Nomenclature; Instrument Description; Description Of Symbols At Display; Initial Autotest - HT HT7 Bedienungsanleitung

4. NOMENCLATURE

4.1.

INSTRUMENT DESCRIPTION

4.2.

DESCRIPTION OF SYMBOLS AT DISPLAY

The following symbols can be displayed:
Symbol
DC Voltage measurement
DC
AC Voltage measurement
AC
Negative polarity on DC voltage measurement
This symbol is lighted up whenever the voltage between the probes
exceeds 50VAC/DC, even if the batteries are low or have been removed
Continuity test
Clockwise phase sequence
Counterclockwise phase sequence
Detection voltage necessary to perform measurements
Low battery indication
4.3.

INITIAL AUTOTEST

Before start any measurements perform the following checks:
 Use the instrument on a known voltage source.
 The "
" symbol is lighted up whenever the voltage between the probes exceeds
50VAC/DC, even if the batteries are low or have been removed.
 Short the L1 and L2 probes. The indicator lights, the buzzer sounds and the LEDs for
the continuity test light up. The LEDs for the low impedance test and the single-phase
voltage do not light up.
Fig. 1: Instrument description
Description
EN - 5
CAPTION:
1. L1 dynamic probe
2. L2 fixed probe
3. White LED pointer
4. LCD display
5. Continuity test LED
6. Voltage detection
LED
7. Low impedance test LED
8. Low impedance switch (L2)
9. White LED
activation key
10. Battery cover
11. Low impedance switch (L1)
12. 4mm metal
internal thread
13. Probe tip protection covers
HT7
warning
pointer
sleeves with