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ratiometer
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ratiometer
ratiometer (reɪʃɪˈɒmɪtə(r)) [f. ratio + -meter.] A device for measuring the ratio of two electrical quantities.1925 R. O. Kapp G. Kapp's Transformers (ed. 3) ix. 220 The ratio of a transformer is tested by an apparatus known as a ratiometer. This is really an autotransformer of which the windings ar...
Oxford English Dictionary
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Ratio meter systems
A Ratiometer type temperature indicating system consists of a sensing element and a moving-coil indicator, which unlike the conventional type has two coils The main application behind in this ratiometer system is to find the unknown resistance, namely Rx.
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ratio
▪ I. ratio, n. (ˈreɪʃ(ɪ)əʊ) [L., f. rat-, ppl. stem of rērī to think: see also ration, reason.] 1. a. Reason, rationale. spec. in Law, reason or rationale upon which a juridical decision is based; = ratio decidendi (see sense 1 b).1636 Mede Reverence God's House ii. Wks. (1672) 343 The true Ratio..o...
Oxford English Dictionary
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Total air temperature
recovery factor (less than 1) may be introduced to compensate:
where e is the recovery factor (also noted Ct)
Typical recovery factors
Platinum wire ratiometer thermometer ("flush bulb type"): e ≈ 0.75 − 0.9
Double platinum tube ratiometer thermometer ("TAT probe"): e ≈ 1
Other notations
Total air temperature
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