HT instruments HT401 - Manual (Page 21)

HT401
EN - 20
DC Current
Range Resolution Accuracy Measuring time
Protection against
overcharge
60.00mA 0.01mA
(0.8rdg+3dgt)
3min (A)
10min (mA)
max 440mA (mA)
max 11A (A)
600.0mA 0.1mA
6.000A 0.001A
10.00A 0.01A
AC TRMS Current
Range Resolution
Accuracy
(50Hz
1kHz)
Measuring time
Protection against
overcharge
60.00mA 0.01mA
(1.2rdg+3dgt)
3min (A)
10min (mA)
max 440mA (mA)
max 11A (A)
600.0mA 0.1mA
6.000A 0.001A
10.00A 0.01A
For non-sinusoidal currents, add the same errors as AC TRMS voltage
PEAK HOLD feature: specified accuracy ±150dgt
AC + DC TRMS Current
Range Resolution
Accuracy
(50Hz
1kHz)
Measuring time
Protection against
overcharge
60.00mA 0.01mA
(2.0rdg+5dgt)
3min (A)
10min (mA)
max 440mA (mA)
max 11A (A)
600.0mA 0.1mA
6.000A 0.001A
10.00A 0.01A
For non-sinusoidal signals, add the same errors as AC TRMS voltage
PEAK HOLD feature: specified accuracy ±150dgt
Frequency
Range Resolution Accuracy
Minimum
frequency
Protection against
overcharge
100.00Hz 0.01Hz
(0.1rdg+2dgt)
1Hz 1000VDC/ACrms
1000.0Hz 0.1Hz
10.000kHz 0.001kHz
100.00KHz 0.01KHz
Sensitivity: > > 5.0Vpp (VAC 1Hz ~ 10kHz); > 10Vpp ( VAC 10kHz ~ 100kHz); > 2mApp (ACmA); > 0.2App (ACA)
Resistance
Range Resolution Accuracy (*)
Maximum open
circuit voltage
Protection against
overcharge
600.0
 0.1 (0.8rdg+5dgt)
2.5V
(600
 and 6k)
1000VDC/ACrms
6.000k
 0.001k
(0.8rdg+2dgt)
60.00k
 0.01k
0.6V
(other ranges)
600.0k
 0.1k
6.000M
 0.001M
40.00M
 (*)
0.01M
 (1.0rdg+5dgt)
Test current : approx. 0.1mA
(*) Specified for measurements 1 hour after Auto-V test. Add 10dgt for measurements before this interval
(**) Small instability < ± 50dgt for measurements >10 M

Diode test
Range Resolution Accuracy
Test
current
Open
circuit
voltage
Protection against
overcharge
2.000V 1mV
(1.5rdg+2dgt) < 0.4mA
<2.5V 1000VDC/ACrms