Elma BM 251s-257s
side 49
DC Voltage
RANGE
Accuracy
60,00mV
0,4%+5d
600.0mV
0.2%+3d
6.000V, 60.00V, 600.0V, 1000V
NMRR: > 60dB @ 50Hz/60Hz
CMRR: > 100dB @ DC, 50Hz/60Hz; Rs=1k
Input Impedance: 10M
, 50 pF nominal
AutoCheck
TM
_DCV (BM257s only)
RANGE
Accuracy
1.000V ~ 1000V
1.3% + 3d
AutoCheck
TM
Lo-Z DCV Threshold:
> +1.0VDC & < -1.0VDC nominal
AutoCheck
TM
Lo-Z DCV Input Impedance:
Initially approx. 2.5k
, 120pF 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:
15k
@100V
100k
@300V
250k
@600V
375k
@1000V
AutoCheck
TM
_Ohm (BM257s only)
RANGE
1)
Accuracy
00.00
~ 60.00M
1.2% + 10d
Open Circuit Voltage: 0.45VDC typical
1)
AutoCheck
TM
Ohm Threshold:
< 10.00M
nominal
CREST Mode ( BM257s only)
Accuracy: Specified accuracy plus 150 digits for changes > 5ms in duration
RECORD Mode (BM257s only)
Accuracy: Specified accuracy plus 100 digits for changes > 100ms in duration
Capacitance (BM257s only)
RANGE
Accuracy
60.00nF, 600.0nF
2.0%+5d
6.000
F, 60.00
F, 600.0
F
1.5%+5d
3000
F
2.0%+5d
Accuracies with film capacitor or better
