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Bulletin #272391-A 11/5/13 

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UDS7-BX Supplemental Programming Instructions 

 
The entire programming of the UDS7-BX Electronic Pressure Switch can be done using three buttons on the face of the unit.  
The M is Menu. The Up and Down arrows are used to scroll through the possible menu selections.  This manual guides the 
user in programming this unit. 
 
Connect the unit to power before beginning. 
 
If the unit is locked, “LOH”  will appear when trying to change any settings. Press and hold both arrow keys at the same time 
for approximately 5 seconds. This will unlock unit and allow for settings to be changed. Repeat to toggle back into a locked 
state. 
 

Read Actual Measured Value: 

The ACT menu is available to read the actual value regardless of what parameter has been selected above.  From the Menu, 
scroll down to ACT, and press M.  The actual pressure will be displayed.  To exit this mode, press M again. 
 
 

Selecting the Units of measure for the above displayed value: 

There are five choices of units: 
 

“PSI” – Pounds per square inch (psi) 

 

“PSH” – PSI/10 

(Use for high pressures since the display has a max of 3 characters)

 

“bar” – BAR 
“nbar” – Millibar 
“hPo” – Hectopascal 
“nPo” – Millipascal 
 

To select the units, Press “M” to access menu.  Using the down arrow, scroll to “S 1”.  Press “M” to select programming units.  
Using arrows, scroll thru selections above.  When you see the selection you want, press “M”.  For example, to display the 
value in PSI, scroll to “PSI” and press “M”.  To exit programming, use the arrows to scroll back up to “MENU” and press 
“M”. 

 

NOTE: 

Changing the units of measure does not change the set point values.  Therefore, the user must convert each set 

point and reprogram the UDS7-BX when units of measure are changed. 

 

MENU 

ACT 

S 1 

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Summary of Contents for UDS7-BX

Page 1: ...at parameter has been selected above From the Menu scroll down to ACT and press M The actual pressure will be displayed To exit this mode press M again Selecting the Units of measure for the above dis...

Page 2: ...nt dr1 For example in a system where the pressure changes rapidly the user may choose to introduce a delay of anywhere from 0 to 9 9 seconds Zero would imply no delay This menu also allows inversion l...

Page 3: ...e inversion menu to set the fail safe mode Using the down arrow the user can toggle between HFS high fail safe or normally open and LFS low fail safe or normally closed Scroll to HFS and press M to se...

Page 4: ...turn off when pressure is above 500 psi S1off Again to reverse the normally open function change the inversion selection to LFS and the LED will turn off at 400 and back on at 500 psi Setting Switch P...

Page 5: ...set points and ON outside of them For simplicity of understanding it is suggested that the high limit be used for on1 and the low limit be used for OF1 In the above configuration the S1 LED will light...

Page 6: ...e 400 to 500 psi range Setting Switch Point 2 The function and programming of the second switch point SP2 is identical to SP1 The parameters for switch point 2 are SP2 on2 OF2 dS2 dr2 and lu2 Since th...

Page 7: ...to get to MENU and press M to exit the programming menu The maximum pressures can be cleared from the UDS7 BX memory to enable monitoring of a NEW high in the system To clear the high pressure readin...

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