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BK Precision 5491A - Multimeter (Discontinued Product - See Replacement below)
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BK Precision 5491A - Multimeter (Discontinued Product - See Replacement below)
Discontinued Product - Replaced by the following: BK 5491B - True RMS Bench Digital Multimeter The model 5491A is a very accurate 50,000 count, dual display, true RMS bench multimeter.
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 Specifications
DC Voltage | Resolution, Full Scale Reading and Accuracy | Range | Resolution | Full Scale Reading | Accuracy (1 year) | Typical Input Impedance (2) | 500mV 5V 50V500V 1000V | 10µV 100µV 1mV 10mV 100mV | 510.00 5.1000 51.000 510.00 1200.0 (1) | 0.02% + 4 0.02% + 4 0.02% + 4 0.02% + 4 0.02% + 4 | 10.0MΩ 11.1MΩ 10.1MΩ 10.0MΩ 10.0MΩ | (1) In 1000V range, 1200V is readable with audio warning. (2) Input Impedance is in paralleled with capacitance <100pF. | * Maximum input voltage: 1200Vdc or peak ac on any range * Response Time: Approximately 1.0 second when the displayed reading reaches 99.9% dc value of the tested input signal at the same range. Note: when voltage (ac+dc) measurement is selected, the Vdc input impedance is paralleled with an ac-coupled 1.1MΩ ac divider. |
Noise Rejection Ratio | CMRR (1) | NMRR (2) | >90dB at dc, 50/60Hz ± 0.1% (1kΩ Unbalanced) | >50dB at 50/60Hz ± 0.1% | (1) CMRR is the Common Mode Reject Ratio (2) NMRR is the Normal Mode Rejection Ratio |
AC Voltage (True RMS, AC Coupling) | Resolution, Full Scale Reading and Accuracy | Range | Resolution | Full Scale Reading | Accuracy (1 year) (1) | 30 to 50 Hz | 50 to 10k Hz | 10k to 30k Hz | 30k to 100k Hz | 500mV 5V 50V 500V 750V | 10µV 100µV 1mV 10mV 100mV | 510.00 5.1000 51.000 510.00 1000.0 (1) | 1% + 40 1% + 20 1% + 20 Not specified Not Specified | 0.5% + 40 0.35% + 15 0.35% + 15 0.5% + 15 0.5% + 15 (4) | 2% + 60 1% + 20 1% + 20 1% + 20 (3) 1% + 20 (3) | 3% + 120 3% + 50 3% + 50 3% + 50 (3) Not Specified | (1) In 750V range, 1000.0V is readable with audio warning. (2) Accuracy specified at input >5% of Range. (3) Input Voltage < 200V rms. (4) For 5k ~ 10k Hz, the accuracy is 0.7% + 15. | * Measurment method: true RMS * Maximum Crest Factor: 3.0 at full scale * Maximum input voltage: 1000V rms, 1400V peak ac 2x107 V-Hz product on any range, normal mode input 1x106 V-Hz product on any range, common mode input * Input Impedance: 1MΩ in parallel with capacitance <100pF * Response Time: Approximately 1.5 seconds when the displayed reading reaches 99.9% ac rms value of the tested input signal at the same range. | | | | | | | | | |
DC Current | Resolution, Full Scale Reading and Accuracy | Range | Resolution | Full Scale Reading | Accuracy (1 year) | Burden Voltage(1) & Shunt Resistor | 500µA 5mA 50mA500mA 5A 10A | 10nA 100nA 1µA 10µA 100µA 1mA | 510.00 5.1000 51.000 510.00 5.1000 20.000 (2) | 0.05% + 5 0.05% + 4 0.05% + 4 0.05% + 4 0.25% + 5 0.25% + 5 | <0.06V / 100Ω <0.6V / 100Ω <0.08V / 1Ω <0.8V / 1Ω <0.3V / 0.01Ω <0.6V / 0.01Ω | (1) Typical at full scale reading and voltage across the input terminals. (2) In 10A range, >10~20Adc is readable for 20 seconds maximum with audio warning. | * Response Time: Approximately 1.0 second when the displayed reading reaches 99.9% dc value of the tested input signal at the same range. | | | | | | | |
AC Current (True RMS, AC Coupling) | Resolution, Full Scale Reading and Burden Voltage | Range | Resolu-tion | Full Scale Reading | Accuracy(1 year) (5) | Burden Voltage (1) &Shunt Resistor | 30 to 50 Hz | 50 to 2k Hz | 2k to 5k Hz | 5k to 20k Hz | 500µA 5mA 50mA 500mA | 10nA 100nA 1µA 10µA | 510.00 5.1000 51.000 510.00 | 1.5% + 50 1.5% + 40 1.5% + 40 1.5% + 40 | 0.5% + 20 0.5% + 20 0.5% + 20 0.5% + 20 | 1.5% + 50 1.5% + 40 1.5% + 40 1.5% + 40 | 3% + 75(4) 3% + 60 3% + 60 3% + 60 | <0.06V / 100Ω <0.6V / 100Ω <0.08V / 1Ω <0.8V / 1Ω | 5A 10A | 100µA 1mA | 5.1000 20.000(2) | 2% + 40(3) 2% + 40(3) | 0.5% + 30 (<1kHz) | Not Specified | <0.3V / 0.01Ω <0.6V / 0.01Ω | (1) Typical at full scale reading and voltage across the input terminals (2) In 10A range, >10~20Aac is readable for 20 seconds maximum with audio warning. (3) Input Current < 3 Arms. (4) Input Current > 35µArms. (5) Accuracy specified at input >5% of range and >1A for 10A range except other specified. | * Measurement method: True RMS * Maximum Crest Factor: 3.0 at full scale * Response Time: Approximately 1.5 seconds when the displayed reading reaches 99.9% ac rms value of the tested input signal at the same range. | | | | | | | | | | |
AC Voltage (True RMS, AC+DC Coupling) | Resolution, Full Scale Reading and Accuracy | Range | Resolution | Full Scale Reading | Accuracy (1 year) (2) | 50 to 10k Hz | 10k to 30k Hz | 30k to 100k Hz | 500mV 5V 50V 500V 750V | 10µV 100µV 1mV 10mV 100mV | 510.00 5.1000 51.000 510.00 1000.0 (1) | 0.5% + 50 0.5% + 25 0.5% + 25 0.5% + 25 0.5% + 25 (4) | 2% + 70 1% + 30 1% + 30 1% + 30 (3) 1% + 30 (3) | 3% + 130 3% + 60 3% + 60 3% + 60 (3) Not Specified | (1) In 750V range, 1000.0V is readable with audio warning. (2) Accuracy specified at input >5% of range. (3) Input Voltage < 200V rms. (4) For 5k~10k Hz, the accuracy is 0.7% + 25. | * Measurement method: True RMS * Maximum Crest Factor: 3.0 at full scale * Maximum input voltage: 1000V rms, 1400V peak ac 2x107 V-Hz product on any range, normal mode input 1x106 V-Hz product on any range, common mode input * Input Impedance: 1MΩ in parallel with capacitance <100pF * Response Time: Approximately 1.5 seconds when the displayed reading reaches 99.9% ac rms value of the tested input signal at the same range. |
AC Current (True RMS, AC+DC Coupling) | Resolution, Full Scale Reading and Burden Voltage | Range | Resolution | Full Scale Reading | Accuracy (1 year) (4) | Burden Voltage (1) &Shunt Resistor | 50 to 2k Hz | 2k to 5k Hz | 5k to 20k Hz | 500µA 5mA 50mA 500mA | 10nA 100nA 1µA 10µA | 510.00 5.1000 51.000 510.00 | 0.5% + 30 0.5% + 30 0.5% + 30 0.5% + 30 | 1.5% + 60 1.5% + 50 1.5% + 50 1.5% + 50 | 3% + 85(3) 3% + 70 3% + 70 3% + 70 | Specifications
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DC Voltage | Resolution, Full Scale Reading and Accuracy | Range | Resolution | Full Scale Reading | Accuracy (1 year) | Typical Input Impedance (2) | 500mV 5V 50V500V 1000V | 10µV 100µV 1mV 10mV 100mV | 510.00 5.1000 51.000 510.00 1200.0 (1) | 0.02% + 4 0.02% + 4 0.02% + 4 0.02% + 4 0.02% + 4 | 10.0MΩ 11.1MΩ 10.1MΩ 10.0MΩ 10.0MΩ | (1) In 1000V range, 1200V is readable with audio warning. (2) Input Impedance is in paralleled with capacitance <100pF. | * Maximum input voltage: 1200Vdc or peak ac on any range * Response Time: Approximately 1.0 second when the displayed reading reaches 99.9% dc value of the tested input signal at the same range. Note: when voltage (ac+dc) measurement is selected, the Vdc input impedance is paralleled with an ac-coupled 1.1MΩ ac divider. |
Noise Rejection Ratio | CMRR (1) | NMRR (2) | >90dB at dc, 50/60Hz ± 0.1% (1kΩ Unbalanced) | >50dB at 50/60Hz ± 0.1% | (1) CMRR is the Common Mode Reject Ratio (2) NMRR is the Normal Mode Rejection Ratio |
AC Voltage (True RMS, AC Coupling) | Resolution, Full Scale Reading and Accuracy | Range | Resolution | Full Scale Reading | Accuracy (1 year) (1) | 30 to 50 Hz | 50 to 10k Hz | 10k to 30k Hz | 30k to 100k Hz | 500mV 5V 50V 500V 750V | 10µV 100µV 1mV 10mV 100mV | 510.00 5.1000 51.000 510.00 1000.0 (1) | 1% + 40 1% + 20 1% + 20 Not specified Not Specified | 0.5% + 40 0.35% + 15 0.35% + 15 0.5% + 15 0.5% + 15 (4) | 2% + 60 1% + 20 1% + 20 1% + 20 (3) 1% + 20 (3) | 3% + 120 3% + 50 3% + 50 3% + 50 (3) Not Specified | (1) In 750V range, 1000.0V is readable with audio warning. (2) Accuracy specified at input >5% of Range. (3) Input Voltage < 200V rms. (4) For 5k ~ 10k Hz, the accuracy is 0.7% + 15. | * Measurment method: true RMS * Maximum Crest Factor: 3.0 at full scale * Maximum input voltage: 1000V rms, 1400V peak ac 2x107 V-Hz product on any range, normal mode input 1x106 V-Hz product on any range, common mode input * Input Impedance: 1MΩ in parallel with capacitance <100pF * Response Time: Approximately 1.5 seconds when the displayed reading reaches 99.9% ac rms value of the tested input signal at the same range. | | | | | | | | | |
DC Current | Resolution, Full Scale Reading and Accuracy | Range | Resolution | Full Scale Reading | Accuracy (1 year) | Burden Voltage(1) & Shunt Resistor | 500µA 5mA 50mA500mA 5A 10A | 10nA 100nA 1µA 10µA 100µA 1mA | 510.00 5.1000 51.000 510.00 5.1000 20.000 (2) | 0.05% + 5 0.05% + 4 0.05% + 4 0.05% + 4 0.25% + 5 0.25% + 5 | <0.06V / 100Ω <0.6V / 100Ω <0.08V / 1Ω <0.8V / 1Ω <0.3V / 0.01Ω <0.6V / 0.01Ω | (1) Typical at full scale reading and voltage across the input terminals. (2) In 10A range, >10~20Adc is readable for 20 seconds maximum with audio warning. | * Response Time: Approximately 1.0 second when the displayed reading reaches 99.9% dc value of the tested input signal at the same range. | | | | | | | |
AC Current (True RMS, AC Coupling) | Resolution, Full Scale Reading and Burden Voltage | Range | Resolu-tion | Full Scale Reading | Accuracy(1 year) (5) | Burden Voltage (1) &Shunt Resistor | 30 to 50 Hz | 50 to 2k Hz | 2k to 5k Hz | 5k to 20k Hz | 500µA 5mA 50mA 500mA | 10nA 100nA 1µA 10µA | 510.00 5.1000 51.000 510.00 | 1.5% + 50 1.5% + 40 1.5% + 40 1.5% + 40 | 0.5% + 20 0.5% + 20 0.5% + 20 0.5% + 20 | 1.5% + 50 1.5% + 40 1.5% + 40 1.5% + 40 | 3% + 75(4) 3% + 60 3% + 60 3% + 60 | <0.06V / 100Ω <0.6V / 100Ω <0.08V / 1Ω <0.8V / 1Ω | 5A 10A | 100µA 1mA | 5.1000 20.000(2) | 2% + 40(3) 2% + 40(3) | 0.5% + 30 (<1kHz) | Not Specified | <0.3V / 0.01Ω <0.6V / 0.01Ω | (1) Typical at full scale reading and voltage across the input terminals (2) In 10A range, >10~20Aac is readable for 20 seconds maximum with audio warning. (3) Input Current < 3 Arms. (4) Input Current > 35µArms. (5) Accuracy specified at input >5% of range and >1A for 10A range except other specified. | * Measurement method: True RMS * Maximum Crest Factor: 3.0 at full scale * Response Time: Approximately 1.5 seconds when the displayed reading reaches 99.9% ac rms value of the tested input signal at the same range. | | | | | | | | | | |
AC Voltage (True RMS, AC+DC Coupling) | Resolution, Full Scale Reading and Accuracy | Range | Resolution | Full Scale Reading | Accuracy (1 year) (2) | 50 to 10k Hz | 10k to 30k Hz | 30k to 100k Hz | 500mV 5V 50V 500V 750V | 10µV 100µV 1mV 10mV 100mV | 510.00 5.1000 51.000 510.00 1000.0 (1) | 0.5% + 50 0.5% + 25 0.5% + 25 0.5% + 25 0.5% + 25 (4) | 2% + 70 1% + 30 1% + 30 1% + 30 (3) 1% + 30 (3) | 3% + 130 3% + 60 3% + 60 3% + 60 (3) Not Specified | (1) In 750V range, 1000.0V is readable with audio warning. (2) Accuracy specified at input >5% of range. (3) Input Voltage < 200V rms. (4) For 5k~10k Hz, the accuracy is 0.7% + 25. | * Measurement method: True RMS * Maximum Crest Factor: 3.0 at full scale * Maximum input voltage: 1000V rms, 1400V peak ac 2x107 V-Hz product on any range, normal mode input 1x106 V-Hz product on any range, common mode input * Input Impedance: 1MΩ in parallel with capacitance <100pF * Response Time: Approximately 1.5 seconds when the displayed reading reaches 99.9% ac rms value of the tested input signal at the same range. |
AC Current (True RMS, AC+DC Coupling) | Resolution, Full Scale Reading and Burden Voltage | Range | Resolution | Full Scale Reading | Accuracy (1 year) (4) | Burden Voltage (1) &Shunt Resistor | 50 to 2k Hz | 2k to 5k Hz | 5k to 20k Hz | 500µA 5mA 50mA 500mA | 10nA 100nA 1µA 10µA | 510.00 5.1000 51.000 510.00 | 0.5% + 30 0.5% + 30 0.5% + 30 0.5% + 30 | 1.5% + 60 1.5% + 50 1.5% + 50 1.5% + 50 | 3% + 85(3) 3% + 70 3% + 70 3% + 70 |
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