Process calibrators .. Reliability .. features .. opinions - Page 1
Forum section: electronics / general

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: October 08, 2011, 05:17:33 am
content: The Process calibrators is one totally unexplored area by me, at list so far.But I would like to learn few things about them.Maybe I would need one in future, and so I have to form an opinion.As far I know they can produce DC volts & current, square waves - duty cycle .My first question would be, what features other than the ones that I all ready know, considered as must have in one good Process calibrator?The second question would be what happens about the calibration of the Process calibrators,are they more robust than the common DMM about keeping their accuracy ?I will probably come with more questions, but later on.

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: October 10, 2011, 07:44:19 pm
content: (Read 108 times)and no reply !!It looks that I am not the only one, who has no idea about the Process calibrators

author: Achilles
author_rank: Regular Contributor
timestamp: October 10, 2011, 07:55:11 pm
content: Me too, but I already stated that somewhere else.As far as what I think it is a high precision Voltage/Current source and Multimeter. I could imagine a use in calibrating amplification circuits or testing the Voltage drain over some resistor networks and sth. like that.There must be somebody around here actually using them or not?! Would be interested too in a little bit of clarification.

author: Unknown
author_rank: Unknown
timestamp: October 10, 2011, 09:16:49 pm
content: The ones I know are mostly aimed at 0-20mA/4-20mA current loop outputs. They have fairly accurate a current source. Some can also do DCV, but they're intended for calibrating industrial sensors/transmittors (eg. a pressure transducer), they're not highly accurate metrology grade calibrators. Hence the word process calibrators.

author: Magicmushroom666
author_rank: Contributor
timestamp: October 24, 2011, 04:41:50 pm
content: I use these types of equipment daily, and have tried many different types.Without a doubt, the best one by far i've used or come across is the Beamex MC2. Its both very easy to use, and still very powerful; a real all-in-one device. I know when carrying this baby i'm never going to get that thought "oh damn if only i had my XXX calibrator/tester"If you want something smaller and simpler just to do current, the Druck UPS III is a lovely little device and much more affordable.

author: ThunderMink
author_rank: Contributor
timestamp: October 24, 2013, 09:31:25 am
content: Greetings from FinlandI am an service technician at Beamex in jakobstad and for instance the MC2 calibrator that Magicmushroom666 mentioned is indeed a very good field calibrator, my job mainly consist of servicing MC2, MC2-IS, MC3, MC4, MC5 and MC5-is calibratorsHere are some specs of the MC2 if someone is interestedElectrical Measurments -1 ... 60V DCRange Resolution 1 Year Uncertainty ±±0.25V 0.001mV 0.02%RDG + 5uV±(0.25..1V) 0.01mV 0.02%RDG + 5uV±1..25V 0.1mV 0.02%RDG + 0.25mV±25..60V 1mV 0.02%RDG + 0.25mVCurrent Measurment ±100mARange Resolution±25mA 0.0001mA±(25..100mA) 0.001mALoop supplyFeature SpecOut Current >25mA, short circuit protectedOut Voltage 24V ± 10%Output impedance in HART compatibility mode is 300 ohm ±20%Frequency Measurment 0.0027 ... 50000 Hz (0.5-5Hz 0.00001 Hz)(5000 ... 50000 Hz 0.1Hz)Pulse Countingrange 0 to 9 999 999 pulsesinput impedance > 1MohmTrigger level -1 ... 14V in 1V stepsSwitch Testtrigger level -1 ... 14VElectrical GenerationmV Measurement (T/C-terminals) -25 ... 150mV0.001mVmV Generation (T/C-terminals) -25 ... 150mV0.0001mVVoltage Generation -3 ... 12V-3 ... -0.25V 0.1mV± 0.25V 0.01mV0.25 ... 12V 0.1mVmA Generation (Source/Sink)0 ... 25mA 0.0001mAResistance measurement 0 ... 4000 ohmResistance Simulation 0 ... 4000 ohmFrequency Generation 0.0005 ... 10000 HzOutput amplitude positive square wave 0 ... 12VppPulse Generation 0 to 9 999 999 pulses 0 ... 12VppTemperature Measurement and SimulationPt50 ... Pt1000, -200 ... 850 °CNi 100, -60 ... 180 °CNi 120, -80 ... 260 °CCu 10, -200 ... 260 °CThermocouple Measurement and simulationType B, R, S, E, J, K, N, T, U, L, C, G, DInternal Reference junction -10 ... 50 °C1 year uncertainty 0.25 °C

author: quarros
author_rank: Regular Contributor
timestamp: October 24, 2013, 02:12:41 pm
content: Quote from: Kiriakos-GR on October 10, 2011, 07:44:19 pmYepp but also there are some people like me who scored one for cheap but don't have a clue as what to really use it for.(Other than being a useful calibration standard for my 3 1/2 digit multimeter's)