Thermo Fisher Scientific TN100 Turbidimeter - Manual (Page 8)

Instruction Manual TN-100/ T-100
3
1.3
Keys and Functions
The keypad has five keys: ON/OFF, CAL, ▲, ▼, and READ/ENTER.
Key Functions
Powers on and shuts off the meter. With the auto switch-off feature the
meter automatically shuts off 20 minutes after last key press.
Initiates the calibration mode of the meter. When pressed, the meter is set
to accept the first calibration standard.
It is also used to exit the calibration mode if the user does not want to
follow the complete calibration procedure.
When in measurement mode, the READ/ENTER key is used to perform a
measurement.
Single-shot measurements: When the key is pressed and released
immediately (a quick key stroke of less than 0.3 seconds), the display will
blink [-Rd-] for 10 times and then display the measured value.
Continuous measurements
: If the READ/ENTER key is pressed and held,
the instrument will perform a continuous measurement during which the
display is updated every 2 seconds. This can be used for indexing vials.
(This function is not available in calibration mode).
After the READ/ENTER key is released, the instrument will automatically
perform a single-shot measurement.
Active only during calibration mode. These keys are used to select the
calibration point in an incremental/ decremental manner.
NOTE: This meter is fitted with an auto incrementing feature, i.e. after
the successful calibration of one point it auto selects the next calibration
point, or automatically exits the calibration mode after the fourth
calibration point.
Figure 3: Keypad
OFF
ON
CAL
READ
ENTER
READ
ENTER
CAL
OFF
ON
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