TTI QPX1200 Service Manual page 4

Over-voltage Protection
(OVP):
Over-current Protection
(OCP):
Over-temperature Protection:
Temperature Coefficient:
METER SPECIFICATIONS
Display Type:
Voltage (CI Mode and Unreg):
Current (CV Mode & Unreg):
V x A:
LOGIC CONTROL INPUT and OUTPUT
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.
ANALOG REMOTE CONTROL and MONITORING
Non-isolated inputs and outputs to set voltage and current limit and to monitor actual output voltage
and current. These signals are referenced to the positive output and have a range of 0 to 10V or 0
to 5V (selectable via the keyboard).
Analogue Control Accuracy:
Analogue Monitor Accuracy:
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.
DISPLAY FEATURES
The display is a 240 x 64 pixel transflective LCD, backlit by white LEDs; contrast is software-
controlled and can be adjusted from the keyboard.
The default status display shows the VOLTS (5 digits) and AMPS (4 digits) in 10mm high characters,
plus the present output mode. At other times, for example during store or recall of instrument set-
ups, the display shows up to 6 lines of information, instructions, or prompts.
Range 2V to 65V. Resolution 0.1V; accuracy: 0.2% ± 0.2V.
Response time typically 100µs.
Range 2A to 55A. Resolution 0.1A; accuracy: 0.5% ± 0.2A.
Response time typically 100ms.
The output will be tripped off if a fault causes the internal
temperature to rise excessively.
Typically <100ppm/°C
5-digit (Volts), 4-digit (Amps), black-on-white backlit LCD.
Resolution 1mV
Accuracy: 0.1% of reading ± 2 digits
Resolution 10mA
Accuracy: 0.3% of reading ± 2 digits
Resolution 0·1W
Accuracy: 0·5% ± 0·1W
Voltage: 0.3% ± 4mV; Current: 0.5% ± 40mA
Voltage: 0.3% ± 4mV; Current: 0.5% ± 40mA
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