Ex-Demo Agilent U1241's for sale in Oz - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: January 08, 2013, 11:24:32 am
content: For those in Oz interested.Charles at TrioSmartCal showed me a bunch of used and "ex-demo" Agilent U1241's he has available:Used ones:http://www.triosmartcal.com.au/1164-agilent-u1241a.html$115exAnd ones that are essentially new-in-box for $169ex:http://www.triosmartcal.com.au/2998-agilent-u1241a.htmlInc case and new test leads.Good value I recon. But YMMV.Dave.

author: gnif
author_rank: Unknown
timestamp: February 21, 2013, 08:21:21 am
content: Awesome, just bought one of the 2nd hand jobs. I was looking at buying a BK 2712 (also $115) as these higher end meters were out of my budget, this couldn't have come at a better time.

author: GeoffS
author_rank: Unknown
timestamp: February 21, 2013, 09:59:22 am
content: I should buy a 'real' multimeter instead of the multiple Jaycar specials I have.I'm sure I can find a review on the Agilent model

author: uprightsquire
author_rank: Contributor
timestamp: February 21, 2013, 10:26:22 am
content: I was just in there today, thinking 'why don't they have any multimeters (or other gear) that isnt their homebrand'

author: gnif
author_rank: Unknown
timestamp: February 22, 2013, 05:06:53 am
content: My meter just arrived, very fast delivery.The unit is in pretty good shape, except the rear stand has been snapped through the horizontal cross member where it is hinged. Attempting to use the hinged part of the stand causes it to fall off. It also appears that this meter has been dropped on it's corner pretty hard as the rubber has been damaged, but I guess that is what you would expect of a used meter, but I did not expect the stand to be broken.

author: gnif
author_rank: Unknown
timestamp: February 22, 2013, 05:49:38 am
content: Since I can not find a review of the meter, I will post what I can.The case is very ridged, and like the selector switch feels quite nice, but not as nice as a fluke. No annoying beeps/music, etc and it's auto-range is pretty decent, but kicks in a little early when on ohms and measuring a 95-99k resistor, setting the range manually though allows you to gain the additional precision.It has a nice fast update, I like the large digits and it has a nice and quick display update. It does not seem to suffer from any of the firmware issues the other models have experienced. It allows you to check the battery level which is nice, but I also found an undocumented feature where if you hold the back-light button and the Hz button when turning it on, it will show you the battery voltage. Not sure why they do not allow you to see this on the documented BAT feature.The rear stand seems to be made of a very weak inflexible stand as evidenced by the broken cross-member and does not feel well made at all. It runs on 4x AAA, but fuses are not accessible without taking the back off the meter (which is a little strange as there is room for it, and the battery cover has enough room to have allowed them to have provided access to the 440mA fuse). The battery cover has a captive screw which is nice, and uses a threaded insert.The case has 4 long threaded screws with threaded inserts which is very nice. To gain access to the 11A fuse you need to fully dismantle the unit, which involves removing the 440mA fuse, and 4 self tappers, so a bit of a chore to get to it should it need changing. A small worry is that one of the threaded screws that hold the terminal post daughter board, which is also the connection for the micro amps input is about 3mm from the 440mA fuse holder terminal.Internal contacts are all gold plated, and has good input protection via heavy 0.1k resistors, PTCs, and then connected to some AG20 TAYIO Ceramic Resonators. The micro is a Samsung S3P825 80pin TQFP with a 2.4576Mhz crystal and uses a TI ADS1242 (24-Bit Analog-To-Digital Converter). The board also has a Atmel 24C64 (64K (8192 x2-wire Serial EEPROM).I can not see any unpopulated components inside, so I would suspect that you could upgrade this unit to a U1242 with a firmware change, possibly via the EEPROM, but I suspect the EEPROM is just for user settings and value storage.Edit: The S3P825A is a microcontroller with a 48K-byte one-time-programmable ROM embedded. So if it does allow for firmware updates, it could very well be possible that it is in the Atmel EEPROM.Edit2: The 440mA fuse holder is around 1mm to the screw when the fuse is installed.Edit 4: I have confirmed that the EEPROM contains the model identifier for the meter, by shorting out the SCL and SCA lines the meter powers up and has all the features of the U1242. Now to dump the EEPROM and see if I can make this change properly.

author: Ross_ValuSoft
author_rank: Newbie
timestamp: February 24, 2013, 06:12:56 am
content: Quote from: gnif on February 22, 2013, 05:06:53 amWhat accessories came with the unit?