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Guru
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Does Anyone Knows Source for High Isolation XFR for Pirani Ion Vacuum Gauge?

04/21/2017 2:02 AM

Does anyone knows source for high isolation XFR for PIRANI and Ion Current mixed type High Vacuum gauge? I need help. Leakage current less than 100pA between primary and secondary.

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Prof. (Dr.) Shyam, Managing Director for Sensors Technology Private Limited. Gwalior, MP474001, India.
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Guru
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#1

Re: Does anyone knows source for high isolation XFR for PIRANI Ion Vacuum gauge?

04/21/2017 2:03 AM

Surely the manufacturers of this item have a phone number?

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Guru

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#2
In reply to #1

Re: Does anyone knows source for high isolation XFR for PIRANI Ion Vacuum gauge?

04/21/2017 2:08 AM

Indeed.

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Guru

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#3

Re: Does Anyone Knows Source for High Isolation XFR for Pirani Ion Vacuum Gauge?

04/21/2017 9:27 AM
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Guru

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#4

Re: Does Anyone Knows Source for High Isolation XFR for Pirani Ion Vacuum Gauge?

04/21/2017 11:09 AM

Is this a new system you are hacking, or an existing gauge?

Is this a continuously driven filament type, or pulsed type gauge?

If you are looking for the Ion Current part of the circuit, then Solar Eagle has you covered with the correct circuit. You do realize that ionizarion gauges may be inaccurate, depending on the gas present or the air ingress?

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Guru
India - Member - Sensors Technology Popular Science - Cosmology - Dream, Think and Act United Kingdom - Member - New Member United States - Member - New Member Canada - Member - New Member

Join Date: Aug 2006
Location: AM-51, Deen Dayal Nagar, Gwalior, Madhya Pradesh, MP 474001, India
Posts: 3332
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#5
In reply to #4

Re: Does Anyone Knows Source for High Isolation XFR for Pirani Ion Vacuum Gauge?

04/21/2017 10:26 PM

Students have designed the gauge. It has DC filament power and also DC grid power for the ion gauge. Pulse power can also be used.

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Prof. (Dr.) Shyam, Managing Director for Sensors Technology Private Limited. Gwalior, MP474001, India.
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Guru

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#6
In reply to #5

Re: Does Anyone Knows Source for High Isolation XFR for Pirani Ion Vacuum Gauge?

04/21/2017 10:32 PM

What sort of transformer is it? Power transformer? Signal transformer?

100 pA leakage in a transformer is insanely low. Ultra-low-leakage medical isolation transformers have leakage specs orders of magnitude greater than that.

Question: what makes such ultra-ultra-low-leakage a requirement and is there a workaround? Maybe a different design? A leakage spec that low and you may be talking beaucoup moolah ($$$$$) for a custom designed transformer.

My advice? Reconsider the design to relax that spec to something more realistic.

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Andrew Westman (2); James Stewart (1); PWSlack (1); Shyam (1); SolarEagle (1)

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