TTDM–NMM and - California Detection Systems

The TTDM-NMM System Display and Keypad
The Icons
The Icons represent the four states of the TTDM-NMM leak detection network.
Green Yellow Red Red
Monitoring
Service
Leak
Fault
Note: The Service, Leak, and Fault LEDs will illuminate if the condition exists on any
SIM channel (i.e., the TTDM-NMM display uses OR logic). Therefore, multiple LEDs
may be illuminated simultaneously to indicate multiple types of alarms, perhaps on
different SIM channels.
Monitoring
This green LED indicates that the TTDM-NMM is monitoring the -SIM units attached
to the TraceTek leak detection network.
Service
The TTDM-NMM is able to give advance warning of potential problems. This yellow
Service LED illuminates to indicate that service is required on one of the sensing
cables attached to the network. Note that the green LED remains illuminated; the unit
continues to monitor for leaks during a Service alarm For further detail, see the
“Service Events” section on page 9.
Leak
When liquid is detected in contact with a sensing cable, this red Leak LED illuminates. Note
that the green LED remains illuminated; the unit continues to monitor for leaks and spills.
This is covered more fully in the section “Leak Detection and Location Events” on page 8.
Fault
When the TTDM-NMM module detects a fault — either a cable fault or an electronics
fault — it lights this red LED. After a fault on an individual SIM has been detected, the
NMM module will, in most cases, continue to scan the remaining SIM units and their
associated sensing cable. However, some fault conditions may disable multiple channels
or even the entire system. The TTDM-NMM is unable to detect a leak on any
channels affected by a fault, so always investigate the cause of a Fault condition
immediately. For further information, see the “Fault Events” section on page 10.
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