24
POWER
ON
OFF
AC VOLTAGE
SOURCE
50000 Count Multimeter
TH1942
！
CAT
Ⅰ
(
1000V
)
CAT
Ⅱ(
300V
)
Ω
COM
20A
T1AL 250V
ALL INPUT
1KV MAX
500mA
MAX
V
1000V
MAX
DC I
AC I
Period
dB
dBm
%
Comp
Hold
Menu
Local
2nd
DC V
AC V
Ω
Freq
AC+DC
Rel
Rate
Esc
Shift
Trig
Auto
mA
MED
AUTO
Period Measurement
Input Impedance =1.1
MΩ
in parallel with 100pF
CAUTION: Maximum Input = 750V RMS or 1000V peak, 3
×
10
7
V-Hz
Figure 3-4 Frequency and Period Measurements
3.6 Measuring Continuity
Under continuity test, when 200
Ω
range is selected, the multimeter alerts you with a beep when a
reading is below a threshold resistance level of 10
Ω
. For other ranges, the beeper will sound if a reading
is below a threshold resistance level listed in table 3-1.
Table 3-1 Threshold resistance levels in Continuity Test
Measuring range
Beeper on
5
00.00Ω
<10Ω
5
.0000KΩ
<100Ω
5
0.000KΩ
<1kΩ
5
00.00KΩ
<10kΩ
5
.0000MΩ
<100kΩ
5
0.000MΩ
<1MΩ
3.6.1 Connections
Assuming Model TH1942 is under factory default conditions, the basic procedure is as follows:
1. Connect test leads to
and COM terminals.
2. Select Continuity measurement function by pressing
→
.
3. Connect test leads to the resistance under test as shown in Figure 3-5.
4. Take a reading from the display
