Power LED on HVP70 - Page 1
Forum section: electronics / testgear

author: piranha32
author_rank: Unknown
timestamp: June 05, 2017, 11:56:52 pm
content: I've got my HVP70 today. It's a very nice probe and it seems to work fine, but I have one question about the power LED. When I turn power on with provided batteries installed, the LED very briefly blinks green, and then turns red. I can see identical green blink when turning power off. Does it mean that the batteries came discharged? The manual says that with flat batteries the LED should blink. What does the green blink mean?BTW. the mechanism for pulling the shrouds from hooks on the probes is very nice. Adds a lot of confidence when working with high voltages.

author: piranha32
author_rank: Unknown
timestamp: June 08, 2017, 01:23:33 am
content: Bumping the question, and trying to summon @eevblog, or anybody else familiar with the EEVBlog differential scope probe.

author: Electro Detective
author_rank: Super Contributor
timestamp: June 08, 2017, 01:53:05 am
content: Quote from: piranha32 on June 08, 2017, 01:23:33 amAll the guys and gals are over at this pageabout it,www.eevblog.com/forum/testgear/eevblog-hvp70-differential-probe/175/maybe fire the question there..if you can slot it in

author: piranha32
author_rank: Unknown
timestamp: June 08, 2017, 02:16:04 am
content: Thanks. I wanted to start a new thread to make it easier to find, but if the question will get buried again without answer, I'll ask in that thread.

author: JonM
author_rank: Unknown
timestamp: June 08, 2017, 02:51:54 am
content: On my unit I do not see green during power up, but I do see it on power down. I checked my batteries and saw that they were a bit low. Fresh batteries do not change the behavior of the Power LED.

author: Electro Detective
author_rank: Super Contributor
timestamp: June 08, 2017, 02:56:39 am
content: Have a look in the manual, there is battery and powering related watchits in therewww.eevblog.com/wp-content/uploads/2017/03/HVP70-UserManual.pdf

author: piranha32
author_rank: Unknown
timestamp: June 08, 2017, 02:59:20 am
content: Quote from: Electro Detective on June 08, 2017, 02:56:39 am"When the voltage of the cells become too low, the power indicator on the panel will flicker."The manual does not say anything about red/green LED.

author: Electro Detective
author_rank: Super Contributor
timestamp: June 08, 2017, 03:12:22 am
content: "When I turn power on with provided batteries installed..."I'd be checking those out, and trying a new set in there, and see what happens.

author: EEVblog
author_rank: Unknown
timestamp: June 08, 2017, 03:18:44 am
content: The probe confusingly flashed GREEN when the battery voltage is low, and sold RED when the batteries are OK. This has been in their probe designs since their first probe the SI-9001I asked them about changing it for my probe but they said it would delay the already delayed project, so I just left it.I would not worry if it flashes green at power on, that could just a be start-up issue. But it could be an indication that they have marginal life left.

author: piranha32
author_rank: Unknown
timestamp: June 08, 2017, 03:31:17 am
content: Thanks for clarification. I used the batteries which came with the probe, so I wouldn't expect them to be almost DOA. The green flash must be caused rising/falling voltage after the power switch.

author: Zbig
author_rank: Frequent Contributor
timestamp: June 08, 2017, 08:19:37 am
content: Quote from: EEVblog on June 08, 2017, 03:18:44 amBut why...?Things like that make me immediately suspicious of all the other design decisions made by guys who thought this was a good idea.

author: Electro Detective
author_rank: Super Contributor
timestamp: June 08, 2017, 10:22:51 am
content: It can't be as bad as switching from MA to uA in DC mode on a Fluke 87Vwhich keeps defaulting back to AC every time you are trying to lock down a final reading for example,or playing it safe and start in the higher range and work down.Add the Autorange pos to your woes as welland this is why a manual range click clack meter still RULES in some scenarios!I mean seriously, how many dudes measure AC current with a Fluke 87V compared to TOO MANY times on DC ?Someone notpuff puff passingat the design discussions ?