Teledyne MX300 - Manual (Page 32)

Service Instructions MX300
Teledyne Analytical Instruments 24
3.4 Sensor Maintenance
DO check the sensor for damage or leaks before use.
DON’T immerse the R17MED sensor in liquid.
DON’T autoclave the R17MED sensor.
DON’T open or try to repair the sensor.
Before every use, the sensor, cable and connections should be checked.
Check the sensor for leaks and condensation. Check the cable for splitting or
cracked insulation. Make sure the connections are tight and dry.
In the event that the sensor has been damaged, consult the Material Safety
Data Sheet in the Appendix for handling guidelines.
3.5 Calibration
Incorrect readings can often be traced to improper calibration. The MX300
should be calibrated before each use and every 8 hours to maintain accuracy. It
must be calibrated whenever new sensor or batteries are installed. Calibration
using methods other than described in section 2.1.4 will lead to improper opera-
tion.
Whenever new batteries are installed or removed for any reason, the Moni-
tor defaults to the calibration mode with the LCD display flashing 00.0. Only the
CAL and ON/OFF (I/O) keys are functional at this point.
3.6 Alarms
To set the alarms on the MX300 Monitor, refer to Section 2.1.4.
3.7 Factors Affecting Sampling Accuracy
Refer to Section 2.3 of this manual.
3.8 Troubleshooting
The MX300 Oxygen Monitor provides a variety of built-in safety features that
prevent its use when a fault is detected. When a unit displays the message √ SENSOR
and sounds the audible and visual alarm continuously, it is an indication of a faulty
connection between the sensor and the unit or an expired or faulty sensor. It also indi-
cates when oxygen concentrations are below 18%.
For assistance with troubleshooting, see Table 3-1.