Apparecchiature informatiche

Hewlett Packard 419A Metro di livello
Produttore:
Hewlett Packard
Modello: 419A
Data: 1966
Categoria: Strumenti di misura
Gruppo: Metro di livello
Descrizione: DC Null Voltmeter
Informazioni:
                                    The Model 419A is housed in a standard -hp-1/2 module case.
A rechargeable battery power supply allows operation
independent of ac line. Range and function switching is
accomplished by front panel controls.

The Model 419A provides 18 end scale dc voltage ranges in a
1, 3, 10 sequence from 3 microvolts to 1000 volts. The Model
419A also provides 7 end scale dc current ranges from 30
picoamps to 30 nanoamps. An internal bucking supply allows
voltages up to 300 millivolts to be measured with infinite
input impedance. The input impedance for the higher ranges
is 100 MΩ

1-8. Recorder output terminals are provided on the rear
panel. The voltage available is proportional to the meter
deflection and is adjustable from 0 to 1 volt at full scale.

Questi manuali sono disponibili per l'attrezzatura di cui sopra:

Tipo manuale: Servizio e manuale utente HewlettPackard-10090-Manual-Page-1-Picture
Pagine: 51
Dimensioni: 4.36 Mbytes (4570856 Bytes)
Lingua: Inglese
Revisione:
Manuale-ID/numero: 01779-2
Data: 01 dicembre 1966
Qualità: Documento scansionato, tutto leggibile.
Data di aggiunta:
MD5: cefb79893c342c3fecf25018626fbd34
Downloads: 58 dal 31 dicembre 2017
Informazioni:
I GENERAL INFORMATION.......		1-1
1-1.	Introduction............	1-1
1-3.  1 E	Specifications...........	1-1 i ■i
1-9.	itliU X 111 • • • • •  Instrument/Manual
Identification.	1-1
1-11.	Accessory Equipment Supplied . .	1-1
1-13.	Accessory Eauinment Available .	1-1
		
Section		Page
II INSTALLATION.............		2-1
2-1.	Introduction............	2-1
2-3.	Initial Inspection.........	2-1
2-5.	Power Requirements.......	2-1
£ “ I .	urounumg requirements.....	z-i
2-10.	Installation............	2-1
2-12.	Bench Mounting.........	2-1
2-14 =	Rack Mounting.........	2-1
2-16.	Combination Mounting.....	. 2-1
2-18.	Repackaging for Shipment ....	. 2-1
		
Section		Page
III OPERATING INSTRUCTIONS......		. 3-1
3-1.	Introduction............	. 3-1
3-3.	Controls, Indicators, and Connectors 3-1	
3-5.	Operating Instructions......	. 3-1
3-7.	Turn-On Procedure (Battery	
	One r*n finn ^	<?_1
3-8.	Turn-On Procedure (AC Line	
	Operation)...........	. 3-1
3-9.	DC Voltage Measurements . . .	. 3-1
3-10.	DC Current Measurements . . .	. 3-2
3-17.	Applications............	. 3-2
		
Section		Page
IV THEORY OF OPERATION........		. 4-1
4-1.	Introduction............	. 4-1
4-3.	General Description.......	. 4-1
4-11.	Detailed Description.......	. 4-1
4-12.	Bucking Supply (See Figure 6-3)	. 4-1
4-15.	Input Attenuator........	. 4-2
4-17.	Input Filter...........	. 4-2
4-19.	Modulator/Demodulator ....	. 4-2
4-23.	AC Amplifier..........	. 4-2
4-26.  4-30.	DC Amplifier..........  Meter
Circuit..........	. 4-2 . 4-2
4-33.	Feedback Control........	. 4-2
4-35.	Power Supply and Neon Driver	
	(Figure 6-4)..........	. 4-3
V MAINTENANCE..............		5-1
5-1.	Introduction............	5-1
5-3.  c r	Test Equipment..........	5-1
U“U*  5-7.	Voltmeter Accuracy Test.....	O-L  5-1
5-9.	Bucking Voltage Test......	5-1
5-11.	Ammptpr Amiirnnv Tpst ....	K-9!
5-13.	Response Time Test.......	5-2
5-15.	Superimposed AC Rejection Test	5-2
5-17.	Noise Test............	5-2
5-19.	Input Resistance Test......	5-3
5-21.	Repair Procedures.........	5-3
5-22.	Cover Removal.........	5-3
O-Üft.	servicing Fnntea uircuit .Boards	5-3
5-29.	Adjustment and Calibration ....	5-4
5-31.	Mechanical Zero Adjustment . .	5-4
R-S3	Phnnnpr AHiiiRtmpnt- .......	
5-35.	Electrical Zero Adjustment. . .	5-5
5-37.	Full Scale Calibration......	5-5
5-39.	Battery Test Calibration ....	5-5
5-41.	Troubleshooting..........	5-5
5-43.	No Response to Input......	5-5
5-45.	Positive or Negatn& Foldover .	5-6
5-47.	Excessive Noise.........	5-6
5-49.	Troubleshooting the Input At-	
	tenuator ............	5-6
	Don! Q pam onf nf XT’n #->+-<"» y*tt Qnl  xviiv \_i± x'
aukui y	
	Components..........	5-6
		
Section		Page
VI CIRCUIT DIAGRAMS...........		6-1
6-1.	Introduction............	6-1
6-3.	Schematic Diagrams........	6-1
6-5.	Component Location Diagrams . .	6-1
		
Section		Page
VII REPLACEABLE PARTS.........		7-1
7-1.	Introduction............	7-1
7-4.	Ordering Information.......	7-1
7-6.	Non-Listed Parts.........	7-1
		
Appendix		
A CODE LIST OF MANUFACTURERS		
Appendix		
B SALES AND SERVICE OFFICES		
Appendix		

HewlettPackard-10090-Manual-Page-1-Picture


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