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Watlow MLS User Manual

Page 85

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Setup

MLS User’s Guide 73

The graph below shows pressure as an example.

Before you enter the values that determine the two points for the
conversion line, you must choose an appropriate display format. The
MLS has six characters available for process variable display; select the
setting with the desired number of decimal places before and after the
decimal point. Use a display format that matches the range and
resolution of the process variable. The display format you choose is
used for the setpoint, alarms, deadband, spread, and proportional band.

The PV (Process Variable) range for the scaled input is between the PV
values that correspond to the -16.6% and 100% input readings. This PV
range defines the limits for the setpoint and alarms, as shown here.

NOTE

See Linear Scaling Examples section in this manual.

Proce s s
Variable

Input Re ading

0 PS I

0%
0 mV
0 Hz

100%
60 mV
2000 Hz

Hi PV

Lo PV

Lo
RDG

Hi
RDG

}

Line ar input type

} Puls e input type

Range