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do_troubleshooting [10/04/2018 09:34] pieter [Check the electrode] |
do_troubleshooting [10/04/2018 09:35] pieter [Check the electrode] |
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* This same NTC value should be measured between the two electrode metals Lead and Platinum at the electrode type. Value? ....... Ohm | * This same NTC value should be measured between the two electrode metals Lead and Platinum at the electrode type. Value? ....... Ohm | ||
* Another measurement is between the BNC plug contacts and the metals (Lead and Platinum) at the electrode tip. Be careful when touching the Platinum metal cap at the tip as it easily detaches from the electrode which would destroy it permanently. Each metal is connected to one of the BNC contacts and should measure around zero Ohm. | * Another measurement is between the BNC plug contacts and the metals (Lead and Platinum) at the electrode tip. Be careful when touching the Platinum metal cap at the tip as it easily detaches from the electrode which would destroy it permanently. Each metal is connected to one of the BNC contacts and should measure around zero Ohm. | ||
- | * Value between the BNC outer conductor and Lead metal? ....... Ohm | + | * Value between the BNC outer conductor and Lead metal? ....... Ohm (should be zero) |
- | * Value between the BNC central pin and Platinum tip? ....... Ohm | + | * Value between the BNC central pin and Platinum tip? ....... Ohm (should be zero) |
- | * Value between the BNC outer conductor and Platinum tip? ....... Ohm | + | * Value between the BNC outer conductor and Platinum tip? ....... Ohm (should be NTC value) |
- | * Value between the BNC central pin and Lead metal? ....... Ohm | + | * Value between the BNC central pin and Lead metal? ....... Ohm (should be NTC value) |
* A resistance measurement between the temperature banana plugs should give a resistance value around 1100 Ohm @ 25°C. This resistance should increase when becoming warmer. Value? ....... Ohm | * A resistance measurement between the temperature banana plugs should give a resistance value around 1100 Ohm @ 25°C. This resistance should increase when becoming warmer. Value? ....... Ohm | ||
3. When 1. and 2. are found to be OK. The electrode should be reassembled. Watch very carefully for the correct placement of membrane, O-ring and membrane cap. After reassembling, | 3. When 1. and 2. are found to be OK. The electrode should be reassembled. Watch very carefully for the correct placement of membrane, O-ring and membrane cap. After reassembling, |