9210 Mini Triple-Point of Water Maintenance Apparatus - Features and Benefits

If the reason you don’t use fixed-point cells is because they’re too expensive or too difficult to use, you haven’t heard of Hart’s mini fixed-point apparatus. 

Because ITS-90 calibrations require frequent measurements at the triple point of water, and because the triple point of water is often used as a statistical check against the drift of a temperature standard, it is important to be able to realize and maintain well-constructed triple point of water cells easily.  

Hart’s 9210 TPW Maintenance Apparatus provides built-in programming for the simple supercool-and-shake realization and maintenance of our 5901B Mini TPW Cell. Simply insert the cell, enter the “freeze” mode through the front-panel buttons, have your morning cup of coffee, and when the 9210 audibly alerts you, remove the Mini TPW Cell and give it a shake to initiate freezing a portion of the water.        Re-insert the cell, change the program mode to “maintain,” and you’ve got 0.01°C for the rest of the day with uncertainty of only ±0.0005°C. 

Precision-machined thermal blocks can also be used to take advantage of the excellent stability and uniformity of the 9210 for performing comparison calibrations. Multi-hole and custom blocks are available with 178 mm  depths. 

Features

• Easy preprogrammed realization.
• Inexpensive Fixed-Point solution.
• Training takes a few hours.

Specifications

Range

-10°C to 125°C

Ambient Operating Range

5°C to 45°C  

Stability

±0.02°C

Vertical Gradient

±0.05°C over 100mm at 0°C

Plateau Duration

6 to 10 hours typical

Resolution

0.01°C

Set Point Resolution

±0.002°C; 0.00003°C in high-resolution mode

Display Resolution

±0.01° (0.001° in program mode)

Display Scale

°C or °F, switchable

Immersion Depth

171mm in optional comparison block

Stabilization Time

15 minutes nominal

Preheat Wells

3 wells (for 3.18mm, 6.35mm, or 7.01mm probes

Fault Protection
 

Adjustable software cutout using control probe; separate circuit thermocouple cutout for maximum instrument temperature.

Display Accuracy

±0.25°C

Comparison Block

Three multi-hole blocks, blanks, and custom blocks available.

Well-to-well Gradient
(in comparison block)

±0.02°C

Heating Time

Ambient to 100°C: 45 minutes

Cooling Time

Ambient to -5°C: 25 minutes

Communication Port

RS-232 included

Power Requirements

115Vac (±10%), 60Hz, 1.5A; or, 230Vac (±10%) 50Hz, 0.75A, 170W

Exterior Dimensions

489mm (H) x 222mm (W) x 260mm (D)

Weight

7kg

Ordering Information

Hart 9210

Mini Triple Point of Water Maintenance Apparatus

Hart 5901B

Mini TPW Cell

Accessories

Hart 1904-TPW

Accredited Cell Intercomparison

Hart 3110-1

Comparison Insert, Block

Hart 3110-2

Comparison Insert 'A', holes at 1.6mm, 3.2mm, 4.76mm, 6.35mm, 9.5mm, and 12.7mm

Hart 3110-3

Comparison Insert 'B', 2 holes at 4.76mm, 2 holes at 6.35mm, and 2 holes at 9.5mm

Hart 3110-4

Comparison Insert 'C', 6 holes at 6.35mm