TELEDYNE OLDHAM SIMTRONICS Everywhereyoulook DG-TT7-S, Operating Manual

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MULTITOX DETECTOR
OPERATING MANUAL
32 NOSP17668
Revision 03
a
Display time:
The detector displays concentration or status. Depending on events, the detector displays
cyclically important information according to the context: unit, gas, label, fault, alarms, inhibition
and the time remaining inhibition….
Output current (4-20mA ou 0-22mA) :
It can be modified by the user. See §6.8.6.2.
Negative concentration:
The negative concentration display allows to anticipate the zero drift fault.
It can be modified by the user. See § 0.
6.4 Alarm indication
When an alarm status is confirmed, the backlight turns red. Moreover, the display indicates the
alarm level and the current concentration.
The remaining information which is usually recorded in the display cycle are not provided
anymore, in order to keep the detection and current alarm level as a priority.
If the alarm memorization is enabled, the backlight remains red and the alarm indication appears
in the display cycle until the alarm is acknowledged with the TLU, TLH700(Hart) or the magnetic
wand or until the detector is powered off, then powered on again.
If the alarm memorization is disabled, the backlight turns green when the alarm fades.
If the device is used in a safety loop in a potentially explosive area (EN60079-
29-1), the upper alarm must be memorized, and a manual action must be taken
to clear it.
6.5 Display indication
The 4 Digits display provides several information, depending on the state of the device:
Starting:
•
Display cycle : concentration and measuring scale (meas then % or ppm then gas)
•
Alternately indicates the inhibition mode and the remaining warming up time