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7.6 Setting the Voltage/Current Range
Range
Each output has more than one range. For outputs 1 and 2 the choices are 30V/6A, 15V/10A
or 60V/3A. For output 3 the choice is 5.5V/3A or 12V/1.5A.
Additionally output 1 has 4 further ranges that provide up to 360 watts from a single output as
30V/12A, 15V/20A, 60V/6A or 120V/3A. With these ranges selected, output 2 is disabled.
Pressing the Range soft key brings up
a menu screen which shows the
currently selected range by illumination
of the soft key. Pressing another key
selects a new range which is actioned
when OK/Exit is pressed.
For output 1, the four additional ranges are selected by pressing the More key. For the 120V
range only, a flashing HV lightning symbol will appear when a voltage above 60V is set.
Note that a change of range can only be made when the output is off. If the output is on, a
message will prompt the user to turn it off. Note, however, that it is still possible that a range
change on output 1 may fail to complete because certain range changes require that the
residual voltages on the output
1 and output 2 terminals are <0.5V before the range can be
changed. If after 5 seconds this condition has not been met a warning screen is displayed.
From this screen it is possible to retry, change the range, cancel the request, or set defaults
and restart the instrument.
7.7 Selecting Voltage Tracking
By default all outputs are completely independent. However, it is possible to make the voltage
of output 2 always equal to the voltage set on output 1. This is called voltage tracking.
Tracking voltages can be useful in
setting up adjustable voltages of equal
or opposite polarity, or when outputs
are wired in parallel or in series.
Voltage Tracking can be turned on or
off from the Range menu of the output 2 screen. Alternatively it can be selected from the
System Menu, see section 9.1.
Voltage Tracking can only be selected when the O/P2 voltage range is equal to, or greater than,
the O/P1 voltage range.
7.8 Store and Recall of Settings
Stores
Each output has 50 memory stores
capable of storing range, voltage,
current, OVP and OCP. Pressing the
Stores soft key brings up a menu
screen which shows the present
contents of the memories from which
settings can be stored or recalled.
The memories are numbered from 00
to 49 with the currently selected line
highlighted. The location can be
scrolled using the spin wheel or stepped through using the arrow keys. It is also possible to
