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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. |
