Manual -MD150A –27.10.2014 –v.1.2
3.2 Example of parameter change
After correct connection of external elements and switching power supply on, MD150T process
display is ready for operation with previously used settings, and in case of first operation –with
factory settings.
In order to enter programming mode, press . The display shows 1. P1, if the password is
switched off or 0000, if it is active. . In such case, in order to enter programming mode (at
active password) enter the password and confirm it with the key ;
With subsequent pressing of key you switch to next parameters and with pressing of
key you return to previous parameters.
At the selected parameter you want to change, press ;
With key select display digit position you want to change and change its value with key
. Confirm the entered value with key ;
Value of single digit parameters is selected with keys and ;
If you want to enter a negative value select the first digit (from the left) then press and hold
key until the symbol “-“ is displayed.
With key you confirm the introduced change and with key you abort the change or
exit the menu.
Prolonged pressing of keys or results in automatic increase/decrease of a given
position/value.
4Configuration of measurements
4.1 Configuration of 0-10V / 0-20mA input
Depending on the output standard of the applied sensor, you should select an appropriate process
display input mode. It is achieved with 5.INPUT. For sensors with voltage output or at
measurements of signals from potentiometer sensors, set 0-10V mode. For sensors with current
output with range 0-20mA (e.g. 4-20mA) set 0-20mA mode.
4.2 Configuration of measurement units
MD150A process display enables converting the sensor signal into values in measurement units
specific for a given sensor. This allows for indication of e.g. measurement value in meter for distance
meter, inclination for inclinometer or pressure in bar for pressure sensor.
Four parameters are used for configuration of units:
6. U-LO –minimum value of signal from the sensor (0...10V or 0...20mA)
7. U-HI –maximum value of signal from the sensor (0...10V or 0...20mA)
8. P-LO –minimum measurement value displayed by the process display
9. P-HI –maximum measurement value displayed by the process display
Example 1) For draw wire sensor with 4-20mA output and range 0-10m, in order to display its result
in meters you should enter the following parameters: U-LO = 4.00 U-HI = 20.00 P-LO = 0 P-HI =
10.00 , and parameter INPUT -> 0-20mA.
Example 2) For analogue inclinometer with 2.5-5V output and range -20deg - +20deg, in order to
display the result in degrees you should enter the following parameters: U-LO = 2.50 U-HI = 5.00 P-
LO = -20.0 P-HI = 20.00 , and parameter 5.INPUT -> 0-10V
