What?? New Aneng AN888S combines Multimeter, Bluetooth speaker, and clock

[shapirus]

I seem to like it, in a weird way. I don't know why. I don't want to.

[Fungus]

It beeps even with the volume set to zero.   The volume is only for BlueTooth audio.

Does it beep through the speakers?

What about continuity test? Is that through the speakers?

[Andrew_Debbie]

I seem to like it, in a weird way. I don't know why. I don't want to.

I understand.   I had to have one.

[Andrew_Debbie]

It beeps even with the volume set to zero.   The volume is only for BlueTooth audio.

Does it beep through the speakers?

What about continuity test? Is that through the speakers?

I think so but I've never bothered to check.   I haven't taken mine apart (what??) but there are teardowns on the 'net.  Google should find them for you.


In other news there are several reasonbly prices Thurlby Thandar or Aim-TTi  DMMs on eBay.     1604  1704, and a few 1905a. 

The 1604 was "low cost"  40,000 count bench meter .08% basic accuracy from the LED era.   Newer ones have Aim-TTi branding. Recently discontinued. Brand new ones were £257 when I bought my AN-888s.

The 1705 is a bit newer design "low cost" meter  bench - LCD, dual display,  12,000 count  .04% basic accuracy.   Recenly discontinued.

The 1905a is old,  mid '80s. maybe?    5 1/2 digits, .015% basic accuracy with a hidden menu for 6 1/2 digits. (no idea of the 6 1/2 is meaninful or just for fun)

I've got a bid snipe on one of them, but won't mind if someone outbids me.  I don't need another DMM.

[Papperskatt]

Does it beep through the speakers?

What about continuity test? Is that through the speakers?

You might have found your answer by now, but in case that you haven't: the board have a piezo speaker that it uses for beeping and continuity.

[Papperskatt]

Hello!
 
Some info on my ZT-5566 (aka AN888S aka RM123).
 
Here goes its factory EEPROM:
 
The value at 0xF9 is auto-off timeout, in minutes. I set it to 0x3F, now it stays on for 1 hour.
 
If you power-on the unit (button at the back) while depressed "REL" button, it will stay ON forever, but will beep every [ timeout ].

I'm trying to change the auto power off on my ZT-5566 but don't have any success. No matter what value I change 0xF9 to it still beeps and turns off after 15 minutes! Does anyone have any idea what the problem might be?

Here is my factory dump:

Code: [Select]

Lo- 00─01─02─03─04─05─06─07 ─08─09─0A─0B─0C─0D─0E─0F
00: FF FF FF FF FF FF FF FF  FF 52 00 FA 00 00 BE 03
10: 10 17 20 4E 52 03 6E 50  64 4B 3C 3C 0A FF 40 FF
20: 11 9B 0E 7E 64 00 96 00  00 80 00 80 98 7E B7 8D
30: 4E 02 09 4E 02 09 77 FD  0A 9A 19 0A 00 00 0A 00
40: 00 01 00 01 00 07 98 00  64 00 64 00 64 00 00 00
50: 00 80 9D 7E D8 8D 00 80  00 80 00 80 00 80 00 80
60: 6F 7F 00 80 0A 00 05 2C  00 00 00 00 00 00 00 00
70: 62 80 00 80 4D 88 E0 7C  18 01 00 00 00 00 00 00
80: 00 00 00 00 00 16 00 10  00 0C 00 07 17 01 12 03
90: 00 00 00 00 00 00 00 11  00 0D 00 0A 00 02 00 04
A0: 00 00 00 00 00 00 00 00  00 00 00 0B 00 13 00 00
B0: 00 00 00 00 00 00 00 00  00 00 00 00 00 15 00 00
C0: 0D 00 02 10 00 00 00 00  00 00 00 00 20 00 03 10
D0: E2 7F 00 80 00 80 00 80  00 80 03 05 0D 00 02 20
E0: 00 80 00 80 00 80 00 80  00 80 24 80 0C 80 A0 7F
F0: 00 80 FF FF FF FF FF FF  77 0F 00 00 00 00 00 00
I have also tried changing 0xFB as per Kerry Wongs translated datasheet for the DTM0660L chip, but that only result in "ERRO".

By the way, I was surprised to see that my meter don't have the DTM0660L chip, it's got the DM1109EN instead. And I assume that the chances of finding the datasheet for that chip is more or less hopeless...