| Products > Test Equipment |
| Keysight's new 34465A (6.5 digit) and 34470A (7.5 digit) bench multimeters |
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| HighVoltage:
Another confirmation, that the new firmware v2.08 gives us one more digit of resolution on the 34461A. Top Screen-shot: 34461A, FW v1.10 Middle Screen-shot: 34461A, FW v2.08 Bottom Screen-shot: 34470A, FW v2.08 Voltage source is a simple AD587 10V reference setup, measured over a short period of time All three DMM's received the same signal, all three are in 10 PLC mode and all have been pressed "Autoscale Once". |
| dadler:
--- Quote from: LA7SJA on March 21, 2015, 07:33:20 am ---#dadler Have you tried the dual display on DCV with ACV as secondary? JFG --- End quote --- Just tried this- it works on screen, but it clicks the relays every couple of seconds and locks up the display for each update. Anyone else seeing this? Does the same thing with ACV primary and DCV secondary. Manual ranging doesn't help. Is this really implemented by constantly switching relays? AC+Frequency/Frequency+AC is fine. AC+DC is clicky clacky. |
| rosbuitre:
--- Quote from: dadler on March 21, 2015, 07:50:29 pm --- --- Quote from: LA7SJA on March 21, 2015, 07:33:20 am ---#dadler Have you tried the dual display on DCV with ACV as secondary? JFG --- End quote --- Just tried this- it works on screen, but it clicks the relays every couple of seconds and locks up the display for each update. Anyone else seeing this? Does the same thing with ACV primary and DCV secondary. Manual ranging doesn't help. Is this really implemented by constantly switching relays? --- End quote --- Yes, measuring about 3 seconds, 3 seconds locks and switching relays and the cycle is repeated |O, in ACV no, everything ok |
| dadler:
--- Quote from: rosbuitre on March 21, 2015, 07:58:49 pm --- --- Quote from: dadler on March 21, 2015, 07:50:29 pm --- --- Quote from: LA7SJA on March 21, 2015, 07:33:20 am ---#dadler Have you tried the dual display on DCV with ACV as secondary? JFG --- End quote --- Just tried this- it works on screen, but it clicks the relays every couple of seconds and locks up the display for each update. Anyone else seeing this? Does the same thing with ACV primary and DCV secondary. Manual ranging doesn't help. Is this really implemented by constantly switching relays? --- End quote --- Yes, measuring about 3 seconds, 3 seconds locks and switching relays and the cycle is repeated |O, in ACV no, everything ok --- End quote --- Argh, I can't allow the relays to constantly click like that. The display also hanging drives me nuts. The manual says: --- Quote ---1 After making one o rmore primary measurements for approximately 4 seconds, the DMM makes one secondary measurement. --- End quote --- No mention of the implementation relying on constant relay switching :scared: |
| HighVoltage:
--- Quote from: dadler on March 21, 2015, 07:50:29 pm ---Just tried this- it works on screen, but it clicks the relays every couple of seconds and locks up the display for each update. Anyone else seeing this? --- End quote --- Yes, it is the same annoying relay action on the 34470A Interestingly the much older 34410A does not do this for dual display action. |
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