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CB-S / CB-S-UL (E7) 06/2020 page 60/119
15.4.4 CO
2
tolerance range alarm (CO
2
over/under concentration)
If CO
2
control has been deactivated (chap. 9.2), no alarms of the CO
2
gas system will be emit-
ted.
The tolerance range alarm becomes valid only after the setpoint has been reached.
When the actual value leaves the tolerance range the alarm occurs after an adjustable delay time (chap.
13.1). Factory setting: 10 minutes.
• Alarm message “CO2 range”, “collective alarm” icon
• Audible alarm: buzzer
• Switching the zero-voltage relay alarm output
Actions:
• Factory setting for the CO
2
tolerance range is +/- 1.0 vol.-%. Modify the value if necessary (chap. 13.3)
• Use the displayed actual CO
2
value to verify in whether the tolerance range has been exceeded or
fallen below.
CO
2
under concentration alarm:
• Check whether the outer door was open for a long time or is not closed properly. Close the door if
necessary. With open door there can be additional door open alarm.
• Check the door's seals for any damage. Replace any damaged seals.
• If these points do not reveal the source of the fault, it may be that the chamber is faulty. Please contact
BINDER Service.
CO
2
over concentration alarm:
• Open both chamber doors for approx. 30 seconds. Respect the precautions when working with CO
2
gas (chap. 1.8).
• Normal operation can be restarted, as soon as the requested values have been readjusted.
• Reset the alarm message.
If the same alarm recurs, please contact BINDER Service.
15.4.5 CO
2
pressure alarm
If CO
2
control has been deactivated (chap. 9.2), no alarms of the CO
2
gas system will be
emitted.
The CO
2
primary pressure at the intake valve is less than 0.3 bar / 4.4 psi below the ambient air pressure.
The alarm displays show a pressure drop of CO
2
admission below 0.3 bar / 4.4 psi. Check whether the
gas cylinder is open. CO
2
connection pressure is too low.
The alarm occurs immediately.
• Alarm message “CO2 pressure”, “collective alarm” icon.
• Audible alarm: buzzer
• Switching the zero-voltage relay alarm output
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