Keithley Instruments 580 Data Sheet

A-56

T.O.C.

ALPHA

INDEX

NUM.

INDEX

INST.

D ATA

ACQ.

SERVICE

GLOS­SARY

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LOW RESISTANCE MEASUREMENTS

580 Micro-ohmmeter

• 10µΩ sensitivity

• 20mV voltage clamp

• Selectable test current wave­forms

• 3 sets of test leads included

• Optional IEEE-488 interface

• Optional battery

ORDERING INFORMATION

580 Micro-ohmmeter with 5804,

580-1 Micro-ohmmeter without Test

580/5802 Micro-ohmmeter with Isolated

580/1978 Micro-ohmmeter with

580/02/78 Micro-ohmmeter with Isolated

This product is available with an

Warranty. See section C for complete order-

ing information.

5805, 5806 Test Leads and 5801
Test Lead Pouch

Leads and Pouch

Analog Output/IEEE-488
Interface

Rechargeable Battery Pack

Analog Output/IEEE-488
Interface and Rechargeable
Battery Pack

Extended

ACCESSORIES AVAILABLE

TEST LEADS

5804 Test Lead Set
5805 Kelvin Probes, 0.9m (3 ft)
5805-12 Kelvin Probes, 3.6m (12 ft)
5806 Kelvin Clip Leads
5807-7 Helical Spring Point

Test Leads

RACK MOUNT KITS

1010 Single Rack Mounting Kit
1017 Dual Rack Mounting Kit

OTHER

1978 Rechargeable Battery

Pack
5801 Test Lead Pouch
5802 Isolated Analog Output/IEEE-488

Interface

See page A-231 for descriptions of all acces­sories.

The 580 Micro-ohmmeter combines high accuracy, resolution, and sensitivity with three special
capabilities that make micro-ohm measurements easier and more versatile than ever:

1. When measuring contact and connector resistances, it is important not to puncture oxides and
films that may have formed. The 580 ensures this dry circuit condition by clamping the open circuit
test voltage to 20mV on the 200mΩ, 2Ω, and 20Ωranges when the 20mV MAX button is pressed.

2. The 580 can test more devices by enabling both test current polarity and waveform (DC or pulsed)
to be selected. When using pulsed test current, the 580 automatically compensates for thermoelec­tric EMFs. Tests on inductive devices are best performed using DC test current, as this avoids the
effects of time constants on pulsed current resistance measurements. For temperature-sensitive
components, a single trigger mode of operation minimizes power delivered to the device. Single
trigger operation is possible via the front panel.

3. The optional IEEE-488 bus interface
permits operation as a stand-alone
unit as well as in a PC-based system.

A microprocessor-based design gives
the 580 a number of advanced capabil­ities. Resistance measurements can be
made from 10µΩ to 200kΩ on seven
ranges, with 4

1

⁄2-digit resolution and
accuracy to within 0.04% of reading.
Ranging can be performed either man­ually or automatically. Settling time is
less than one second to within 10
counts on a given range.

The 580 is supplied with three sets of
test leads—standard leads, Kelvin
probes, and Kelvin clip leads—in a rug­ged strap-on pouch. For applications
requiring portability or line power iso­lation, an optional battery pack is also
available. Digital calibration is possible
through front panel controls or over
the optional IEEE-488 bus interface.

QUESTIONS?

1-800-552-1115 (U.S. only)

Call toll free for technical assistance,

product support or ordering information.

The 580 is supplied with three sets of test
leads—standard leads, Kelvin probes, and
Kelvin clip leads—in a rugged strap-on pouch.

LOW RESISTANCE MEASUREMENTS

T.O.C.

ALPHA

INDEX

NUM.

INDEX

INST.

D ATA

ACQ.

SERVICE

GLOS­SARY

SALES

REPS

LIT.

REQ.

PRINT

MAIN

MENU

580 Micro-ohmmeter

A-57

NON DRY CIRCUIT TEST DRY CIRCUIT TEST

MAXIMUM 1 Year, 18°–28°C POWER 1 Year, 18°–28°C

RANGE RESOLUTION CURRENT PULSED DC IN SAMPLE PULSED

200 mΩ 10 µΩ 100 mA 0.04 + 2 0.04 + 3 500 µW 0.05 + 2

2 Ω 100 µΩ 10 mA 0.04 + 2 0.04 + 3 50 µW 0.05 + 2

20 Ω 1mΩ 1 mA 0.04 + 2 0.04 + 3 5 µW 0.05 + 2

200 Ω 10 mΩ 1 mA 0.04 + 2 0.04 + 2

2kΩ 100 mΩ 1 mA 0.04 + 2 0.04 + 2

20 kΩ 1 Ω 10 µA 0.05 + 2 0.05 + 2

200 kΩ 10 Ω 10 µA 0.075 + 2 0.075 + 2

CONFIGURATION: 4-wire (two sense, two source).
MAXIMUM SOURCE VOLTAGE: 20mV in Dry Circuit Test, 1V

otherwise.

MAXIMUM TEST LEAD RESISTANCE
200mΩand 2ΩRanges:

10Ω in each SENSE lead with Non Dry Circuit Test; up to
the selected full range resistance in each SOURCE lead
and 10Ω in each SENSE lead with Dry Circuit Test.

20Ωthrough 200kΩ Ranges: Up to half of the selected range

in each test lead.

Up to 5Ω in each SOURCE lead and

TEST ±(%rdg + counts) DISSIPATION ±(%rdg + counts)

ACCURACY MAXIMUM ACCURACY

CONVERSION RATE: 3 readings/second typical.
RANGING: Auto or manual.
AUTORANGING TIME: 200 ms per range change, average.
SETTLING TIME: <1 second to within 10 counts on range.
MAXIMUM INPUT OVERLOAD: 10V limited to 10A.
MAXIMUM COMMON MODE VOLTAGE: 30V rms at DC, 50

or 60Hz.

TEMPERATURE COEFFICIENT (0°–18°C & 28°–50°C): ±(0.1

× applicable accuracy specification)/°C.

ISOLATED ANALOG OUTPUT/IEEE-488
INTERFACE (Model 5802 Option)

ANALOG OUTPUT
LEVEL:

1V = 10,000 counts on ×1 gain.

1V = 100 counts on
Maximum output voltage = ±4V.

ACCURACY: ±(0.25% of displayed reading + 2mV). In ×100 , 2mV output

= 0.2 displayed counts.

RESPONSE TIME: Follows display conversion rate.
OUTPUT RESISTANCE: 1000Ω.
ISOLATION: ANALOG OUTPUT LO is connected to IEEE COMMON.

Maximum common mode voltage from IEEE COMMON to earth
ground is 30V rms at DC, 50 or 60Hz.

×100 gain.

GENERAL

DISPLAY: ±20,000-count LCD, range and

status information displayed.

OVERRANGE INDICATION:“OL” displayed.
CONNECTORS: Measurement and rear panel

EXTERNAL TRIGGER inputs: Banana jacks.

RELATIVE: Allows zeroing of on-range read-

ings. Allows readings to be made with re­spect to baseline value. Display
annunciator indicates REL.

DRIVE: Selects either pulsed or DC SOURCE

current. Pulsed drive provides automatic
cancellation of thermal offsets, using 50%
duty cycle pulse. Display annunciator in­dicates drive selected.

POLARITY: Selects either positive or nega-

tive SOURCE current in either drive. Dis­play annunciator indicates polarity
selected.

TRIGGER: Allows single pulsed measurements.
OPERATING ENVIRONMENT: 0°–50°C, <80%

relative humidity up to 35°C; linearly derate
3% R.H./°C from 35° to 50°C.

STORAGE ENVIRONMENT: –25° to 60°C.
POWER: 105–125V or 210–250V (switch select-

ed), 90–110V available. 50–60Hz, 12VA.
Optional 6-hour battery pack, Model 1978.

DIMENSIONS,WEIGHT: 89mm high ×

241mm wide × 300mm deep (31⁄2in × 91⁄
in × 113⁄4in). Net weight 3.2kg (7 lb). Test
lead pouch adds 76mm (3 in) in height.

ACCESSORIES SUPPLIED: Models 5801,

5804, 5805, and 5806 test leads; Operator’s
and Service Manuals.

2

IEEE-488 BUS

IMPLEMENTATION

MULTILINE COMMANDS: DCL, SDC, GET,

GTL UNT, UNL, SPE, SPD, LLO.

UNILINE COMMANDS: IFC, REN, EOI, SRQ,

ATN .

INTERFACE FUNCTIONS: SH1, AH1, T5,

TE0, L4, LE0, SR1, RL0, PP0, DC1, DT1, C0,
E1.

PROGRAMMABLE PARAMETERS: Range,

DRY CIRCUIT TEST, Operate, RELative,
POLARITY, DRIVE, TRIGger, Calibration,
EOI, SRQ, Status, Data Format,
Terminator.

QUESTIONS?

1-800-552-1115 (U.S. only)

Call toll free for technical assistance,

product support or ordering information.