ThermoProbe TL2 - Manual (Page 6)

6
02/2013, JK
Temperature controlled Relay
(AC powered unit only)
:
The TL2 comes equipped with a switchable relay. This relay will toggle whenever the temperature crosses the set point threshold set
through the user menu. The provided screw-terminal header can be wired in two configurations:
•
Terminals 1-2 are normally closed (NC) and will turn OFF (open) when the relay is set.
•
Terminals 1-3 are normally open (NO) and will turn ON (close) when the relay is set.
Figure 1: Relay screw-terminal header
The relay function can be implemented from the user menu. For the relay function to be active, the user must select ‘EnAbLE’ from
the relay menu. Also from the relay menu, the temperature set point can be configured. (‘rELAY’ -> ‘SEt’) Use the Up & Down
buttons to select the desired setpoint. Ensure this setpoint is correct before selecting the ‘EnAbLE’ function. The relay set point will
remain the same regardless of the unit selection (C, F or K).
Once the relay has been toggled, it will remain in that state until the user disables it using the Select button. If desired, the user will
then need to re-enable the relay from the user menu.
Zero Correction
Over time, a sensor may experience a shift in temperature at different ranges of the instrument. Zero correction allows the user to
make an adjustment to the current channel temperature display that effectively corrects for this shift. This offset or ‘zero correction’
is applied to the entire effective range of the instrument. Each channel has its own zero correction.
NOTE: A zero correction made at a particular point may not correct the temperature at another point. It is recommended that the
instrument be fully calibrated annually to maintain acceptable temperature tolerances for the range of the instrument.
To view the zero correction for the current channel, select the “Corr” option from the menu.
To set a zero correction:
1. Use the function and arrow buttons to navigate to the “Corr” item in the menu. Press and hold the power button. While holding the
power button, press the function button until the "Adj" menu item appears. Release both buttons.
2. Press and release the function button again. The double arrows will flash indicating that you are in zero correction mode. Use the
up and down arrows to adjust the display temperature as desired. The adjustment will only apply to the channel on the display.
3. When you've adjusted the display, press and release the function button. Use the arrow buttons and the function button to save or
cancel the zero correction and exit zero correction mode.
4. To view the zero correction, use the function button and arrow buttons to navigate to the Corr menu item as before. This time,
press and release the function button. The display will show the zero correction for the selected channel and then return to
temperature display mode.
5. To save the zero correction, the Power Button must be pressed. This will set the unit to ‘Standby’.