Velp Scientifica
–TB1 Manual
3
1.3 Keys and Functions
The keypad has five keys: ON/OFF, CAL, ▲, ▼, and READ/ENTER.
Keys
Functions
ON/OFF
-
Powers on and shuts off the meter. With the auto switch-off
feature the meter automatically shuts off 20 minutes after last
key press.
CAL
-
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.
READ
/
ENTER
-
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.
-
When in calibration mode, the READ/ENTER key is used to
confirm the measurement for the calibration standards.
▲and▼
-
Active only during calibration mode. These keys are used to
select the calibration point in an incremental/ decremental
manner.
NOTE: This meter is also 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.