EBME Forums Forums Maintenance Technical Assistance Infusion pump testing with Lagu

Hello everybody, I am new over here, and I really hope this is the right place to come with my problem...

There's a customer over here who owns a Metron Lagu2 dual channel Infusion Pump Tester, and he has a problem measuring low flowrates. He has asked me for support, but unfortunately I do not have very much experience with the Lagu...

He is using a Arcomed 6000 Syringe Pump and wants to do measurements in the range of 1 or 2ml but notices a deviation of 75% when he is doing the measurement with an interrogation time(dT) of 30 seconds. When he has a dT of 180 seconds, his deviation is 20%. It's much less, but still too much, and he claims that -according to the IEC60601-2-24 standard- the default time should be 30 seconds. (however I cannot find it anywhere in the IEC60601-2-24 standard myself)
Some other settings: cycles, 30sec., back pressure= 0, testtime 30 min., delaytime 0 min., peak 10%.

- Does anybody know if the dT -according to IEC60601-2-24 really should be 30 seconds, or is it at least 30 seconds?(the Lagu's max. dT is 600 sec., it's default value is 30 sec.)
- Does anybody know what should be the preferred settings for an accurate reading while using the equipment as mentioned above?

Range, try this link...

http://www.metron-biomed.com/

Perhaps they can help.

Thank you Shins, I've tried it already.
I have mailed mr.Kristianson for a couple of weeks ago, but for some kind of reason he does not reply to me...

Looking at the set up that's being used, I would suggest trying a fairly long delay time of at least a few minutes. Make sure that the line is purged through before connecting to the Lagu too.

Running the pump at such a low rate means that there will always be a small delay in the delivery of the fluid.

Good luck,

Ivor

Okay Ivor, thanks again, I will try this one out.

But regarding my other question:

- Does anybody know if the dT -according to IEC60601-2-24 really should be 30 seconds, or is it at least 30 seconds?

I have to say my comisserations (spelt wrong) on the Lagu. We have one that after numerous times back to base repair and then the long long long wait get it back and still broken. Software that has more bugs in it than windows.

Anyway go for the longer time as the system used internally takes a long time to register at low rates.

Also make sure you use deionized water as the machines internals dont like tap water, no matter how clean and soft.

We liked it so much we went back to our trusty old IDA.