Meriam M1500 Digital Pressure Transmitter - Manual (Page 14)

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Configuration Using Meriam Setup Utility Configuration Using Meriam Setup Utility Configuration Using Meriam Setup Utility Configuration Using Meriam Setup Utility
The Meriam Setup Utility application is used to configure the analog output as well as the digital outputs of the
M1500. The image below is the analog setup dialog box from the program.
Analog Setup Screen from Meriam Setup Utility
The Pressure groupbox displays the upper and lower sensor limits (LSL/USL), current pressure reading, upper and
lower range values (LRV/URV), minimum span for the range and a Zero button. The sensor limits are fixed values
which are factory set. The sensor range values are user configurable parameters which must meet the minimum span
requirement. The minimum span is specified as 25% of the sensor limit delta. In addition, URV must be greater than
LRV. The zero button allows the user the zero the sensor at the current pressure measurement.
The Output groupbox contains the output type and range selections. The Volts and Current radio buttons allow the
user to select the output type. The AO@LRV and AO@URV edit fields scale the voltage or current output signal to
the pressure input range.
The Transmitter Alarm groupbox contains a selection button for enabling or disabling an alarm when the pressure
sensor has reached its hard over/under range limits. This occurs when the sensor can no longer compute a pressure
measurement. When enabled and an alarm is detected, the output will go to 22.5mA when in current mode. In voltage
mode, the output will go to 5.1V when the alarm condition is detected.
The Digital Output groupboxes allow the user to configure the parameters associated with Digital Output 1 & 2. These
include the Output action (Closed, Open or Inactive), Value setpoint(s), Comparison type (Between, Greater Than,
etc
) and Reset Deadband. The Value setpoint(s) and comparison type work together to establish the trigger points
for the digital outputs. The Reset Deadband determines the amount of hysteresis around the Value setpoint(s) to
eliminate continuous toggling of the digital outputs at the trigger points. The minimum Reset Deadband is 0.5% of the
sensor limit range (USL - LSL). If there are two setpoints, the maximum Reset Deadband is half of difference between
them (Upper Value – Lower Value).
Notes:
The user parameters (pressure) are entered in engineering units of the measurement module.
All user parameters entered are validated by the Meriam Setup Utility.