Multifunction calibrator - Page 1
Forum section: electronics / testgear

author: JtroTechAB
author_rank: Contributor
timestamp: February 21, 2019, 12:17:11 pm
content: Hello,Looking for calibrator with following specs:should have Source feature1) RTD2) TCmV: 0-10VmA: 0-20/40mAalso suggest If any OEM& any reliable & economical models.

author: threephase
author_rank: Regular Contributor
timestamp: February 21, 2019, 02:50:40 pm
content: If I am reading your requirements correctly, it is the one to be able to source up to 40mA that is going to put you into a world of hurt. This is an unusual requirement and only comes with the more serious industrial apparatus.There is the Time 1090 that can source up to 80mA. Then make good reliable test apparatus in my experience, but they tend to have an old, clunky look and feel to them and are not to everyone's taste.https://www.timeelectronics.com/portable-process-pressure-instruments/1090-portable-process-calibrator/The other I am familiar with is from Beamex, now the MC6. They are used on many of our plants and have a good reputation, you will be talking serious money though, as it is a complete calibration solution.https://www.beamex.com/calibrators/mc6-calibrator/Those are two I am familiar with, another couple I have found that seem to offer the functionality are;MC50.2, MC75.2 or EC25, all from Sika. I do not know anything about them. They seem to offer similar functionality to the Time unit, but are slightly higher in price.https://www.sika.net/en/products/test-and-calibration-instruments/simulators/multifunction-simulators.htmlThe final one is the PIE850, again I know nothing about them. In my country they seem to be between the Time and Beamex units in terms of price, but similar functionality to Time.https://piecal.com/product/10-50-ma-multifunction-process-calibrator-pie-850/If you don't need to source 40mA and only need to measure, then you have a lot more options open to you that can only source up to 20mA/24mA.Kind regards.

author: casinada
author_rank: Frequent Contributor
timestamp: February 21, 2019, 05:41:48 pm
content: https://www.fluke.com/en-us/products/calibration-tools/multifunction-calibratorsNot the cheapest for sure

author: TurboTom
author_rank: Super Contributor
timestamp: February 21, 2019, 07:16:55 pm
content: Just recently I got myself an "el-cheapo" calibrator but was quite amazed of its accuracy. It's the BrightWin (manufacturer?)LB02.Build quality is more than acceptable and accuracy-wise it meets and mostly surpasses its specs by quite some margin. It's enclosed in an ultra-strong casing and comes in a nice semi-rigid box with a zipper. The probe wires are nothing to phone home about but for a calibrator, I anyway prefer just a set of banana cables with alligator clips at the other ends...The compact size and the operation with an integral USB-chargable LiPo battery makes the instrument ideal for field applications... It really makes the life of an EE (or physicist that is...) a lot easier. The user interface is something you've got to get used to but once familiar, it's okay-ish. I guess that's the trade-in for the small form factor of the instrument.Please find attached a photo of the PCB inside the unit.Cheers,ThomasEdit: Typos

author: JtroTechAB
author_rank: Contributor
timestamp: February 22, 2019, 05:08:19 am
content: Surely this model BRT LB02 falls in budget. And the reviews are also good.any source explaining the working of this model in detail would be more helpful.In order to assess its performance.and source for buying it for fast delivery and from cheaper shipping point of view.Thanks for the advice. Also further any other model suggestions are also welcome.

author: coromonadalix
author_rank: Super Contributor
timestamp: February 22, 2019, 11:34:00 am
content: the LB02 seems pretty good for its price range ... bookmarked it.

author: splin
author_rank: Frequent Contributor
timestamp: February 24, 2019, 03:29:40 am
content: Any suggestions as to what all those optocouplers might be used for? Just found that they are actually bidirectional photo switches - TLP227A so used as relays for signal switching.

author: TurboTom
author_rank: Super Contributor
timestamp: February 24, 2019, 02:26:20 pm
content: FYI, the major components of the LB02 are:ADC: Titan Micro TM7707 (24 bit)Reference: TI REF5025DACs: Linear LTC1658 (14 bit) and LTC8043 (12 bit multiplying)MCU: Microchip (Atmel) ATMega 329PAAmong the analog jellybean stuff, there are two low offset OPAMPS: TI OPA2277 and AD OP07.An then of course there's the abundance of Toshiba TLP227A photo relays for range switching.There has to be some more stuff on the other side of the PCB (at least a step-up converter to generate the 24V from the single LiPo cell) but I didn't bother to remove it from the casing since most of the relevant semiconductors appear to be visible directly (was basically interested to find out what reference and ADC they used).Altogether, especially considering the price, the LB02 is a decent choice. Here are some measurements of the calibrator functions (measured with Rigol DM3068):Voltage out:Set - Measured AVRG - Standard Deviation 1 - 0.99977 - 902 - 2.00208 - 1253 - 3.00186 - 1304 - 4.00347 - 1065 - 5.00245 - 1306 - 6.00304 - 1107 - 7.00358 - 1258 - 8.00302 - 989 - 9.00453 - 12710 - 10.00531 - 13011 - 11.00459 - 1151m - 0.984m - 1.410m - 9.982m - 0.9950m - 49.996m100m - 100.021m - 1.22Current out:Open Loop voltage: 22.87VSet - Measured AVRG - Standard Deviation 4 - 4.00058 - 2208 - 7.99945 - 22012 - 11.99721 - 25016 - 15.99461 - 20020 - 19.99645 - 27024 - 23.99458 - 250Resistance out:(Connection cables zeroed out)Set  - Measured 20 - 20.06650 - 49.985100 - 99.963200 - 199.922400 - 399.945Resistance test open loop voltage: 2.50098VEdit: somehow pressed a key that caused the post to be published before I finished it...

author: m72
author_rank: Contributor
timestamp: July 24, 2020, 02:18:40 pm
content: Hello!New version is LB02A (LB06A with HART/ModBus communicator).Reference: Analog Devices ADR03A (2.5V)ADC: Titan Micro TM7707 (24 bit)DAC: Texas Instruments DAC88301 (16 bit)MCU: STM32F103VCT611Vset 34401A1 0.9997052 1.999613 2.999864 4.000025 5.000176 6.000287 7.000268 8.000439 9.0005110 10.0007011 11.00085110mVset 34401A10 9.989520 19.992330 29.994940 39.995950 49.999160 60.000770 70.004180 80.006790 90.0087100 100.0113110 110.014224mA sourceset 34401A @100 Ohm shunt4 4.001058 8.0008712 12.000616 16.000320 19.999424 23.998424mA sink @100 Ohm shuntset 34401A4 4.000968 8.0006312 12.000216 15.999420 19.998624 23.9973With best regards, Mikhail.

author: jorgemef
author_rank: Regular Contributor
timestamp: February 14, 2022, 04:21:11 pm
content: Hello,I saw in BRIGHTWIN page the LB03. Half price, half digits. Is it worthy for hobbyists? What is the reference chip used inside?I am in doubt between that one or a cheaper LB01 or a precalibrated LM399 board or even go for the LB02.For now I just need it for calibrating my multimeters and check some circuit references as for passive I have a DE5000 which I trust.Cheers,Jorge

author: jorgemef
author_rank: Regular Contributor
timestamp: December 02, 2022, 12:25:21 am
content: I finally opened my LB02A which I purchased in Aliexpress.Reference: TI REF5025ADC: Titan Micro TM7707 (24 bit)DAC: Texas Instruments DAC88301 (16 bit)MCU: STM32F103VCT6Set (V) Read (BM969S) Keythly 2000 HP 344011 0,99888 1,000025 0,9989032 1,99933 2,00001 1,999452,5 2,49968 2,50026 2,499743 2,99970 3,00016 2,999804 4,00016 4,00076 4,000295 5,00057 5,00128 5,000796 6,0006 6,00146 6,000977 7,0011 7,00155 7,001387,5 7,5015 7,50196 7,501408 8,0017 8,00197 8,001579 9,0024 9,00242 9,0019910 10,0031 10,00277 10,0022811 11,0035 11,00291 11,00308Set (mV) Read (BM969S) Keythly 2000 HP 344011 0,952 0,9780 0,962110 9,950 9,9772 9,958620 19,952 19,9746 19,961430 29,953 29,9766 29,962440 39,956 39,9782 39,964650 49,958 49,9825 49,969360 59,959 59,9841 59,969870 69,962 69,9869 69,971480 79,966 79,9882 79,972990 89,973 89,9935 89,9751100 99,974 99,9962 99,9766110 109,976 109,9983 109,9805

author: Taimer81
author_rank: Regular Contributor
timestamp: May 23, 2025, 12:09:50 pm
content: Hello ! Please tell me if the LB06 (LB06) has an internal calibration function ?