Elma Instruments Auto-Check 117, User Manual

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Elma 117 - 118 Page 55
Electrical Specifications
ACCURACY IS ±(% READING NUMBER OF DIGITS) OR OTHERWISE SPECIFIED,
AT 23
O
C ±5
O
C & LESS THAN 75% R.H.
TRUE RMS MODEL BM118 ACV & ACA CLAMP-ON ACCURACIES ARE SPECIFIED FROM
5% TO 100% OF RANGE OR OTHERWISE SPECIFIED. MAXIMUM CREST FACTOR ARE AS
SPECIFIED BELOW, AND WITH FREQUENCY SPECTRUMS, BESIDES FUNDAMENTALS,
FALL WITHIN THE METER SPECIFIED AC BANDWIDTH FOR NON-SINUSOIDAL
WAVEFORMS.
DC Voltage
RANGE ACCURACY
6.000V 0.5%
+ 3D
60.00V 1.0% + 5D
600.0V 2.0% + 5D
NMRR : >30DB @ 50/60HZ
CMRR : >100DB @ DC, 50/60HZ, RS=1K
Ω
HI-Z DCV INPUT IMPEDANCE:
5M
Ω
, 90PF NOMINAL
AutoCheck
TM
Lo-Z DCV input impedance:
Initially 1.6k
Ω
, 90pF nominal;
Impedance increases significantly as display voltage increases from 50V (typical). Typical
impedances vs display voltages for reference are:
15k
Ω
@ 100V
100k
Ω
@ 300V
210k
Ω
@ 600V
AutoCheck
TM
DCV Threshold:
> +1.5VDC or < -1.0VDC nominal
DIODE TESTER
Open Circuit Voltage
Test Current
< 1.6 VDC 0.4MA (TYPICAL)
Audible Threshold: between 0.015V and 0.080V
Ohms
RANGE ACCURACY
1)
6.000K
Ω
2)
1.2% + 6D
3)
60.00K
Ω
, 600.0K
Ω
1.0% + 4D
6.000M
Ω 2.0% + 4D
OPEN CIRCUIT VOLTAGE : 0.4VDC TYPICAL
1)
COOL DOWN INTERVAL 2 MINUTES AFTER OVER 50V MEASUREMENTS IN AUTO-V
Ω
POSITION
2)
BEEPER ON WHILE READING < 0.025K
Ω
3)
ADD 40D TO SPECIFIED ACCURACY WHILE READING IS BELOW 20% OF RANGE