Rosemount 248 temperature monitoring assembly design meets temperature monitoring application requirements.This top-mounted transmitter with HART® protocol can be ordered with a variety of sensors, top junction boxes and thermowells. All of these products use Rosemount product designs that provide accurate, reliable readings.
1, improve the accuracy of temperature measurement / overall performance
a, the transmitter in accordance with the sensor's actual curve fine-tune the internal temperature curve, can greatly reduce the sensor interchangeability error (up to 75%); 644H and 644R type intelligent temperature transmission - Transmitter and Sensor Matching, Matching Functions 3144 and 3244MV Smart Temperature Transmitters - Transmitter and Sensor Matching Functions
b, Thermocouple Measurements, the Transmitter Converts Millivolt Signals to Noisy Noise Sensitive 4-20mA signal to improve the ability of anti-jamming, and greatly reduce the length of the compensation wire;
c, eliminate the cold junction compensation error of the thermocouple;
244EH and 244ER PC programmable temperature transmission, 644H and 644R type intelligent temperature change The transmitter, and 3144 and 3244MV intelligent temperature transmitters, all have automatic cold
junctioncompensation function. The 3244MV intelligent temperature transmitter has a temperature difference measurement function. The temperature difference measurement accuracy is better than using two transmitters to measure and send. The method of calculating the temperature difference after DCS (or sending the signals of two sensors directly to DCS) is several times more accurate.
2. Installation is more convenient
a. After the transmitter is used, all the cables are the same. It iseasierfor the ordinary copper wire
b and stretched copper cable than the compensation wire for stretching the thermocouple.
c. The wiring of the cable is easier. Special rules for opening the power supply
3. More flexibility
a. When using a temperature transmitter, the temperature measurement is a 4-20mA signal as measured by other processes (eg pressure, level, flow). The DCS can use the same I/. O card
b, temperature input can be combined with the input of other transmitters without the need to configure dedicated I/O cards for thermocouples and RTDs
4, reduce the overall cost of installation, maintenance and operation
a, copper cable is cheaper than thermocouple compensation wire
, use copper cable, no separate cable rack and conduit, which means lower installation costs
c, DCS I /O card type is the same, reduce the number of cards and the number of unused terminals
d, intelligent transmitter has a diagnostic function, can detect and determine the sensor failure or process alarm, thus reducing the number of maintenance to the site, which means With great maintenance savings
e, better temperature measurement performance, can increase productivity, means a lot of production savings