Tonghui TH2840 Series - Introduction to Rear Panel; Rear Panel Description 1

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NOTE: TH2840A and TH2840B have no transformer secondary measuring terminal.
22) [File] key
This key is used to enter into FILE MANAGE interface quickly.
23) [Enter] key
[Enter] key is used to terminate data input, confirm and save the data displayed in the input
line.
24) [Cal] key
User calibration execution shortcut keys.
25) [Home] key
The [Home] key is used to switch between different functions such as electric bridge,
transformer single-group test, and transformer scan.
26) POWER
Power switch. The instrument is red in the standby state and green in the power-on state. To
shut down, you need to press and hold the power switch.
27) [DC Bias] key
[DC Bias] key is used to allow or prohibit the output of 0-100mA, ±40V, 0-2A DC bias source.
Press the [DC Bias] key, the [DC Bias] key will be lit, indicating that the DC bias output is
allowed; press the [DC Bias] key again, the [DC Bias] key will go out, indicating that the DC
bias output is prohibited. In some non-test screens where DC Bias cannot be added, pressing
this button will have no response.
28) [LOCK] key
Press the [LOCK] key, the [LOCK] key will be lit, indicating that the key functions of the
current panel are locked; press the [LOCK] key again, the [LOCK] key will be off, indicating
that the keyboard lock state is released. If the password function is set to "ON", the correct
password must be entered when unlocking the keyboard, otherwise the keyboard lock cannot
be unlocked.
When the instrument is controlled by RS232, USB_Device, Lan port, etc., the [LOCK] button
will be lit. Press the [LOCK] key again, the [LOCK] key will go out, indicating that it returns
to the local unlocked state of the keyboard.
2.2 Introduction to rear panel
The rear panels of different models of TH2840 series are different. The detailed description of the
rear panel layout of TH2840A, TH2840B, TH2840AX, TH2840BX will be introduced in 2.2.1 and
the detailed description of the rear panel layout of TH2840NX will be introduced in 2.2.2.
2.2.1 Rear panel description 1
Figure 2-2 briefly describes the rear panel of TH2840A, TH2840B, TH2840AX, and TH2840BX.