Tonghui TH2840 Series - Range; DC Bias

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Integration time (A/D conversion);
Average times (the number of times used to obtain the average value of the continuous measurement
results);
Measurement delay (the time from start to start of measurement);
Display time of measurement results;
Generally speaking, when measuring slowly, the test result is more stable and accurate.
You can choose FAST+, FAST, MED and SLOW 4 test speeds. See the description in section 8.1.9
for details.
3.4.5 Range
The range is divided into AC range and DC range. The AC range is used to test AC LCR parameters,
and the DC range is used to test DC resistance.
Parameter setting attributes: enumerated type.
The test range is selected according to the impedance value of the LCR component under test.
AC test range: 0.1Ω, 1Ω, 10Ω, 20Ω, 50Ω, 100Ω, 200Ω, 500Ω, 1kΩ, 2kΩ, 5kΩ, 10kΩ, 20kΩ, 50kΩ,
100kΩ.
DC test range: 0.1Ω, 1Ω, 10Ω, 20Ω, 50Ω, 100Ω, 200Ω, 500Ω, 1kΩ, 2kΩ, 5kΩ, 10kΩ, 20kΩ, 50kΩ,
100kΩ.
Operation steps for setting test range:
Use the cursor keys to move the cursor to the Range field. The screen will display the following soft
keys.
Auto
This softkey is used to set the range to AUTO (automatic) mode.
Hold
This softkey is used to switch the range from AUTO mode to HOLD mode. When the range is set to
HOLD (hold) mode, the range will be locked in the current test range. The current test range will be
displayed in the range field of the screen.
Increase +
This soft key is used to increase the range in the HOLD mode.
Decrease-
This softkey is used to decrease the range in HOLD mode.
Use the soft keys to set the test range.
3.4.6 DC Bias
Parameter setting attribute: numeric input.
It involves the selection of bias source and bias type, digital size range setting and other related
settings.
3.4.6.1 Bias Source
This series comes standard with two types of internal bias sources or external biases for selection.