Model 2001 Multimeter Specifications

REPETITIVE SPIKES ACCURACY¹⁶ 1 OR 2 YEARS, TCAL ±5 °C ±(% OF READING+% OF RANGE)

DEFAULT MEASUREMENT RESOLUTION: 3½ digits.

MAXIMUM INPUT: ±1100 V peak value, 2×10⁷ V•Hz (for inputs above 20 V).

NON-REPETITIVE SPIKES: 10% of range per µs typical slew rate.

SPIKE WIDTH: Specifications apply for spikes ≥ 1 µs.

RANGE CONTROL: In Multiple Display mode, voltage range is the same as DCV range.

SPIKES MEASUREMENT WINDOW: Default is 100ms per reading (settable from 0.1 s to 9.9 s in Primary Display mode).

INPUT CHARACTERISTICS: Same as ACV input characteristics.

SPIKES DISPLAY: Access as multiple display on DC Volts. First option presents positive peak spikes and highest spike since reset. Second option presents negative spikes and lowest spike. Highest and lowest spike can be reset by pressing DCV function button. Third option displays the maximum and minimum levels of the input signal. Spikes displays are also available through CONFIG-ACV-ACTYPE as primary displays.

---

¹⁶ Specifications apply for 10-reading digital filter. If no filter is used, add 0.25% of range typical uncertainty.

¹⁷ Specifications assume AC+DC coupling for frequencies below 200Hz. Below 20Hz, add 0.1% of reading additional uncertainty.

¹⁸ Add 0.001% of reading × (V_IN/100V)2 additional uncertainty for inputs above 100V.

---

AC VOLTS

AC MAGNITUDE: RMS or Average. Peak and Crest Factor measurements also available.

ACV INPUT CHARACTERISTICS

¹⁹ Temperature coefficient applies to RMS or average readings. For frequencies above 100kHz, add 0.01% of reading/°C to temperature coefficient.

AC VOLTAGE UNCERTAINTY = ± [(% of reading) × (measured value) + (% of range) × (range used)] / 100.

PPM ACCURACY = (% of accuracy) × 10,000.

0.015% OF RANGE = 30 counts for ranges up to 200V and 113 counts on 750V range at 5½ digits.

LOW FREQUENCY MODE RMS²⁰

90 days, ±2 °C from last AC self-calibration, for 1% to 100% of range²¹ ±(% of reading + % of range)

LOW FREQUENCY MODE RMS²⁰

1 or 2 years, TCAL ±5 °C for 1% to 100% of range²¹ ±(% of reading + % of range)

²⁰ Specifications apply for sine wave input, AC + DC coupling, 1 power line cycle, digital filter off, following 55 minute warm-up.

²¹ For 1% to 5% of range below 750 V range, and for 1% to 7% of 750 V range, add 0.01% to range uncertainty. For inputs from 200 kHz to 2 MHz, specifications apply above 10% of range.

²² Add 0.001% of reading × (V_IN/100V)² additional uncertainty above 100V_RMS.

NORMAL MODE RMS²⁰

90 days, ±2 °C from last AC self-calibration for 1% to 100% of range²¹ ±(% of reading + % of range)

NORMAL MODE RMS²⁰

1 or 2 years, TCAL ±5 °C for 1% to 100% of range²¹ ±(% of reading + % of range)

DB ACCURACY RMS

±dB, 90 days, 1 or 2 years, TCAL ±5 °C, Reference=1V, Autoranging, Low Frequency Mode, AC+DC Coupling

ACV READING RATES^{10, 23}

²³ For DELAY=0, digital filter off, display off (or display in “hold” mode). Internal Trigger, Normal mode. See Operating speed for additional detail. Aperture is reciprocal of line frequency. These rates are for 60Hz and (50Hz). Applies for RMS and average mode.  Low frequency mode rate is typically 0.2 readings per second.

AC COUPLING

For AC only coupling, add the following % of reading:

For low frequency mode below 200 Hz, specifications apply for sine wave inputs only.

AC+DC COUPLING

For DC > 20% of AC RMS voltage, apply the following additional uncertainty, multiplied by the ratio (DC/AC RMS). Applies to RMS and average measurements.

AVERAGE ACV MEASUREMENT

Normal mode RMS specifications apply from 10% to 100% of range, for 20Hz to 1MHz. Add 0.025% of range for 50 kHz to 100 kHz, 0.05% of range for 100 kHz to 200 kHz, and 0.5% of range for 200 kHz to 1 MHz.

ACV CREST FACTOR MEASUREMENT²⁴

CREST FACTOR: = Peak AC / RMS AC.

CREST FACTOR RESOLUTION: 3 digits

CREST FACTOR ACCURACY: Peak AC uncertainty + AC normal mode RMS uncertainty.

MEASUREMENT TIME: 100 ms plus RMS measurement time.

INPUT CHARACTERISTICS: Same as ACV input.

CREST FACTOR FREQUENCY RANGE: 20 Hz to 1 MHz.

CREST FACTOR DISPLAY: Access as multiple display on AC volts.

²⁴ Subject to peak input voltage specification.

HIGH CREST FACTOR ADDITIONAL ERROR ±(% of reading)

Applies to RMS measurements.

 

ACV PEAK VALUE MEASUREMENT²⁵

REPETITIVE PEAK ACCURACY, ±(% of reading+% of range), 90 days, 1 year or 2 years, T_CAL ±5 °C

DEFAULT MEASUREMENT RESOLUTION: 4 digits.

NON-REPETITIVE PEAK: 10% of range per µs typical slew rate for single spikes.

PEAK WIDTH: Specifications apply for all peaks ≥1 µs.

PEAK MEASUREMENT WINDOW: 100ms per reading.

MAXIMUM INPUT: ±1100 V_PEAK

SETTLING CHARACTERISTICS:

Normal Mode (RMS, avg.) <300 ms to 1% of step change

                         <450 ms to 0.1% of step change

                         <500 ms to 0.01% of step change

Low Frequency Mode (RMS) <5 s to 0.1% of final value

COMMON MODE REJECTION: For 1 kΩ imbalance in either lead: >60 dB for line frequency ±0.1%

MAXIMUM VOLT•Hz PRODUCT: 2 × 10⁷ V•Hz (for inputs above 20 V).

AUTORANGING: Autoranges up at 105% of range; down at 10% of range.

---

²⁵ Specifications apply for sine wave input with a 10-reading digital filter. If no filter is used, add 0.25% of range typical uncertainty.

²⁶ AC peak specifications assume AC + DC coupling for frequencies below 200 Hz.

²⁷ For overrange readings 200% to 300% of range, add 0.1% of reading. For 300% to 400% of range, add 0.2% of reading.

---

OHMS

TWO-WIRE AND FOUR-WIRE OHMS (2W and 4W ohms functions)²⁸

RESISTANCE ACCURACY³²

±(ppm of reading + ppm of range)

RESISTANCE UNCERTAINTY: = ±[ (ppm of reading) × (measured value) + (ppm of range) × (range used) ] / 1,000,000.

% ACCURACY: = (ppm accuracy) / 10,000.

1PPM OF RANGE: = 2 counts for ranges up to 200MΩ and 1 count on 1GΩ range at 6½ digits.

---

²⁸ When measuring resistance of inductive loads, the inductance of that load must be 10mH or less.

²⁹ Current source is typically ±9% of absolute accuracy.

³⁰ Total of the measured value and lead resistance cannot exceed full scale.

³¹ Maximum offset compensation plus source current times measured resistance must be less than source current times resistance selected.

³² Specifications are for 1 power line cycle, 10 reading digital filter, Auto Zero on, 4-wire mode, offset compensation on (for 20Ω to 20kΩ ranges).

³³ For T_CAL ±1 °C, following 55-minute warm-up. T_CAL is ambient temperature at calibration (23 °C at the factory).

³⁴ For T_CAL ±5 °C, following 55-minute warm-up.

³⁵ For 2-wire mode.

---

2-WIRE ACCURACY³⁴

±(ppm of range) when properly zeroed using the REL function with a 4-wire Kelvin short.

SPEED AND ACCURACY³⁶

SETTLING CHARACTERISTICS: For first reading following step change, add the total 90-day measurement error for the present range. Pre-programmed settling delay times are for <200 pF external circuit capacitance. For 200 MΩ and 1 GΩ ranges, add total 1 year errors for first reading following step change. Reading settling times are affected by source impedance and cable dielectric absorption characteristics.

OHMS MEASUREMENT METHOD: Constant current.

OFFSET COMPENSATION: Available on 20 Ω to 20 kΩ ranges.

OHMS VOLTAGE DROP MEASUREMENT: Available as a multiple display.

AUTORANGING: Autoranges up at 105% of range, down at 10% of range.

---

³⁶⁰ For T_CAL ±5 °C, 90-day accuracy. 1-year and 2-year accuracy can be found by applying the same speed accuracy ppm changes to the 1-year or 2-year base accuracy.

³⁷ Ohms measurements at rates lower than 1 power line cycle are subject to potential noise pickup. Care must be taken to provide adequate shielding.

---

2-WIRE RESISTANCE READING RATES^{10, 38}

20Ω, 200Ω, 2kΩ, and 20kΩ ranges

2-WIRE RESISTANCE READING RATES^{10, 38}

20MΩ range

---

³⁸ For DELAY=0, digital filter off, internal trigger, display off. Aperture is reciprocal of line frequency. These rates are for 60Hz and (50Hz). Speed for 200kΩ range is typically 10% slower than 20kΩ range; speed for 2MΩ range is typically 3 times faster than 20MΩ range; speed for 1GΩ range is typically 30% to 50% as fast as 20MΩ range. See the Operating speed section for additional detail.

---

DC AMPS 

DCI INPUT CHARACTERISTICS AND ACCURACY³⁹

³⁹ Add 50 ppm of range for current above 0.5 A for self-heating.

⁴⁰ Actual maximum voltage burden = (maximum voltage burden) × (I_MEASURED/I_{FULL SCALE}).

⁴¹ Specifications are for 1 power line cycle, Auto Zero on, 10 reading digital filter.

⁴² For T_CAL ±1 °C, following 55 minute warm-up.

⁴³ For T_CAL ±5 °C, following 55 minute warm-up.

---

DC CURRENT UNCERTAINTY = ±[ (ppm reading)x(measured value) + (ppm of range) × (range used)] / 1,000,000.

% ACCURACY = (ppm accuracy) / 10,000.

10PPM OF RANGE = 20 counts at 6½ digits

DCI READING RATES^{10, 44}

⁴⁴ For DELAY=0, digital filter off, display off. Internal trigger. Aperture is reciprocal of line frequency. These rates are for 60 Hz and (50 Hz). See the Operating speed section for additional detail.

---

SPEED AND ACCURACY⁴⁵

⁴⁵ For T_CAL ±5 °C, 90-day accuracy. 1-year and 2-year accuracy can be found by applying the same speed accuracy ppm changes to the 1-year or 2-year base accuracy.

SETTLING CHARACTERISTICS: <500µs to 50ppm of step size. Reading settling times are affected by source impedance and cable dielectric absorption characteristics. Add 50ppm of range for first reading after range change.

MAXIMUM ALLOWABLE INPUT: 2.1A, 250V.

OVERLOAD PROTECTION: 2A fuse (250V), accessible from front (for front input) and rear (for rear input).

AUTORANGING: Autoranges up at 105% of range, down at 10% of range.

DC IN-CIRCUIT CURRENT

The DC in-circuit current measurement function allows a user to measure the current through a wire or a circuit board trace without breaking the circuit. When the In-Circuit Current Measurement function is selected, the 2001 will first perform a 4-wire resistance measurement, then a voltage measurement, and will display the calculated current.

TYPICAL RANGES:

Current: 100µA to 12A.

Trace Resistance: 1mΩ to 10Ω typical.

Voltage: ±200mV maximum across trace

Speed: 4 measurements/second at 1 power line cycle

Accuracy: ±(5% + 2 counts). For 1 power line cycle, Auto Zero on, 10 reading digital filter, T_CAL±5 °C, after being properly zeroed. 90 days, 1 year, or 2 years.

MEASUREMENT RANGE CHART

 

---

AC AMPS

AC magnitude: RMS or Average

ACI INPUT CHARACTERISTICS

ACI ACCURACY^{47, 48}

90 days, 1 year or 2 years, TCAL ±5 °C, for 5% to 100% of range, ±(% of reading + % of range)

AC CURRENT UNCERTAINTY = ±[ (% of reading) × (measured value) + (% of range) × (range used) ] / 100.

PPM ACCURACY = (% accuracy) × 10,000.

0.015% OF RANGE = 30 counts at 5½ digits.

AC COUPLING

For AC only coupling, add the following % of reading.

AC+DC COUPLING

For DC>20% of AC RMS voltage, apply the following additional uncertainty, multiplied by the ratio (DC/AC RMS).

---

⁴⁶ Actual maximum voltage burden = (maximum voltage burden) × (I_MEASURED/I_{FULL SCALE}).

⁴⁷ Specifications apply for sine wave input, AC+DC coupling, 1 power line cycle, digital filter off, following 55-minute warm-up.

⁴⁸ Add 0.005% of range uncertainty for current above 0.5A RMS for self-heating.

---

ACI READING RATES^{10, 49}

SETTLING CHARACTERISTICS:

<300ms to 1% of step change

<450ms to 0.1% of step change

<500ms to 0.01% of step change

AUTORANGING: Autoranges up at 105% of range, down at 10% of range.

AVERAGE ACI MEASUREMENT: RMS specifications apply for 10% to 100% of range.

HIGH CREST FACTOR ADDITIONAL ERROR

±(% of reading)

Applies to RMS measurements.

FREQUENCY COUNTER

FREQUENCY/PERIOD INPUT CHARACTERISTICS AND ACCURACY

90 days, 1 year, or 2 years

	Frequency Range50	Period Range	Resolution	Minimum Signal Level51			Maximum Input	Trigger Level	Accuracy ±(% of reading)
				1Hz–1MHz	1–5MHz	5–15MHz
AC Voltage Input	1Hz–15MHz	67ns – 1s	5 digits	60mV	60mV	400mV	1100V pk50	0V–600V	0.03
AC Current Input	1Hz – 1MHz	1µs – 1s	5 digits	150µA	—	—	1A pk	0mA–600mA	0.03