TTI QL355 Service Manual page 4

Over-voltage Protection:
(OVP)
Over-current Protection:
(OCP)
Protection Functions:
METER SPECIFICATIONS
Display Type:
Voltage (CI mode):
Current (CV mode):
V x A:
AUXILIARY OUTPUT (QL355T/TP)
Voltage:
Voltage Accuracy:
Current Limit:
Output Protection:
Output Terminals:
Ripple & Noise:
(20MHz bandwidth)
Load & Line Regulation:
Status Indication:
ALARM OUTPUT
Isolated rear-panel open-collector output signal. User can select output to be activated for either
OVP, OCP, Overtemperature or Sense miswiring, or for any of those four faults.
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.
INTERFACES (QL355P/TP & QL564P only)
Full remote control facilities are available through the optional RS232, GPIB and USB interfaces.
Setting and readback resolutions are the same as for the Output and Meter specifications
respectively.
RS232:
IEEE-488:
USB:
Remote Command
Processing Time:
Range 1V to 40V (QL355), 1V to 62V (QL564)
Resolution 0·1V; accuracy ± (2% + 0·5V)
Response time typically 100µs
Range 0·01A to 5·5A (QL355), 0·01A to 4·4A (QL564)
Resolution 0·01A; accuracy ± (0·2% + 0·01A)
Response time typically 35ms
Output trips off for OVP, OCP, over-temperature and Sense miswiring.
5-digit (Volts), 4-digit (Amps), 14mm (0·56") LED.
Resolution 10mV
Accuracy ± (0·1% of reading + 10mV)
Resolution 0·001A; 0·1mA on 500mA range
Accuracy ± (0·2% + 0·005A); ± (0·2% + 0·5mA) on 500mA range
Resolution 0·01W; 0·001W on 500mA range
Accuracy ± (0·3% + 0·05W); ± (0·3% + 0·005W) on 500mA range
2·7V, 3·3V or 5V, selectable by front panel switch.
± 5%
1A minimum
Output will withstand up to 16V forward voltage. Diode clamp reverse
protection for currents up to 3A.
4mm terminals on 19mm (0·75") spacing. Duplicate screwless
terminals on rear panel.
Typically <1mV rms
<1·0% for a 90% load change; 0·1% for a 10% line change.
Current limit lamp.
Variable Baud rate, 19200 Baud maximum. 9-pin D-connector.
Single instrument or Addressable RS232 Chain (ARC) operation.
Conforming with IEEE488.1 and IEEE488.2
Standard USB hardware connection.
Typically <80ms between receiving the command terminator for a
step voltage change at the instrument and the output voltage
beginning to change.
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