We have installed a new (Used condition) tube on GE Sytec 2000 ct scanner,all the things going alright, like KV go upto 120, but MA did not increase, ma meter show 0 but i have selected 40ma but when i select 60MA, the meter shows 20 ma some time and some time not, so is there any adjustment need?It also shows the captured image of phentom on monitor.
I suspect one of your high voltage tanks is bad or you have a blown fuse somewhere. What does the waveform look like for both sides. You must have a bleeder to do this.
You probably have a low filament output. If the "new" tube is not from the same manufacturer like GE?Dunle then there may easily be a mismatch in filament output. This is very common when changing a GE tube with a Dunlee. The filamnet characteristics are not the same.
I am located just across the Gulf from you guys if you need help.
Dear Sir, i thanks all people who reply my post,we have solved the problem by adjusting the FIL0,FIL1 and FIL2 variables and ct is working good now.
Thanks your people again.
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shahzad Ahmad
Sytec MA problem
March 26, 2005 10:53
We have installed a new (Used condition) tube on GE Sytec 2000 ct scanner,all the things going alright, like KV go upto 120, but MA did not increase, ma meter show 0 but i have selected 40ma but when i select 60MA, the meter shows 20 ma some time and some time not, so is there any adjustment need?It also shows the captured image of phentom on monitor.
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Mike Lynch
Re: Sytec MA problem
March 26, 2005 02:49
I suspect one of your high voltage tanks is bad or you have a blown fuse somewhere. What does the waveform look like for both sides. You must have a bleeder to do this.
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Ralph Childs
Re: Sytec MA problem
March 26, 2005 11:00
Shahzad,
You probably have a low filament output. If the "new" tube is not from the same manufacturer like GE?Dunle then there may easily be a mismatch in filament output. This is very common when changing a GE tube with a Dunlee. The filamnet characteristics are not the same.
I am located just across the Gulf from you guys if you need help.
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shahzad Ahmad
Re: Sytec MA problem
April 02, 2005 08:03
Dear Sir, i thanks all people who reply my post,we have solved the problem by adjusting the FIL0,FIL1 and FIL2 variables and ct is working good now.
Thanks your people again.
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Mohammad A Khan
Re: Sytec MA problem
March 27, 2005 07:46
Check your HV cables. Maybe they are connected opposite. Cathode to cathode and Anode to anode. Otherwise I will suspect the tube.
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