TQC LD0800 - Data Download; Measurement Accuracy

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5.1.11. Unit
It is possible to choose 3 dierent measurement units (μm, mm and mils) for readings. Switch to
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a. Press “Left Key” once to enter into menu mode (”Root” directory)
b. Press “Up Key” or “Down Key” to activate “Options”, and press “Left Key” once to enter
c. Press “Up Key” or “Down Key” to activate “Unit Settings”, and press “Left Key” once to enter
d. Press “Up Key” or “Down Key” to select the needed unit. Press “Left Key” to conrm it.
5.1.12. Backlight
In dim light, the LCD backlight can be activated. The backlight will accelerate battery consump-
tion. While in measuring mode, press “Right Key” once to switch on/o the backlight. In menu
mode, switch it as below;
a. Press “Left Key” once to enter into menu mode (”Root” directory)
b. Press “Up Key” or “Down Key” to activate “Options”, and press “Left Key” once to enter
c. Press “Up Key” or “Down Key” to activate “Backlight”, and press “Left Key” once to enter
d. Press “Up Key” or “Down Key” to select on or o. Press “Left Key” to conrm your choice.
5.1.13. Data Download
The supplied USB cable can be used to connect the instrument with a computer to download
stored readings. If USB connected, the symbol will appear on the bottom of the LCD. When
you make the USB connection for the rst time, the driver and software for this application needs
to be installed onto your computer.
5.1.14. Auto Power o
The instrument can be turned o by pressing the key manually. In addition, for saving power,
the instrument will turn o automatically if no operation occurs within 3 minutes. Before turning
o automatically, you will hear several beeps, by pressing any key during these beeps, the instru-
ment will restart timing and continue working. Enable or disable this function as below;
a. Press “Left Key” once to enter into menu mode (”Root” directory)
b. Press “Up Key” or “Down Key” to activate “Options”, and press “Left Key” once to enter
c. Press “Up Key” or “Down Key” to activate “Auto Power o”, and press “Left Key” once to enter
d. Press “Up Key” or “Down Key” to select Disable or Enable. Press “Left Key” to conrm your
choice.
5.1.15. Measurement Accuracy
For factors which may aect the accuracy of measurements, please check paragraph 5.2. Under
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measuring tolerance.
When using the statistics programmer for obtaining a mean value it is advisable to place the
probe several times at a chosen measuring spot or at xed measuring spot. Any false readings
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