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SMART UNIVERSAL TEMP. TRANSMITTER SERIES: SEM215

SMART UNIVERSAL TEMP. TRANSMITTER SERIES: SEM215
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SMART UNIVERSAL TEMP. TRANSMITTER SERIES: SEM215 - 1

Smart Universal Temperature Transmitter >- THERMOCOUPLE, RTD, mV & SLIDE-WIRE INPUTS >► INPUT/OUTPUT GALVANIC ALLY ISOLATED >► FIELD RANGE SELECTABLE >► COMPACT SIZE & FAST WIRING >► FLAMMABLE ATMOSPHERE COMPATIBLE (OPTION) The SEM215 Series Rail-mounted Universal Temperature Transmitters provide accurate and reproducible conversion of any commonly used thermocouple sensors, Pt-100 RTDs, slide-wire transducer or mV signals to isolated industry standard 4-20 mA output. The versatility of this smart temperature transmitter results in lower stock holdings and greater operational flexibility. Isolation is a standard feature, removing all ground loop effects as the input is electrically and physically isolated from the loop powersupply. The transmitter can easily be configured in the field by setting the positions of eight switches located close to the rail clip. Six switches are available to provide 57 pre-set ranges, one switch is for unit selection and the last switch will be used to specify the burnout option. These switches are inaccessible in normal use to prevent tampering. Configuration can also be performed via a personal computer. The sensor type, range, filter factor, linearisation scheme, temperature offset and the device tag are easily programmed using a PC and a simple Windows© based software program. This allows for reprogramming or interrogation of the transmitter, while it is installed in the loop. Sensors can be changed without the need for recalibration. Special sensors can be accommodated by using the type "X" element, which allows any custom characterization and linearisation option. Sensor referencing enables the transmitter to be accurately matched to a particular sensor. A user programmable offset is available to remove any system error or to shift the temperature reading in either direction. Four selectable settings have been provided to remove any incoming noise The transmitter is very compact enabling a high packing density to be achieved and by using the latest tension clamp technology for the two part terminals, connections are made in half the time taken to wire conventional screw terminals. These terminations are maintenance-free and the tension clamp ensures that the contact is permanently under tension, eliminating any potential problem of loosening due to temperature fluctuations or vibration. In normal operation the current output varies between 4 and 20 mA. If the input sensor develops a fault, or the software in either of the two microprocessors detects an error, then the current output is driven either upscale (greater than 20 mA) or downscale (less than 4 mA) depending upon the sense of the burnout microprocessors results in error-free data transmission across the isolation barriers. The transmitter is protected against reverse connection, so that incorrect output wiring results in near zero current flow in the loop.

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SMART UNIVERSAL TEMP. TRANSMITTER SERIES: SEM215 - 2

Sensor Range Excitation Current Lead Resist. Effect 0.002°C / Q Thermocouple Input Thermocouple Types Cold Junction Error Cold Junction Range Millivolt Input Input Range Input Impedance Slide-wire Input Resistance Range Output Range Supply Voltage Voltage Effect Thermal Drift order polynomial) order polynomial) Reverse connection; Update Time Burnout Action Hazardous Ares Data Rate Cable Length Sensor type, Burnout option and °C/°F configurable both User offset via PC only Accuracy includes the effects of calibration, Any span may be selected, but standard accuracy is only applicable to...

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