Accuracy and response characteristic test

Test Background

The measurement accuracy and response speed of the sensor directly determine the adjustment quality of the CDU control system. Insufficient accuracy or response lag may cause temperature/pressure overshoot, affecting the operational stability of the chip.

Test Introduction

The accuracy and response characteristic test comprehensively evaluates the measurement performance of the sensor through accuracy testing, linearity testing, zero-point drift testing, response time testing and hysteresis error testing.

Testing Objectives

Verify the measurement accuracy of the sensor within the full range

Evaluate the linearity and repeatability

Measure the response time constant

Detect zero-point drift and temperature drift

Ensure that the dynamic measurement performance meets the control requirements

Test Standards

GB/T 30121 Industrial platinum resistance thermometers

GB/T 15478 Test methods of the performances for pressure transducer/sensor

ISO 5167 Flow Measurement Standards

Customer-defined accuracy class requirements

Applicable Products/Fields

Suitable for the selection, calibration, and acceptance of various sensors in liquid cooling systems.

Test Content

Accuracy test: Multi-point calibration, comparison with standard source

Linearity test: Deviation between the fitted straight line and the actual curve

Zero drift test: Zero point change during long-term power-on

Response time test: Time for the output to reach 90% under step input

Hysteresis error test: Maximum deviation in forward and reverse strokes

Project Advantages

High-precision standard source (temperature: 0.01℃, pressure: 0.05%)

Automated multi-point testing system

Provides calibration certificates and performance curves

Laboratory Configuration

Constant temperature bath (precision temperature calibration)

Pressure controller/piston pressure gauge

Flow standard device (weighing method/standard meter method)

Data acquisition system

High-precision multimeter

FAQ
Q: What impact does the response time of the temperature sensor have on control? A: Response lag can lead to control delay, causing temperature overshoot or fluctuation. The required response time constant is usually ≤ 10 seconds.