| MODEL RANGE: |
| PLH120 |
0 to 120V at 0 to 750mA |
| PLH250 |
0 to 250V at 0 to 360mA |
| OUTPUT SPECIFICATIONS |
| Voltage/Current Levels |
| PLH120 |
0 to 120V / 0.01mA to 750mA (90W max.) |
| PLH250 |
0 to 250V / 0.01mA to 375mA (94W max.) |
| Note: Actual maxima for voltage and current are typically 1% greater than the figures given above except for the voltage control on the PLH250/PLH250-P which is limited to 250.0V. |
| Output Setting & Control |
| Voltage Setting |
By coarse and fine controls. |
| Current Setting |
By single logarithmic control. |
| Low Current Range |
Reduces max. current to 75mA and increases resolution to 0.01mA. |
| Output Mode |
Constant voltage or constant current with automatic cross-over.
CC indicator lit in constant current mode. |
| Output Switch |
Electronic, non isolating. Preset voltage and current limit displayed
when Output is off. Output rise time no load <20ms. |
| View Settings |
With the output On, the meters show actual voltage and current.
The preset levels can be viewed and adjusted at any time by pressing
the View Settings button. |
| V-Span |
(Voltage Span 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 1V to 120V or 250V
depending on model. The range for Vmin is 0 to (Vmax – 1V). |
| S-Lock |
(Settings Lock)
Voltage and current settings can be locked by a single button press. Lock accuracy is equal to
the meter accuracy (see Meter Specification). |
| Output Performance |
| Ripple & Noise |
Normal mode voltage: <2mV rms and 10mV p-p
Normal mode current: <10uA rms ; <1uA rms on 75mA range
Common mode current: <20uA rms |
| Load Regulation |
Voltage - <0·01% + 10mV.
Current - typically 0·01% + 50µA. |
| Line Regulation |
Voltage <0·01% + 10mV for 10% line change.
Current <0·01% + 50µA. for 10% line change. |
| Transient Response |
<250µs to within 50mV of setting for a 90% load change. |
| Temp. Coefficient |
Voltage: typically <(50ppm + 2mV)/°C
Current: typically <(100ppm + 0.1mA)/°C;
<(100ppm + 0.01mA)/°C on 75mA range. |
| Output Protection |
| Output Protection |
Output will withstand forward voltages of up to rated output voltage.
Reverse protection by diode clamp for currents to 3A. |
| OVP and OCP Trips |
Voltage or current measured to be in excess of 105% of the rated
maximum will cause the output to trip off. |
| Over-temperature |
Output trips off for over-temperature. |
| Safety Interlocks |
Operations that could cause an unexpected change in voltage or
current settings are interlocked with the output switch. |
| Output Connections |
| Output Terminals |
Universal 4mm safety binding posts on 19mm (0·75”) spacing. |
| Terminals can accept fixed shroud 4mm plugs, standard 4mm plugs, fork terminals and bare wires. |
| Remote Sense |
| Sense Selection |
Voltage sensing is selected as Local or Remote by front panel switch. |
| Sense Terminals |
Sprung loaded screw-less terminals. |
| METER SPECIFICATIONS |
| Display Type |
Dual 4-digit meters, 10mm (0·39”) LED. |
| Voltage Meter |
| Resolution |
100mV |
| Accuracy |
± (0·1% of reading + 100mV) |
| Current Meter |
| Resolution |
0.1mA (0·01mA on 75mA range) |
| Accuracy |
± (0·3% + 0.3mA); ± (0·3% + 0·03mA) on 75mA range |
| Meter Damping |
Normally 20ms, switchable to 2 sec for averaging rapidly varying loads. |
| GENERAL SPECIFICATIONS |
| Input |
| AC Input |
230V AC or 115V AC ± 10%, 50/60Hz. Installation Category II |
| Input Power |
280VA max. |
| Temperature & Environmental |
| Operating Range |
+5ºC to +40ºC, 20% to 80% RH |
| Storage Range |
-40ºC to + 70ºC |
| Environmental |
Indoor use at altitudes up to 2000m, Pollution Degree 2. |
| Cooling |
Intelligent variable-speed low noise fan assists convection. |
| Safety & EMC |
| Safety |
Complies with EN61010-1 |
| EMC |
Complies with EN61326 |
| Physical |
| Size |
PLH models - 107mm x 131mm (¼ rack 3U) x 288mm, |
| Weight |
PLH models - 4·9kg; |
| OPTIONS |
| Rack Mount (RM450) |
19 inch 4U rack mount suitable for up to four PLH series power supplies. Alternatively they
can be mixed with the lower voltage New PL series in a single rack with up to four single
power supplies, two dual power supplies, or any mixture. Blanking plates are provided for
unused positions. The 4U height provides limited ventilation space above and below the power
supplies. |
| GPIB Interface (Option G) |
| Option G adds a GPIB (IEEE-488) interface. This is a factory-fit option only. |