A portable borehole temperature logging system using the four-wire resistance method

Erkan, Kamil; Akkoyunlu, Bulent Oktay; Balkan, Elif; Tayanç, Mete

doi:10.1088/1742-2140/aa7ffe

Cited by 8 publications

(7 citation statements)

References 7 publications

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“…An important disadvantage of the passive bridge presented in Figure 1 is the fact that the output voltage ∆U (A−B) according to Formula (6) does not represent the relations given in ( 9) and (10). This passive bridge limitation evoked considerations about an active resistance bridge using an operational amplifier presented in Figure 2 [10,13]. This solution permits stabilizing current I = I const flowing through the thermoresistor R t .…”

Section: Active Measuring Bridge With Current Stabilizationmentioning

confidence: 99%

“…The amplifier marked as WOx in Figure 2 acts as a current source, whose task is to stabilize the current in the bridge branch, including the resistor Rt. On the other hand, the instrumental amplifier marked as WI acts as a scaling circuit for the output voltage representing the measured temperature [13,14].…”

Section: Active Measuring Bridge With Current Stabilizationmentioning

confidence: 99%

“…Almost every device used in domestic, industrial, or laboratory environments, ranging from computers, cars, power trains, air conditioners, measuring devices, or thermostats, uses temperature sensors. The most common types of temperature sensors include thermistors, thermocouples, resistance temperature detectors (RTDs), digital thermometer integrated circuits, and analog thermometer integrated circuits [1][2][3][4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…An important problem that occurs during temperature measurement using a resistive temperature sensor is the need to limit the influence of the resistance of the wires, by which such a sensor is connected to the measuring system, and which is the cause of erroneous temperature determination by such a sensor. Basically, three approaches are considered [8], i.e., using two wires [9,10], three wires [11], and the third approach, using four wires [13]. It should be mentioned that the described measurement system uses the compensation of the resistance of the lead wires by the three-wire method [16], which was improved and adapted to the system described below in this paper.…”

Section: Introductionmentioning

confidence: 99%

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The Precise Temperature Measurement System with Compensation of Measuring Cable Influence

2021

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The article presents an active bridge system that enables the solution of a significant problem consisting in ensuring correct indications of temperature values in a wide measuring range for a Pt100 temperature sensor with properties defined by the standard (EN-60751 + A2). The presented active bridge system combines the properties of the measuring amplifier with the stabilization of the current value in the branch in which the Pt100 sensor was placed. The article focuses on the comparison of the temperature measurement in a typical resistance bridge and the measurement made in the developed active bridge, which has also become the subject of a patent. For the performed tests, in which the correctness of the temperature measurement system operation was verified, and on the basis of the obtained results, the quality of temperature measurements was compared in a wide range of changes.

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Section: Active Measuring Bridge With Current Stabilizationmentioning

confidence: 99%

Section: Active Measuring Bridge With Current Stabilizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Precise Temperature Measurement System with Compensation of Measuring Cable Influence

2021

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“…Currently, the aforementioned problem is addressed by adding lead wires. For example, in Reference [3,4] three-wire and four-wire techniques were used separately. However, the cost of one additional lead wire in a three-wire RTD and of two additional lead wires in a four-wire RTD will be extremely high and with extra difficulty of wiring, especially in industries where a large number of process points are to be monitored from a control room located at a remote place [5], such as chemical, thermal power, electric plant and other industries.…”

Section: Introductionmentioning

confidence: 99%

Lead-Wire-Resistance Compensation Technique Using a Single Zener Diode for Two-Wire Resistance Temperature Detectors (RTDs)

Xiong

Zhou

2020

Sensors

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In remote measurement systems, the lead wire resistance of the resistance sensor will produce a large measurement error. In order to ensure the accuracy of remote measurement, a novel lead-wire-resistance compensation technique is proposed, which is suitable for a two-wire resistance temperature detector. By connecting a zener diode in parallel with the resistance temperature detector (RTD) and an interface circuit specially designed for it, the lead-wire-resistance value can be accurately measured by virtue of the constant voltage characteristic of the zener diode when reverse breakdown occurs, and compensation can thereby be made when calculating the resistance of RTD. Through simulation verification and practical circuit testing, when the sensor resistance is in 848–2120 Ω scope and the lead wire resistance is less than 50 Ω, the proposed technology can ensure the measuring error of the sensor resistance within ±1 Ω and the temperature measurement error within ±0.3 °C for RTDs performing 1000 Ω at 0 °C. Therefore, this method is able to accurately compensate the measurement error caused by the lead wire resistance in two-wire RTDsand is suitable for most applications.

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Recent Climate Change in Western Black Sea Region of Turkey by Paleoclimatic Reconstruction of Borehole Temperatures

Çelik,

Erkan,

Tayanç

et al. 2023

Pure Appl. Geophys.

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The impact of recent climate change varies around the world and understanding the regional variations is important for making accurate deductions and generating future climate predictions and mitigation plans. Borehole temperature reconstruction is one of the common methods to determine the ground surface temperature (GST) history of a region. In this study, high-precision (<0.01 K) borehole temperature-depth data from ve different locations in Western Black Sea Region of Turkey were used for reconstruction of the ground surface temperature changes for the last century. Measurement sites are located in rural areas so the results are free from the urban heat island interference. The reconstructions reveal that ground surface temperatures have risen by an average of 0.91 °C in the study area during the last century. Results from inland sites show cooling of 0.24°C until 1975 and 0.99°C warming since then. The results in the coastal area show no such cooling period. The rapid warming trend in the last three decades revealed by GST reconstructions indicates high sensitivity of the region to present-day global warming.

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A portable borehole temperature logging system using the four-wire resistance method

Cited by 8 publications

References 7 publications

The Precise Temperature Measurement System with Compensation of Measuring Cable Influence

The Precise Temperature Measurement System with Compensation of Measuring Cable Influence

Lead-Wire-Resistance Compensation Technique Using a Single Zener Diode for Two-Wire Resistance Temperature Detectors (RTDs)

Recent Climate Change in Western Black Sea Region of Turkey by Paleoclimatic Reconstruction of Borehole Temperatures

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