Instruction Manual
ExTox IMC-8/-4
BA_IMC-8_-4_e_2011-09-20.doc
Page 11 of 24
5.1.2
Parameter Settings
▪
System Parameters
In the menu System Parameter the operation mode "IMC" instead of "ET-8" and "ET-4" is fac-
tory-sided activated.
Attention:
Changing of these settings should in no way be done by the user. Changed meas-
uring functions may otherwise lead to loss of safety functions.
The menu point OPTIONS comprises now also the possibilities of setting for flow rate monitor-
ing (see 6.1) and change-over of measuring points.
Access Level to perform changes within this Menu: 3
Menu Text
Selection
Function
FLOW-MIN
0 to 300 l/h
Lower limit of flow rate monitoring in l/h. Under-scale leads
to system fault.
(Standard setting: 15 l/h)
FLOW-MAX
0 to 300 l/h
Upper limit for flow rate monitoring in l/h. Over-scale leads
to system fault.
(Standard setting: 60 l/h)
▪
Channel Configuration
The IMC channels are activated in the same manner as channels for external transmitters in
the menu Channel Configuration by setting the Mode ON.
5.1.3
Pre-configured Relays and Digital Inputs
The following relays cannot be configured freely.
IMC-8D (IMC-4D)
Application
Relay K21 (K9)
Internally allocated
Relay K22 (K10)
Internally allocated
Relay K23 (K11)
Control of measured gas pump
Relay K24 (K12)
Control of magnetic valve (MV1) for switching between measured gas
and test gas
Digital Input E3
Status signal housing fans (only for systems with DDL-Module 2.0, see
6.1)
5.1.4
Calibration and Adjustment
Calibration and adjustment is done by application of test gases at the inlet of test gas. From
the inlet of measured gas the gas inlet can be changed-over to the inlet test gas/flushing air
via magnetic valve. For that purpose you have to select the menu maintenance. You can switch
between both gas inlets by pressing the keys SHIFT + F4.
Application of test gas should be done pressure less. It has always to be ensured that an ade-
quate test gas volume stream is provided, that means an application of test gas has to be set
which corresponds to the one in measuring operation
1
. This is to avoid that air is additionally
sucked in and dilution of the test gas resulting from this falsifies calibration / adjustment.
When adjusting please follow the hints in the Instruction Manuals of transmitter and control
unit.
1
Depending on type the necessary test gas volume stream may be considerably above the in-
dicated volume stream.
