Datasheet

LOW LEVEL MEASURE & SOURCE
www.keithley.com
1.888.KEITHLEY
(U.S. only)
A Greater Measure of Confidence
GENERAL
AMMETER INPUT CONNECTOR: Three lug triaxial on
rear panel.
ANALOG OUTPUT CONNECTOR: Two banana jacks on
rear panel.
VOLTAGE SOURCE OUTPUT CONNECTOR: Two banana
jacks on rear panel.
INTERLOCK CONNECTOR: 4 pin DIN.
TRIGGER LINE: Available, see manual for usage.
DISPLAY: 12 character vacuum fluorescent.
DIGITAL FILTER: Median and averaging (selectable from
2 to 100 readings).
RANGING: Automatic or manual.
AUTORANGING TIME
3
: <250ms (analog filter off, 1PLC).
OVERRANGE INDICATION: Display reads “OVRFLOW.”
CONVERSION TIME: Selectable 0.01PLC to 60PLC (50PLC
under 50Hz operation). (Adjustable from 200µs to 1s)
READING RATE:
To internal buffer 1000 readings/second
1
To IEEE-488 bus 900 readings/second
1, 2
BUFFER: Stores up to 3000 readings.
PROGRAMS: Provide front panel access to IEEE address,
choice of engineering units or scientific notation, and
digital calibration.
EMC: Conforms with European Union Directive 89/336/
EEC, EN61326-1.
SAFETY: Conforms with European Union Directive 73/23/
EEC, EN61010-1, CAT I.
ENVIRONMENT:
Operating: 0°–50°C; relative humidity 70% non-
condensing, up to 35°C. Above 35°C, derate humidity
by 3% for each °C.
Storage: –10°C to +65°C.
WARM-UP: 1 hour to rated accuracy (see manual for rec-
ommended procedure).
POWER: 100–120V or 220–240V, 50–60Hz, (50VA).
PHYSICAL:
Case Dimensions: 90mm high × 214mm wide ×
369mm deep (3½ in. × 8
3
⁄8 in. × 14
9
⁄16 in.).
Working Dimensions: From front of case to rear
including power cord and IEEE-488 connector:
394mm (15.5 inches).
NET WEIGHT: <4.7 kg (<10.3 lbs).
NOTES
1. 0.01PLC, digital filters off, front panel off, auto zero off.
2. Binary transfer mode. IEEE-488.1.
3. Measured from trigger in to meter complete.
Typical Analog
5 ½ Digit Accuracy (1 Year)
1
Rise Time (10% to 90%)
3
Default ±(% rdg. + offset) Typical Damping
4
Range Resolution 18°–28°C, 0–70% RH RMS Noise
2
Off On
2 nA 10 fA 0.3 % + 400 fA 20 fA 4 ms 80 ms
20 nA 100 fA 0.2 % + 1 pA 20 fA 4 ms 80 ms
200 nA 1 pA 0.15% + 10 pA 1 pA 300 µs 1 ms
2 µA 10 pA 0.15% + 100 pA 1 pA 300 µs 1 ms
20 µA 100 pA 0.1 % + 1 nA 100 pA 110 µs 110 µs
200 µA 1 nA 0.1 % + 10 nA 100 pA 110 µs 110 µs
2 mA 10 nA 0.1 % + 100 nA 10 nA 110 µs 110 µs
20 mA 100 nA 0.1 % + 1 µA 10 nA 110 µs 110 µs
TEMPERATURE COEFFICIENT: 0°–18°C & 28°–50°C. For each °C, add 0.1 × (% rdg + offset) to accuracy spec.
INPUT VOLTAGE BURDEN: <200µV on all ranges except <1mV on 20mA range.
MAXIMUM INPUT CAPACITANCE: Stable to 10nF on all nA ranges and 2µA range; 1µF on 20µA and 200µA ranges, and on
mA ranges.
MAXIMUM CONTINUOUS INPUT VOLTAGE: 505 VDC.
NMRR
1
: (50 or 60Hz): 60dB.
ISOLATION (Ammeter Common or Voltage Source to chassis): Typically >1×10
11
W in parallel with <1nF.
MAXIMUM COMMON MODE VOLTAGE (between chassis and voltage source or ammeter): 505 VDC.
ANALOG OUTPUT: Scaled voltage output (inverting 2V full scale on all ranges): 2.5% ±2mV.
ANALOG OUTPUT IMPEDANCE
3
: <100W, DC–2kHz.
VOLTAGE SOURCE:
Accuracy
5
Noise Typical Typical
Range Step Size ±(% prog. + offset) (p-p) Temperature Rise Time
6, 8
Fall Time
7, 8
(Max.) (typical) 18°–28°C, 0–70% R.H. 0.1–10 Hz Coefficient (10%–90%) (90%–10%)
±10.100 200 µV 0.1 % + 1 mV <50 µV (0.005% + 20 µV)/°C 250 µs 150 µs
±50.500 1 mV 0.1 % + 4 mV <150 µV (0.005% + 200 µV)/°C 250 µs 300 µs
±505.00 10 mV 0.15% + 40 mV <1.5 mV (0.008% + 2 mV)/°C 4.5 ms 1 ms
SELECTABLE CURRENT LIMIT: 2.5mA, 250µA, 25µA for 50V and 500V ranges, 25mA additional limit for 10V range. All current lim-
its are –20%/+35% of nominal.
WIDEBAND NOISE
9
: <30mVp-p 0.1Hz–20MHz.
TYPICAL TIME STABILITY: ±(0.003% + 1mV) over 24 hours at constant temperature (within 1°C, between 18°–28°C, after 5 minute
settling).
OUTPUT RESISTANCE: <2.5W.
VOLTAGE SWEEPS: Supports linear voltage sweeps on fixed source range, one current or resistance measurement per step.
Maximum sweep rate: 200 steps per second. Maximum step count 3000. Optional delay between step and measure.
RESISTANCE MEASUREMENT (V/I): Used with voltage source; resistance calculated from voltage setting and measured current.
Accuracy is based on voltage source accuracy plus ammeter accuracy. Typical accuracy better than 0.6% for readings between 1kW
and 1TW.
ALTERNATING VOLTAGE RESISTANCE MEASUREMENT: Offers alternating voltage resistance measurements for resistances from
10
9
W to 10
15
W. Alternates between 0V and user-selectable voltage up to ±505V.
NOTES
1. At 1 PLC – limited to 60 rdgs/s under this condition.
2. At 6 PLC, 1 standard deviation, 100 readings, filter off, capped input – limited to 10 rdgs/sec under this condition.
3. Measured at analog output with resistive load >2kW.
4. Maximum rise time can be up to 25% greater.
5. Accuracy does not include output resistance/load regulation.
6. Rise Time is from 0V to ± full-scale voltage (increasing magnitude).
7. Fall Time is from ± full-scale voltage to 0V (decreasing magnitude).
8. For capacitive loads, add C·∆V/ILimit to rise time, and C·∆V/1mA to fall time.
9. Measured with LO connected to chassis ground.
REMOTE OPERATION
IEEE-488 BUS IMPLEMENTATION: SCPI (IEEE-488.2,
SCPI-1996.0); DDC (IEEE-488.1).
LANGUAGE EMULATION: Keithley Model 486/487
emulation via DDC mode.
RS-232 IMPLEMENTATION:
Supports: SCPI 1996.0.
Baud Rates: 300, 600, 1200, 2400, 4800, 9600, 19.2k,
38.4k, 57.6k.
Protocols: Xon/Xoff, 7 or 8 bit ASCII, parity-odd/even/
none.
Connector: DB-9 TXD/RXD/GND.
6487
Picoammeter/ Voltage Source
Model 6487 specifications Model 6487 specifications