Operation; Output Setting; Connection To The Load - TTI TSX Serie Manual De Instrucciones

Output Setting

With the POWER switch on (
and current limit can be accurately set using the three output controls; the left-hand meter
indicates set voltage and the right-hand meter set current.
When the OUTPUT is switched on, the ON LED and the CV (constant voltage) LED will light; the
left-hand meter continues to show the set voltage but the right-hand meter now shows actual
current drawn. Alternate presses of the I METER DAMPING button will switch current meter
damping in and out; with damping switched in the DAMPED LED will be lit and the average value
of a varying load current will be read.
If the output goes into current limit the CI (constant current) LED will light instead of the CV LED
and the left-hand meter will now show the actual voltage at the output terminals; the right-hand
meter will continue to show the set current limit.
At any time, the set voltage and set current levels can be reviewed by pressing the CHECK V/I
button.
Outputs from several supplies may be connected in series or parallel to produce higher voltages
or higher currents respectively. Care must be taken when connecting supplies in series to ensure
that the maximum voltage rating of any output terminal (300V peak maximum with respect to true
ground) is not exceeded.

Connection to the Load

Connection to the front panel output terminals can be made with 4mm plugs, spade terminals or
wire ends. To minimise voltage drop, the connecting leads to the load should be of an adequate
wire gauge and be kept short. Load wires should also be twisted together to minimise
inductance.
To overcome errors introduced by connecting lead resistance at higher currents the remote
sensing facility should be used (10 mΩ of lead resistance will drop 0.2 Volt at 20 Amps). Remove
the two shorting links made between the rear output and sense terminals and connect the sense
terminals directly to the load; the power connections may be made from either the front or the
rear terminals.
To ensure good coupling between the output and sense, the sense wires should be twisted with
their corresponding output leads before the output leads are twisted together.
The voltage drop in each output lead must not exceed 1 Volt.
The shorting links should be re-made between the rear sense and output terminals when remote
sensing is not being used. However, the sense connection is also made internally through a low
value resistor and only a small error between the set and actual voltage will result if the links are
left disconnected.
The output is fully floating and either terminal can be connected to ground or raised by up to
300V peak above true ground; however, such voltages are hazardous and great care should be
taken.
The current limit control can be set to limit the continuous output current to levels down to 10mA.
However, in common with all precision bench power supplies, a capacitor is connected across the
output to maintain stability and good transient response. This capacitor charges to the output
voltage, and short circuiting of the output will produce a short current pulse as the capacitor
discharges which is independent of the current limit setting.
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) and the OUTPUT push-button switch off (out) the output voltage

Operation

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