Specifications

Programming and Operating 4
SHM80001
SAFETY HI-TECH
Quaestor-SZU Releasing Fire Control Panel - Installation and Operation Manual
Revision E03.04
54 of 155
Calibrating the Releasing Circuit
Calibrate the releasing circuit by adjusting the EXTING. MON. potentiometer on the front-panel of the of the
Quaestor-SZU Releasing Fire Control Panel. Adjust the EXTING MON setting to provide supervision of the
“EXTING.” output with the field wiring complete.
To perform the calibration:
1 Verify that the EXTING voltage output is in the range of (-0.2 to -1.0 volts).
(If not, check field wiring and polarity of EOLD.)
2 Verify that, when activated, the voltage drop from the EXTING output terminals to the releasing device (and
EOLD) is less than the permitted 2.4 volts.
3 If the panel is indicating an active Releasing Trouble, turn the Exting Mon adjustment clockwise until the
Releasing Trouble clears.
4 If the panel is indicating no Releasing Trouble, turn the Exting Mon adjustment counter-clockwise until the
Releasing Trouble activates.
5 Once at this threshold, turn the Exting Mon adjustment one full turn clockwise.
6 Verify that a short circuit at the releasing device results in a Releasing Trouble indication at the panel.