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displayed (SET lamp is off) and the power supply is in operate mode rotating the current encoder
will change the least significant digit of the current setting. The affects of the change will be seen
by changes in the meter value as the output changes.
6.8. Setting Adjustment and Regulation Modes
The LT SERIES DC rectifier can be set to current, voltage or crossover regulation.
Current/voltage limits can be set with the front panel controls. The following procedures outline
the necessary steps:
NOTE:
Make sure the unit is in local mode. The RMT indicator should be off. If it is on, press the
RMT / LCL button to turn it off.
6.8.1. Setting Adjustment (while viewing the setting)
The voltage and current settings are adjusted from the meters run screen by using the associated
encoder as described in
6.7.Current and Voltage Settings.
From operate or standby mode
pushing an encoder switch will display the associated set
ting (the ‘SET’ lamp blinks on and off). If
the setting can be changed, the active digit will flash. Turning the encoder will adjust the flashing
digit. Each press of the encoder switch will advance the active digit by one digit to the left. When
no more adjustments are made after a short period the display will automatically change back to
the appropriate meter value and the ‘SET’ lamp turns off.
6.8.2. Setting Adjustment (while viewing the output value)
From operate mode minor adjustments to the output of the power supply can be made while
viewing the voltage or current meter values (setting is not displayed). While in operate mode
turning the appropriate encoder (without pushing the encoder switch) will make minor adjustments
to the power supply output (the lowest setting digit is being adjusted). The change in output will
be reflected on the associated meter. Note that adjustments made in this manner will affect the
setting even though the setting is not displayed.
6.8.3. Current Regulation
1. Set the VOLTAGE setting to its maximum value using the voltage encoder (the maximum
value will be the rating of the supply).
NOTE:
The fastest way to adjust a setting to maximum or minimum is to press the encoder
button until the left-most digit is flashing and then turn the encoder.
2. Set the CURRENT setting to the desired value using the current encoder.
3. When regulating current, if the current reaches the supply current rating level the supply
will change to voltage regulation to keep the current from going over its rating.
6.8.4. Voltage Regulation
1. Set the CURRENT setting to its maximum value using the current encoder (the maximum
value will be the rating of the supply).
2. Set the VOLTAGE setting to the desired value using the voltage encoder.
3. When regulating voltage, if the voltage reaches the supply voltage rating level the supply
will change to current regulation to keep the voltage from going over its rating.