Amprobe TMA-21HW User Manual page 18

Calibration mode
• Push "SET" key six times to enter this mode, the "USEr CAL no" symbol is
displayed.
• Push "" and "" keys to select "
• Push "↵" key to enter the temperature calibration mode, the current
temperature reading and the current temperature scale factor value are
displayed.
• Push , ,  and  keys to setting the scale factor value until the
temperature display reading reaching desired value.
• Push "↵" key to store the scale factor value, the "CAL PASS" symbol will
display one second, and enter the reset to factory default temperature
calibration value mode, the "dEF CAL no" symbol is displayed.
• Push "" or "" key to select "
push "↵" key will reset to factory default calibration value and enter the
air velocity zero calibration mode, the "CAL 0" symbol is displayed.
• Rotate the sensor protection tube to close the sensor window, until the air
velocity reading is stable then push "↵" key to store the zero air velocity
reading, and enter the air velocity scale factor calibration mode, the scale
factor value is displayed.
• Rotate the sensor protection tube, make sure the sensor window is fully
exposed. Insert the meter probe into the tunnel with the sensor window
toward the air flow. Secure the probe firmly with the velocity sensor
placed where air speed is known.
• Push , ,  and  keys to setting the scale factor value until the display
reading reaching desired value, then push "↵" key to store the scale
factor value, the "CAL PASS" symbol will display one second, and enter
the reset to factory default air velocity calibration value mode, the "dEF
CAL no" symbol is displayed.
• Push "" or "" key to select "
push "↵" key will reset to factory default calibration value and enter the
humidity calibration mode, the current humidity reading and the current
humidity scale factor value are displayed.
• Push , ,  and  keys to setting the scale factor value until the
humidity display reading reaching desired value.
• Push "↵" key to store the scale factor value, the "CAL PASS" symbol
will display one second, and enter the reset to factory default humidity
calibration value mode, the "dEF CAL no" symbol is displayed.
• Push "" or "" key to select "
push "↵" key will reset to factory default calibration value and exit
setting mode.
" symbol is displayed.
" or " ", if select "
" or " ", if select "
" or " ", if select "
13
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" then
" then