Temperature sensor short

[chemwipe]

Hello all -

I was having a problem on my HP5890 giving me a reading of

"FAULT: DETB TEMP RDG"

which I've seen before, and remedied with changing the temperature sensor/heating element.

My question is: How long is it usually before the wires on the sensor become exposed like this:



I don't think I installed this one too long ago, but I can't find in my maintenance log when I did it. I think it was less than a year ago.

Thanks in advance for your help!

John

[rb6banjo]

I've never had one go bad. My oldest 5890A has been in continuous service since 1988. I've had a similar problem with an inlet on a 5890 Series II. I made the error go away by packing the insulation between the leads so that they're well insulated from each other.

Hewlett Packard/Agilent GC's are rugged buggers! I'd never buy another brand if I wasn't forced.

[chemwipe]

I've never had one go bad. My oldest 5890A has been in continuous service since 1988. I've had a similar problem with an inlet on a 5890 Series II. I made the error go away by packing the insulation between the leads so that they're well insulated from each other.

Good idea on insulation between the leads.

I just now succesfully installed a new sensor (from another instrument with a newer looking sensor) and now my error is

"DET B NOT INSTALLED"

Time to re-check all the connections.

John

[James_Ball]

It mostly depends on how often you work on the injection ports. If you never remove them those leads will pretty much never get exposed, if you have to remove the port to clean often then they will get like that fairly quickly if you are not careful.

I have also extended the useful life on them by placing some type of insulator between the wires and making sure they don't touch the heater block.