ROTRONIC MBW 973 - Manual (Page 24)

20 System Configuration
Analog Outputs
If this option is installed, the 973 is equipped with at least two analog outputs that are
independently configurable. For each of the analog outputs, you may easily select which
parameter to track and how to scale the selected parameter to the analog output range. These
selections are made for each of the analog outputs via the Analog Outputs menu.
1. Access the Analog Outputs menu with the menu selection key discussed in the Menu Keys
section on page 4.
2. To access the selections for the first analog output, press the ‘Analog Output 1’ key. This
brings up the appropriate analog output configuration window.
3. Make necessary changes as identified in Selecting Which Parameter to Track and Scaling
the Output to the Data below.
4. Follow the same procedures for the second or any subsequent analog outputs as needed.
Selecting Which Parameter to Track
With the appropriate analog configuration window displayed, you may select which parameter to
attach to that analog output. The parameter is identified as a number in the Parameter field of
the window. Using the following list as a guide, change the parameter field to the number
indicated.
For this parameter
Units
Enter this
number
Dew Point [°C] 0
Frost Point [°C] 1
RH [%] 2
RH WMO [%] 3
Volume Ratio [PPMv] 4
Weight Ratio [PPMw] 5
SF6 Volume (available on SF6 only) [%] 6
Absolute Humidity [g/m
3
] 7
Specific Humidity [g/kg] 8
Vapor Pressure [Pa] 9
Atmospheric Pressure (available only
when equipped with high accuracy
barometer option)
[Pa abs] 10
Head Pressure [Pa abs] 11
Relative Head Pressure (not available
on 973)
[Pa] 12
Flow Rate [l/min] 13
External Temperature [°C] 14
Head Temperature [°C] 15
As an example, suppose that you wish to have %RH output as an analog voltage. Since %RH
is identified as parameter 2 in the list, enter the number 2 into the parameter field of the analog
configuration window.