True RMS model BM257 ACV & ACA accuracies are specified from 5 % to 100 % of range or otherwise specified.
Maximum Crest Factor <3:1 at full scale & <6:1 at half scale, and with frequency components fall within the meter specified frequency bandwidth for non-sinusoidal waveforms
AC & AC+DC Voltage
|
Function
|
RANGE
|
Accuracy
|
|
50Hz ~ 60Hz
|
|
mV
|
60.00mV, 600.0mV
|
0.5% + 3d
|
|
V
|
9.999V, 99.99V, 999.9V
|
|
40Hz ~ 500Hz
|
|
mV
|
60.00mV, 600.0mV
|
0.8% + 4d
|
|
V
|
9.999V, 99.99V
|
1.0%+4d
|
|
999.9V
|
2.0%+4d
|
|
500Hz ~ 1kHz
|
|
mV
|
60.00mV, 600.0mV
|
2.0% + 3d
|
|
V
|
9.999V, 99.99V
|
1.0%+4d
|
|
999.9V
|
2.0%+4d
|
|
1kHz ~ 3kHz
|
|
mV
|
60.00mV, 600.0mV
|
2%+3d
|
|
V
|
9.999V, 99.99V, 999.9V
|
3.0%+4d
|
|
3kHz ~ 20kHz
|
|
mV
|
60.00mV 1), 600.0mV 1)
|
2%+3d
|
|
V
|
9.999V, 99.99V
|
3dB
|
|
999.9V
|
Unspec’d
|
1) Specificied from 30% to of range.
CMRR:>60dB @ DC to 60Hz, Rs=1k W
Input Impedance: 10M W , 50pF nominal (80pF nominal for 600mV range)
Residual reading less than 5 digits with test leads shorted.
AutoCheckTM (ACV)
|
RANGE 1)
|
Accuracy
|
|
50Hz ~ 60Hz
|
|
9.999V, 99.99V, 999.9V
|
1.0%+4d
|
Lo-Z ACV Threshold:> 3VAC (50/60Hz) nominal
Lo-Z ACV Input Impedance:
Initially approx. 3.0k W , 150pF nominal; Impedance increases abruptly within
a fraction of a second as display voltage is above 50V (typical). Ended up impedances
vs display voltages typically are:
18k W @100V 125k W @ 300V
320k W @ 600V 460k W @ 1000V
dBm
At 600 W , -11.76dBm to 54.25dBm,
Accuracy: ± 0.25dB + 2d (@40Hz -- 20kHz)
Input Impedance: 10M W , 50pF nominal
Selectable reference impedance of 4, 8, 16, 32, 50, 75, 93, 110, 125, 135, 150, 200,
250, 300, 500, 600, 800, 900, 1000, 1200 W
DC Voltage
|
Function
|
RANGE
|
Accuracy
|
|
mV
|
60.00mV
|
0.12%+2d
|
|
600.0mV
|
0.06%+2d
|
|
V
|
9.999V, 99.99V, 999.9V
|
0.08%+2d
|
NMRR: >60dB @ 50/60Hz
CMRR: >110dB @ DC, 50/60Hz, Rs=1k W
Input Impedance: 10M W , 50pF nominal (80pF nominal for 600mV range)
AutoCheckTM (DCV)
|
RANGE
|
Accuracy
|
|
9.999V, 99.99V, 999.9V
|
0.5%+3d
|
Lo-Z DCV Threshold:
> +1.5VDC or < -1.0VDC nominal
Lo-Z DCV Input Impedance:
Initially approx. 3.0k W , 165pF nominal; Impedance increases abruptly within a fraction
of a second as display voltage is above 50V (typical). Ended up impedances vs display
voltages typically are:
18k W @100V 125k W @ 300V
320k W @ 600V 500k W @ 1000V
Ohms
|
RANGE
|
Accuracy
|
|
600.0 W , 6.000k W , 60.00k W , 600.0k W
|
0.1%+3d
|
|
6.000M W
|
0.4%+3d
|
|
60.00M W
|
1.5%+5d
|
|
99.99nS
|
0.8%+10d
|
Open Circuit Voltage: < 1.2VDC (< 1.0VDC for 60M W range)
AutoCheckTM (Ohms)
|
RANGE
|
Accuracy
|
|
600.0 W , 6.000k W , 60.00k W , 600.0k W
|
0.5%+4d
|
|
6.000M W
|
0.8%+3d
|
|
60.00M W
|
2.0%+5d
|
Open Circuit Voltage: < 1.2VDC (< 1.0VDC for 60M W range)
Audible Continuity Tester
Audible threshold: between 20 W and 300 W ; Response time < 100 m s
Diode Tester
|
RANGE
|
Accuracy
|
|
2.000V
|
1.0%+1d
|
Test Current (Typically): 0.4mA
Open Circuit Voltage: < 3.5 VDC
Temperature
|
RANGE
|
Accuracy
|
|
-50oC to 1000oC
|
0.3%+2oC
|
|
-58oF to 1832oF
|
0.3%+5oF
|
Type-K thermocouple range & accuracy not included
Capacitance
|
RANGE
|
Accuracy 1)
|
|
60.00nF, 600.0nF
|
0.8% + 3d
|
|
6.000 m F
|
1.0% + 3d
|
|
60.00 m F
|
2.0% + 3d
|
|
600.0 m F 2)
|
3.5% + 5d
|
|
6.000mF 2)
|
5.0% + 5d
|
|
25.00mF 2)
|
6.5% + 5d
|
1) Accuracies with film capacitor or better
2) In manual-ranging mode, measurements not specified below 50.0 mF, 0.54mF and
5.4mF for 600.0 mF, 6.000mF and 25.00mF ranges respectively
AC & AC+DC Current
|
RANGE
|
Accuracy
|
Burden voltage
|
|
BM82x 2)
|
BM52y 3)
|
|
50Hz ~ 60Hz
|
|
600.0 m A, 6000 mA
|
0.6%+3d
|
0.08mV/ m A
|
0.08mV/ m A
|
|
60.00mA
|
1.5mV/mA
|
2.1mV/mA
|
|
600.0mA
|
1.0%+3d
|
|
6.000A , 10.00A 1)
|
0.8%+6d
|
0.04V/A
|
0.02V/A
|
|
40Hz ~ 1kHz
|
|
600.0 m A, 6000 mA
|
0.8%+4d
|
0.08mV/ m A
|
0.08mV/ m A
|
|
60.00mA
|
1.5mV/mA
|
2.1mV/mA
|
|
600.0mA
|
1.0%+4d
|
|
6.000A , 10.00A 1)
|
0.8%+6d
|
0.04V/A
|
0.02V/A
|
1) 10A continuous, > 10A to 15A (to 20A for BM521 & BM525) for 30 second max with 5 minutes cool down interval
2) x=1, 2, 7 & 9; Model 821, 822, 827 & 829
3) y=1 & 5; Model 521 & 525
DC Current
|
RANGE
|
Accuracy
|
Burden voltage
|
|
BM82x 2)
|
BM52y 3)
|
|
600.0 m A, 6000 mA
|
0.2%+4d
|
0.08mV/ m A
|
0.08mV/ m A
|
|
60.00mA, 600.0mA
|
1.5mV/mA
|
2.1mV/mA
|
|
6.000A , 10.00A 1)
|
0.04V/A
|
0.02V/A
|
1) 10A continuous, > 10A to 15A (to 20A for BM521 & BM525) for 30 second max with 5 minutes cool down interval
2) x=1, 2, 7 & 9; Model 821, 822, 827 & 829
3) y=1 & 5; Model 521 & 525
Line Level Frequency (Hz)
|
Function Range
|
Frequency
|
Sensitivity (Sine RMS)
|
|
AC 60.00mV
|
15.00 ~ 50.00kHz
|
40mV
|
|
AC 600.0mV
|
60mV
|
|
AC 9.999V
|
15.00 ~ 10.00kHz
|
2.5V
|
|
AC 99.99V
|
25V
|
|
AC 999.9V
|
100V
|
|
AC 600.0 mA
|
15.00 ~ 3.000kHz
|
45uA
|
|
AC 6000 mA
|
600uA
|
|
AC 60.00mA
|
40mA
|
|
AC 600.0mA
|
60mA
|
|
AC 6.000A
|
4A
|
|
AC 10.00A
|
6A
|
Accuracy: 0.04%+4d
Crest mode (Instantaneous Peak Hold)
Accuracy: Specified accuracy adds 250 digits for changes > 1.0 ms in duration
Record mode
Accuracy: Specified accuracy adds 10 digits for changes > 100 ms in duration
Logic Level Frequency ( Hz) & Duty Cycle (D%)
|
@ DCmV Function
|
Range
|
Accuracy 1)
|
|
Frequency
|
5.00Hz ~ 1.000MHz
|
0.004%+4d
|
|
Duty Cycle
|
0.00% ~ 100.0%
|
3d/kHz+2d 2)
|
1) Sensitivity: 2.5Vp (Square wave) for 3V & 5V Logic Family
2) Specified Frequency: 5Hz ~ 10kHz
Non-Contact EF-Detection
|
Typical Voltage
|
Bar Graph Indication
|
|
20V (tolerance:10V~36V)
|
-
|
|
55V (tolerance: 23V ~ 83V)
|
--
|
|
1 10V (tolerance: 59V ~ 165V)
|
---
|
|
220V (tolerance: 124V ~ 330V)
|
----
|
|
440V (tolerance: > 250V)
|
-----
|
Indication: Bar graph segments & audible beep tones proportional to the field strength
Detection Frequency: 50/60Hz
Detection Antenna: Top end of the meter
Probe-Contact EF-Detection:
For more precise indication of live wires, such as distinguishing between live and
ground connections, use the Red (+) test probe for direct contact measurements.