| Products > Test Equipment |
| AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter |
| << < (115/172) > >> |
| floobydust:
I meant the DMM MCU external serial data in/out, as I thought that the MCU firmware does a bulk write to EEPROM. The EEPROM SPI port cannot be shared with the DMM IC, you get bus contention if you try to communicate with the EEPROM, unless the DMM IC is held in RESET. |
| ocw:
I found similar capacitor test frequencies on the Ragu 17B+ and the ANENG AN8008: 17B+ auto-selection of 0.58 Hz - 29.4 kHz AN8008 auto-selection of 0.59 Hz - 27.5 kHz Installing the 9 volt battery is confusing on the 17B+. I didn't see anything on which way to install it. The battery positive terminal goes to the left (the MAX/MIN button side). |
| MacMeter:
--- Quote from: joeqsmith on September 07, 2017, 09:30:14 am --- --- Quote from: ocw on September 07, 2017, 03:15:52 am ---I received a Ragu 17B+ multimeter today. I see that Amazon raised its price to $11.99 while it is going for around $15 from several American eBay sources. .... It's a nice meter and doesn't have the missing current ranges like the AN8008 does. But, it doesn't have the ANENG's nice small size. It will be useful for some tasks. --- End quote --- Larger fuses but looks like the same basic problem with the input. I would be more concerned with mA fuse arch to return. In your picture, it looks like the input it directly tied to common. :-DD --- End quote --- I bought the Ragu, mostly because it was only $10, and I can just leave it on the work truck, and when I make a battery eliminator for it, I can leave it on in FREQ mode to monitor the 1800a mobile tractor generator. Useful sometimes having a meter you don't care about as long as does the job. While I will never use it for current readings, would it still be wise if "possible" to put one of my spare BM235 fuses in there? |
| MacMeter:
--- Quote from: ocw on September 08, 2017, 02:25:05 am ---I found similar capacitor test frequencies on the Ragu 17B+ and the ANENG AN8008: 17B+ auto-selection of 0.58 Hz - 29.4 kHz AN8008 auto-selection of 0.59 Hz - 27.5 kHz Installing the 9 volt battery is confusing on the 17B+. I didn't see anything on which way to install it. The battery positive terminal goes to the left (the MAX/MIN button side). --- End quote --- I had to look closely deep inside with a flashlight to see the tiny mold marks for battery orientation. Then used a silver sharpie to make a legible mark. On mine the "Select" button does not seem to function as expected in some modes. If you to turn off the "Auto 15 minute shutdown" you have to hold the select button down before turning the meter on. In "Hz" mode further up the dial, the select button did nothing, but clicking on the Hz button itself cycled through the options. I suspect there are other user interface issues that were not fully tested before this was released, but for $10, I didn't have high expectations to begin with. |
| stj:
--- Quote from: floobydust on September 07, 2017, 06:34:55 pm ---I meant the DMM MCU external serial data in/out, as I thought that the MCU firmware does a bulk write to EEPROM. The EEPROM SPI port cannot be shared with the DMM IC, you get bus contention if you try to communicate with the EEPROM, unless the DMM IC is held in RESET. --- End quote --- the meters i'v looked at have programming pads for the mcu, it's possible they have a passthrough mode, or a generic table they write to a blank eeprom. |
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