Instruction Manual
ExTox IMC-8/-4
BA_IMC-8_-4_e_2019-12-17.docx
Page 9 of 22
Access level to perform changes within this menu: 3
Menu Text
Selection
Function
FLOW-MIN
0 to 300 l/h
Only activated in Systems with DDL-Module (see 6.1.1)
Lower limit of flow rate monitoring in l/h. Under-scale leads
to system fault
Unterer Grenzwert für die Durchflussüberwachung in l/h. Bei
Unterschreiten wird eine Gerätestörung ausgelöst.
(Standard setting: 15 l/h)
FLOW-MAX
0 to 300 l/h
Only activated in Systems with DDL-Module (see 6.1.1)
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 E2
Status signal flow rate (
only allocated in systems with Flow-Meter, see
6.1.2
)
Digital input E3
Status signal housing fans (
only allocated in systems with Flow-Meter,
see 6.1.2
)
Digital input E4
External activation of maintenance mode is not provided
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 adequate
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
3
. 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.
3
Depending on type the necessary test gas volume stream may be considerably above the indicated volume stream.
