Technical data

Functions
14
DME
3
Languages
The display text can be displayed in one of the
following languages chosen in the set-up menu:
• English, German, French, Italian, Spanish,
Portuguese, Dutch, Swedish, Finnish, Danish,
Czech, Slovak, Polish, Russian.
Integrated vent valve
The DME dosing pumps are provided with an
integrated vent valve (1). The vent valve makes
priming during start-up very easy.
The vent valve must be connected to the tank by
means of a 15/20 mm PVC hose.
Fig. 13 Integrated vent valve
Switch-mode power supply
The DME pump incorporates a switch-mode power
supply. This makes the pump independent of
variations in supply voltage and frequency.
Operating range: 1 x 100-240 V, 50/60 Hz.
Level control
Applies to DME-AR and DME-AP
The pump can be connected to a level control unit for
monitoring of the chemical level in the tank. The pump
can react to two level sensor signals.
★ Applies to control variant AR.
Bus communication
The DME-AP is available with a built-in module for bus
communication with PROFIBUS DP systems.
This module enables remote monitoring and setting via
the fieldbus system.
All DME features are available via bus communication.
The PROFIBUS GSD-files can be found on the product
CD included in the standard delivery.
Diaphragm leakage sensor
The pump can be fitted with a diaphragm leakage
sensor. The sensor is connected to the drain hole of
the dosing head. In case of leakage of the diaphragm,
the signal from the sensor generates an alarm in the
pump, and the alarm relay is activated. When dosing
crystallising media, a diaphragm leakage sensor must
be installed.
Dosing monitoring
Fig. 14 Dosing monitor mounted on pump discharge side
The dosing monitor is designed to monitor the dosing
of liquids which may cause gas accumulation in the
dosing head, thus stopping the dosing process even if
the pump is still operating.
During the dosing process, the dosing monitor gives
pulse signals to the monitor input so that the pump can
compare performed dosing strokes (from internal
stroke sensor) with externally measured physical
strokes (from dosing monitor). If an external dosing
stroke is not measured as a result of the internal
dosing stroke, this is considered a fault that may have
been provoked by empty tank or gas in the dosing
head.
The dosing monitor should be connected to the input
for dosing monitoring (pins 4 and 5). This input must
be configured for dosing monitoring.
Once the input has been set to dosing monitoring and
a dosing monitor has been connected and set, the
dosing monitoring function will be active.
TM04 8486 0612
Level sensors Pump reaction
Upper sensor activated
• Red indicator light is on.
• Pump is running.
• Alarm relay is activated.
★
Lower sensor activated
• Red indicator light is on.
• Pump stops.
• Alarm relay is activated.
★
1
TM04 8790 1313