#779

[@Evanturar]

I work in industrial automation. Process calibrators are designed primarily for simulating various transducer signals to the control system or control instrument. 4.20mA is an industry standard for longer range temperature, pressure, vibration, flow sensors etc. 0-5, 0-10, 1-5vdc are also common but for lower distances as they are subject to voltage drop and induced voltages. I have never understood the reason for the Fluke extreme cost for such a basic function. A high quality meter with a basic unit like this is all you will ever need.

[@robber576]

The use is industrial, nearly every sensor,controller or loop in the industry works on either 0-10 volt or (0)4-20 mA. So if you want to test,work or adjust anything in industrial electronics you need a voltage/current source 0-10vdc/0-20 mA

[@micksshop]

I use one of those units for testing HVAC motor actuated valves and other control circuits that use 0-20ma for variable drive.

[@Evanturar]

Also: Handy for testing output responses of PID controls based on input influences. Watch integral response with rapid changes, or slow changes. I would buy this one in a minute. Nothing wrong with it.

[@djneon12]

there is also another versioncalled the "LB02G" process calibrator. looks the same but can also do -10v tot + 10V. those are uncalibrated so you need to calibrate them first before using them. the DAC looks to be a texas instruments DAC7xxx or DAC8xxx series. dual output. procesosr is a NUVOTON N76E003AT20 above it is a 74HCT04D and the display driver is a TM1650. other ic's parts used: XL1509, TP4056

[@djneon12]

this guy has opened one up and the chip markings arre not remove. so that is where i get the info from :) kzbin.info/www/bejne/jmjUg6V9rsuhqbM

[@IMSAIGuy]

thanks!

[@andreytem9076]

Hi! Have You metodic of calibration of LB02 (LB02A)?

[@Spinafication]

These units are great for simulating 4-20mA process signals from pressure, temperature, RH% etc industrial transmitters. The 4-20mA is typically past through an internal or external 250 ohm or 100 ohm resistor and a voltage is read by the PLC or data logger. Many of these industrial transmitter outputs are only 12bit or less, so supper accuracy might not be an issue for some. Sure cheaper than my Fluke 744.

[@msncom5490]

well? how do i get connect it and thx to u

[@m_a_s6069]

More than enough room to put a batter underneath the board. A 503450 battery (1000 mAh) fits perfectly.

[@rogergreenwood1536]

Agree with the incredible value, these used to be $500 upwards and they only did current - you had to supply your own 250ohm resistor to get 1-5V. For hobby/field use pretty hard to beat especially with the display included. I have a mV/mA source from Time electronics (model 1030) that cost over £350 new today + extras, they describe it as "low cost" :-)

[@frankowalker4662]

It's well built and very busy inside at a good price. But I can't think of a single use for it. LOL.

[@maxpetrelli2142]

Hi, just discovered your channel and I already love it ! Can you please check how noisy is the calibrator output either voltage and current mode? Thanks :)

[@IMSAIGuy]

I'll add that to my list

[@paulcohen1555]

The PCB round traces are looking like manually laid with tape in the seventies.🧐

[@ivolol]

You can "fillet" traces in kicad, and likely most of the other EDAs, to convert an angled intersection into a nice curve

[@clems6989]

Wow ! There is no need for all of this complicated construction. Talk about "overkill"....dang

[@electronicengineer]

Interesting device! Again IMSAI Guy, thank You for sharing it with us. I wonder if this unit is intended for use as an 4 - 20 mA instrumentation calibrator, for use in testing 4 - 20 mA sensor devices/loops for process control or remote sensor monitoring equipment... It is clearly well designed (with accuracy calibration) and quite well made. I believe that this device is a "steal" for $15.00 USD! Thoughts on IMSAI Dog. I hope that he is feeling well. Fred

[@jdmccorful]

Would agree on value. Wonder if it could be used for pneumatic valve work? Good one Sherm! Enjoyed watching. Thanks.