Dwyer 3100MP User Manual
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5.4.1 Process Variable
There are two process variables in the 3100 Smart Pressure
Transmitter. The primary variable and temperature compensated
SV (Second Variable), the PV value outputs the 4~20mA analog
value.
5.5 Basic Setup
The correlation variable must be configured before operating the
transmitter.
5.5.1 Select Sensor Range
The pressure range must be selected when ordering the pressure
transmitter.
5.5.2 Set Output Units
Select from the following engineering units:
Volumetric Flow Unit:
CubicFeet/min, Gallons/min, Liters/min,
ImperialGallons/min, CubicMeter/hr, Ft/s, meters/s,
Gallons/s, mGallons/day, Liters/s, mLiters/day, CubicFeet/s,
CubicMeter/s, CubicMeter/day, ImperialGallons/hr,
ImperialGallons/day, NormalCubicMeter/hr, NormalLiter/hr,
StandardCubicFeet/min, CubicFeet/hr, CubicFeet/day,
CubicMeters/min, Barrels/s, Barrels/min, Barrels/hr,
Barrels/day, Gallons/hr, ImperialGallons/s, Liters/hr,
Gallons/day
Mass Flow
Grams/s, Grams/min, Grams/hr, Kilograms/s,
Kilograms/min, Kilograms/hr, Kilograms/day,
MetricTons/min, MetricTons/hr, MetricTons/day, Pounds/s,
Pounds/min, Pounds/hr, Pounds/day, ShortTons/min,
ShortTons/hr, ShortTons/day, LongTons/hr, LongTons/day
Pressure
kPa, mmH2O, InH2O, InHg, FtH2O, mmHg, psi, bar, mbar,
g/cm^2, Kg/cm^2, Pascals, MPa, torr, ATM
Miscellaneous
%
Time
Min, sec, hr, days
Mass
Grams, kilograms, metric tons, pounds, short tons, long
tons, ounce
Volume
Gallons, liters, imperial gallons, cubic meters, barrels,
bushels, cubic yards, cubic feet, cubic inches, bbl liq,
normal cubic meter, normal liter, standard cubic feet,
hectoliters
5.5.3 4-20mA Configuration
Set the Zero and Span for the 4~20mA analog output.
5.6 Detailed Setup
5.6.1 Set Fail Mode
When the sensor or microprocessor is not operating properly, the
transmitter will output 3.75mA or 21.75mA based on the Fail Mode
setting.
5.6.2 Set Dampening Time
The Dampening Seconds value changes the response time of the
transmitter to smooth out variations caused by rapid process
changes. Determine the appropriate dampening setting based on
the required response time, signal stability, and other
requirements of your system.
The Dampening Seconds can be set from 0-60 seconds; the
default dampening value is 1.0 second.
5.7 Configuration of Information Variable
5.7.1 Set Tag
Tags are an easy way to classify transmitters in multi
transmitter application. Tags can use 8 words/numbers.
5.7.2 Set Messages
When using several transmitters, the user can define each
transmitter by using 32 words/numbers. This message is saved in
EEPROM.
5.8 Diagnostics and Service
5.8.1 Loop Test
The Loop Test verifies the output of the transmitter, the integrity of
the loop, and the operations of any recorders or similar devices
installed in the loop. The following procedures are required for a
loop test.
•
Connect a reference meter to the transmitter.
•
Select the Loop Test on the HHT and operate the Loop
Test.
•
Select current output (4mA/20mA/etc.)
•
If the readings match, then the transmitter and the loop are
configured and functioning properly. If the readings do not
match, then you may have the current meter attached to the
wrong loop, there may be a fault in the wiring, the
transmitter may require an output trim, or the current meter
may be malfunctioning.