SMART Temperature Transmitter
PTT74-Ex Series User Manual
Sep.2020
11
www.faraboard .com
FAHM Co
.
Industrial Automation
Doc. PTT74-ExRev99/07M
3.
Configuration
3.1
LCD display
The LCD indicator connects directly to the interface board which maintains direct access to
the signal terminals. It can display the digital temperature, custom variable which is
proportional with measured temperature, 0-100% analog indication and abbreviated
diagnostic messages. A display cover is provided to accommodate the display. The LCD
display features a three-line display. The first line displays three characters related to
measured parameter. The first character of the first line is <P> related to programing mode
. The second character of first line is <SP> related to set point indication if transmitter be
used as controller .The last character is <FIX>. This character is on when the output current
of transmitter forced to fixed value via hart device or due to use of transmitter in multi-drop
mode. The second line displays the actual measured value of temperature and its sign. The
third line displays the engineering unit for indicated variable. A speed meter located in
above section of the first line displayed the percentage of measured temperature. The LCD
display is shown in
3.2
Device setup
For configuration and tuning the parameters, three key buttons exist on the indicator. The
key button characterized by <M> is located in above of LCD display and two key buttons
located in the bottom of LCD which characterized by <Z> and <S> signs.
In normal operation LCD shows the desired variable and/or percent range of output signal.
In this mode you can use <M> key to access menu list. In normal operation mode if you
press and hold the <Z> key between 3 to 10 seconds you can set the current value of applied
temperature as low range (LRV) of transmitter and if you press and hold the <S> key
between 3 to 10 seconds you can set the current value of applied temperature as high range
(HRV) of transmitter.
Figure 13 LCD Display
