Operating Manual
Chapter 8 Serial Ports, Contact Inputs & Special Fcts Accu-Wave 
8-20 TN Technologies 
“Special functions” Menu (cont.) 
Display  Comments 
Do not enable user 
defined (UD) units. 
Change to “Do”→→ 
Continue as is.↓↓ 
Change to “Do” to enable user defined units option in 
the various “Select Units” menu items. 
Note: Enabling the “Service only items” causes additional items to show up in 
various “Radar Fine Tuning” submenus as well as in other setup menus. 
Do not enable 
service only items. 
Change to “Do”→→ 
Continue as is.↓↓ 
Causes additional “service only” setup items to show 
up in several areas. Default condition is “do not.” 
Do enable 
serial dump items. 
Change to “Do not”→→ 
Continue as is.↓↓ 
Change to “Do not” to disable commands to dump 
and retrieve setup data via the serial ports. See “Serial 
Port Related Action Items” on page 7-6. 
Special span entries 
Level→→ 
 NEXT↓↓ 
Submenu allowing the current output span for the 
primary measurement (Meas 1 reading for current 
output max/min) to be changed, overriding span 
defined by entries in the primary setup section. 
Assign commands 
to blind keys 
 NEXT↓↓ 
Submenu to assign commands to the eight hidden 
keys on the transmitter keypad and to specify whether 
command prompt is displayed when hidden key is 
pressed. Default is no prompt, assigned command is 
executed when hidden key is pressed. 
Set up custom units 
messages→→ 
 NEXT↓↓ 
Submenu group to set up custom messages. See the 
next section for details. 
Setting up Custom Units Messages 
User entered messages can be used to redefine units and to provide headers for serial data. 
For example, suppose display scaling has been used to scale the tank volume readout by a 
factor of 1000, that is, 10,000 cu ft is displayed as 10 cu ft. You could set up a custom 
message of “K_CU_FT” and then select that message to be displayed for the volume units. 
The system supports up to 8 custom (user defined) messages strings of up to 10 characters 
each. Custom message menus are found in the “Special functions” menu described in the 
previous section, as well as in the “Set up data format” submenu of the “Set up port … 
data transmission” menu, see page 8-12. This menu option is also displayed when you 
enable display scaling (see page 4-8).  










