 
| Received: |
by ipc.org (Smail3.1.28.1 #2)
id m0v6cXZ-0000PiC; Fri, 27 Sep 96 08:01 CDT |
| Content-Type: |
text/plain; charset="us-ascii" |
| Old-Return-Path: |
|
| Date: |
Fri, 27 Sep 1996 09:09:46 -0400 |
| Precedence: |
list |
| Resent-From: |
|
| Resent-Sender: |
|
| X-Status: |
|
| From [log in to unmask] Fri Sep 27 08: |
56:44 1996 |
| X-Mailing-List: |
|
| Content-Length: |
2320 |
| TO: |
|
| Return-Path: |
<TechNet-request> |
| Resent-Message-ID: |
<"M4UBR3.0.tFI.O0zIo"@ipc> |
| Subject: |
|
| From: |
|
| Status: |
O |
| X-Loop: |
|
| Mime-Version: |
1.0 |
| Message-Id: |
|
| Parts/Attachments: |
|
|
Phil,
We routinely use a flying probe tester (and have for the last 15
years). Our selected criteria are 10 ohms maximum for continuity to be
verified and 10 Megohms minimum for anti-continuity to be considered OK.
We can select other values both above and below these. In short (no pun
intended but it sounded cute after I typed it), we could meet the
requirements.
Howard Feldmesser
The Johns Hopkins University Applied Physics Laboratory
>IPC-RB-276 has test procedure which was written around the bed-of-nails
>bare-board testers.
>
>The test requirement is basically as follows
> 1. Test continuity and shorts using IPC-ET-652 with the folowing
>parameters:
> A. Resistance of any circuit shall not exceed 50 ohms for Class 1,
>or 20 ohms for class 2 and 3. For lengthy circuits specify what
>you need.
> B. Isolation resistance shall be greater than 0.5 megohm for class 1
>and 2.0 megohms for class 3. Voltage is selected is sufficient
>to provide resolution, but if not specified, it is 40 volts.
>
>Presently I have received information that these parameters could not be used
>for flying probe testers. If this is so, I would like some advice on what it
>should say so that the flying probe could be used per this specification
>could be used.
>
>Thanks
>Phil Hinton
>[log in to unmask]
>520-745-1013
>
>***************************************************************************
>* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
>***************************************************************************
>* To unsubscribe from this list at any time, send a message to: *
>* [log in to unmask] with <subject: unsubscribe> and no text. *
>***************************************************************************
***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To unsubscribe from this list at any time, send a message to: *
* [log in to unmask] with <subject: unsubscribe> and no text. *
***************************************************************************
|
|
|
