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General specifications apply for the temperature range 5°C to 40°C. Accuracy specifications apply
for the temperature range 18°C to 28°C after 1 hour warm-up with no load and calibration at 23°C.
Typical specifications are determined by design and are not guaranteed.
OUTPUTS
Voltage/Current Ranges:
PLH120
PLH250
Note: In manual operation, actual maxima for voltage and current are typically 1% greater than the
figures given above, with the exception that the PLH250 cannot be set above 250.0V.
Voltage Setting:
Current Setting:
Voltage Span Control
(V-Span)
Settings Lock
(S-Lock)
Output Mode:
Output Switch:
Output Terminals:
Transient Response:
Voltage Programming
Speed (PLH-P models):
Range and Setting
120V 750mA
120V 75mA
250V 375mA
250V 75mA
Note: The above times are examples. The settling time for a particular voltage change is determined
by the current available to charge the internal output capacitance (22
For large voltage steps and low current limit settings the settling times can be significantly longer.
Ripple and Noise*
(20MHz bandwidth):
*Specification applies for manual and digital interface operation only. Under analogue remote control
noise is a little worse but will typically still meet the limits given.
2
0V to 120V/0.1mA to 750mA; 0V to 120V/0.01mA to 75mA
0V to 250V/0.1mA to 375mA; 0V to 250V/0.01mA to 75mA
By coarse and fine controls.
By single logarithmic control.
The voltage adjustment range can be controlled by digital setting of the
end-stop values of the coarse voltage control to any desired values.
The range for Vmax is 0.1V to 120V/250V depending on model.
The range for Vmin is 0 to (Vmax – 0.1V).
Voltage and current settings can be locked by a single button press.
Lock accuracy is equal to meter accuracy (see Meter Specification)
Constant voltage or constant current with automatic cross-over.
CC indicator lit in constant current mode.
Electronic, non-isolating.
Preset voltage and current limit displayed when Output is off.
Output rise time with no load <20ms.
Front panel: Universal 4mm safety binding posts on 19mm (0·75") spacing
for Output; screwless terminals for Sense.
Rear Panel: (PLH-P only) Screwless terminals for Output; no Sense.
<250µs to within 50mV of set level for a 5% to 95% load change.
Maximum time required for output to settle within 1% of its total excursion
(resistive load). Excludes command processing time.
90% Load
Up
35ms
Up
100ms
Up
100ms
Up
225ms
Normal mode voltage: <2mVrms and 10mVp-p
Normal mode current: <10µArms; <1µArms on 75mA range.
Common mode current: <20µArms
No Load
30ms
Down
40ms
Down
75ms
Down
80ms
Down
µ
Specification
90% Load
No Load
70ms
250ms
200ms
600ms
F) plus any load capacitance.
400ms
400ms
1200ms
1200ms
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