AUTOFLAME Mk8 MM User Manual

10 Water Level Control
Mk8 MM Manual Page | 185
10.7 Analogue Water Level
An external level sensor (4-20mA input) can be used for water level detection on the Mk8 MM. This sensor
will give an analogue signal to the MM to indicate level across a 4-20mA input range. The water levels
commissioned for the external level sensor are the same for the capacitance probes which are HIGH,
CONTROL POINT, 1
st
LOW, 2
nd
LOW and END OF PROBE.
The table below shows the terminals allocated on the MM for an external level sensor.
Terminal
Description
EX-
Common for terminal EX+
EX+
Current input, 4-20mA for external water level probe (or fuel flow feedback)
The table below shows the expansion options to be set to for using external level sensor on the MM.
Expansion Option
Description
Setting
1
Water level control function
1
4
External level sensor
1
30
External level sensor scaling
As required
31
External level sensor filter time
As required
Note: An additional water level safety device such as 2
nd
low probe or an auxiliary alarm input is required as
minimum with the analogue water level detection device
Note: The external level sensor cannot be used with 4-20mA input for the fuel flow feedback, see option 57.

AUTOFLAME Mk8 MM Specifications

General

Brand	AUTOFLAME
Model	Mk8 MM
Category	Controller
Language	English