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Range: 0 to 30V at 0 to 3A
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
DIGITAL BUS INTERFACES (PLH-P models only)
The standard PL-P product offers full remote control and read-back using RS-232, USB or LAN
(LXI-C). All interfaces are at ground potential and opto-isolated from the output terminals.
Note: Remote/Local Sense, and Operational Mode (PL303QMD-P) are manually selectable only.
RS-232
Standard 9-pin D connector. Baud rate 9,600.
USB
Standard USB 2.0 connection (backwards compatible with USB 1.x). Operates as a virtual
COM port.
Ethernet (LAN)
Standard 10/100 base-T hardware connection. ICMP and TCP/IP Protocol for connection to
Local Area Network or direct connection to a single PC.
LXI Compliance
LAN interface is compliant with LXI-C. (LXI is the abbreviation for Lan eXtensions for
Instrumentation). For more information visit: www.tti-test.com/go/lxi
GPIB INTERFACE (Option G, factory fit only)
Option G adds a GPIB (IEEE-488) interface.
This is in addition to the RS-232, USB and LAN interfaces of the standard PL-P product. The
interface conforms with IEEE-488.1 and IEEE-488.2
DIGITAL PROGRAMMING PERFORMANCE (PLH-P models only)
Voltage Setting
Setting Resolution: 10mV
Setting Accuracy: ± (0.05% +50mV)
Current Setting
Setting Resolution: 0.1mA (0.01mA on 75mA range)
Setting Accuracy: ± (0.3% +0.1mA); ± (0.3% +0.01mA) on 75mA range
Programming Speed
Command Delay: Typically <25ms (this must be added to any of the figures below)
Voltage Up Time: Typically <45ms* to 1%
Voltage Down Time: Typically <200ms* to 1% (full load); typically <500ms* to 1% (no load)
* The up and down times vary with model, current range and voltage step size. More
information is contained in the operating manual - downloadable from our web site.
Voltage Readback
Resolution: 10mV
Accuracy: ± (0.1% +50mV)
Current Readback
Resolution: 0.1mA (0.01mA on 75mA range)
Accuracy: ± (0.3% +0.1mA); ± (0.3% +0.01mA) on 75mA range
VARIABLE OVP and OCP PROTECTION (PLH-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 conditions.
Setting resolution: 100mV and 0.1mA.
Response time: typically 500ms
ANALOG REMOTE CONTROL (PLH-P models only)
Isolated analog voltage control of voltage and current. Non-isolated analog control outputs
are also provided to enable easy parallel connection of multiple units in a master-slave
configuration.
Control Inputs (Isolated)
Reference Point: Control input voltages are referenced to their own return points.
Set Voltage Input: 0V to 10V sets 0 to 100% of rated output (e.g. 0 to 120V for PLH120-P).
Alternative scaling of 0V to 5V (selectable using internal link).
Set Current Input: 0V to 10V sets 0 to 100% of rated output (0 to 750mA for PLH120-P).
Alternative scaling of 0V to 5V (selectable using internal link).
Set Voltage Accuracy: ± (0.3% +100mV); Input Impedance = 10kW
Set Current Accuracy: ± (0.5% +0.5mA); Input Impedance = 10kW
Control Outputs (Non-isolated)
Reference Point: Control output voltages are referenced to the positive output terminal.
Voltage Output: 0 to 100% of rated output voltage generates 0V to 5V.
Current Output: 0 to 100% of rated output current generates 0V to 5V.
Voltage Out Accuracy:± (0.3% +100mV); Output Impedance = 125W
Current Out Accuracy: ± (0.5% +0.5mA); Output Impedance = 125W
Note that Analog control of current can not be used with the low current range selected.
REMOTE ANALOG ON/OFF CONTROL (PLH-P models only)
Non-isolated terminal which sets the output to Off when pulled low by gate signal or relay
closure. Signal is reference to the positive output terminal.
DRIVER SOFTWARE SUPPLIED (PLH-P models only)
IVI Driver
An IVI driver for Windows is supplied. This provides support for common applications such as
LabView*, LabWindows*, HPVEE* etc.
USB Driver
An installation file is supplied which calls a standard Windows* USB driver.
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,
PLH-P models - 107mm x 131mm (¼ rack 3U) x 315mm,
(sizes exclude feet, knobs and terminals).
Weight: PLH models - 4·9kg;
PLH-P models - 5.0kg
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,
PLH-P models - 107mm x 131mm (¼ rack 3U) x 315mm,
(sizes exclude feet, knobs and terminals).
Weight: PLH models - 4·9kg;
PLH-P models - 5.0kg
