Hewlett Packard 413A Level Meter
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Model:
413A
Datum:
1962
Categorie:
Groep:
Omschrijving:
DC Null Voltmeter
Informatie
The Model 413A DC Null Voltmeter is a zero-center
dc voltmeter with end scale ranges from 1 mv to 1000 volts
in a 1-3-10 sequence. Input impedance varies from 10 megohms
to 200 megohms depending on the setting of the RANGE (VOLTS)
switch. The input terminals are isolated from the cabinet
and ground permitting operation from references up to 500
volts dc or 130 volts ac from ground potential.
INDICATORS. In addition to the conventional meter,
which has both a normal (± 10% of full scale) and expanded
(± full scale) range of zero adjustment, the Model 413A has
Amplifier output connectors which provide an output voltage
proportional to meter deflection. This feature makes it
possible to use the Model 413A as a dc Amplifier for use
with thermocouples, etc., or to use it in conjunction with a
recorder to obtain permanent records without the need for
constant monitoring.
USES. The Model 413A may be used for any application
that calls for a dc null voltmeter. High input impedance of
the instrument makes it especially valuable for resistance
bridge measurements. The high voltage gain and the
exceedingly low drift and noise make the Model 413A an ideal
instrument for many control applications, particularly where
the system must be left unattended for long periods of time.
Handleidingen type:
Service-en gebruikershandleiding
Pagina’s:
41
Grootte:
5.90 Mbytes (6186348 Bytes)
Taal:
english
Herziening:
Handleidingen-ID:
00413-90003 and/or 01138-5
Datum:
1966 11 01
Kwaliteit:
Gescand document alle leesbaar.
Upload datum:
2020 05 31
MD5:
17bb1f889d72107ffdc26cbfbee9792b
Downloads:
467
Informatie
Serial Prefix 315-
* Appendix C, Manual Backdating Changes, adapts this manual to serial prefix 139-, Serials Below 315-02311.
Section Page
I GENERAL INFORMATION ... 1-1
1-1. Introduction ... 1-1
1-4. Description ... 1-1
Section Page
E INSTALLATION ... 2-1
2-1. Introduction ... 2-1
2-3. Initial Inspection ... 2-1
2-5. Power Requirements ... 2-1
2-7. Grounding Requirements ... , 2-1
2-10. Repackaging for Shipment ... 2-1
Section Page
HI OPERATING INSTRUCTIONS ... , 3-1
3-1. Introduction ... , 3-1
3-5. Controls ... , 3-1
3-7. Operating Instructions ... , 3-1
Section Page
IV THEORY OF OPERATION ... 4-1. General ... 4-1 , 4-1
4-3. DC Input Circuits ... , 4-1
4-5. AC Circuits ... , 4-1
4-9. DC Output Circuits ... , 4-2
4-11. Power supply ... , 4-2
Section Page
V MAINTENANCE ... . 5-1
5-1. Introduction ... 5-3. Test Instruments Required ... 5-1 , 5-1
5-5. Cabinet Removal ... . 5-1
5-7. Troubleshooting ... 5-8. General ... , 5-1 . 5-1
5-10. Amplifier-Power Supply ... . 5-2
Section V (Cont’d) Page
5-12. Chopper Assembly ... 5-2
5-14. Modulator ... 5-2
5-16. Demodulator ... 5-3
5-18. Repair and Replacement ... 5-19. General ... 5-4 5-4
5-21. Modulator Replacement ... 5-4
5-23. Demodulator Replacement . . . . 5-4
5-25. Range (Volts) Switch Replacement 5-4
5-27. Tube Replacement ... b-4
5-29. Adjustments and Calibration . . . . 5-6
5-31. Mechanical Zero Adjustment . . . b-6
5-33. Hum Balance ... 5-34. Bias Adjust ... 5-6 5-6
5-35. Amplifier Gain Calibration . . . . 5-6
5-37. Meter Calibration ... 5-6
5-38. Performance and Verification . . . . 5-7
5-40. Voltmeter ... 5-7
5-41. AC Rejection ... 5-42. Amplifier Output ... 5-7 5-7
Section Page
VI REPLACEABLE PARTS ... 6-1
6-1. Introduction ... 6-1
6-4. Ordering Information ... 6-1
6-6. Non-Listed Parts ... 6-1
Appendix
A CODE LIST OF MANUFACTURERS
Appendix
B SALES AND SERVICE OFFICES
Appendix
C MANUAL BACKDATING CHANGES
Handleidingen type:
Service-en gebruikershandleiding
Pagina’s:
44
Grootte:
8.70 Mbytes (9127011 Bytes)
Taal:
english
Herziening:
Handleidingen-ID:
01138-2
Datum:
1962 02 01
Kwaliteit:
Gescand document alle leesbaar.
Upload datum:
2017 12 31
MD5:
414a364b3fc156a7c291b186ace68183
Downloads:
391
Informatie
Serial prefixed: 139
I GENERAL INFORMATION ... 1-1
1-1. Introduction ... 1-1
1-4. Description ... 1-1
1-8. Three Conductor Power Cable. . . 1-1
1-10. Calibration Accuracy ... 1-1
II PREPARATION FOR USE ... 2-1
2-1. Incoming Inspection ... 2-1
2-4. Reshipment ... 2-1
2-6. Installation ... 2-1
2-8. 230-Volt Operation ... 2-1
2-10. Environmental Limits ... 2-1
III OPERATING INSTRUCTIONS ... 3-1
3-1. Introduction ... 3-1
3-5. Controls ... 3-1
3-7. Operating Instructions ... 3-1
IV PRINCIPLES OF OPERATION ... 4-1
4-1. General ... 4-1
4-3. DC Input Circuits ... 4-1
4-5. AC Circuits ... 4-1
4-9. DC Output Circuits ... 4-2
4-11. Power Supply ... 4-2
V MAINTENANCE ... 5-1
5-1. Introduction ... 5-1 VI
5-3. Test Instruments Required ... 5-1
5-5. Cabinet Removal ... 5-1
Section Page
V Cont'd 5-1
5-7. Troubleshooting ... 5-1
5-8. General ... 5-1
5-10. Amplifier-Power Supply ... 5-2
5-12. Chopper Assembly ... 5-2
5-14. Modulator ... 5-2
5-16. Demodulator ... 5-3
5-18. Repair and Replacement ... 5-4
5-19. General ... 5-4
5-21. Modulator Replacement ... 5-4
5-23. Demodulator Replacement . . . 5-4
5-25. Range (Volts) Switch
Replacement ... 5-4
5-27. Tube Replacement ... 5-4
5-29. Adjustments ... 5-6
5-31. Mechanical Zero Adjustment . . 5-6
5-33. Hum Balance ... 5-6
5-34. Bias Adjust ... 5-6
5-35. Amplifier Gain Calibration
and Meter Calibration ... 5-6
5-36. Preliminary ... 5-6
5-38. Gain Calibration ... 5-7
5-40. Performance Verification ... 5-7
5-42. Voltmeter ... 5-7
5-43. AC Rejection ... 5-8
5-44. Amplifier Output ... 5-8
REPLACEABLE PARTS ... 6-1
6-1. Introduction ... 6-1
6-5. Ordering Information ... 6-1