They are MOVs. They protect the Guard circuit to chassis and outguard DC
supply.
Tom
----- Original Message -----
From: "David McQuate" <[email protected]>
To: <[email protected]>
Sent: Thursday, March 13, 2014 2:41 PM
Subject: Re: [volt-nuts] Fluke 5100B Calibrator†Repair Help
Question: are the vaporized parts varistors (usually put in series for
inrush current limiting) or MOVs (placed in shunt to limit transient peak
voltages)? My comments concerned the former...
Dave
On 3/13/2014 8:34 AM, David Smith wrote:
I need some help with repairing a Fluke 5100B Calibrator.
The capacitor support bracket fell into the power supply module and
vaporized both varistors, RV1 and RV2. A call to Fluke tells me they no
longer can supply these MOV's. According to the manual's parts list these
varistors are in-house parts by Fluke. I have no way of determining a
substitute part. Is there anyone that can help me identify what could be
a useful replacement?
Thanks,
Dave - W6TE _______________________________________________
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Clear Stream Technologies
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