Configuration of standard instruments in the instrument calibration room of medium-sized fertilizer plants
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Does that teacher have a plan for equipping the instrument calibration room in a medium-sized fertilizer plant with standard instruments? Equipment selection form. Thank you
There’s no such thing, right? It mainly depends on what testing qualifications your factory has. Generally, only pressure gauges for calibration are available. All other items that need to be calibrated are sent to the metrology bureau for calibration. I just need to prepare some tables for verification and for making decisions when dealing with faults. Piston pressure gauge, precision meter. UJ33 or higher-grade millivolt signal generator, standard resistance box, comprehensive tester, four-and-a-half-digit or higher-grade digital multimeter!
Instrument calibration is not related to the size of the factory, but rather to the number of instruments； For large quantities, if the cost of sending samples for external calibration is higher than the cost of establishing one’s own standards, it is possible to purchase standard equipment to establish such standards and carry out the calibration oneself; otherwise, the samples should be sent out for external calibration. Different instruments use different standard devices for calibration. For example, pressure gauges can be calibrated using a pressure pump in combination with a precision pressure gauge, or they can be calibrated using a pressure module, a pressure pump, and a digital pressure tester; such devices can also be used to calibrate pressure transmitters and other pressure-related instruments ； Temperature instruments can be calibrated using standard resistance boxes, potentiometers, or digital calibrators, among other methods~~~
Reply to 2# zzyslhj: The digital multimeters we use on site have 4.5 digits of precision, while those in the meter calibration room should have at least 6.5 digits of precision; if possible, 8.5-digit models should be used!
Calibration mainly involves the selection of pressure gauges, pressure transmitters, differential pressure transmitters, thermal resistors, thermocouples, as well as standard instruments or calibration benches for heating furnaces. Thank you.
A digital multimeter is needed for calibrating transmitters, thermal resistors, and thermocouples!