[Techtoolslist] HV probe recommendations?

[John Robertson]

At 8:35 PM -0500 4/8/06, Rodger Boots wrote:

>joemagiera wrote:

>

>>Anyone have any recommendations on a HV probe?  What to look for?  What to

>>avoid?  Models?  etc.  Thanks,

>>

>>Joe

>>

>>

>

>

>There are 2 basic types,  ones with a built-in meter and ones that 

>are just a divider and connect to either an external meter or 

>oscilloscope.  If you're just going to use it on monitors or TV sets 

>the internal meter ones will do.

>

>The external meter type can do more, such as work on AC sources like 

>microwave ovens, and they can be used to see ripple voltages.  These 

>are only accurate when used with a meter or 'scope with the correct 

>input resistance.  If they are made for 10 Mohm they will read right 

>on a DVM, but you'll have to do some corrections if direct connected 

>to a 'scope (1 Mohm input), but if used with a 10:1 scope probe you 

>would have 10 Mohms which would be correct.

>

>There are always HV probes on eBay.  A couple of external meter 

>types are 

><http://cgi.ebay.com/FLUKE-HV-PROBE-MODEL-80K-40HV-GO-TO-40KV_W0QQitemZ7607856709QQcategoryZ50971QQssPageNameZWDVWQQrdZ1QQcmdZViewItem>item 

><http://cgi.ebay.com/FLUKE-HV-PROBE-MODEL-80K-40HV-GO-TO-40KV_W0QQitemZ7607856709QQcategoryZ50971QQssPageNameZWDVWQQrdZ1QQcmdZViewItem>7607856709 

>and 

><http://cgi.ebay.com/FLUKE-80K-40-HV-High-Voltage-Probe_W0QQitemZ7606210499QQcategoryZ50971QQssPageNameZWDVWQQrdZ1QQcmdZViewItem>item 

><http://cgi.ebay.com/FLUKE-80K-40-HV-High-Voltage-Probe_W0QQitemZ7606210499QQcategoryZ50971QQssPageNameZWDVWQQrdZ1QQcmdZViewItem>7606210499. 

>Examples of internal meter probes would be 

><http://cgi.ebay.com/ebaymotors/HIGH-VOLTAGE-TEST-PROBE-MODEL-2900A_W0QQcmdZViewItemQQcategoryZ43989QQitemZ4627936643QQrdZ1QQsspagenameZWDVW>item 

><http://cgi.ebay.com/ebaymotors/HIGH-VOLTAGE-TEST-PROBE-MODEL-2900A_W0QQcmdZViewItemQQcategoryZ43989QQitemZ4627936643QQrdZ1QQsspagenameZWDVW>4627936643 

>and 

><http://cgi.ebay.com/30-K-V-HIGH-VOLTAGE-PROBE_W0QQitemZ7608295497QQcategoryZ50971QQssPageNameZWDVWQQrdZ1QQcmdZViewItem>item 

><http://cgi.ebay.com/30-K-V-HIGH-VOLTAGE-PROBE_W0QQitemZ7608295497QQcategoryZ50971QQssPageNameZWDVWQQrdZ1QQcmdZViewItem>7608295497.


I prefer the internal meter for our shop HV probe. It is compact and 
the lads automatically use it to discharge all monitors. I know that 
only the XY ones seem to have a problem with diode failure when 
shorted by a jumper wire, but using the probe to discharge all 
monitors reduces the risk of forgetting on a B&W XY.

Small write-up on discharging monitors for the newbies:
http://www.flippers.com/vid-tips.html#discharge

John :-#)#
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