SENSIT TECHNOLOGIES
SMART-CAL OPERATION MANUAL • VERSION 18 3
Operational Buttons
The Smart-Cal Station has a three button operation. The Left Button is to start the calibration process
(Calibrate) or to return to the “Ready…” display (Clear) after the previous instrument has been
tested. The Right button is the Bump Test. This allows the operator to test the instrument between
calibrations for proper operation. This will test the current calibration readings in the instrument
memory against the sample gas. If the instrument readings are within 20% of the last calibration
numbers the bump test is a pass. If they are not, “Fail” will appear on the screen and calibration is
required. The Center button is the Menu button. From here you can review the test log, erase the
memory and set the clock. To enter the menu, hold the MENU button for 5-6 seconds to access the
options. This function is password protected.
Performing Calibration
Prepare the instrument by powering on the instrument followed by pressing the power button for 2-3
seconds and releasing until “Smart-Cal Communicating” is displayed on the instrument. Next place
the instrument into the proper position of the cradle and attach the instrument hose to the proper
location on the instrument. Press the left button and calibrator will display “Searching” for the
instrument. If the instrument is communicating to the calibrator the process will continue.
Caution Only place one instrument at a time in the Smart-Cal™ mode within 4 feet of
the Smart-Cal™ Calibrator.
After an instrument begins communicating (“Searching”) with the calibrator, the display on the
calibrator will read “Device Found”. Next it will display the brand of instrument (i.e. Sensit or Trak-
It) and its serial number. The version number of the instrument will automatically determine what
gases should be calibrated. If the instrument and the calibrator do not communicate within 15
seconds press the “Calibrate/Clear” button on the calibrator. “IR Failed” will be displayed. Place the
instrument in the working display, access the Smart-Cal feature and retry. If unsuccessful the
instrument or calibrator may need service. Try another instrument to confirm calibrator is working.
Contact manufacturer with any questions.
Testing will take place in the following order:
1. The calibrator will automatically reset the date and time of the instrument it is testing. This
creates consistency for record keeping purposes.
2. “Autozero” to test the pump flow block and sensors for proper zero reading. Display will
read “FAIL” followed by the type of sensor failed such as Pump Flow, LEL, NAT, PRO, O2,
CO or H2S on the calibrator if any specifications are not met. Calibration cannot occur if any
of these have failed. If this has failed the display will read “Autozero Fail” on the top line
and sensor type on the bottom Line. This should remain on the display until the left button is
pressed again at which point “Ready…” will show on the display. Pump flow is checked by
all internal valves closing, instrument pump runs and looks for flow block parameters.
Multiple sensor failures are displayed individually for 1-2 seconds each. If any of these
failures occur the instrument will display “Calibration Failed” on its display. Pressing the left
button two times will restart the calibration process.
3. The calibrator will automatically apply the gases to the instrument. Calibration occurs in the
following order as the gases are required: 50% LEL Methane, CO, H2S, 100% methane or
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