Tonghui TH2840 Series - Function Check; Test Signal Level; Frequency; Measurement Accuracy

129
10Ω
100Ω
1kΩ
10kΩ
100kΩ
4
Standard inductor
100μH
0.02%
1mH
10mH
100mH
5
Frequency counter
（0～1000）MHz
6
Digital Multimeter
0.5％
7
Insulation resistance meter
500V 10 levels
8
Hipot Tester
0.25kW
（0～500）V
8.6.3 Function check
Ensure function keys, displayer and terminal etc. can work normally.
8.6.4 Test signal level
Adjust multimeter in AC voltage range, where one test cable is connected to H
CUR
and the other is
connected to ground terminal. Change level as: 10mV, 20mV, 100mV, 200mV, 1V, 2V, 10V or 20V,
the reading should meet the demand of test signal level in this chapter.
8.6.5 Frequency
Connect frequency meter to ground terminal. The test terminal of the frequency meter is connected
with H
CUR.
Change the frequency as: 20Hz, 100Hz, 1kHz, 10kHz, 100kHz, 200kHz, 500 kHz,
1MHz, 2Mhz. The reading of frequency meter should meet the demand of the test signal frequency
in this chapter.
8.6.6 Measurement accuracy
Basic parameters are R, L, C and D, so measurement accuracy is mainly about R, L, C and D.
8.6.7 Accuracy of C and D
Test condition:
Function C
p
-D
Test frequency 100Hz 1kHz 10kHz 100kHz Test respectively
Level 1V