Thurlby Thandar Instruments New PL Serie Manual Del Usuario página 14

Independent
Set the MODE switch to INDEPENDENT. The two outputs are completely independent and
electrically isolated; each can be set as described in the preceding Output Control section.
It is not possible to switch from Independent mode to Tracking with LOCK set on the Slave
output. The message
off (in Independent mode) before the Tracking modes can be used.
See also the Retained Slave Settings paragraph.
Isolated Tracking
Set the MODE switch to ISOLATED TRACKING. The two outputs remain electrically isolated but
the Voltage controls of the Master output set an identical voltage on the Slave output. The
Current controls of the Slave remain independent, including the 500mA Range and Meter
Average functions.
The electrical isolation permits the two outputs to be connected to provide, for example, tracking
voltages of opposite polarity or identical voltages connected to different system references (e.g.
digital ground and analogue ground).
The LOCK and VOLTAGE SPAN functions of the Master operate exactly as described previously
and, because the output voltage of the Slave tracks the Master, they control the Slave output
voltage as well. Note that only the output voltage of the Slave is 'locked' when the Master LOCK
is used; the current controls of the Slave, including the 500mA Range and Meter Average
functions, remain independent.
The LOCK key on the Slave output is ignored and pressing it causes the message
be shown momentarily in the Slave display as a reminder.
It is possible to switch from Tracking mode back to Independent mode with LOCK still set on the
Master. The 'Master' (right-hand output) settings stay 'locked' but the settings of the left-hand
output, are not locked.
The Voltage Span keys of the Slave have a different function in Tracking mode, see next section.
Isolated Ratio (%) Tracking
Set the MODE switch to ISOLATED TRACKING.
The instrument operates as described above for Tracking mode but the Slave voltage can be set
to a percentage (0% to 101%) of the Master voltage using the Slave Voltage controls. The ratio is
then maintained as the Master voltage is varied.
Pressing ENABLE again returns the Slave to standard Tracking mode (ENABLE lamp off).
Ratio Tracking can only be enabled or disabled with the Slave output off. If the output is on the
display will briefly show the message
not be implemented.
Whenever Ratio Tracking mode is enabled the Slave display momentarily shows
before reverting to show the actual output voltage now set.
The percentage value can be shown at any time by pressing either the V
Slave output. With either key held down the Slave display shows the percentage setting in the
90.0 Pcnt
form
required. The ratio percentage can be set prior to Ratio Tracking being enabled (ENABLE lamp
off).
The LOCK and VOLTAGE SPAN functions of the Master operate exactly as described previously.
However, with Ratio Tracking enabled, the Slave Voltage controls can still be used to adjust the
ratio percentage of the Slave voltage even though the Master voltage is locked. See also the
Retained Slave Settings paragraph.
Un loc is shown in the Slave display and LOCK must first be switched
turn oFF
and the Slave Voltage controls can be used to set the ratio percentage
Ratio Tracking is enabled by pressing the
ENABLE key in the Slave VOLTAGE SPAN
section (ENABLE lamp on)
when ENABLE is pressed and the change will
In trac
Pcnt on
or V key of the
min max
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