Loop Powered Indicator With Data Logging, Alarm & Message Display DM650/LP
Loop Powered Indicator With Data Logging, Alarm & Message Display
- (4 to 20) mA LOOP POWERED
- CAN BE USED AS A LOOP POWERED PROCESS SWITCH
- USE ON TOP OF TEMPERATURE PROBE OR SURFACE MOUNTED
- USB AND NFC INTERFACE
- BATTERY BACKUP
- 5000 POINT DATA LOGGER
- ABS PLASTIC, STAINLESS OR ALUMINIUM HOUSING
The DM650LP loop powered process switch and indicator, accepts a (4 to 20) mA signal and displays the process value in the appropriate engineering units on a 6-digit LCD display. The instrument offers an advanced display mode allowing the user to also display one or two (1 to 32) character messages.
Additional to the messages, the user may select an alert event to occur when the temperature is within a band. The change-over relay can be used together with the messaging and alert to provide switching at user set switch points. This means the instruments can be used as a loop powered process switch depending on which type of process the (4 to 20) mA loop is measuring. For example temperature or pressure.
In addition to this, an on board datalog function is also available to record process details at up to 5000 points. In this case a battery needs to be fitted so the log can continue to be monitored in case of loop failure. The battery life is dependent on the number of active features such as the alert LED and logging options. Battery life 2-year minimum (longer depending on options selected).
LOOP POWERED The instrument is powered by the loop current. A single AA 3.6V lithium battery is also fitted to allow display function and datalogging to continue on mA loop current loss. This is useful for displaying error messages and maintains the log function, allowing the user to determine the loop loss period.
RELAY TRIP The instrument is equipped with a volt-free changeover-type relay. The user may select one of several actions, including deviation operation, with adjustable set point and hysteresis. The Relay may be turned off if not required. An option is provided to trigger a display alert-event when the relay contact is on.
DATA LOGGING FUNCTION DM650LP also provides a powerful data logging function. The number of log points can be set up to 5000; each point is time and date-stamped together with input process value (PV) and relay state information. The log rate is selectable in steps. The start of log can be delayed if required. Either fixed or rolling logs may be performed.
Two methods of reading the log are available. USB interfaced software reads the log and allows the user to save to a text file for export to other programmes. The NFC android interface allows data transfer to compatible android phones or tablets by using the downloadable App. The data can be graphed and forwarded by email, Bluetooth etc. The NFC interface is also capable of starting a new log with different log period and modes via the Android app.
TEMPERATURE TRANSMITTER COMPATIBLE As well as working with any (4 to 20) mA signal the DM650LP has space inside its housing to mount a Status Instruments (4 to 20) mA temperature transmitter. Temperature transmitters can be used with the DM650LP in the SCH4 housing to give a local temperature display.