Humidity Effect; Calibration Errors And Error Codes - Maxtec Handi+ Operating Manual & Instructions For Use

4.4 Humidity Effect

Humidity has no effect on the performance of the Handi
diluting the gas, as long as there is no condensation. Depending on the
humidity, the gas may be diluted by as much as 4%, which proportionally
reduces the oxygen concentration. The device responds to the actual
oxygen concentration rather than the dry concentration. Environments
where condensation may occur are to be avoided since condensate may
obstruct passage of gas to the sensing surface, resulting in erroneous
readings and slower response time. For this reason, the following is
recommended:
» Avoid usage in environments greater than 95% relative humidity.
» When used in a breathing circuit, place the sensor upstream of the
humidi er.

5.0 CALIBRATION ERRORS AND ERROR CODES

The Handi + analyzers have a self test feature built into the software
®
to detect faulty calibrations, oxygen sensor failures, and low operating
voltage. These are listed below, and include possible actions to take, if an
error code occurs.
E02: No sensor attached
Open unit and 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. Press and hold the
Calibration Button for three seconds to manually force a new calibration.
E04: Battery below minimum operating voltage
Contact Customer Service for possible battery replacement
CAL Err St: O2 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 (Please note that this can take
up to one half hour, if the device is stored in temperatures outside the
speci ed operating temperature range).
CAL Err lo: Sensor voltage too low
Press and hold the Calibration Button for three seconds to manually force
a new calibration. If unit repeats this error more than three times, contact
Customer Service for possible sensor replacement.
CAL Err hi: Sensor voltage too high
Press and hold the Calibration Button for three seconds to manually force
a new calibration. If unit repeats this error more than three times, contact
Customer Service for possible sensor replacement.
866.4.Maxtec
6
www.maxtecinc.com
+ other than
®