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Functions and Features

• Before connecting the hardware device that controls the analog in-

terface, make sure that the hardware device does not output a volt-

age higher than 20% of the specified value to the pin, otherwise the

instrument will be damaged. For example, when setting the voltage

or current, the input voltage can’t exceed 12V, otherwise the instru-

ment will be damaged.

• In analog remote control mode, the analog signal input pin cannot

be left floating. Before enabling the external analog function, verify

that pin 1 (Vol_Pro) and pin 15 (Cur_Pro) are connected correctly. If

the set value does not need to be adjusted, it can be fixed to a de-

fined level, or directly connected to pin 18 (Vref), and the set value

is directly set to the maximum rated value.

• Safe electrical isolation is set between this analog interface and

output electrode. Do not connect any ground wire of the analog in-

terface to the positive and negative terminals of the output

interface.

Enable/Disable Analog Control

To run this function, the power supply must be in the control of external analog

control mode. The operation steps to set this menu item are as follows.

1. Press [Shift]+[Display] (System) keys to enter into the system menu.

2. Use left and right keys or rotate the knob to select Comm and press [Enter].

3. Use left and right keys or rotate the knob to select Ext-program and press

[Enter].

This menu is only displayed if the user has installed the analog interface.

If there is no analog interface, this menu item is not displayed.

4. Rotate the knob to adjust the value.

• Off: default value, indicates disable this function.

• On: indicates enable this function. Before enabling the external analog

function, verify that pin 1 (Vol_Pro) and pin 15 (Cur_Pro) are connected

correctly.

5. After finishing the setting, press [Enter] key to confirm.

ITech IT-M3131D User Manual

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