HT instruments HT21 - Manual (Page 15)

HT21
EN - 14
6. TECHNICAL SPECIFICATIONS
6.1. TECHNICAL FEATURES
The accuracy is calculated as [%reading + (number of digits)*resolution]. It is referred to
the following environmental conditions: temperature 18°C
28°C (64°F82°F), <70%RH
DC Voltage (Autorange)
Range Resolution Accuracy Input impedance Overload protection
4.000V 0.001V
(1.2%rdg+2dgt)
7.8M

600VDC/ACrms
40.00V 0.01V
400.0V 0.1V
600V 1V
(1.5%rdg+2dgt)
AC Voltage (Autorange except for 400mV range)
Range Resolution
Accuracy
(50
 400Hz)
Input impedance Overload protection
4.000V 0.001V
(1.2%rdg+4dgt)
7.8M

600VDC/ACrms
40.00V 0.01V (1.5%rdg+3dgt)
400.0V 0.1V
600V 1V
(2.0%rdg+4dgt)
Frequency range: 50Hz
400Hz
Resistance (Autorange)
Range Resolution Accuracy Overload protection
400.0
 0.1 (1.2%rdg + 4dgt)
250VDC/ACrms
4.000k
 0.001k (1.0%rdg + 2dgt)
40.00k
 0.01k
(1.2%rdg + 2dgt)
400.0k
 0.1k
4.000M
 0.001M
40.00M
 0.01M (2.0%rdg + 3dgt)
Diode Test
Feature Resolution Accuracy Max open voltage Overload protection
1mV
(10%rdg + 5dgt)
circa 1.5VDC 250VDC/ACrms
Continuity test
Feature Buzzer Test current Overload protection
<150

<0.3mA 250VDC/ACrms
Frequency (Autorange)
Range Resolution Accuracy Sensitivity Overload protection
5.000Hz 0.001Hz (1.5%rdg + 5dgt)
>8Vrms 250VDC/ACrms
50.00Hz 0.01Hz
500.0Hz 0.1Hz
(1.2%rdg + 3dgt)
5.000kHz 10Hz
50.00kHz 10Hz
500.0kHz 100Hz
5.000MHz 1kHz
(1.5%rdg + 4dgt)
10.00MHz 10kHz