SOLD FS( EU / World ) ASL F250 thermometer in GS no probes Price to clear - Page 1
Forum section: electronics / general

author: Overspeed
author_rank: Frequent Contributor
timestamp: September 10, 2024, 10:20:12 am
content: HelloFor sale Thermometer ASL F250 ( rebranded Gallenkamp / Sanyo )good shape with some paint scratch on the top coverNo probes , ( 4 wires Pt100 )Price 350 EuroNote picture are labelled F25 but that a F250 . I have also a F25 so no need two thermometersShip by UPS or tracked Post office parcelRegardsOS

author: nfmax
author_rank: Super Contributor
timestamp: September 10, 2024, 11:21:37 am
content: Just to check, is this a working instrument? Have you tested it with a PRTof some sort, or a standard resistor?

author: Overspeed
author_rank: Frequent Contributor
timestamp: September 10, 2024, 11:25:02 am
content: HelloYes I will test it again and take pictures ....I will connect a simulator AOIP but not run any calibrationRegardsOS

author: Overspeed
author_rank: Frequent Contributor
timestamp: September 10, 2024, 01:47:39 pm
content: HelloThe pics of a quick test with a 0.1C simulator from AOIP ( as it as I am overloaded ) , simulator was connected to rear panel connectorBoth channel with unit change / values changeRegardsOS

author: nfmax
author_rank: Super Contributor
timestamp: September 12, 2024, 07:39:11 pm
content: Those errors seem a bit large, unless the simulator is out of specification. What does your F25 read when connected to the simulator? Were you using a 4-wire connection?Oh, and do you have the key for the calibration enable switch?

author: Overspeed
author_rank: Frequent Contributor
timestamp: September 13, 2024, 05:33:21 am
content: Hellothis simulator is basic simulator +/- 0.1 C from the 80's and not a calibrator , the purpose was to show this ASL works and is not '' out of order ''Asap I have time I will connect a 100 ohm 0.01 % or any other valueRegardsOS

author: Overspeed
author_rank: Frequent Contributor
timestamp: September 15, 2024, 08:03:42 am
content: HelloI have check with other simulator , I link the Time Electronic PDF , hard to locate simulator better than 0.1 C except in the high price range as ADR-3204GR Precision Programmable Resistance Box from Alpha ElectronicsVishay propose foil resistor with 0.005 % , I have one in 175 Ohms I will make a trialI sale my ASL F250 as it I don't want to spend money in calibration costsRegardsOS

author: bastl_r
author_rank: Regular Contributor
timestamp: September 15, 2024, 05:41:09 pm
content: QuoteFor me, the values seems correct because there are no 4 wire connections.

author: nfmax
author_rank: Super Contributor
timestamp: September 15, 2024, 07:50:09 pm
content: Certainly, the errors are in the right direction for a two-wire effect. I think the risk might be damage to the reference resistor, or a self-balancing bridge issue. Both would be difficult and/or expensive to fix

author: Overspeed
author_rank: Frequent Contributor
timestamp: September 16, 2024, 08:38:02 am
content: HelloOk I will make the test with a 4 wire resistor to provide the proof of the displayed valueRegardsOS

author: Overspeed
author_rank: Frequent Contributor
timestamp: September 16, 2024, 03:07:29 pm
content: Quote from: nfmax on September 15, 2024, 07:50:09 pmHelloPoint 1 ) My AOIP simulator is a two wires model but the connection ( rear and front ) are 4 wires and I have respected the wiring , that impossible to read resistor value with only two wires connected as that mandatory to provide current to the resistor and measure the voltagePoint 2 ) The ASL F250 can be ''bespoke'' calibrated and that possible to change calibration regarding the probes you fit on , that clearly explain in the doc in PDF I have linked ( page 13 to 27 in detail )Point 3) I always respect the measuring equipment .Point 4 ) I have used this ASL F250 only to measure delta temperature variation so I never change the initial calibration setupRegardsOS

author: Overspeed
author_rank: Frequent Contributor
timestamp: October 16, 2024, 01:05:36 pm
content: HelloReduced to 625 EuroRegardsOS

author: Overspeed
author_rank: Frequent Contributor
timestamp: December 05, 2024, 11:17:10 am
content: HelloPrice reduced to350 EuroI need to found my new projectRegardsOS