.

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

PIN: 010314-000