Agilent 6012A Operations Guide

OPERATING AND SERVICE

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MANUAL

3 DEC 19~1

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6012A

AUTORANGING

DC POWER SUPPLY

COPYRIGHT AND DISCLAIMER NOTICE

Copyright - Agilent Technologies, Inc. Reproduced with the permission of Agilent

Technologies Inc. Agilent Technologies, Inc. makes no warranty of any kind with regard

to this material including, but not limited to, the implied warranties of merchantability
and fitness for a particular purpose. Agilent Technologies, Inc. is not liable for errors
contained herein or for incidental or consequential damages in connection with the
furnishing, performance, or use of this material or data.

1-17

ACCESSORIES

HP Pert No. Description

l-18 The System II Cabinet accessories listed below may
be ordered with the power supply or separately from your local

Hewlett-Packard Sales end Service Office (see list of ad­dressee at the rear of this manuall.

HP Part No. Description

5061.CO89 Front handle kit for 5114 inch high cabinets.

1460.1345 Tilt stand 0) snaps into standard foot supplied
with instrument, must be used in pairs.

5061.CO77

5061X083 Rack flange/front handle kit for S-1/4 inch

Rack flange kit for 5114 inch high cabinets
(will be shipped with instrum&t if ordered es

Option 9081.

high cabinets (will be shipped with instrument
if ordered as Option 909).

Table l-l. Specifications, Model 6012A

1494-0018 Slide kit for installing 17.inch deep cabinet in

HP rack enclosure.

M844m5 Tilt slide kit, seme es 1494-0018 plus permits

tilting instrument up or down 90D.

14844023

5ow28os Control Board Extender card.

1-19

l-20 One manual is shipped with each power supply. Ad­ditional manuals may be purchased directly from your
Hewlett-Packard Sales office. Specify the model number, in­strument serial number prefix, and the manual part number
provided on the title page. (When ordered at the came time es
the power supply, additional manuals may be purchased by
adding Option 910 to the order and specifying the number of

additional manuals desired.1

Slide adapter kit, permits use of 1494-0018 kit
in non-HP rack enclosure of adequate depth.

ORDERING ADDITIONAL MANUALS

local

All performance specifications are at rear terminals with a
resistive load.

INPUT POWER

Two internal switches and two internal jumpers permit

operation from 120,220, or24OVac (- 13%. +8%); 48-63 Hz.

Maximum input current is 24 A rms for 120 Vat, 15 A rms for

220 Vat, and 14 A rms for 240 Vat.

EFFICIENCY (Typical):

80% on maximum output povver boundary.

INPUT PROTECTION:

The ec input is protected by a rear-panel mounted 25 A cir-

cuit breaker.

PEAK INRUSH CURRENT (Maximum)

120 Vat, 31.5 A
220 Vat, 13.3 A
240 Vat, 14.3 A

DC OUTPUT:

Adjustable from 0 to 80V and 0 to SO A. Maximum output

power is 1000 W et 50A. 1050 W et SOV, and approximately

12CO W et mid-range. See graph:

LOAD EFFECT (LOAD REGULATION):

Constant Voltage - Less than 0.01% of output voltage plus
5 mV for a load change equal to the maximum available cur­rent rating of the supply et the set voltage.

Constant Current Lees than 0.01% of output current

plus 5 mA for a load change equal to the maximum available

voltage rating of the supply et the set current.

Table l-l. Specifications, Model 6012A Icontinued)

.

SOURCE EFFECT (LINE REGULATION):

Constant Voltage - Less than 0.01% of output voltage plus

3 mV for any line voltage change within rating.

Constant Current Less than 0.01% of output current

plus 5 mA for any line voltage change within rating.

PARD (Ripple and Noise), 20 Hz to 20 MHz:

Constant Voltage Less than 5 mV rms and 50 mV p-p.
Constant Current - Less than 25 mA rms.

TEMPERATURE COEFFICIENT:

Constant Voltage - Less than 0.01% plus 2 mV change in
output per degree Celsius change in ambient after 30.minute
WX!ll”p.

co”stant Current Less than 0.01% plus 4 mA change

in output per degree Celsius change in ambient after

30.minute warmup.

DRIFT (Stability):

(Change in output over an B-hour interval under constant

line, load, and ambient temperature after 30.minute warmup).

Constant Voltage - Less than 0.03% of output plus 5 mV.
Constant Current - Less than 0.03% of output plus 5 mA.

LOAD TRANSIENT RECOVERY TIME:

Less than 2 ms is required for output voltage recovery (in
constant voltage operation) to within 100 mV of the nominal
output following a change in output current of 10% of max­imum current rating at any output voltage (output current

Z5Al.

RESOLUTION:

(Minimum output voltage or current change that can be ob-

tained using the 10.turn front-panel controls).

Constant Voltage - 20 mV
Constant Current 20 mA

OUTPUT IMPEDANCE

(Typical);

0.2 ml2 ~$3 dc. See graph:

OVERVOLTAGE PROTECTION:

Trip voltage adjustable from 2 V to 63V. Minimum setting

above output voltage to avoid false tripping is 1.5 V + 1% of
VOUT.

REVERSE VOLTAGE PROTECTION:

(Maximum permissible current caused by reveree voltage
impressed across output terminals) 50 A continuous, 20 A
continuous with ac power off.

REMOTE SENSING:

Maintains nominal voltage at load by correcting for load-

lead voltage drop of up to 0.5V per lead.

REMOTE PROGRAMMING:

Resistance Programming - 0 to 2.5 k provides zero to max­imum rated voltage or currant output.
Accuracy: CV; 1% + 3 mV CC; 2.5% + 15mA

Voltage Programming . 0 to 5V provides zero to maximum
rated voltage 0, current output.
Accuracy: CV; 0.3% + 3 mV CC: 1% +15mA

Current Programming - 2 mA to 0 mA current sink provides

zero to maximum rated voltage or current output (with user-

provided 2.5k resistor).

Accuracy: CV; 0.3% + 0.42V + accuracy of resistor

CC; 1% + O.gA + accuracy of resistor

PROGRAMMING RESPONSE TIME:

Maximum time for output voltage to change from 0 V to

60 V or 60 V to 2 V end settle within 200 mV band.

Up: Full load l3.4W 120 ms

No Load 120 ms

Down: Full Load (3.4W

No Load

400 Ins

1.2s

Typical response time to settle within 200 mV band, for

excursions other than full-scale.

Down: On graph, read difference in time between initial out-

put voltage and final output voltage; add settling time of 200

ms @ full load or 330 nw @ no load.

DC OUTPUT ISOLATION:

Either output terminal may be floated up to f240 Vdc

lit-&ding output voltage1 from ground.

Table l-l. Specifications, Model 6012A (continued)

Up: On graph, reed time for change in output voltage.

CURRENT MONITORING OUTPUT:

0 to 5 V output from rear-panel terminal indicates zero to
maximum rated current output; accuracy, 1% + 10 mV; out­put impedance, 10k.

METERS AND INDICATORS:

Voltmeter Continuously reading 70 V scale with secondary
scale indicating amperes available; accuracy, * 3% of full
scale.

Ammeter - Continuously reading SO A scale with secondary
scale indicating volts available; accuracy, i 3% of full scale.

VOLTAGE Indicator Green LED indicates Constant
Voltage operation.

CURRENT Indicator - Green LED indicates Constant Cur­rent operation.

OUTPUT UNREGULATED Indicator - Red LED indicates
that output is unregulated because of any of the following
conditions: overrange operation, overvoltage, over
temperature, or low-input-power shutdown.

OVP Indicator - Red LED indicates shutdown caused by
voltage at output terminals exceeding preset limit.

OVERTEMPERATURE Indicator - Red LED indicates shut-

down because of FET or output diode overtemperature.

MULTIPLE UNIT OPERATION:

Auto Parallel _ Any number of unite may be connected in
parallel to increase total output current capability while main­taining control from a single unit.

Auto-Series - Up to four units (eight if center-tapped to
ground). may be connected in series to increase total output
voltage to 240 Vdc #SO Vdc if center-tapped to ground1 while

maintaining control from a single unit.

Auto-Tracking _ Any number of units may have either one of
their output terminals connected to a common bus so that all
outputs track, at some fraction, the output of a single,
controlled. unit.

TEMPERATURE RATINGS: ’

Operating: 0 to +50°C

Unit is fan cooled. Thermostats turn off unit if FET or output

diode temperatures rise above a critical level; reset
automatically.

BACKPRESSURE:

Unit will operate against static backpressure et air outlet
(rear panel) of up to 0.06 inches of water (air inlet at 0 inches

of water).

CERTIFICATION:

Unit complies with these requirements:

IEC 348 - Safety Requirements for Electronic Measuring

Apparatus.

CSA Electrical Bulletin 5565 - Electronic Instruments and

Scientific Apparatus for Special Use and Applications.

VDE 087116.78 Level A RFI Suppression of Radio Frequency

Equipment for Industrial, Scientific, and Medical IISM)
and Similar Purposes.

VDE 0411 - Electronic Measuring Instruments and Automatic

Controls.

DIMENSIONS:

See Figure 2-l.

WEIGHT:

Net: 15 kg I33 lb)

Storage: -40 to +75OC

Shipping: 16 kg (35 lb)

SECTION V

MAINTENANCE

5-1 lNTRODUCTlON

5-2 Upon receipt of the power supply, the performance

test lParaoranh 5-51 can be made. This test is suitable for in.

coming inspection. If a fault is detected in the power supply
while making the performance test or during normal opera­tion. proceed to the troubleshooting procedures. After
troubleshooting end repair IParagraph 5-52). perform any
“scesss~ adjustments and calibration (Paragraph 5-86).

’ Table 5-l. Test Equipment Required

REQUIRED

TYPE

,

Oscilloscope

Oigital Multimeter

Electronic Load

Variable Voltage

Autotransformer

Sensitivity: 1 mV

Bandwidth: 20 MHz

Sensitivity: 1 fiV Measure at end dc voltages,

Input Impedance: IO Mfl (minimum)

Accuracy: 0.02% 6% digit
Voltage Range: WV

Current Ranse: 50A
Power Rang;: 12M)w
Open end short circuit witches
Variable at 30 Hz rate

Voltage Range: see Paragraph 2-15 Vary ec input for line
4 WA (minimum)

CHARACTERISTICS

Before returning the power supply fo normal operation, repeat
the applicable portions of the performance test to ensure that
the fault has bee” properly Corrected and that no other faults
exist.

5-3 TEST EQUIPMENT REQUIRED

Table 5-l list9 the test squ~pment required to perform

z-4
the various procedures described in this section.

RECOMMENDED

USE MODEL

Tr&bleshooting; meewre ripple,

noise spikes, and load

transient rasponse

troubleshooting. and calibration

Power SUPPIY load

regulation measurement,
troubleshooting

HP 174OA

HP 3455A

Transistor Devices
Model DLP 130.50-2500

DC Power Supply

Current-Measuring

Trsnsf0rr”er

Current-Monitoring

Resistor

Isolation Transformer

Terminating Resistors

Blocking Capacitors

True RMS Reading

Bandwidth: 10 MHz
Sensitivity: 1 mV

Voltage Range:

current Range: 0 to 6A

Able to pees 50 A dc without
saturating

Bandwidth: 20 Hz to 20 MHz
output voltage of at least 1 mv
for 1 mA input

Value: 50 mV @I 53A (1 ma)

Accuracy: 1% or better

4 kVA lminimuml
Value: 50 n+ 5%, Non-inductive

(four required)

Value: 0.01 pF. 1W Vdc, W#o

required)

0 to 2ov

Measure ripple

Troubleshooting, slow­etert procedure

Consant Current PARD test

Measure output current,
calibration

Troubleshooting

Noise spike measurement

Noise spike measurement

5-l

HP WA

HP 6024A

Tektronix Model P6303
Probe/AMS03 Amplifier
(must be used with
TMSM)-seriw power

module)
Weston Instrument Shun

Model 9992. Catalog
#41218, 50 mV @WA

..”