Electro-Chemical Devices (ECD) T80 - Manual (Page 22)

3.0 OPERATION
The ECD Model T80 transmitter is an intelligent, single or dual
channel multi-parameter transmitter designed for the online
continuous measurement of pH, ORP, pION, conductivity, resistivity
or Dissolved Oxygen in a general purpose industrial environment.
The Model T80 transmitter digitally communicates with any ECD S80
digital sensor. The measurement identity is contained in the
sensor’s memory. When an S80 sensor is connected to the
transmitter it automatically configures the transmitter’s menus and
display screens to the measured parameter.
3.1 KEYS
The functions associated with each key are displayed on the screen, above the key for the Selection Adjustment
Keys and to the left of the key for the HOME and BACK keys. Press any Selection Adjustment key twice within
one second to enter the HOME Menu Screen.
3.1.1 H
OME
/E
XIT
K
EY
The HOME key performs two functions, it selects which Home Screen is displayed and it returns the active
screen to the HOME Menu Screen from anywhere inside the menu structure.
Three Display screens are available:
1. DATA SCREEN: Displays the measurement type, numerical value,
engineering Units, % Output of the 4-20 mA channel and temperature.
2. mV SCREEN: Displays the measurement type, the sensor’s raw millivolt
Value, % Output of the 4-20 mA channel and temperature.
3. GRAF SCREEN: Displays a Graphical representation of the 4-20 mA channel
% Output, the measurement type, the engineering units, and temperature.
Only one of the three graphical display styles is available through the HOME
key, either the Bar, Gauge or Line display. Choose which style will be
displayed in the Graph Menu. (pathway to Graph Menu: CONFIG → XMTR
→ LCD → Graph menu)
Each of the above screens also displays the condition of the optional Alarm Relays,
black if energized and white if de-energized.
The HOME key changes to the EXIT key in the HOME Menu Screen, pressing EXIT prompts the user to “Save
Changes” YES/NO when exiting the HOME Menu. YES applies any changes made in
the menus, NO exits the HOME Menu without applying any changes made in the
menus.
3.1.2 B
ACK
/H
OLD
K
EY
The BACK key changes the screen to the previously displayed screen when inside a
menu, it moves BACK one screen. On a dual channel transmitter it toggles between the PV1, PV2 and Dual
Channel Screens. The HOLD key toggles the output HOLD function ON/OFF in the MENU HOME screen.
Page 21 Model T80