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ultiFlame DF-TV7 Page 31 / 56 NOSP16358-03 [04/2016]
6. OPERATION
6.1. Environmental conditions
• Dust: Dust on the window may limit UV sensitivity
• Oil vapour: Oil vapour on the window can reduce UV sensitivity
• Water/Ice: The presence of Water or ice can reduce flame detector performances at
an infrared level.
6.2. Inhibition
Maintenance Inhibition is temporary. It appears during power up and maintenance phases.
Inhibition stops automatically when the operator leaves the maintenance menus or 10
minutes after the end of communication with the TLU.
Maintenance inhibition can be configured in "frozen" mode (factory setting) or in "free"
mode.
• In "frozen" mode, outputs (current and relay) remain in their previous state.
For example, if the device indicated a failure (2.0 mA), this state would be maintained
during the inhibition.
• If the unit is configured in "free" inhibition mode, the output current will be on the
same level as for the permanent inhibition
The permanent inhibition is activated by an order issued by the TLU when an operation is
performed at/or around the device, or when the operator wants to inhibit a faulty device. The
permanent inhibition must be removed by an operator’s deliberate action using the TLU.
When working with the LT15 test lamp, the detector must be in TEST-mode. The default
output is in maintenance inhibition; but the detector’s outputs (current loop and relays) may
be activated in order to test the complete loop (Requires access level 2 on the TLU).
Local LED and Information on the TLU are activated anyway.
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