Spectrex SafEye Xenon 700S, Руководство пользователя

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TM 799200, Rev. (4), April 2017 29
3 Operating Modes
In this chapter…
Operational Modes page 29
Output Signals page 31
System Setup page 33
Operational Modes 3.1
The SafEye 700S has 4 operational modes:
 Normal Mode
 Maintenance Call Mode (3mA Output)
 Fault Mode
 Zero Calibration Mode (1mA Output)
3.1.1 Normal Mode
This mode is used for gas detection. In normal mode, the following statuses
are possible:
 Normal (N): Signal received from gas detection is at safe levels
 Warning (W): Gases have been detected at warning levels
 Alarm (A): Gases have been detected at alarm levels
Note : For the standard 0–20mA output, the warning and alarm levels are
not relevant. The user chooses these alarm levels at the controller. The
output detector will be 4mA at zero reading and 20mA for full-scale reading.
Warning and alarm states are relevant where the stepped 0–20mA output is
used and will energize the warning and alarm relays.
If the RS-485 output is used, the detector changes its status from “N” to
“W” at warning level and to “A” at alarm.