Tonghui TH2840 Series - Level Monitor Function

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The corresponding options and input ranges are as follows:
Bias Source
Bias Type
Input Range
Internal 100mA
(Voltage, current, internal
resistance are related to Ohm's
law)
Voltage
-40V~40V
Current
-100mA~100mA
Internal 2A
Current
0~2A
External TH1778
Current
0~120A
Determined by
external bias current
source
3.4.6.2 Bias Type
In the case of using the internal bias source of 100mA, the bias current mode or the bias voltage
mode can be selected, and the maximum setting size is restricted by the relationship of the internal
resistance.
Parameter setting attribute: numeric input.
Provides a built-in DC bias voltage ranging from -40V to +40V.
Press the [DC Bias] key on the front panel to allow the set DC bias output. When the DC bias output
is allowed, the [DC Bias] button will be lit.
3.4.6.3 DCI isolation
Parameter setting attributes: enumerated type.
The bias current isolation function can prevent the influence of DC current on the test input circuit.
The ISO domain can set the bias current isolation function ON or OFF.
In the single measurement page (measurement display), the switch control of ISO is determined by
the user's settings. In the list sweep and trace sweep test functions, when the current is above a
certain level, it is automatically controlled by the set current.
Note: After the bias current isolation function is turned on, it will affect the test accuracy. Therefore,
when testing high-impedance components under low frequency and small bias current conditions,
the bias current isolation function should be set to OFF.
3.4.6.4 Bias polarity
3.4.7 Level monitor function
Parameter setting attributes: enumerated type.
The level monitoring function allows you to monitor the actual voltage across the DUT or the actual
voltage and current values flowing through the DUT.
The voltage monitoring value is displayed in the Vm monitoring field on the <Meas Disp> page;