Ned,
I have used the John Cubb meter successfully many times, I have made measurements of vehicle dashboard areas using the JCI unit to measure electrostatic charge. This measures the charge without any contact to the unit under test. The unit measures charge through an aperture at the front of the unit. You really need to fix the distance between EUT and the meter as specified in the manual, 10 mm I think. There is also a voltmeter attachment for the unit this permits a more directed reading and a more accurate measurement especially if the EUT moves around. We also found that to get voltage measurements from plastics using the voltmeter we needed to place a small piece of adhesive foil to the plastic. This provided a suitable connection point for the voltmeter There is software available that will permit valuable data logging. All in all a very useful tool Regards Peter --------------------------------------------------- Peter Phillips EMC Consultant MIRA (Motor Industry Research Association) Tel: ++44 (0) 2476 355576 Mobile: ++44 (0) 780 3083657 Fax: ++44(0) 2476 355486 e-mail: [email protected] -----Original Message----- From: Ned Devine [mailto:[email protected]] Sent: 16 December 1999 14:42 To: 'IEEE, EMC/Product Safety' Subject: Measuring ESD Hello, I need some help from the ESD experts. I am trying to find a way to measure the electro-static build-up on a hand operated pump. The device is used to suck out the gas from small gas engines before the service. Obviously, an ESD event would not be a good thing. We are trying to validate some design concepts for the customer. The pump is a piston type. It sort of looks like a giant syringe with a one way valve. The pump has integral threads and is screwed to a large 2-3 gallon plastic tank. The pump is used to create a vacuum in the tank. You need to pump, really pull, it 10-15 times to get the necessary vacuum. A siphon hose is attached to the tank. You open a clamp on the hose to suck the gas into the container. I think I need a static monitor or field meter. Does anyone have any ideas on test equipment or test methods? I did a search and I came up with John Chubb Instrumentation, model JCI 140 Static Monitor. Does anyone have any experiences with this meter or others? Ned Devine Entela, Inc. Program Manager III Phone 616 248 9671 Fax 616 574 9752 e-mail [email protected] --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators). --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
