Hart Configuration - Honeywell STT25D Operator's Manual

Operating card (34-ST-11-16) included with the STS103 covers the smart transmitter
functions included in the STT250 (e.g. damping, calibration, output mode etc.). Since
the SFC is a universal configuration tool for a wide range of Honeywell transmitters,
some proposed menu items are not possible with the STT250, as listed in Section
3.2.3. In this case, the download will result in an "invalid request" response.
Additional configuration notes:
1. This series mode filter should match the local AC supply frequency. It is set to 60
Hz for United States and to 50 Hz for other countries.
2. Sensor fault detection "ON" will drive the output upscale or downscale as selected
in the event of an open input condition or in response to most electronic
malfunctions. Sensor fault detection "OFF" will give an indeterminate output with
an open input condition.
3. O/P linear will always read in degrees (C, F, R or K, as selected) for T/C and RTD
inputs. O/P non linear will read in milli-volts for T/C inputs and in ohms for RTD
inputs.
4.5.3

HART Configuration

1. Turn on the power supply and the HART Communicator.
2. On power up, the communicator will display "Self Test in Progess", verify proper
operation and display "STT250 Temp: xxxxxxxxxx" (xxxxxxxxxx represents the
tag) and "On-line".
The process value, output current, LRV and URV are displayed a few seconds
later.
NOTE : Even though the transmitter is working properly, the HART Communicator may
display "Sensor failure".
- Press "NEXT". "Sensor 1 failed" is displayed.
- Press "NEXT" again. "Ignore next 50 occurrences of status " is displayed.
- Confirm with "YES" to correct the problem.
The cause is probably one of the following:
⇒ You have not connected a sensor to the input.
⇒ There is an open circuit in the sensor, connecting wiring or terminal connections.
⇒ You have connected a T/C or other milli-volt source to the T/C terminals and the
transmitter is configured for RTD input (or vice versa).
3. Press è to select "Device setup" menu.
4. Then use ê to highlight the "Basic setup" followed by è to access the
transmitter database and configure it as required.
As mentioned earlier, the default shipping mode for units is 0-45mV input,
0-45 mV range.
You can now customize the unit to your specific application. The flow chart in Figure 5
gives a simplified overview of selections and key strokes.
In summary:
12 Smart Temperature Transmitter STT250 – Operator Manual
- pressing è selects a menu,
- pressing é or ê accesses the selections of any
category,
- pressing ç steps back to the previous menu.