Keithley DC Load SOP

Here is the layout for the front panel:

Power on/off switch

Navigation Control

Function Keys

Numeric Keypad, Esc Key, Combination Buttons

Navigation Arrow Keys, Enter, Trigger, On/Off Button

Input Terminals

The Shift key allows access to secondary functions (similar to how shift works on an ordinary computer)

The Local key sets the instrument back to local usage (Used if the instrument is connected to a remote device to switch back to inputs directly from the device)

The Recall key loads previously stored instrument settings

The CC key sets the load to Constant Current (CC) mode and configures the current value

The CV key sets the load to Constant Voltage (CV) mode and configures the voltage value

The CR key sets the load to Constant Resistance (CR) mode and configures the resistance value

The CP key sets the load to Constant Power (CP) mode and configures the power value

Under CC mode, the electronic load consumes constant current regardless of whether the input voltage changes or not.

You can set the constant current by one of the following ways:

Turn the navigation control to set the constant current.

Use numeric keys to input the current value and press Enter to confirm the setting.

Use the arrow keys to adjust the value.

The voltage and current limits and the maximum current change speed can be changed by pressing Shift + CV when in CC mode. They have a maximum of 120V, 60A, and 5A/μS.

Under CV mode, the load consumes sufficient current to maintain the input voltage at the constant setting voltage

You can change the constant voltage by one of the following ways:

Turn the navigation control to set the constant voltage

Use numeric keys to input the voltage value and press Enter to confirm the setting

Use the arrow keys to adjust the value

The voltage and current limits can be changed by pressing Shift + CV when in CV mode. They have a maximum of 120V and 66A, but do not set the current limit above 60A

You can set the constant resistance by one of the following ways:

Turn the navigation control to set the constant resistance.

Use numeric keys to input the value and press Enter to confirm the setting.

Use the arrow keys to adjust the value.

The voltage and resistance limits can be changed by pressing Shift + CV when in CR mode. They have a maximum of 120V and 7500Ω.

The DC load's internal resistance is roughly 20Ω

You can set the constant power by one of the following ways:

Turn the navigation control to set the constant power.

Use numeric keys to input the value and press Enter to confirm the setting.

Use the arrow keys to adjust the value.

The voltage and power limits can be changed by pressing Shift + CV when in CR mode. They have a maximum of 120V and 250W.

You can control the input of the electronic load by pressing On/Off on the front panel. If the On/Off key is lit up, the input is on, and the OFF indicator on the display will disappear. If the On/Off key is off, the OFF indicator on the display will appear.

You can press Shift + On/Off to lock the keypad and the display. All keys with the exception of the On/Off, Shift + 7 (Info), up and down arrow keys, and Esc will be disabled. Press Shift + On/Off again to unlock the DC load.

The electronic load can also analog a short circuit. Press Shift + 1 to switch to short circuit mode. The short circuit mode does not influence the existing settings. In the short circuit mode, the current value is determined by the operation mode and the current range.