Dwyer Instruments TSXT Series Specifications-Installation And Operating Instructions Download Page 2

Parameter Programming 

Note: 

Set Point and the time programming are the only parameters accessible without 

access code.

Set Point

•  Press SET. Set Point value will appear on the display.

•  Press SET again. The real value is shown on the display and can be modified with

  the UP and DOWN arrows.

•  Press SET to confirm any new values.

•  Press SET and DOWN simultaneously to quit programming or wait one minute for

  the display to automatically exit programming mode.

Real Time Clock

•  Press SET. The Set Point value will appear on the display.

•  Press the UP or DOWN arrow to change to Hour or Minute.

•  Press SET to see the assigned value.

•  Use the UP and DOWN arrows to set the desired value.

•  Press and hold SET for 8 seconds to program value. The word “Pro” should appear 

  on the screen if the value has been programmed correctly.

•  Press SET and DOWN simultaneously to exit or wait for the timeout.

Protected Parameters

•  Press and hold SET for 8 seconds. The access code value 00 is shown on the 

 display.

•  Using the UP and DOWN arrows, set the code (factory-set code is 00).

•  Press SET to enter the code. If correct, the first parameter label will be shown on 

  the display (SP).

•  Use the UP and DOWN arrows to move to desired parameter and SET to view 

  parameter value.

•  While viewing a parameter value, use the UP and DOWN arrows to modify parameter 

  value. Use SET to enter value and exit parameter. 

•  The display will blink when there is an error recording a parameter in memory or 

  when awaiting confirmation of a value.

•  Press SET and DOWN simultaneously to quit programming or wait one minute to

  automatically exit programming mode.

LED Indication and Display Messages

      : 

Indicates if the load is connected. If continuous cool cycle is being 

   

performed, this LED flashes (90% ON, 10% OFF). If the unit is waiting the 

   

stopping time value stored in c0 to start a cool cycle the LED flashes (10% 

   

ON, 90% OFF).

      : 

Indicates if defrosting is active.  

      : 

Indicates an active alarm. The LED will flash if the alarm is cleared, but the 

   

alarm condition persists.

      : 

Indicates when fan control relay is active. Either H7 or H8 must be set to 

   

one of the fan control modes (FAN or FAI).

HACCP:  Indicates HACCP alarm recording feature is active.

  

If an alarm or error occurs, the following messages will be shown and an internal 

buzzer will sound. 

The  alarm  can  be  cleared  and  buzzer  silenced  by  pressing  the  SET  and  DOWN 

buttons simultaneously. The alarm message will not be shown, but the alarm LED will 

flash while the alarm condition persists.

Err =

 Memory error

ErP1 =

 Probe 1 error

ErP2 =

 Probe 2 error

ErP3 =

 Probe 3 error

Eri =

 Internal parameter error. In this case enter the factory default configuration, as 

described in the Resetting to Factory Defaults section.

ALH =

 High temperature alarm

ALL =

 Low temperature alarm

ALE =

 External alarm

AEH =

 High temperature and external alarm

AEL =

 Low temperature and external alarm

ooo =

 Open probe error

- - - =

 Short circuit probe error

DON =

 Defrosting activated

DOF =

 Defrosting deactivated or cannot be done

CON =

 Continuous cold cycle activated

COF =

 Continuous cold cycle deactivated

-d- =

 Defrosting (when d5 set to -d-)

Setting Keyboard Code to Zero

•  Turn unit off and back on. Press and hold SET for 8 seconds. Value 00 should flash 

  on the display.

•  Set the code to 123 using the UP and DOWN arrows.

•  Press SET to confirm the code. The code is now set to 00.

Activating and Deactivating Manual Defrost Cycle

Press and hold the AUX button for 2 seconds to activate defrosting. Repeat this 

process to stop the defrosting. If a cool cycle is activated, the defrosting is disabled.

Activating and Deactivating Cool Cycle

Press and hold the DOWN arrow for 8 seconds to activate a continuous cool cycle. 

Repeat this process to stop the cool cycle. If defrosting is activated, the cool cycle is 

disabled.

Fault Cycle

If the probe fails, the load is connected for the time set in c2 and then disconnected 

for the time set in c3.

In case of memory error, the load is connected for 5 minutes and then disconnected 

for 5 minutes.

On/Off Mode

This option is used to turn the control into an OFF or stand by mode, disabling the 

display and outputs.

•  Press and hold SET and DOWN for 8 seconds. The display will read OFF.

•  Press and hold SET and DOWN for 8 seconds to return the control to normal 

 operation.

On/Off Light

The 2nd or 3rd relay can be configured as a lighting switch by setting the H7 or H8 

parameter to Li. To activate or deactive the light relay, press and hold AUX and UP for 

3 seconds.

Probe View

To view the probe not chosen in P5, press the SET and UP buttons.

HACCP

If this option is activated, the thermostat registers up to 5 high, low, and power loss 

alarms. These alarms can be seen in the menu Registry of Alarms (HAC). To access 

this menu, proceed to the parameters menu. 

The first value (nAt) that appears is the number of registered alarms. Next, the value 

of the temperature (Adx) and the time of each alarm that exists (tdx) are displayed. For 

the disconnection alarm, the temperature when returning the connection is registered, 

as well as the time until the correct value is reached. (Probe<Set+A1-A0)

When the elapsed time is shown it will appear dxx (days). Pressing UP, hxx (Hours) 

will be shown, and pressing UP again, nxx (Minutes) will be displayed. When located 

over a temperature of alarm or time, pressing AUX + UP for 3 seconds, both recorded 

data of the alarm (time and temperature value) are deleted.

In the HAC menu, pressing AUX + UP keys for 3 seconds, all the recorded alarm data 

is deleted.

Resetting to Factory Defaults

•  Access to parameter H0 as explained in parameter programming.

•  Choose desired configuration.

•  For Series TSXT-xx1: H0 is set to 0

•  For Series TSXT-xx2: H0 is set to 1

•  For Series TSXT-xx3: H0 is set to 2

•  Press SET for 8 seconds, and the thermostat will be reset.

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