Simtronics MultiTox DG-TT7-S, Operating Manual

Page: 29 / 59

MultiTox : DGi-TT7-E/O & DG-TT7-S
Page 29 / 60 NOSP 16452-05 (08/2016)
6.2. Inhibition
Maintenance Inhibition is temporary. It appears during power up and maintenance.
Inhibition stops automatically when the operator gets out of the maintenance menus or after
10 minutes if communication with the TLU has been interrupted.
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 with the TLU.In a similar way as the
maintenance inhibition, this mode will lead to a purple switch of the backlight.
6.3. Signal current loop
State
“4-20”
[mA]
“0-22”
[mA]
Display
TLU state
Line fault 0.0 0.0
Configuration fault 2.0 2.0
DEF & yellow Backlight
DEF
Detector fault (electronic) 2.0 2.0
DEF & yellow Backlight
DEF
Measure fault 2.0 2.6 DEF & yellow Backlight DEF
Start inhibition 2.0 3.4 INH & violet Backlight
& cycle**
Warming-up
Remaining time
including power up
Permanent inhibition 2.0 3.4
INH & violet Backlight
& cycle**
INH
Maintenance inhibition
Fixed configuration (fault) /
(“free mode ”) * Previous
value /
(2.0)
Previous
value/
(3.4)
INH & violet Backlight
& cycle**
INH
0% of full scale 4.0 4.0 Cycle**
& green Backlight 0
No detection
No alarm
25% of full scale 8.0 8.0 Cycle**
AL1 or AL2 if reached
Alarm if level
exceeded
50% of full scale 12.0 12.0
Cycle**
AL1 or AL2 if reached
Alarm if level
exceeded
75% of full scale 16.0 16.0 Cycle**
AL1 or AL2 if reached
Alarm if level
exceeded
100% of full scale 20.0 20.0
Cycle**
& red Backlight 100 -
AL2
Alarm
105% of full scale 20.8 20.8 Alarm
(*)
Maintenance inhibition may be available in frozen or free mode.
(**) The cycle is the display sequence of the concentration, unit of measure and target gas .