Agilent Technologies 6012b user manual

User manual for the device Agilent Technologies 6012b

Device: Agilent Technologies 6012b
Category: Power Supply
Manufacturer: Agilent Technologies
Size: 2.1 MB
Added : 12/30/2013
Number of pages: 126
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Abstracts of contents
Summary of the content on the page No. 1

SERVICE MANUAL
AUTORANGING
DC POWER SUPPLY
AGILENT MODELS 6010A, 6011A,
6012B and 6015A
Agilent Part No. 5964-8275
FOR INSTRUMENTS WITH SERIAL NUMBERS
Agilent Model 6010A; Serials US37110171 and above
Agilent Model 6011A; Serials US35460156 and above
Agilent Model 6012B; Serials US35430336 and above
Agilent Model 6015A; Serials US37050146 and above
For instruments with higher serial numbers, a change page may be included.
Microfiche Part No. 5964-8276 Printed in

Summary of the content on the page No. 2

CERTIFICATION Agilent Technologies certifies that this product met its published specifications at time of shipment from the factory. Agilent Technologies further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology, to the extent allowed by the Institute’s calibration facility, and to the calibration facilities of other International Standards Organization members. WARRANTY This Agilent Technologies hardware product is war

Summary of the content on the page No. 3

SAFETY SUMMARY The following general safety precautions must be observed during all phases of operation, service and repair of this instrument. Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design, manufacture, and intended use of the instrument. Agilent Technologies, Inc. assumes no liability for the customer's failure to comply with these requirements. BEFORE APPLYING POWER. Verify that the product is set to match the a

Summary of the content on the page No. 4

Safety Symbol Definitions Symbol Description Symbol Description Direct current Terminal for Line conductor on permanently installed equipment Alternating current Caution, risk of electric shock Both direct and alternating current Caution, hot surface Three-phase alternating current Caution (refer to accompanying documents) Earth (ground) terminal In position of a bi-stable push control Protective earth (ground) terminal Out position of a bi-stable push control (Intended for connection to externa

Summary of the content on the page No. 5

TABLE OF CONTENTS Introduction ............................................................................................................................................................................ 7 Scope .................................................................................................................................................................................... 7 Calibration and Verification ............................................................................

Summary of the content on the page No. 6

DC Power Conversion Subsystem...................................................................................................................................... 54 Output Subsystem............................................................................................................................................................... 54 The Front Panel Board.....................................................................................................................................

Summary of the content on the page No. 7

1 Introduction Scope This manual contains information for troubleshooting the Agilent Models 6010A, 6011A, 6012B, or 6015A 1000W Autoranging Power Supply to the component level. Wherever applicable, the service instructions given in this manual refer to pertinent information provided in the Operation Manual. Both manuals cover Agilent Models 6010A/11A/12B/15A; differences between models are described as required. The following information is contained in this manual. Calibration and Verificatio

Summary of the content on the page No. 8

Manual Revisions Agilent Technologies instruments are identified by a 10-digit serial number. The format is described as follows: first two letters indicate the country of manufacture. The next four digits are a code that identify either the date of manufacture or of a significant design change. The last four digits are a sequential number assigned to each instrument. Item Description US The first two letters indicates the country of manufacture, where US = USA; MY = Malaysia. 3648 This is a cod

Summary of the content on the page No. 9

2 Calibration and Verification Introduction This section provides test and calibration procedures. The operation-verification tests comprise a short procedure to verify that the unit is performing properly, without testing all specified parameters. After troubleshooting and repair of a defective power supply you can usually verify proper operation with the turn-on checkout procedure in the Operating Manual. Repairs to the A1 main board and the A2 control board can involve circuits which, althoug

Summary of the content on the page No. 10

Table 2-1. Test Equipment Required TYPE REQUIRED CHARACTERISTICS USE RECOMMENDED MODEL Oscilloscope Sensitivity: 1mV P,T Agilent 1740A Bandwidth: 20MHz & 100MHz Input: differential, 50Ω & 10MΩ Isolation Transformer 100VA 4KVA minimum T RMS Voltmeter True rms, 10MHz bandwidth P Agilent 3400A Sensitivity: 1 mV Accuracy: 5% Logic Pulser 4.5 to 5.5Vdc @ 35mA T Agilent 546A Multimeter Resolution: 100nV P,A,T Agilent 3456A Accuracy: 0.0035%, 6½ digit CC PARD Test No saturation at: P Tektronix P6303 C

Summary of the content on the page No. 11

Table 2-1. Test Equipment Required (continued) TYPE REQUIRED CHARACTERISTICS USE RECOMMENDED MODEL Load Resistors P,A 40Ω , ±1%, 1000W (6015A) 250Ω , ±1%, 1000W Current-Monitoring Value: P,A Resistors 6010A 100mV @ 10A (10mΩ must be capable of 20Amps) Accuracy: 0.02% ** TC: 10ppm/°C 6011A 50mV @100A (0.5mΩ ) Accuracy: 0.05% ** TC: 30ppm/°C 6012B 50mV @ 50A (1.0mΩ ) Accuracy: 0.02% ** TC: 30ppm/°C 6015A 0.1Ω , 15A, ±0.04%** Calibration and Test A,T Value: 50Ω , 5%, 40W Resistors 2KΩ , 0.01%,

Summary of the content on the page No. 12

Initial Setup Maintenance described herein is performed with power supplied to the instrument, and protective covers removed. Such maintenance should be performed only by service trained personnel who are aware of the hazards involved (for example, fire and electrical shock). Turn off ac power when making or removing connections to the power supply. Where maintenance can be performed without power applied, the power should be removed. a. Unplug the line cable and remove the top cover by removi

Summary of the content on the page No. 13

Table 2-2. Calibration Procedure (continued) TEST TESTED TEST POINTS TEST SEQUENCE AND ADJUSTMENTS EXPECTED VARIABLE RESULTS V-MON V-MON VM ( + ) a. Set voltage and current controls to minimum 0 ± 80µ V Zero M ( - ) settings. Adjust. b. Disable power supply as in Initial Setup step i. c. Short circuit output terminals and connect the DVM between test points. Turn on power supply. d. Adjust V-MON Zero trim pot A2R22 to voltage range specified in the results. Common Residual VM ( + ) a. Set volt

Summary of the content on the page No. 14

Table 2-2. Calibration Procedure (continued) TEST TESTED TEST POINTS TEST SEQUENCE AND ADJUSTMENTS EXPECTED VARIABLE RESULTS Power V(OUT) a. Perform I-MON F/S Adjust before Limit I(OUT) proceeding. Adjust. b. Connect the unit to the ac power line via a variable transformer. Set input power rail to 240Vdc; DVM ( + ) on rear of A1R3 and DVM (-) to rear of A1R1. Note that power rail must be maintained at 240Vdc during calibration. WARNING The inner cover must be removed to connect the voltmeter. D

Summary of the content on the page No. 15

Table 2-2. Calibration Procedure (continued) TEST TESTED TEST POINTS TEST SEQUENCE AND ADJUSTMENTS EXPECTED VARIABLE RESULTS Power Limit h. Turn A2R26 (upper knee) fully counter Adjust clockwise. Turn on the supply and set voltage (continued) at 200V (6010A), 20V (6011A), 60V (6012B), 500V (6015A), and current at 5.25A (6010A), 56A (6011A), 19A (6012B) 2.25A (6015A), using DISPLAY SETTINGS. i. Turn A2R26 (upper knee) clockwise until CV LED lights. Output should be 200 ± 2V (6010A), 20 ±0.5V (60

Summary of the content on the page No. 16

Table 2-3. Guide to Recalibration After Repair Printed Circuit Block Name Circuit Within Ref. Perform These Board Designator Procedures* A1 Main Board R11 3 then 4 R13 (6011A) A1 Main Board T1, T2 5 A5 Diode Board CR4 5 CR5, CR1 (6011A) A2 Control Board Constant Voltage All Except Current All 1 then 2 (CV) Circuit Source A2 Control Board Constant Voltage Current Source All 6 (CV) Circuit A2 Control Board Constant Current All 3 then 4 (CC) Circuit A2 Control Board Power Limit All 5 Comparator A2

Summary of the content on the page No. 17

for the electronic load in the following tests: CV Source Effect (Line Regulation) CC Load Effect (Load Regulation) Temperature Coefficient (6015A) Drift (stability ) (6015A) You may substitute: 40Ω 1000W load resistor (6010A) 0.058Ω 1000W load resistor (6011A) 3.4Ω 1000W load resistor (6012B) 40Ω 1000W load resistor (6015A) in these tests: CV Load Effect (Load Regulation) CV PARD (Ripple and Noise) CC Source Effect (Line Regulation) CC PARD (Ripple and Noise) The substitution of the load resist

Summary of the content on the page No. 18

Constant Voltage (CV) Tests CV Setup. If more than one meter or a meter and an oscilloscope are used, connect each to the + S and - S terminals by a separate pair of leads to avoid mutual coupling effects. Connect only to + S and -S (except for peak-to-peak PARD) because the unit regulates the output voltage between + S and - S, not between + OUT and -OUT. Use coaxial cable or shielded 2-wire cable to avoid pickup on test leads. For all CV tests set the output current at full output to assure CV

Summary of the content on the page No. 19

g. When the reading settles, record the output voltage again. Check that the two recorded readings differ no more than: ± 0.011Vdc (6010A) ± 0.0037Vdc (6011A) ± 0.007Vdc (6012B) ± 0.033Vdc (6015A) Source Effect (Line Regulation). Source effect is the change in dc output voltage resulting from a change in ac input voltage from the minimum to the maximum value as specified in Input Power Requirements in the Specifications Table, in the Operating Manual. Proceed as follows: a. Connect the test equ

Summary of the content on the page No. 20

d. Reduce the resistance of the load to draw an output current of: 17.0Adc (6010A) 120Adc (6011A) 17.5Adc (6012B) 5.0Adc (6015A) Check that the unit's CV LED remains lighted. e. Check that the rms noise voltage at the true rms voltmeter is no more than: 22mV rms (6010A) 8.0mV rms (6011A) 8.0mV rms (6012B) 50mV rms (6015A) Figure 2-4. RMS Measurement Test Setup, CV PARD Test Peak Measurement Procedure. Figure 2-5 shows the interconnections of equipment to measure PARD in Vpp. The equipme


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