Monitoring & metering
SIL 3 CAPABLE STZ FOR SAFETY-RELATED APPLICATIONS
Figure 2. Multi-dropping several Smart HART transmitters onto a single digital data link saves time and money. Utilising THZ3 or TDZ3 transmitters with dual inputs allows for cost-effective monitoring of several temperature points on one HART input channel.
DEVICE INTELLIGENCE FOR SMARTER MONITORING AND CONTROL The THZ3 and TDZ3 come with Device Intelligence, a series of features for smarter control and monitoring including:
Sensor drift and corrosion detection that checks and alerts users when the sensor is drifting out of a preset range or when the resistance due to corrosion exceeds set parameters.
Smart range alarms with four HART alarms - set to any input or calculated input - that detect when the variable is within or outside of user preset limits.
A High Availability option that enables the selection of how the AO behaves when there is an input failure or out-of- range value detected by the transmitter. This prevents nuisance alarms on startups or batch process shutdowns.
Input simulation capability allowing manual input of a direct or calculated value. This essentially simulates a real input, allowing users to test the AO or any HART diagnostic and range alarms.
DEPENDABILITY AND ACCURACY Users can rely on the accuracy and dependability of the THZ3 and TDZ3. Their input-to-output analog accuracy of up to ±0.014°C (±0.025°F) utilising sensor matching and trimming over a 100°F span is the absolute best in the industry. The transmitters feature 20-bit input resolution and deliver exceptional input accuracy for all sensor types.
Plus, Moore Industries’ patented continuous sensor diagnostics feature can save you from costly lost production and hours of troubleshooting. Advanced RFI/EMI protection and ambient temperature
compensation guard against environmental factors that can quickly degrade measurement accuracy, while long-term stability provides up to five years between scheduled calibrations.
End users who need a dependable and accurate temperature transmitter for use in Safety Instrumented Systems (SIS) where dangerous processes occur can turn to the SIL 3-capable STZ Functional Safety Dual Input Smart HART Temperature Transmitters. Part of the FS FUNCTIONAL SAFETY SERIES, the STZ has been certified by exida after rigorous evaluation to ensure conformance with strict IEC 61508:2010 standards for safety-related applications. As with the THZ3 and TDZ3, the STZ has a dual sensor input that provides Backup and Failover Protection to reduce process interruptions. For example, temperature is often a critical measurement in reactors, especially processes with potential thermal runaways due to exothermic reactions. Utilising the failover/backup feature with dual sensor input on the STZ can help a Safety Instrumented System (SIS) mitigate potentially dangerous situations (See Figure 3). Discover Dual Input Temperature solutions from Moore Industries at
www.miinet.com/HART-Temperature
Moore Industries
www.miinet.com/HART- Temperature
Figure 3. Temperature is often a critical measurement in reactors, especially processes with potential thermal runaways due to exothermic reactions. Utilising the failover/backup feature with dual sensor input on the STZ can help Safety Instrumented Systems (SIS) mitigate potentially dangerous situations.
Instrumentation Monthly August 2023
47
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