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← Back to knowledge hubResistance temperature detectors: 50 selection, application and maintenance questions
50 shared questions for Resistance temperature detectors, covering selection, delivery, maintenance, common questions and evidence-based brand comparisons, with verification actions, limits and sources.
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Shared guidance for this product family. Confirm the complete model and application; family-level guidance is not evidence of a particular product specification or approval.
通用原理不能代替具体型号的技术确认；产品性能、认证和替代关系以完整订货号及实际工况为准。
1What does the Resistance temperature detectors principle establish, and what does it not establish?
An RTD uses a resistance-temperature relationship; curve, wiring compensation and thermal installation determine the result. The principle explains signal generation; it does not establish the range, accuracy, materials or approvals of every model. Review the physical principle and the application limits separately.
Verification: Confirm "Resistance type and temperature curve" and assess "Three-wire compensation relies on matched leads" against the actual application. Record the complete model and document revision used.
适用边界：Three-wire compensation relies on matched leads
2Is the required result measured directly or calculated from other inputs?
Define the quantity to be accepted before selecting a display unit. An RTD uses a resistance-temperature relationship; curve, wiring compensation and thermal installation determine the result. For "Resistance type and temperature curve", document output definitions and conversion or compensation conditions; displaying a value does not make it a direct measurement under all conditions.
Verification: Document the process objective, units and reference conditions. Check "Three-wire compensation relies on matched leads" and list separate inputs and acceptance methods for calculated results.
适用边界：Three-wire compensation relies on matched leads
3Which application information is needed before requesting a quotation?
Prepare at least these five input groups: Resistance type and temperature curve; Two/three/four-wire arrangement and length; Insertion, thermowell and velocity; Required uncertainty and response; Vibration and insulation. Mark unknown items for confirmation instead of substituting a normal point or an assumed default for all conditions.
Verification: Have process, instrumentation and purchasing roles agree the inputs, particularly "Two/three/four-wire arrangement and length". Resolve missing evidence before requesting application confirmation.
适用边界：Three-wire compensation relies on matched leads
4How should the range be chosen rather than copied from a nominal equipment rating?
Select the range from actual operating conditions and permissible error, then check extremes and installation constraints. For this family: Three-wire compensation relies on matched leads Nominal size or maximum equipment rating need not equal the useful measuring interval.
Verification: List minimum, normal, maximum and abnormal conditions. Check "Insertion, thermowell and velocity" against the documented performance envelope.
适用边界：Three-wire compensation relies on matched leads
5Can a larger turndown claim or display rescaling fix poor low-end performance?
No. Low-end usability depends on the principle, available signal and error mechanisms. Element tolerance is not whole-chain uncertainty More display digits, software scaling or a stated turndown cannot remove the original noise or installation error.
Verification: Obtain error definitions and limits at the actual low operating point. Use "Can displayed temperature identify open and short circuits alone → No. Configured fault handling can replace the raw input with a limit or alarm. → Verify curve, wiring and terminal diagram and record Required uncertainty and response" to investigate bias instead of comparing only percent-of-full-scale values.
适用边界：Element tolerance is not whole-chain uncertainty
6How should compatibility with the measured object and materials be established?
Use the complete measured object and actual exposure, rather than a material name alone. Required uncertainty and response Avoid this family-specific misuse: Element tolerance is not whole-chain uncertainty For non-wetted equipment, assess loads, target materials, signals and environmental compatibility instead.
Verification: List the actual contact or loading parts, seals, insulation and cleaning conditions. Have the responsible parties assess "Self-heating changes the sensing temperature".
适用边界：Self-heating changes the sensing temperature
7Why must abnormal and environmental conditions be listed separately from normal operation?
Normal measurement, temporary excursions and survival limits are different requirements. Self-heating changes the sensing temperature Start-up, cleaning, impacts, power interruption or abnormal environments can determine the necessary construction and protection.
Verification: Complete the worst-case conditions using "Vibration and insulation" and check "Software cannot recreate lost independent sense leads". Separate continuous operating limits from temporary limits in the specification.
适用边界：Software cannot recreate lost independent sense leads
8Can the published instrument accuracy be used as the installed system accuracy?
Not without assessment. Use a traceable reference appropriate to the principle, compare several application points and record conditions before and after adjustment. The installed system also includes object, mounting, signal conversion, environmental and reference effects. Derived results additionally depend on the relevant input uncertainties.
Verification: Agree actual test points, installation conditions and the acceptance reference. Check "Verify curve, wiring and terminal diagram" and document the system error or uncertainty basis.
适用边界：Element tolerance is not whole-chain uncertainty
9How should response time, filtering and a stable display be balanced?
A stable indication and fast change detection involve a trade-off; filtering cannot repair incorrect installation or real process variation. Does slow upward drift always mean element aging → No. Lead resistance, contacts, insulation and process changes can contribute. → Test sensor, transmitter and receiver separately and record Insertion, thermowell and velocity Review the complete chain when fast response matters, not merely the display refresh rate.
Verification: Define the shortest relevant event and acceptable delay. Check "Investigate moisture and wiring for low insulation" and verify local output, display and receiving-system response using a controlled change.
适用边界：Self-heating changes the sensing temperature
10Which typical applications fit, and which require a specific engineering review?
Typical contexts include: Process-pipe temperature; Bearing temperature; Temperature-control reference. Similar application labels do not establish equivalent conditions. In particular, assess "Software cannot recreate lost independent sense leads" before relying on another installation as proof.
Verification: Select the nearest application and compare "Resistance type and temperature curve" and "Vibration and insulation". Obtain written confirmation where published application limits are exceeded.
适用边界：Software cannot recreate lost independent sense leads
11How should a complete order code be defined without unspecified standard options?
Translate required functions, performance and physical interfaces into verifiable options. Resistance type and temperature curve; Two/three/four-wire arrangement and length. Options affecting suitability or supply scope should be explicit; terms such as standard or same as existing are insufficient.
Verification: Check the complete order code and selection sheet, especially "Insertion, thermowell and velocity". List accessories, documents, calibration and delivery boundaries separately.
适用边界：Three-wire compensation relies on matched leads
12Which mounting and mechanical layout checks belong before ordering?
Verify curve, wiring and terminal diagram The installation drawing must match the available space and process or mechanical structure. Access for fitting and servicing should be established before delivery.
Verification: Review a dimensioned, oriented site drawing. Use "Required uncertainty and response" and "Self-heating changes the sensing temperature" to confirm connections, support, removal access and safe isolation.
适用边界：Self-heating changes the sensing temperature
13How can supporting infrastructure prevent an instrument that fits but cannot be used?
Check immersion and thermowell fit Supporting conditions are part of the measurement system. Matching mechanical connections or signal names alone do not establish power, I/O, grounding or configuration compatibility.
Verification: Confirm "Verify curve, wiring and terminal diagram" and "Verify output, failure state and receiving-system compatibility" against actual terminals, loops and receiving-system settings.
适用边界：Element tolerance is not whole-chain uncertainty
14What is a sensible commissioning sequence before changing correction factors?
Check identity, installation and basic conditions first, then status, output and process response. Investigate moisture and wiring for low insulation Preserve original evidence for unexplained anomalies instead of concealing them with zero or factor adjustments.
Verification: Record factory settings and initial status. Investigate "Can an RTD pass at room temperature yet fail when hot → Yes. Insulation, intermittent wiring and curve errors may emerge only at operating temperature. → Investigate moisture and wiring for low insulation and record Two/three/four-wire arrangement and length" step by step and change parameters only after identifying the cause and using an authorised procedure.
适用边界：Self-heating changes the sensing temperature
15Do identical output units or interface names establish connection compatibility?
No. Establish the represented object and reference conditions: Resistance type and temperature curve. Electrical equipment also needs loop type, scaling, failure behaviour and protocol details checked. Mechanical indicators require clear boundaries between indication and remote-transmission accessories.
Verification: Check the receiving-system variable against "Resistance type and temperature curve" and verify limits, units and abnormal states with the actual equipment. Record wiring, configuration and end-to-end checks against "Check immersion and thermowell fit".
适用边界：Element tolerance is not whole-chain uncertainty
16What should a calibration report contain to be relevant to the application?
Use a traceable reference appropriate to the principle, compare several application points and record conditions before and after adjustment. The report should identify the delivered instrument, measured quantity, conditions, method and results. A general conformity certificate does not establish performance for every option or operating condition.
Verification: Check serial number, points, units, reference equipment and traceability. Compare "Two/three/four-wire arrangement and length" with the calibrated conditions and agree separate acceptance where they differ.
适用边界：Element tolerance is not whole-chain uncertainty
17How can delivery and site acceptance use reproducible pass criteria?
Test sensor, transmitter and receiver separately Agree criteria before testing, including range, conditions, error definition and treatment of anomalies. Similar-looking readings or an unsuitable portable reference are not sufficient acceptance evidence.
Verification: Choose an appropriate reference using "Use a traceable reference appropriate to the principle, compare several application points and record conditions before and after adjustment.". Record "Resistance type and temperature curve" and test conditions; investigate "Can displayed temperature identify open and short circuits alone → No. Configured fault handling can replace the raw input with a limit or alarm. → Verify curve, wiring and terminal diagram and record Required uncertainty and response" before deciding on rework or recalibration.
适用边界：Element tolerance is not whole-chain uncertainty
18What belongs in the quotation and agreement for a non-standard application?
Define why the standard supply is insufficient, the required verification and the responsible parties. Software cannot recreate lost independent sense leads; Software cannot recreate lost independent sense leads. Additional materials, construction, documents or tests depend on actual requirements.
Verification: Attach "Vibration and insulation" and the deviations. Obtain technical confirmation, additional charges, delivery conditions and acceptance methods; unknown requirements must not be assumed satisfied.
适用边界：Software cannot recreate lost independent sense leads
19Where should investigation start when there is no valid reading or output?
Can an RTD pass at room temperature yet fail when hot → Yes. Insulation, intermittent wiring and curve errors may emerge only at operating temperature. → Investigate moisture and wiring for low insulation and record Two/three/four-wire arrangement and length Distinguish the actual measured condition from device-state and readout or transmission faults. Do not immediately interpret missing data as sensor failure or a zero process value.
Verification: Under appropriate safe isolation, check "Check immersion and thermowell fit". Compare local and receiving-end status and record when the fault appeared.
适用边界：Three-wire compensation relies on matched leads
20How can unstable readings be separated from genuine process variation?
Does slow upward drift always mean element aging → No. Lead resistance, contacts, insulation and process changes can contribute. → Test sensor, transmitter and receiver separately and record Insertion, thermowell and velocity Compare independent process evidence and raw signals before deciding whether installation, interference or equipment is responsible. More filtering can hide a real abnormal event.
Verification: Keep conditions comparable and record correlation with process or equipment events. Check "Verify curve, wiring and terminal diagram" and change one factor at a time.
适用边界：Self-heating changes the sensing temperature
21How should a persistent high or low bias be investigated before changing factors?
Can displayed temperature identify open and short circuits alone → No. Configured fault handling can replace the raw input with a limit or alarm. → Verify curve, wiring and terminal diagram and record Required uncertainty and response Systematic bias can arise from units, reference conditions, configuration, installation or the reference method. An unexplained correction can move one operating-point error to other conditions.
Verification: Align quantities, time bases and units first. Review the reference using "Use a traceable reference appropriate to the principle, compare several application points and record conditions before and after adjustment." and confirm that "Two/three/four-wire arrangement and length" matches the configuration.
适用边界：Element tolerance is not whole-chain uncertainty
22When is it appropriate to adjust a drifting zero or reference position?
Does a correct ice point prove the whole range → No. Span, nonlinearity and high-temperature behavior require additional points. → Check immersion and thermowell fit and record Vibration and insulation Establish a genuine, stable reference condition that meets the method requirements before considering adjustment. Some instruments have no freely adjustable site zero.
Verification: Check "Investigate moisture and wiring for low insulation" and "Use a traceable reference appropriate to the principle, compare several application points and record conditions before and after adjustment." and retain before-and-after results. If the conditions cannot be established, remove external effects or use a qualified service.
适用边界：Self-heating changes the sensing temperature
23Which evidence helps diagnose intermittent alarms or failures?
Can a resistance simulator validate the complete assembly → It checks electronics, not immersion, heat transfer or the sensing element's thermal behavior. → Investigate moisture and wiring for low insulation and record Resistance type and temperature curve Intermittent faults need correlated event records, not just a normal display after recovery. Review alarm settings, communication status and actual process abnormalities separately.
Verification: Retain time, status codes, raw trends and the contemporaneous "Vibration and insulation". Compare "Check immersion and thermowell fit" and "Investigate moisture and wiring for low insulation" to locate the failing link.
适用边界：Software cannot recreate lost independent sense leads
24Why should repeated failures trigger a cause review instead of another identical replacement?
Repeated failures warrant a common-cause assessment. Software cannot recreate lost independent sense leads If the external conditions remain unchanged, an identical construction or installation can experience the same failure again.
Verification: Summarise failed parts, service time and "Vibration and insulation". Check "Verify curve, wiring and terminal diagram" and "Self-heating changes the sensing temperature" and establish corrective action before selecting repair or redesign.
适用边界：Self-heating changes the sensing temperature
25What distinguishes a site comparison, an adjustment and a calibration?
Use a traceable reference appropriate to the principle, compare several application points and record conditions before and after adjustment. A comparison identifies differences; adjustment changes indication or parameters; calibration establishes a reference relationship under stated conditions. They are not interchangeable claims.
Verification: Define what performance and evidence must be established, using conditions relevant to "Two/three/four-wire arrangement and length". Retain original and adjusted results, references and responsibility records.
适用边界：Element tolerance is not whole-chain uncertainty
26What must be checked again after replacing an instrument with the same basic model?
The same basic model does not establish identical options, software, calibration or accessories. Verify output, failure state and receiving-system compatibility; Confirm certificates, calibration and site change approval in writing. Previous system operation does not remove the need to verify a replacement.
Verification: Compare full order codes and revisions. Recheck critical points, failure states and interfaces using "Test sensor, transmitter and receiver separately" before handover.
适用边界：Software cannot recreate lost independent sense leads
27Can every published maximum rating be achieved simultaneously?
No. Three-wire compensation relies on matched leads Maximum values usually relate to particular options and conditions. Temperature, load, pressure, materials, speed or signal conditions may constrain one another.
Verification: Review "Insertion, thermowell and velocity" and "Vibration and insulation" together. Obtain confirmation for the combined conditions instead of assembling unrelated maxima from separate pages.
适用边界：Three-wire compensation relies on matched leads
28Does a missing signal or zero indication establish that the process value is zero?
No. Can an RTD pass at room temperature yet fail when hot → Yes. Insulation, intermittent wiring and curve errors may emerge only at operating temperature. → Investigate moisture and wiring for low insulation and record Two/three/four-wire arrangement and length Indication, measurement and transmission have distinct possible failure modes. Also consider "Three-wire compensation relies on matched leads"; establish the actual process condition independently.
Verification: Check available status or failure indications and "Verify curve, wiring and terminal diagram". For interlocks, follow the complete safety design rather than substituting a zero value for diagnosis.
适用边界：Three-wire compensation relies on matched leads
29Does one acceptable test point establish compliance across the working range?
No. Use a traceable reference appropriate to the principle, compare several application points and record conditions before and after adjustment. Test points and directions must reflect the working interval, relevant error mechanisms and acceptance purpose. Multiple points, reversal or load tests depend on the method.
Verification: Define acceptance coverage against "Two/three/four-wire arrangement and length" and include critical operating points. Mark conditions outside the tests as unverified.
适用边界：Element tolerance is not whole-chain uncertainty
30Are the largest range, highest accuracy class and most options always preferable?
Not necessarily. Options should serve the required objective; excess configuration can add cost, complexity or incompatibility. Element tolerance is not whole-chain uncertainty; Element tolerance is not whole-chain uncertainty. Establish essential requirements before comparing optional benefits.
Verification: Document the objective in "Resistance type and temperature curve" and why "Resistance type and temperature curve" is needed. Compare performance at actual working points rather than one headline metric.
适用边界：Element tolerance is not whole-chain uncertainty
31Can every maintenance or recalibration interval simply be fixed at one year?
Not independently of risk and history. Use a traceable reference appropriate to the principle, compare several application points and record conditions before and after adjustment. Intervals depend on applicable law or contract, conditions, drift, maintenance and failure evidence. Generic advice cannot replace mandatory requirements.
Verification: Use "Does a correct ice point prove the whole range → No. Span, nonlinearity and high-temperature behavior require additional points. → Check immersion and thermowell fit and record Vibration and insulation" and "Software cannot recreate lost independent sense leads" to establish and review an initial plan. Retain the justification and approval for interval changes.
适用边界：Software cannot recreate lost independent sense leads
32Can parts from different brands be mixed if their physical interfaces fit?
Physical fit is insufficient. Two/three/four-wire arrangement and length; Verify curve, wiring and terminal diagram. Matching, materials, signals, calibration and approval boundaries can change with the combination.
Verification: Check the complete combination against "Check immersion and thermowell fit" and obtain compatibility and acceptance evidence. An unconfirmed assembly must not be described as an approved system.
适用边界：Element tolerance is not whole-chain uncertainty
33Does a hazardous-area, hygienic or safety label establish suitability for that duty?
Check the exact order configuration and valid documents rather than a series name. Confirm certificates, calibration and site change approval in writing "Software cannot recreate lost independent sense leads" also matters; certificates, installation conditions and restrictions together define suitability.
Verification: Obtain certificate identifiers, covered models and special conditions and match them to the site. Similar names do not grant functional-safety or legal-metrology approval.
适用边界：Software cannot recreate lost independent sense leads
34What evidence makes the final result acceptable, reproducible and sustainable?
Establish the chain from quantity definition and application limits through configuration, mounting, reference and operating status. Test sensor, transmitter and receiver separately A normal indication or brochure alone cannot demonstrate continuing system reliability.
Verification: Put "Resistance type and temperature curve", "Use a traceable reference appropriate to the principle, compare several application points and record conditions before and after adjustment." and "Can a resistance simulator validate the complete assembly → It checks electronics, not immersion, heat transfer or the sensing element's thermal behavior. → Investigate moisture and wiring for low insulation and record Resistance type and temperature curve" into the technical, acceptance and maintenance records, with responsibility for reviewing excursions.
适用边界：Software cannot recreate lost independent sense leads
35Can a DOWESTON model replace an installed instrument from another brand?
Possibly, after a full configuration and application comparison. A basic model name or matching output is not proof of equivalent replacement. Resistance type and temperature curve; Two/three/four-wire arrangement and length; Verify curve, wiring and terminal diagram. Record conclusions on material differences.
Verification: Provide the original full order code, data sheet and site conditions. Check "Verify output, failure state and receiving-system compatibility" and "Confirm certificates, calibration and site change approval in writing" and obtain the necessary test and approval evidence before replacement.
适用边界：Software cannot recreate lost independent sense leads
36Why choose DOWESTON, and what would make that reasoning evidence-based?
Base the decision on project compliance and documented delivery or service, rather than a slogan. "Resistance type and temperature curve" and "Three-wire compensation relies on matched leads" are important family-specific checks. Claim only benefits supported by the offered product documents and written commitments.
Verification: Request the proposed configuration matching "Resistance type and temperature curve", test evidence and delivery/service terms. Do not infer unverified performance, approvals, origin or service life.
适用边界：Three-wire compensation relies on matched leads
37How can competing brands be compared beyond a single accuracy or price figure?
Use identical conditions and supply boundaries. Resistance type and temperature curve; Verify curve, wiring and terminal diagram; Confirm certificates, calibration and site change approval in writing. Quotes with different ranges, compensation, accessories or calibration scope can conceal material differences.
Verification: Compare "Two/three/four-wire arrangement and length", "Element tolerance is not whole-chain uncertainty" and mounting/acceptance conditions. Separate demonstrated, unverified and inapplicable items; do not claim unproven overall superiority.
适用边界：Element tolerance is not whole-chain uncertainty
38How should purchasing compare cost without overlooking additions or rework?
Compare complete supply and use-cycle costs, not only the main instrument price. Verify curve, wiring and terminal diagram; Use a traceable reference appropriate to the principle, compare several application points and record conditions before and after adjustment. List the actual installation, supporting equipment, calibration, consumables, downtime and service requirements without assuming any brand is always cheaper.
Verification: Use the same "Resistance type and temperature curve" configuration and "Vibration and insulation" boundary. Separate equipment, accessories, commissioning and maintenance responsibilities and retain a traceable comparison.
适用边界：Software cannot recreate lost independent sense leads
39Are Pt100 and Pt1000 interchangeable?
No. The nominal resistance and input curve must match. Verify Verify curve, wiring and terminal diagram and record Resistance type and temperature curve. Three-wire compensation relies on matched leads. Confirm the exact model and record the result before changing settings.
Verification: Verify curve, wiring and terminal diagram and record Resistance type and temperature curve
适用边界：Three-wire compensation relies on matched leads
40Why must three-wire leads be matched?
Compensation assumes matching lead resistance; mismatched wires or contacts leave residual error. Verify Check immersion and thermowell fit and record Two/three/four-wire arrangement and length. Element tolerance is not whole-chain uncertainty. Confirm the exact model and record the result before changing settings.
Verification: Check immersion and thermowell fit and record Two/three/four-wire arrangement and length
适用边界：Element tolerance is not whole-chain uncertainty
41Is a four-wire system always more accurate overall?
It reduces lead effects, but element, input, installation and calibration still matter. Verify Investigate moisture and wiring for low insulation and record Insertion, thermowell and velocity. Self-heating changes the sensing temperature. Confirm the exact model and record the result before changing settings.
Verification: Investigate moisture and wiring for low insulation and record Insertion, thermowell and velocity
适用边界：Self-heating changes the sensing temperature
42Can splitting a merged two-wire section restore three-wire compensation?
No. The merged section no longer has independent lead sensing. Verify Test sensor, transmitter and receiver separately and record Required uncertainty and response. Software cannot recreate lost independent sense leads. Confirm the exact model and record the result before changing settings.
Verification: Test sensor, transmitter and receiver separately and record Required uncertainty and response
适用边界：Software cannot recreate lost independent sense leads
43Should excitation current always be increased?
Higher excitation also raises self-heating, which depends on heat transfer. Verify Verify curve, wiring and terminal diagram and record Vibration and insulation. Three-wire compensation relies on matched leads. Confirm the exact model and record the result before changing settings.
Verification: Verify curve, wiring and terminal diagram and record Vibration and insulation
适用边界：Three-wire compensation relies on matched leads
44Does a short insert only slow response?
Poor tip contact or immersion can also create steady conduction errors. Verify Check immersion and thermowell fit and record Resistance type and temperature curve. Element tolerance is not whole-chain uncertainty. Confirm the exact model and record the result before changing settings.
Verification: Check immersion and thermowell fit and record Resistance type and temperature curve
适用边界：Element tolerance is not whole-chain uncertainty
45Can an RTD pass at room temperature yet fail when hot?
Yes. Insulation, intermittent wiring and curve errors may emerge only at operating temperature. Verify Investigate moisture and wiring for low insulation and record Two/three/four-wire arrangement and length. Self-heating changes the sensing temperature. Confirm the exact model and record the result before changing settings.
Verification: Investigate moisture and wiring for low insulation and record Two/three/four-wire arrangement and length
适用边界：Self-heating changes the sensing temperature
46Does slow upward drift always mean element aging?
No. Lead resistance, contacts, insulation and process changes can contribute. Verify Test sensor, transmitter and receiver separately and record Insertion, thermowell and velocity. Software cannot recreate lost independent sense leads. Confirm the exact model and record the result before changing settings.
Verification: Test sensor, transmitter and receiver separately and record Insertion, thermowell and velocity
适用边界：Software cannot recreate lost independent sense leads
47Can displayed temperature identify open and short circuits alone?
No. Configured fault handling can replace the raw input with a limit or alarm. Verify Verify curve, wiring and terminal diagram and record Required uncertainty and response. Three-wire compensation relies on matched leads. Confirm the exact model and record the result before changing settings.
Verification: Verify curve, wiring and terminal diagram and record Required uncertainty and response
适用边界：Three-wire compensation relies on matched leads
48Does a correct ice point prove the whole range?
No. Span, nonlinearity and high-temperature behavior require additional points. Verify Check immersion and thermowell fit and record Vibration and insulation. Element tolerance is not whole-chain uncertainty. Confirm the exact model and record the result before changing settings.
Verification: Check immersion and thermowell fit and record Vibration and insulation
适用边界：Element tolerance is not whole-chain uncertainty
49Can a resistance simulator validate the complete assembly?
It checks electronics, not immersion, heat transfer or the sensing element's thermal behavior. Verify Investigate moisture and wiring for low insulation and record Resistance type and temperature curve. Self-heating changes the sensing temperature. Confirm the exact model and record the result before changing settings.
Verification: Investigate moisture and wiring for low insulation and record Resistance type and temperature curve
适用边界：Self-heating changes the sensing temperature
50What is often missed in RTD replacement?
Curve coefficient, wiring, thermowell mechanics and sensing length must be compared. Verify Test sensor, transmitter and receiver separately and record Two/three/four-wire arrangement and length. Software cannot recreate lost independent sense leads. Confirm the exact model and record the result before changing settings.
Verification: Test sensor, transmitter and receiver separately and record Two/three/four-wire arrangement and length
适用边界：Software cannot recreate lost independent sense leads
