| OUTPUT SPECIFICATIONS |
| Voltage/Current Levels |
| Voltage Range |
0V to 60V |
| Current Range |
0A to 50A |
| Power Range |
Up to 1200W - see PowerFlex power envelope graph. |
| Operating Mode |
Constant voltage or constant current with automatic cross-over
and mode indication. |
| Output Setting |
| Voltage Setting |
By floating point numeric entry or rotary jog wheel; resolution 1mV. |
| Current Setting |
By floating point numeric entry or rotary jog wheel; resolution 10mA. |
| Setting Accuracy |
Voltage - 0.1% ± 2mV
Current - 0.3% ± 20mA |
| Setting Stores |
Up to 10 set-ups can be saved and recalled via the keyboard
(or the digital interfaces on QPX1200SP and QPX1200L). |
| Keyboard & Rotary Control |
All functions, including the selection and set-up of the remote control interfaces, can be set from
the keyboard. The rotary Jog control can be used to adjust output voltage and current settings in a
quasi-analogue mode. The output to be controlled is first selected with the appropriate Control key. |
| Output Performance |
| Load regulation |
<0.01% +5mV (CV mode) for any load change within the
PowerFlex envelope, using remote sense. |
| Line regulation |
<0.01% +5mV for a 10% line voltage change. |
| Ripple & Noise |
Typically <3mV rms, <20mV pk-pk, (20MHz bandwidth). |
| Transient Response |
<250µs to within 100mV of set level for 5% to 95% load change. |
| Temp. Coefficient |
Typically <100ppm/oC. |
| Sensing |
Selectable local or remote sensing. |
| Output Protection |
| External Voltage |
Output will withstand forward voltages of up to 70V.
Reverse protection by diode clamp. |
| Power Limit |
Automatic protection within PowerFlex control system. |
| Fault Trip |
The output will be shut down if any of the four trip conditions listed
below occur. |
| Over Voltage (OVP) |
Settable 2V to 65V in 0.1V steps |
| Over Current (OCP) |
Settable 2A to 55A in 0.1A steps |
| Over Temperature: |
Monitors internal temperature rise to protect against excess ambient
temperature or blocked ventilation slots. |
| Sense Error |
Monitors the voltage between the remote sense terminals and output
terminals to protect against mis-wiring. |
| Output Switching |
| Push switch operating electronic power control. LED indication of On state |
| Connection |
| Output Terminals |
Front and rear output terminals. Safety terminals accepting 6mm wire
diameter, 6mm plugs or 8mm spades at 50 Amps max, |
| Sensing Terminals |
Screw-less terminals on front panel and on rear panel. |
| METERING |
| Display Type |
Large dot-matrix black-on-white backlit LCD. |
| Meter Function |
5 digit voltage meter and 4 digit current meter. Display of limits values,
memory contents etc. Wide range of alpha-numeric messages/menus. |
| Limits Display |
Limits settings can be displayed simultaneously with measurements. |
| Meter Resolution |
Voltage: 1mV. Current: 10mA |
| Meter Accuracy |
Voltage: 0.1% of reading ± 2 digits (CI mode and Unreg)
Current: 0.3% of reading ± 2 digits (CV mode and Unreg) |
| Additional Metering Functions |
| V x A |
Display shows calculated power in watts. Resolution 0.1W.
Accuracy 0·5% ± 0·1W |
| V/A |
Display shows calculated resistance. Resolution up to 5 digits.
Measurement uncertainty is shown on display. |
| ANALOG & LOGIC INTERFACE |
| Analog Remote Control and Monitoring |
Non-isolated inputs and outputs to set voltage and current limit and to monitor actual output volt-
age and current. These signals are referenced to the negative output and have a range of 0 to 10V
or 0 to 5V (selectable via the keyboard). Note that the analog control voltage is digitised within the
power supply. |
| Control Accuracy |
Voltage: 0.3% ± 4mV; Current: 0.5% ± 40mA |
| Monitor Accuracy |
Voltage: 0.3% ± 4mV; Current: 0.5% ± 40mA |
| Analog Remote Control and Monitoring |
LOGIC IN is a rear-panel opto-isolated input that is activated at an input current greater than
approximately 1mA. User can set LOGIC IN (via the keyboard) to enable the output, disable the
output, or be ignored when it is activated.
LOGIC OUT is an isolated rear-panel open-collector output that will sink up to 2mA when activated
(‘switch closure’); the maximum voltage that can be applied to LOGIC OUT is 30VDC. User can set
LOGIC OUT to be ‘closed’ or ‘open’ for output enabled or disabled, current limit
(CI mode), power limit (UNREG mode), or for any fault trip. |
| DIGITAL BUS INTERFACES (QPX1200SP only) |
The QPX1200SP offers full remote control and read-back using RS-232, USB, GPIB or LAN
(compliant with LXI class C). All interfaces are at ground potential and opto-isolated from the
output terminals. The QPX1200L has USB, RS-232 and LXI compliant LAN only (no GPIB). |
| RS-232 |
| Standard 9-pin D connector. Baud rate 9,600. |
| USB |
| USB 2.0 connection (backwards compatible with USB 1.x). Operates as a virtual COM port. |
| GPIB (IEEE-488) |
| The interface conforms with IEEE-488.1 and IEEE-488.2. |
| 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 class C. (LXI is the abbreviation for Lan eXtensions for
Instrumentation). |
| DIGITAL PROGRAMMING PERFORMANCE (QPX1200SP only) |
| Setting Accuracy and Resolution |
| As per Manual Control (see Output Setting under Output Specifications) |
| Programming Speed |
| Command Delay |
Typically <100ms between receiving the command terminator for a step
voltage change at the instrument and the output voltage beginning to
change. |
| DRIVER SOFTWARE SUPPLIED (QPX1200SP 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.
* LabView and LabWindows are trademarks of National Instruments.
HPVEE (now Agilent VEE) is a trademark of Agilent Technologies.
* USB interface is supported for Windows 2000, XP, and Vista. Windows is a trademark of Microsoft. |
| GENERAL SPECIFICATIONS |
| Input |
| AC Input: |
110V to 240V AC ±10%, 50/60Hz. Installation Category II. |
| Input Power |
1600VA 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 fans. |
| Safety & EMC |
| Safety |
Complies with EN61010-1 |
| EMC |
Complies with EN61326 |
| Physical |
| Size |
350 x 130 x 413mm (WxHxD) (3U height) . |
| Weight |
9.2kg (20lb). |
| Benchtop Operation |
Folding legs are incorporated that can be used to angle the front panel
upwards when required. |
| MODEL RANGE |
QPX1200S - Analog interface only
QPX1200SP - Analog, USB, RS-232, LAN and GPIB interfaces. |
| OPTIONS |
| Rack Mount (RM310 or RM310A) |
| 19 inch 3U rack mount. |