Initial Autotest; Dc Voltage Measurement - Ht Instruments Ht10 Bedienungsanleitung

5.1. INITIAL AUTOTEST

Before starting any measurement perform the following checks
•
Use the instrument on a known voltage source
•
The "
50VAC/120VDC is applied, even if the battery is low
or has been removed
•
Before and after the use of instrument short the L1
and L2 probes for approx. 4-6s. The below actions
must be noted:
➢ All the LEDs except low impedance test switch on
➢ The audible signal will sound
➢ All segments of display and backlight switch on

5.2. DC VOLTAGE MEASUREMENT

•
The maximum input for DC Voltage is 1000V. Do not
measure higher voltages to avoid risks of electrical
shocks or serious damages to the instrument
•
Warning LED turns ON and the buzzer sound for
voltage between probes over 120V
1. Perform the preliminary Autotest function (see § 5.1)
2. Connect the L1 and L2 probes to the object under test (see Fig.
4). The measurement is performed only with contact of probes
directly on metal parts of conductors
3. The instrument switches on automatically for voltage >6V and
the DC voltage value is displayed both through red LEDs
switching on and on the display. DC symbol is displayed and "+"
LED switches on
4. Should symbol "-" be displayed it means that the detected
voltage has an opposite direction compared to the connection
shown in Fig. 4
5. The instrument turns automatically OFF as soon as probes are
disconnected from the object under test
6. Press the H/ key to activate/deactivate the function HOLD at
display. Press
activate/deactivate the display backlight
7. Press the / key to activate/deactivate the white LED torch
30
CAUTION
" LED switches on when a voltage above
CAUTION
and hold the H/
HT10
key in order to