www.keithley.com

1.888.KEITHLEY (U.S. only)

A

GREA TER

MEASURE

OF

CONFIDENCE

486

Picoammeter

487

Picoammeter/Voltage Source

AMMETER

ANALOG OUTPUT

ACCURACY (1 Year)*

Rise Time (10%–90%)

18°–28°C

Analog Filter

RANGE

RESOLUTION

±(%rdg+offset)

OFF

ON

2nA

10 fA

0.3 + 500 fA

12 ms

70 ms

20

nA

100 fA

0.2 +

3 pA

4 ms

17 ms

200

nA

1 pA

0.15 + 20 pA

800 µs

4 ms

2µA10pA

0.15 + 200 pA

380 µs

2 ms

20 µA

100 pA

0.1 +

2 nA

160 µs

370 µs

200 µA

1 nA

0.1 + 20 nA

160 µs

370 µs

2mA

10 nA

0.1 + 200 nA

160 µs

370 µs

* When properly zeroed.

MAXIMUM OVERLOAD: 350V peak on nA ranges and 2µA range; 50V peak on 20µA, 200µA, and 2mA ranges.

Higher voltage sources must be current limited at 3mA.

INPUT VOLTAGE BURDEN: <200µV (18°–28°C) for inputs <100µA; <2mV for inputs

≥ 100µA; 20µV/°C tempera-

ture coefficient.

TEMPERATURE COEFFICIENT (0°–18°C & 28°–50°C): ±(0.15

× applicable accuracy specification)/ °C.

NMRR: >60dB at 50Hz (LINE 50Hz integration) or 60Hz (LINE 60Hz integration).

ANALOG OUTPUT:

Range: ±2V for full range input (non-inverting).

Accuracy: ±(2.5% + 3mV); resistive loads >2k

Ω; 18°–28°C.

Impedance: <100

Ω, DC–2kHz.

RANGING: Automatic or manual.

AUTORANGING TIME: <200ms to final range (analog filter OFF).

MAXIMUM READING RATES (readings/second):

EXTERNAL

TRIGGERED

VIA

INTEGRATION

CONTINUOUS INTO

INTO

IEEE-488

SETTING

RESOLUTION

DATA STORE

DATA STORE

BUS**

FAST

41⁄2-Digit

100

180

16

LINE 60Hz

51⁄2-Digit

40

44

14

LINE 50Hz

51⁄2-Digit

33

38

12

** One-shot on TALK, G7 data format.

VOLTAGE SOURCE (487 only):

ACCURACY

TEMPERATURE

RANGE

STEP

(1 Year)

NOISE

COEFFICIENT

(maximum

SIZE

18°–28°C

(p-p)***

0°–18°C &

value)

(typical)

±(%setting+offset)

0.1–10Hz

28°–50°C

±505.00 V

10 mV

0.15 + 40 mV

<1.5 mV

80 ppm +

2 mV/°C

±50.500 V

1 mV

0.1 + 4 mV

<150 µV

50 ppm + 200µV/°C

*** With LO terminal connected to chassis.

SELECTABLE CURRENT LIMIT: 2.5mA ±0.5mA or 25µA ±5µA.

WIDEBAND NOISE: <30mV p-p 0.1Hz to 20MHz.

TIME STABILITY: ±(0.003% + 1mV) over 24 hours at constant temperature.

OUTPUT RESISTANCE: <2.5

Ω.

V/I OHMS (487 only)

Used with voltage source; resistance calculated from voltage setting and measured current. V/I OHMS accuracy

equals voltage source accuracy plus ammeter accuracy. Typical accuracy better than 0.6% for readings between 1k

Ω

and 1T

Ω.

IEEE-488 BUS IMPLEMENTATION

PROGRAMMABLE PARAMETERS: All parameters programmable except for

IEEE-488 bus address and frequency for line integration.

TRIGGER TO FIRST BYTE: <50ms (trigger on TALK, ATN false to talker DAV

true, G7 data format).

GENERAL

DATA STORE and MIN/MAX: Stores up to 512 readings and identifies minimum

and maximum reading.

PROGRAMMABLE READING INTERVAL: 10ms to 999.999s in 1ms increments.

TRIGGER: One-shot or continuous from front panel, IEEE-488 bus, and rear

panel BNC.

PROGRAMMABLE TRIGGER DELAY: 1ms to 999.999s in 1ms increments.

DISPLAY: One ten character plus one eight character alphanumeric LED displays

with normal/dim/off intensity control.

MAXIMUM VOLTAGE BETWEEN VOLTAGE SOURCE AND CURRENT METER:

500V DC.

MAXIMUM VOLTAGE BETWEEN CHASSIS AND VOLTAGE SOURCE OR CUR-

RENT METER: 500V DC.

REAR PANEL CONNECTORS:

Input Connector: 3-lug triax.

Analog Output: 5-way binding post.

External Trigger and Meter Complete: BNC connectors.

IEEE-488 Connector: Chassis grounded.

Voltage Source Output (487 only): 5-way binding post.

Interlock Connector (487 only): 3-pin miniature DIN.

EMC: Conforms to European Union Directive 89/336/EEC.

SAFETY: Conforms to European Union Directive 73/23/EEC (meets EN61010-

1/IEC 1010).

ENVIRONMENT: Operating: 0°–50°C, <70% RH up to 35°C; linearly derate 3%

RH/°C, up to 50°C. Storage: –25° to 60°C.

WARM-UP: 2 hours to rated accuracy.

POWER: 105–125V AC or 210–250V AC (external switch selectable), 90–110V

and 180–220V AC version available. 50Hz or 60Hz, 45VA maximum.

DIMENSIONS: 90mm high

× 213mm wide × 397mm deep (31⁄2 in × 83⁄8 in ×

155⁄8 in).

ACCESSORIES AVAILABLE

CABLES

236-ILC-3

Safety Interlock Cable

237-ALG-2

Low Noise Cable

7078-TRX-3 3-Slot Male Triax to 3-Slot Male Triax Cable, 0.9m (3 ft)

ADAPTERS

6171

3-Slot Male Triax to 2-Lug Female Triax

6172

2-Slot Male Triax to 3-Lug Female Triax

7078-TRX-BNC

3-Slot Male Triax to BNC Adapter

TEST FIXTURE

8008

Resistivity Chamber

RACK MOUNTS

4288-1

Single Fixed Rack Mount Kit

4288-2

Dual Fixed Rack Mount Kit

4288-4

Dual Fixed Rack Mount Kit

486 Rear Panel

487 Rear Panel