5626, 5628 Secondary SPRT, PRT, Temperature Sensors

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Description

5626, 5628 Secondary SPRT, PRT, Temperature Sensors

If you’re using block calibrators, furnaces, or temperature points above normal PRT (platinum resistance thermometer) temperatures (420 °C), then these two PRTs are for you. The Fluke 5626 is nominally 100 Ω and the 5628 (formerly Hart Scientific) is nominally 25.5 Ω. Both instruments have a temperature range of –200 °C to 661 °C. They make great working or check standards for calibration work up to the aluminum point.

Using a regular PRT at temperatures above 500 °C exposes the platinum to contamination. If the PRT is used as a reference or calibration standard, contamination is a major problem. SPRTs (standard platinum resistance thermometers), which are more expensive and delicate, can handle the higher temperatures, but with greater risk to the instrument due to shock, contamination, or mishandling. The 5626 and 5628 are designed to reduce the contamination risk through the use of internal protection while not impairing performance.

In addition to the right measurement performance and durability, a PRT for secondary applications should be priced affordably. Fluke Calibration’s new PRTs are inexpensive and come with an accredited calibration. The calibration comes complete with ITS-90 constants and a resistance-versus-temperature table.

Check the temperature range, check the stability, check the price! Who else gives you this much quality, performance, and value for your money? No one!

Highlights

High-temperature secondary standards

  • Range to 661°C
  • Meets all ITS-90 requirements for resistance ratios
  • Rtp drift < 20 mK after 500 hours at 661°C
  • Calibrated accuracy of ± 0.006 °C at 0 °C

Fluke Calibration’s high-temp secondary standards fill the gap between affordable, but temperature-limited secondary PRTs (platinum resistance thermometers) and more expensive, highly accurate SPRTs (standard platinum resistance thermometers).

Specifications

Specifications

Temperature Range  –200 °C to 661 °C 
Handle Temp.  0 °C to 80 °C 
RTPW  5626  : 100 Ω (± 1 Ω)
5628  : 25.5 Ω (± 0.5 Ω) 
Resistance Ratio W(Ga) W(302.9146K) ≥ 1.11807
α ≥ 0.003925
Calibrated Accuracy(k=2)  ± 0.006 °C at –200 °C
± 0.006 °C at 0 °C
± 0.015 °C at 420 °C
± 0.022 °C at 661 °C 
Stability  5626  : ± 0.003 °C
5628  : ± 0.002 °C 
Long-Term Drift (k=2)  5626  :  < 0.006 °C/100 hours at 661 °C
5628  : < 0.004 °C/100 hours at 661 °C 
Immersion  At least 12.7 cm (5 in) recommended 
Sheath  Inconel™ 600 
Lead Wires  4-wire Super-Flex PVC, 22 AGW 
Termination  Gold-plated spade lugs, or specify 
Size  6.35 mm dia. x 305 mm,  381 mm,  or 508 mm (0.25 x 12, 15, or 20 in) standard, custom lengths available 
Calibration  Accredited calibrations from Fluke Calibration
Includes calibration and 100 hr drift

Models and Accessories

Model Name Description
5626-12-X Secondary Standard PRT (0.25 in dia x 12 in), 100 Ω, –200 °C to 661 °C

(17025 accredited calibration included. Traceable to NIST standards.)

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).X = termination.

5626-15-X Secondary Standard PRT (0.25 in dia x 15 in), 100 Ω, –200 °C to 661 °C
(17025 accredited calibration included. Traceable to NIST standards.)
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).X = termination.
5626-20-X High-temp PRT, 100 Ω, 508 mm (20 in) Includes case
(17025 accredited calibration included. Traceable to NIST standards.)
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)
5628-12-X Secondary Standard PRT (0.25 in dia x 12 in), 25 Ω, –200 °C to 661 °C

(17025 accredited calibration included. Traceable to NIST standards.)

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).

5628-15-X Secondary Standard PRT (0.25 in dia x 15 in), 25 Ω, –200 °C to 661 °C
(17025 accredited calibration included. Traceable to NIST standards.)
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).
5628-20-X High-temp PRT, 25.5 Ω, 508 mm (20 in) Includes case
(17025 accredited calibration included. Traceable to NIST standards.)
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)

Accessories common to all models  :

Accessory Description
2609 Probe Carrying Case, Plastic (for probes 635 mm [25 in] in length)

Knowledge and Information

Product Manuals
application/pdf icon 5626/5628 Platinum Resistance Thermometer User’s Guide (438.46 KB)
Application Notes
application/pdf icon Calculating Calibration Uncertainties in an Automated Temperature Calibration System (426.88 KB)
application/pdf icon Establishment of a Secondary Temperature Calibration Laboratory (3.09 MB)
application/pdf icon How to Calibrate an RTD or Platinum Resistance Thermometer (PRT) (652.16 KB)
application/pdf icon Industrial temperature readout and probe selection guide (2.33 MB)
application/pdf icon Temperature Calibration Equipment: A Technician’s Guide (1.62 MB)
application/pdf icon Temperature measurement and calibration: What every instrument technician should know (1.65 MB)
application/pdf icon Thermocouple App Notes Series, 1 of 4 – Thermocouple Fundamentals (2.5 MB)
application/pdf icon Thermocouple App Notes Series, 2 of 4 – How to Select Thermocouple Calibration Equipment (2.51 MB)
application/pdf icon Why Use a Triple Point of Water? (1.19 MB)
application/pdf icon Does Immersion Depth Really Matter? (745.44 KB)
Papers / Articles
application/pdf icon A High-Quality Platinum Resistance Thermometer to 661°C (85.57 KB)
application/pdf icon An Investigation of Long-Term Stability of a Precision Platinum Resistance Thermometer up to 660°C (164.52 KB)
application/pdf icon Fixed Points for Secondary Level and Industrial Calibration (496.68 KB)
application/pdf icon Fixed Points for Secondary Level Calibrations (560.12 KB)
I Just Got My Probe Recalibrated, Now What?
application/pdf icon Improving the Stability of Standard Platinum Resistance Thermometers (207.37 KB)
application/pdf icon Methods for Evaluating the Condition of Platinum Resistance Thermometers (130.23 KB)
Platinum Resistance Thermometers (PRT)
application/pdf icon Proper Platinum Resistance Thermometer Calibration Uncertainty Analysis (351.32 KB)
application/pdf icon Using a Mini Triple Point of Water System to Improve Reliability in a Temperature Calibration Laboratory (177.86 KB)
Why did my temperature sensor fail calibration?
On-Demand Webinars
Overcoming Drift: Tips to Maintaining Your PRTs