TTI PL Series - Quad Mode Calibration; PL310 QMD;QMT and PL320 QMD;QMT; PL330 QMD;QMT

Set current limit to maximum, output off and adjust VR4 for:
1100mA - PL310
2100mA - PL320
3100mA - PL330
4050mA - PL154
Quad Mode Calibration
The above calibration must be carried out first.
i)
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PL310QMD/QMT and PL320QMD/QMT
Select parallel mode, output switches OFF
Master current limit to maximum
Adjust VR2 on switchbank pcb for
2100mA - PL310QMD/QMT
4050mA - PL320QMD
on the master ammeter
Select tracking mode, output switches ON
Set master output voltage to approximately 30V
Adjust VR1 on switchbank pcb so that the above voltmeter reads the same as the master
voltmeter.
ii) PL330QMD/QMT
Select parallel mode, output switches OFF
Set master current limit to approximately 5A
Master output switch ON
Connect ammeter between the master output terminals
Adjust VR10 on the master main pcb for the same reading on the internal and external ammeters.
Remove external ammeter and connect the DVM to the master sense terminals.
Set master coarse voltage control to maximum.
Adjust VR11 on the master main pcb for the same reading on the internal and external
voltmeters.
Note: In parallel mode, VR10 affects both the voltmeter and ammeter calibration; VR11 affects
only the voltmeter.
Output switches OFF
Master current limit to maximum
Adjust VR2 on the switchbank pcb for 6100mA on the master ammeter
Select tracking mode, output switches ON
Set master output voltage to approximately 30V
Adjust VR1 on switchbank pcb so that the slave voltmeter reads the same as the master
voltmeter.
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