SMC Sierra Monitor 3600-I, Руководство пользователя

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Model 3600-I IR3 Flame Detector
Page 23 of 66
1.6 Internal Detector Tests
The detector performs two types of self-tests:

Continuous Feature Test, Section 1.6.1

Built-In-Test (BIT), Section 1.6.2
1.6.1 Continuous Feature Test
During normal operation, the detector tests itself continuously and indicates a fault if a failure is found.
This type of test complies with SIL-2 requirements.
The detector continuously tests:

Input voltage level

All internal regulator voltage level

Voltage level status of sensor and sensor circuitry for noise or disconnection in the electronic
circuitry

0-20mA level output

Relays and heater operation

Processor Watch dog

Software

Memory

Oscillator frequency
Response to Fault Indication
If a failure is found, the detector indicates the following.

Fault relay:
o
Opens in wiring option 1, 2, and 4
o
Closes in wiring option 3 and 5

0-20mA: indicates Fault (0mA or 2mA) in wiring option 1, 2, 3

LED: Yellow flashes (4 Hz)
Correcting the Fault
The fault indications remain until the detector’s power is removed. The fault indications return if the fault is
still found when power is restored.