Varec, Inc. 111
Chapter 8
Mark/Space
After the 2920 FTT is mounted and wired, it must be calibrated or configured to operate
efficiently and effectively. This chapter contains information about configuring the Mark/
Space communication protocol, including the following:
• Setting the Transmission Speed
• Setting Encoder Type
• Setting the Data Format
• Setting the Temperature Offset Mode
Basic Parameters
The 2920 FTT requires the setting of several Basic Parameters to enable it to operate in your
particular environment. These parameters are:
• Unit Addr
• Encoder Direction
• Level Display Units
• RTD Type
• Temp Display Units
• Calibration Level
• Control
All these parameters are located in the Basic Setup menu. The procedure below details the
steps to set the Unit Addr and can be used to set other Basic parameters by substituting the
appropriate parameter name for Unit Addr. Of course, the number of times you press Minus
or Plus to access a parameter will be different.
Note The units for transmitting the level and temperature must match the configuration
of the host system. However, the units selected to display the level and temperature on
the LCD can be different than the units used for data transmission. The Lev Disp Units and
Temp Disp Units parameters determine the units used by the LCD display. The Type and
Data Format parameters determine the format of the units transmitted to the host system.
To Set the Unit Address
1. Press Enter to open the Main Menu.
2. Press Minus one time to select the Basic Setup menu.
3. Press Enter to open the Basic Setup menu.
4. Press Minus one time to select the Config Params menu.
5. Press Enter to open the Config Params menu.
6. Press Minus or Plus to locate the Unit Addr parameter.
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