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promesstec GmbH
I Niedersachsenstraße 4 I D-48465 Schüttorf I Tel.:+49 (0)5923/ 90 229 0 I Fax:+49 (0)5923/ 90 229 29
E-Mail: [email protected] I Internet: www.promesstec.com
5. Putting into operation
Prior to connection to power supply, check the device installation
accuracy in accordance with “Installation in pipeline“ and “Wiring”
chapters.
If an exact measurement (reference measurement) is to be carried out directly
after installation, it is recommended to cover the measuring electrodes with
water 1 or 2 days before installation. Immediately before installation the water
should be drained off and the flow sensor should be installed immediately to
prevent the electrodes from drying out.
If the meter has no electrode for empty tube detection, do not connect the meter to
power before filling the system with the fluid to be measured and power off the meter
before system discharge.
Immediately after power on, the green LED on the front display of the MDW / MDH
500 will light up, indicating that voltage is applied to the device and the flow meter
is loading its data. As soon as the data are stabilized, the measurement starts.
5.1 Meter status
The status of the measuring device is continuously shown on the display. In case of
a malfunction or failure, the operator is informed by a flashing display. The status
displays of the meter are divided into 4 main groups:
1) OK
everything is all right
2) Warning
the meter takes measurement but some of the parameters are
out of range
3) Error
critical error
– the meter does not take measurement
4) Empty tube
if the EMPTY TUBE TEST function is activated
Flow direction:
The arrow on the stainless steel shield indicates the direction in which the
liquid flows inside the sensor. This helps to correctly mount the meter in the
pipe. The flow direction can be changed using the control buttons and the
menu. This avoids error measurements.
Basic parameter settings
The meter or flow meter parameters are set by the manufacturer in accordance with
the purchase order. If these values are not indicated in your purchase order, the
meter will be set up using the default parameters in accordance with the meter's
range. The operator can make modifications by means of three buttons on the me-
ter's panel or through the RS485 interface.
Safety rules for operator
Any interventions in the inductive flow sensor and evaluation unit it-
self are illegal on the part of operator and they may lead to direct
scalding by medium. Perform electrical connection always after
powering off.
