Switching On The Transmitter; Enabling Configuration - Endress+Hauser OTMT84 Bedienungsanleitung

Operation and commissioning
5.5

Switching on the transmitter

Once the final checks have been successfully completed, it is time to switch on the supply
voltage. The transmitter performs a number of internal test functions after power-up. As this
procedure progresses, the following sequence of messages appears on the display:
Step Display
1 Display name and software (SW) and hardware (HW) version
2 Company logo
3a Device name as well as the SW, HW and device release of the transmitter
3b Displays sensor configuration
4a Current measured value or
4b Current status message
If the switch-on procedure fails, the appropriate status message is displayed, depending on the cause. A
detailed list of the status messages, as well as the measures for troubleshooting, can be found in the
Operating Instructions.
The device begins normal operation after approx. 8 seconds, the attached display after
approx. 12 seconds. Normal measuring mode commences as soon as the switch-on procedure is
completed. Various measured values and/or status values appear on the display.
For a more detailed temperature transmitter configuration description and further information,
please refer to the Operating Instructions.
5.6

Enabling configuration

If the device is locked and the parameter settings cannot be changed, it must first be enabled via
the hardware or software lock. The device is write-protected if the keyhole symbol appears in
the header of the measured value display.
To unlock the device
• either switch the write protection switch on the back of the display to the "OFF" position
(hardware write protection), → Page 38 or
• deactivate the software write protection via the operating tool.
When hardware write protection is active (write protection switch on the back of the
display to the "ON" position), write protection cannot be disabled via the operating
tool. Hardware write protection must always be disabled before software write
protection can be enabled or disabled.
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Dual-input temperature transmitter