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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’.
PC Software setup:
There is a PC driver file that is needed to connect the TL2-A to your PC. We have included a disc with the
driver software for Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008, Windows 7,
Windows Server 2008 R2. Other operating systems are supported and driver software is available.
Use the Windows Add Hardware Wizard and the driver files to set up a USB Com port to connect to the TL2-
A. Connect using HyperTerminal or other software that can connect interface with the selected Com port.
** The USB driver software web site is (
http://www.ftdichip.com/Drivers/VCP.htm
)
.
Note These instructions are taken from a document that is available online from Future Technology Devices International.
(http://www.ftdichip.com/Support/Documents/AppNotes/AN_104_FTDI_Drivers_Installation_Guide_for_WindowsXP%28FT_000093%29
.pdf). Detailed technical information is available from that website. Technical assistance with installing the driver software is available from
ThermoProbe, Inc. Check
http://thermoprobe.net/docs/index.html
for the latest version of this document.
Instructions to install the TL2-A PC driver (Windows XP shown) The driver for the TL2-A PC (Future Technology Devices
International driver) installs a Virtual Com Port (VCP) on your PC. The steps to install this driver are:
1.
Place the USB flash drive provided with your TL2-A in the USB port of the PC.
2.
Connect the TL2-A to the PC with the provided USB cable.
3.
Make sure the TL2-A is plugged into the wall with the AC power cord.
4.
Make sure the TL2-A is powered on.
5.
A Found New Hardware Wizard window should appear.
