User manual

3
Ripple and Noise
(20MHz bandwidth):
Normal mode voltage: <0·4mVrms and 2mVp-p (15V, 30V & 60V O/Ps)
<0·6mVrms and 2mVp-p (6V O/P)
Normal mode current: <0·2mArms; <40µArms Low I range (15/30/60V O/Ps)
<0·6mArms; <100µArms Low I range (6V O/P)
Common mode current: <5µArms
Load Regulation: For any load change, measured at the terminals, using remote sense:
Voltage: <(0·01% + 2mV). Add typically 2·5mV for a 0·5V drop in the
positive output lead. Specification applies for sense lead resistance <0·5Ω.
Current: typically <(0·01% + 500µA).
Line Regulation: Voltage: <(0·01% + 2mV) for 10% line change.
Current: <(0·01% + 250µA) for 10% line change.
Temperature Coefficient: Voltage: typically <(50ppm + 0·5mV)/°C
Current: typically <(100ppm + 1mA)/°C; <(100ppm + 0·1mA)/°C Low I range.
Output Protection:
Output will withstand forward voltages of up to 20V (10V on 6V O/P) above rated
output voltage. Reverse protection by diode clamp for currents up to 3A.
OTP Protection: Output trips off for over-temperature.
OVP and OCP
Protection:
(PL-P models only)
Measure-and-compare over-voltage and over-current protection are
implemented in firmware and can be set via the remote interfaces only.
Output trips off for OVP and OCP. Setting resolution: 10mV and 1mA.
Response time: typically 500ms.
For manual operation (Local mode) OVP and OCP are fixed at 105% of the
instrument range maximum.
METER SPECIFICATIONS
Display Type:
Dual 4-digit meters, 10mm (0·39") LED.
Voltage: Resolution 10mV, 15/30/60V O/Ps; 1mV, 6V O/P.
Accuracy ±(0·1% +10mV) 6/15/30/60V O/Ps.
Current: Resolution 1mA; 0·1mA Low I range.
Accuracy ± (0·3% + 3mA) to 3A, ± (0·5% + 3mA) to 6A;
± (0·3% + 3mA) to 8A, ± (0·3% + 0·3mA) on Low I range, 6V
O/P.
Current Meter Average: Selects a 2s time constant (normally 20ms) for averaging of rapidly varying
load currents.
ADDITIONAL SPECIFICATIONS - PL303QMD/PL303QMT QUAD-MODE DUAL Section
Independent Mode: Each output is fully independent and isolated. Operation is equivalent to
two single power supplies.
Tracking Mode:
Tracking Accuracy:
The two outputs remain isolated but the Slave voltage controls are
disabled and the Slave voltage is set equal to the Master voltage.
Slave voltage = Master voltage ±(0.1% of Master voltage ±10mV).
Ratio (%) Tracking Mode:
Tracking Accuracy:
As tracking but the Slave voltage controls set an output voltage between
0% and 101% of the Master voltage. Once set, varying the Master voltage
will create the same percentage change in the Slave voltage setting.
% change in Slave voltage = % change of Master voltage ± 0.1% ±10mV.
Parallel Mode: The Master output operates as a single output power supply with twice
the current capability (0.2mA to 6A). The Slave is disabled (and its
displays are turned off).
Both On / Both Off: Each output has an independent DC On/Off control; these additional keys
can be used to turn both outputs on or off simultaneously. These keys
operate in all four modes.