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Temperature Calculators

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Visit other Fluke companies for calibration equipment and services in electrical, power, pressure, flow, RF, and more.

Link to Fluke Calibration for electrical and power calibration

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5616 Secondary Reference PRT

Temperature calibration and measurement reference platinum resistance thermometers.

Features

  • Temperature range: –200 °C to 420 °C
  • Excellent stability: ± 10 mK
  • Calibrated accuracy ± 0.011 °C at 0 °C
  • Reference-grade platinum sensing element
  • NIST-traceable calibration included

Specifications 

Parameter  Value 
Temperature range  –200 °C to 420 °C 
Nominal resistance at 0.01 °C  100 W ±  0.5 W 
Temperature coefficient  0.003925 W/W/°C nominal 
Calibrated Accuracy[1] (k=2)  ± 0.012 °C at –200 °C
± 0.011 °C at 0 °C
± 0.028 °C at 420 °C 
Short-term repeatability[2]  ±  0.007 °C at 0.010 °C 
Drift[3]  ±  0.007 °C at 0.010 °C 
Hysteresis  ±  0.010 °C maximum 
Sensor length  50.8 mm (2.0 in) 
Sensor location  9.5 mm ±  3.2 mm from tip (0.375 in ±  0.125 in) 
Sheath diameter tolerance  ±  0.08 mm (±  0.003 in) 
Sheath material  INCONEL® 600 
Minimum insulation resistance  500 MW at 23 °C 
Transition junction temperature range[4]  –50 °C to 150 °C (see footnote) 
Transition junction dimensions  76.2 mm x 9.5 mm (3.00 in x 0.375 in) 
Minimum immersion length[5]
(< 5 mK error)  		102 mm (4.0 in) 
Maximum immersion length  254 mm (10 in) 
Response time[5]  8 seconds typical 
Self heating (in 0 °C bath)  60 mW/°C 
Lead-wire cable type  Teflon®-jacketed cable, Teflon® insulated conductors, 24 AWG stranded, silver plated copper 
Lead-wire length  182.9 cm ±  2.5 cm (72.0 in ±  1.0 in) 
Lead-wire temperature range  –50 °C to 150 °C 
Calibration  NIST-traceable calibration 
[1]Includes calibration uncertainty and 100 hr drift.  [2]Three thermal cycles from min to max temp, includes hysteresis, 95 % confidence (k=2)  [3]After 100 hrs at max temp, 95 % confidence (k=2)  [4]Temperatures outside this range will cause irreparable damage. For best performance, transition junction should not be too hot to touch.  [5]Per ASTM E 644 
Calibration Uncertainty 

Temperature 
Expanded Uncertainty (k=2) 
–197 °C 
0.012 °C 
–80 °C 
0.012 °C 
–38 °C 
0.011 °C 
0 °C 
0.009 °C 
156 °C 
0.011 °C 
230 °C 
0.013 °C 
420 °C 
0.021 °C 
Note: Laboratories may periodically reevaluate their uncertainties. Calibration uncertainties depend on the calibration process, the standards used, and the instrument performance. 

You won’t find another NIST-traceable reference temperature sensor that matches the accuracy and temperature range of the 5616 for the same price.

The 5616-12 is a 100-ohm platinum resistance thermometer (PRT) with excellent short-term repeatability and comes with an unaccredited NIST-traceable calibration. 

The temperature range of the 5616 covers –200 °C to 420 °C, and its high-purity platinum element and durability make it great for calibrating in the lab or in the field. When choosing a reference with a platinum element, there are two things you want to look at carefully: the short-term repeatability and the long-term drift. When PRTs are thermally cycled over their temperature range as they would be during a calibration, their resistance at the triple point of water can move up and down within an expected range. Hart Scientific defines this range (called “short-term repeatability”) as the repeatability at the triple point of water during three thermal cycles.  5616s are among the best performing in their class with short-term repeatability better than ±  0.010 °C (±  0.004 °C is typical). In addition, the 5616’s drift is ± 0.007 °C at the triple point of water when exposed up to its maximum temperature (420 °C) for 100 hours. These specifications are given at k=2 and therefore include a 95 % confidence level. 

The 5616’s sealed ­INCONEL® 600 sheath is 298 mm (11.75 in) long and 6.35 mm (0.250 in) in diameter. The probe’s Teflon®-jacketed cable is made of silver plated copper that ends with four-wire leads, which eliminate the effects of lead-wire resistance on measurements. 

Use the 5616 with Hart’s 1560 Black Stack, 1529 Chub-E4, or 1502A Tweener thermometer readouts. 

Each sensor comes with a manufacturer’s report of calibration. The report includes the expanded uncertainty (k=2) at seven calibration temperature points, ITS-90 calibration coefficients, and a temperature vs. resistance table presented in 1 °C increments. 

Compare the 5616 to other Secondary Reference PRTs. You’ll like its price, but you’ll love its performance. 

Ordering Information
5616-12-X  Secondary Reference PRT, 6.35 mm x 298 mm
(0.250 x 11.75 in),
–200 to 420 °C 
2601 Probe Carrying Case 

X = termination. Specify “A” (INFO-CON for 914X), “B” (bare wire), “D” (5-pin DIN for Tweener Thermometers), “G” (gold pins), “I” (INFO-CON for 1521 or 1522), “J” (banana plugs), “L” (mini spade lugs), “M” (mini banana plugs),  “P” (INFO-CON for 1523 or 1524), or “S” (spade lugs). 

Downloads

Right click the appropriate link below and “Save Target As ...” to download this data sheet or User's Guide in Acrobat (.pdf)  format.

5616 Data Sheet
5616 User's Guide

 

 

 

  
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