Alarm; Over-Range; Configuration Change And Parameters; Ma Loop Parameters - Honeywell SEARCHLINE EXCEL PLUS Technical Manual

54 Chapter 8 Operation and Configuration
8.5.2 Alarm
During Alarm, the Alarm2 relay is energized/de-energized depending on its configuration. The 4–20 mA loop is set to 20 mA
in Discrete mode. It is proportional to gas concentration in Proportional mode. The visual indicator flashes red.
8.5.3 Over-range
Searchline Excel Plus & Searchline Excel Edge indicate Over-range when a high gas concentration is detected.
During Over-range, the Fault relay is additionally energized/de-energized depending on its configuration.
The 4–20 mA loop is set to >20 mA in both Discrete mode and Proportional mode. The visual indicator flashes red.
Searchline Excel Plus & Searchline Excel Edge indicate Fault for thirty seconds after the Over-range condition is no longer
detected.
Note
Searchline Excel Plus & Searchline Excel Edge log 10 minutes of recording for each of the last 5 verified alarms.
The 10 minutes are divided into 5 minutes before and 5 minutes after the alarm.
8.6 Configuration Change and Parameters
CAUTION
!
The unit must be set to Inhibit mode to allow for configuration change. The configuration change will only be accepted
from the interface (Bluetooth, HART) which has set the Inhibit mode.
CAUTION
!
Configuration change and/or maintenance can be performed using only one type of interface at a time (Bluetooth or
HART). Simultaneous use of multiple interfaces is not supported.
8.6.1 mA Loop parameters
CAUTION
!
Configuration of the mA Loop parameters will be accepted if the following relationships between values are maintained:
<=
mA Loop Fault mA Loop Inhibit
<=
mA Loop Alarm 2/Alarm 3
<=
mA Loop Fault mA Loop Inhibit
<=
mA Loop Inhibit mA Loop Warning
<=
mA Loop Warning mA Loop Normal (if Warning is set lower than Normal, Warning must be set higher by at least
<=
mA Loop Normal mA Loop Alarm 1
<=
mA Loop Alarm 1 mA Loop Alarm 2 (if Alarm 1 is set lower than Alarm 2, Warning must be set higher by at least
mA Loop Alarm 3 must equal to mA Loop Alarm 2
<=
mA Loop Alarm 2 mA Loop Overrange
<=
mA Loop Warning
<=
mA Loop Overrange
(if Fault is set lower than Inhibit, Warning must be set higher by at least 0.4 mA;
else Fault must equal to Inhibit)
(if Inhibit is set lower than Warning, Warning must be set higher by at least
0.4 mA; else Inhibit must equal to Warning)
0.4 mA; else Warning must equal to Normal)
(if Normal is set lower than Alarm 1, Warning must be set higher by at least
0.4 mA; else Normal must equal to Alarm 1)
0.4 mA; else Alarm 1 must equal to Alarm 2)
(if Alarm 2 is lower than Overrange, Warning must be set higher by
at least 0.4 mA; else Alarm 2 must equal to Overrange)
Searchline Excel™ Plus / Searchline Excel™ Edge – Technical Manual
<= <=
mA Loop Normal mA Loop Alarm 1