SMART Temperature Transmitter
PTT74-Ex Series User Manual
Sep.2020
17
www.faraboard .com
FAHM Co
.
Industrial Automation
Doc. PTT74-ExRev99/07M
3.2.4
Analog Output Parameters
The output signal of transmitter is a 4-20mA current which in normal condition represents
the current value of primary variable. If the value of primary variable be out of range or the
device conclude that there is a fault in electronic boards or sensor element that takes the
device into mal-function mode, the output signal will represent the alarm condition.
User can simulate and/or trim the output signal using CUR and CTR menu items.
parameter
display
Parameter tuning structure
Alarm
(setting alarm for
over range, under
range or holding the
last value)
Press <M> until this page is appeared on LCD. Then press
<Z> to access the Alarm parameters (programing mode).
You can set the alarm for over range (high) and under
range (low) or maintain the last value (Last) by pressing
<S>. After that, press <Z> until all characters blink. Then
press <M> for the saving new parameter and switching
from programing mode to operation mode.
Test/Trim
Current
(Simulate the
output current to fix
value and/or trim
the current)
Press <M> until this page is appeared on LCD. Then press
<Z> to access the test current value (programing mode).
You can change the amount of digits by <S> and change
the point and position of digits by <Z>. After tuning this
parameter, press the <Z> until all characters blink. Then
press <M> for apply this value to as output current. By
pressing <M> display module go to trimming mode. You
can enter the actual value which you read via series
multi-meter and press <M> key to save new parameter
and switching from programing mode to operation
mode.
In any state to exit from simulating current mode you
can enter zero value as test current value or restart the
transmitter.
3.2.5
Communication Parameters
PTT74-Ex Series transmitter supports Hart multi-drop mode. To identify the device ID in this
mode, user can use the POLL ID menu.
parameter
display
Parameter tuning structure
Hart Protocol
Poll ID
(configuring
identification
number of device in
hart multi-drop bus)
Press <M> until this page is appeared on LCD. Then press
<Z> to access the Poll ID parameter (programing mode).
You can select the device identifier by pressing <S>.
After that, press <Z> until all characters blink. Then press
<M> for the saving new parameter and switching from
programing mode to operation mode.
