Instruction Manual
ExTox Control Unit ET-1D Series
Page 12 of 17
Horn (K4):
triggered, if set alarm level is reached
Integrated Signaller:
sounds, if set alarm level is reached.
5.3
Under-Scale and Over-Scale of Measuring Range
The measured value is within the range below 0 % and above 100% of the end value of
measuring range.
In case of Under-Scale of measuring range measures for correction of Zero Point should be
taken. The deviation value could always be evaluated more precisely in the menu NPC by
means of the transmitter output current.
In case of Over-Scale of measuring range due to high gas concentrations corresponding
measures for the individual transmitter should be taken, such as for example calibration and
adjustment.
Status LEDs
Alarm 1, 2 (red):
corresponding to measuring operation (5.1) or Alarm (5.2)
Operation:
corresponding to measuring operation (5.1) or Alarm (5.2)
Fault:
off
Display
Actual Value:
< 0 or > End Value of Measuring Range
Bar Graph:
0 or end value of measuring range
A1, A2
corresponding to measuring operation (5.1) or Alarm (5.2)
Relays
Alarm 1 and 2 (K1, K2):
corresponding to measuring operation (5.1) or Alarm (5.2)
Fault (K3)
:
not triggered
Horn (K4):
corresponding to measuring operation (5.1) or Alarm (5.2)
Integrated Signaller:
corresponding to measuring operation (5.1) or Alarm (5.2)
5.4
Channel Fault
The input current of the transmitter is outside the limits fixed in the system parameters,
that means below I
min
= 1.5 mA or above I
max
= 22.5 mA.
Reason for that might in general be a transmitter fault, interruption of transmitter power
supply, interruption or short circuit of transmitter cable.
Attention: Please keep in mind that in case of channel fault the respective alarms are acti-
vated. This happens when passing the limit I
max
if the exceeding of alarm levels is moni-
tored. It happens when passing the limit I
min
if the under-run of alarm levels is monitored.
In both cases the following details as well as the additional information as per Chapter 5.2
are valid.
Status LEDs
Alarm 1, 2 (red):
corresponding to measuring operation (5.1) or Alarm (5.2)
Operation:
on
Fault:
on
Display
Actual Value:
<< 0 or >> end value of measuring range
Bar Graph:
0 or end value of measuring range
A1, A2
corresponding to measuring operation (5.1) or Alarm (5.2)
Relays
Alarm 1 and 2 (K1, K2):
corresponding to measuring operation (5.1) or Alarm (5.2)
Fault (K3)
:
triggered
Horn (K4):
corresponding to measuring operation (5.1) or Alarm (5.2)
Integrated Signaller:
corresponding to measuring operation (5.1) or Alarm (5.2)
