HT instruments HT401 - Manual (Page 20)

HT401
EN - 19
6. TECHNICAL SPECIFICATIONS
6.1. TECHNICAL CHARACTERISTICS
Accuracy is indicated as [% rdg + (dgt number) * resolution] at 23°C ± 5°C,< 80%HR
DC Voltage
Range Resolution Accuracy Input impedance
Protection against
overcharge
60.00mV 0.01mV (0.08rdg+10dgt)
10M
 // < 100pF 1000VDC/ACrms
600.0mV 0.1mV
(0.08rdg+2dgt)
6.000V 0.001V
60.00V 0.01V
600.0V 0.1V
1000V 1V
AC TRMS Voltage
Range Resolution
Accuracy
(50Hz
1kHz)
Input impedance
Protection against
overcharge
60.00mV 0.01mV (1.2rdg+5dgt)
10M
 // < 100pF 1000VDC/ACrms
600.0mV 0.1mV
6.000V 0.001V
(0.8rdg+5dgt)
60.00V 0.01V
600.0V 0.1V
1000V 1V
For non-sinusoidal voltages, add the following errors depending on the crest factor (CF):
1.4 < CF < 2.0
 1%rdg to the accuracy
2.0 < CF < 2.5  2.5%rdg to the accuracy
2.5 < CF < 3.0  4.0%rdg to the accuracy
Max crest factor: 3.0 (0 ÷ 3000dgt); 2.0 (3000 ÷ 5000dgt); 1.6 (5000 ÷ 6000dgt)
PEAK HOLD feature: specified accuracy ±150dgt
AC + DC TRMS Voltage
Range Resolution
Accuracy
(50Hz
1kHz)
Input impedance
Protection against
overcharge
60.00mV 0.01mV (2.0rdg+10dgt)
10M
 // < 100pF 1000VDC/ACrms
600.0mV 0.1mV
6.000V 0.001V
(2.0rdg+5dgt)
60.00V 0.01V
600.0V 0.1V
1000V 1V
For non-sinusoidal signals, add the same errors as AC TRMS voltage
PEAK HOLD feature: specified accuracy ±150dgt
Auto-V (low impedance AC/DC voltage measurement)
Range Resolution Accuracy Input impedance
Protection against
overcharge
600.0VDC 0.1V
(0.8rdg+3dgt) about
3k

1000VDC/ACrms
1000VDC 1V
600.0VAC 0.1V
1000VAC 1V
For non-sinusoidal signals, add the same errors as AC TRMS voltage
PEAK HOLD feature: specified accuracy ±150dgt