Testo 350 Calibration - Actoolsupply.com

www.actoolsupply.com6. Troubleshooting1. Gas adjustment in general not easily reproducible(indicated value is not correct, even after adjustment).Possible causes:- Adjustment was initiated before the value was stable.- Adjustment conditions not identical with control conditions, sensorsdrifts too much or sensor is consumed.Influences on the reproducibility of the gas adjustment- Test gas bottles used in adjustment different from those used incontrol- Ambient temperature, device temperature- Flow rate of measuring gas- Pressure of the test gas at the gas inlet- Pressure reducer/regulator causes pressure jolts- Time when adjustment is initiated and value is read off in control- Leakage in the entire gas route system- Adjustment point outside the sensor measuring range or outsidethe sensor specificationRemedy:- Rinse pressure reducer and hoses through if necessary- Keep general influencing conditions stable- Carry out a leak test before gas adjustment- Do not change the test gas bottle between adjustment andcontrol- Note the sensor specification and Testo recommendation for testgas- Replace sensors with significant drift- If adjusting several sensors one after the other, you may need torinse through between the individual test gas admissions (toavoid or minimise possible cross-sensitivity effects)28www.actoolsupply.com