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What do Voltage On Set and Voltage Off Set functions do in the 85XX series DC load?

Last Updated: May 01, 2014 03:24PM PDT
Applicable Models:  8500, 8502, 8510, 8512, 8514, 8518, 8520, 8522, 8524, 8526
Applicable Firmware:  1.84

Q:  What do Voltage On Set and Voltage Off Set functions do in the 85XX series DC load?

A:

Voltage On Set

Default: 0.00 V

When Voltage On Set is configured, the input of the load will not be active, even if the terminals are turned on with On/Off button, unless a voltage measured at the input terminals by the load are higher than the voltage level set under Voltage On Set from within the load System Set menu.

For example, if Voltage On Set is 5.00 V, upon turning on the inputs, the load will not draw any power from the connected source until the voltage hits above 5.00 V.  When it is below 5.00 V, the load will draw nothing even when the inputs are turned on.

Voltage Off Set

Default: 0.00 V

When Voltage Off set is configured, the input of the load will stay active when Voltage On Set conditions are met.  This feature applies only when the voltage has been set to a value above the value set for Voltage Off Set.  Then, as the value decrease down to the Voltage Off Set value, the load will stop sinking power even when the input terminal is remained On.

For example, suppose Voltage Off Set is 20.00 V and Voltage On Set is 2.00 V and the input terminals are turned On.  If measured voltage at the input is above 2.00 V, it will be sinking power.  When the input measured voltage is above 20.00 V, the Voltage Off Set function will start off.  At this time, the load will continue to draw power at any voltages above 20.00 V.  But as the measured voltage goes back down to 20.00 V or below, the load will immediately cut off drawing power from the connected device even with the input turned On.  In order to reset this so that the load will draw power again at voltages below 20.00 V, user must toggle the input On/Off control once (turn it off and on again).

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