MaxTech 800 Bedienungsanleitung PDF herunterladen (Seite 16)

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3.0 FACTORS INFLUENCING ACCURATE READINGS

3.1 Elevation/Pressure Changes

• Changes in elevation result in a reading error of approximately 1% of reading per

250 feet.

• A change in altitude greater than 500 ft will require sensor recalibration.

• This device does not automatically compensate for changes in barometric pressure

or altitude. If the device is moved to a location of a different altitude, it must be

recalibrated before use (see section 2.2).

3.2 Temperature Effects

The MaxVenturi will read correctly (within ±3%) when operating at thermal equilibrium

within the operating temperature range of 15˚C - 40˚C (59˚F - 104˚F). The device

must be thermally stable when calibrated and allowed to thermally stabilize after

experiencing temperature changes before readings are accurate.

For these reasons it is recommended to:

• Perform the calibration procedure at a temperature close to the temperature at

which the device will be operated.

• Allow adequate time for the sensor to equilibrate to a new ambient temperature.

ATTENTION: “CAL Err St” may result from a sensor that has not reached

thermal equilibrium.

4.0 CALIBRATION ERRORS AND ERROR CODES

The analyzer has a self test feature built into the software to detect faulty calibrations,

oxygen sensor failures, and low battery voltage. The tests and actions to take if an error

occurs are:

E02: NO SENSOR ATTACHED

• Disconnect and reconnect sensor. Unit should perform an auto calibration

and should read 20.9%. If not, contact Customer Service for possible sensor

replacement.

E03: NO VALID CALIBRATION DATA AVAILABLE

• Make sure unit has reached thermal equilibrium.

• Perform calibration as described in this manual.

E04: BATTERY BELOW MINIMUM OPERATING VOLTAGE

• Replace batteries.

CAL Err St: O

SENSOR READING NOT STABLE

• Wait for displayed oxygen reading to stabilize when calibrating the device at

100% oxygen.

• Wait for unit to reach thermal equilibrium. Note: this can take up to one half

hour if the device is stored in temperatures outside the speciﬁed operating

temperature range.

CAL Err lo: SENSOR VOLTAGE TOO LOW

• Repeat calibration routine as described in this manual. If unit repeats this error

more than three times, contact Customer Service.

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