'max' wrote in message news. >Hi, >>is it normal that in a 828 RFL/Clarke HEss calibrator if i set >140mV(as example) at the output i have a tension that is instable: >140.20 to 139.80 all time? >>In the range of 10 volt and 100 Volt the things are better? >>Thanks >Marvellous bit of kit! Over a 1 minute period I saw 139.88mV to 140.19mV.

This ties in with what you see. Even by itself, +/- 0.1% is not bad for the 3.5 digit setting thumbwheels. The noise is not from the RFL but due to low level AC and RF pickup on the leads from the RFL to the DVM. A filter of say 1kohm and 1000uF across the DVM input and (my) display is rock solid at 140.02mV for minutes on end. Got a 828 manual you could share?

Somebody knows the RFL/Clarke HESS 8. Yes i've manual that i've download from the site of Clarke Hess. If you want i can email to you. CLARKE Hess / RFL 828 AC/DC V-A Power Supply Current Calibrator - CAD $2,505.84. Clark Hess made for RFL Model 828 AC/DC V-A.

Hi, Yes i've manual that i've download from the site of Clarke Hess.If you want i can email to you. The problem is that if i set 100 mV,all time my DMM read a instable value that oscillate continuosly from 100 to 99.5 to 101 to 99.3 etc.

In the other range the last digits are more stable. I've tried to put the filter acrossss the input of dmm but nothing the value is always oscillating,in a second it's change 3,4,5 times!!!! 'john jardine' ha scritto nel messaggio news:463cc3ff$0$2297$. >>'max' wrote in message >news. >>Hi, >>>>is it normal that in a 828 RFL/Clarke HEss calibrator if i set >>140mV(as example) at the output i have a tension that is instable: >>140.20 to 139.80 all time?

>>>>In the range of 10 volt and 100 Volt the things are better? >>>>Thanks >>>>Download Insectonator Zombie Mode Hacked All Guns Online. Marvellous bit of kit! >>Over a 1 minute period I saw 139.88mV to 140.19mV. This ties in with what >you see.

Download Free Out Of My Comfort Zone Steve Waugh Ebook Download there. Even by itself, +/- 0.1% is not bad for the 3.5 digit setting >thumbwheels. The noise is not from the RFL but due to low level AC and RF >pickup >on the leads from the RFL to the DVM. >A filter of say 1kohm and 1000uF across the DVM input and (my) display is >rock solid at 140.02mV for minutes on end.

>>Got a 828 manual you could share? >>>>>>>>--. 'maxi' wrote in message news:qfo%h.26547$. >Hi, >>Yes i've manual that i've download from the site of Clarke Hess.If you want >i can email to you. >The problem is that if i set 100 mV,all time my DMM read a instable value >that oscillate continuosly from 100 to 99.5 to 101 to 99.3 etc. >In the other range the last digits are more stable. >I've tried to put the filter acrossss the input of dmm but nothing the value >is always oscillating,in a second it's change 3,4,5 times!!!!

I'd be very pleased if you could email it! My address is. John.jardine [@ sign] idnet.co.uk Sounds like the voltage 828 control loop itself is a bit unstable. Maybe a capacitor failing. My unit has some internal noise that is coming in from the 240Vac power inlet (LO-GND connecting link 'on' or 'off' it's still the same) but not the amount you are noticing. PS: Just confirming my filter was wired as this..--------..--------. CLARKE DMM HESS ___ POS o----- ___ --o----o POS 1k ---+ --- 1000u NEG o------------o----o NEG '---------' '---------'.

An item that has been used previously. The item may have some signs of cosmetic wear, but is fully operational and functions as intended. This item may be a floor model or store return that has been used. See the seller’s listing for full details and description of any imperfections.

Seller Notes: “ we only test for power due to lack of knowledge, power button missing knob and de-energizer knob broken off, both still work fine ” Brand: RFL Country/Region of Manufacture: United States MPN: 828 UPC: Does not apply.