Amprobe PM55A Automatic-Precision-Pocket-Meter - Manual (Page 14)

12
precautions to avoid misleading results when making measurements in the presence of electronic
interference.
Accessories
H-PM protective holster, VC3 soft carrying pouch, battery installed, and User’s manual
Electrical Specifications
(Accuracy @ 23
°C ± 5 °C and < 75% R.H.)
RF Field @ 3 V/m: Specified accuracy + 45 d (Capacitance not specified)
DC Voltage
Range Accuracy
6.000 V
±(0.5%+3 dgt)
60.00 V
±(1.0%+5 dgt)
450.0 V
±(1.2%+5 dgt)
Input Impedance:
AutoTect
 Lo-Z V dc: 833 kΩ (4.2 kΩ when displaying AUTO),
90 pF nominal
MRR: > 30dB @ 50 Hz/60 Hz
CMRR: > 100dB @ DC, 50 Hz/60 Hz; Rs=1 k
Ω
V dc AutoTect
 Threshold:
> +1.2 V dc or < -0.6 V dc nominal
Hi-Z V dc only
AC Voltage
Range Accuracy
50 Hz – 60 Hz
6.000 V, 60.00 V, 450.0 V, 600 V
±(1.5%+5 dgt)
CMRR: > 60 dB @ dc to 60 Hz, Rs=1 k
Ω
Input Impedance: AutoTect

Lo-Z V ac: 160 k
Ω, 160 pF nominal
Hi-Z ACV: 5 M
Ω, 90pF nominal
ACV AutoTect

Threshold: > 1.5 V ac (50 Hz/60 Hz) nominal