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PRT HIGH ACCURACY DIGITAL THERMOMETER
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F250 PRT Bench Precision
High Accuracy Thermometer.
F250 Bench Thermometer provides high accuracy,
dual channel temperature measurement with Platinum Resistance
Thermometers - PRT's - and uses AC bridge technology as developed by ASL
for Standards Laboratories throughout the world.
Model F250 Digital Bench Thermometer requires no regular recalibration, the AC circuit techniques
eliminating thermal emf's and drift, while providing excellent long term
stability.
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Digital Bench Thermometer |
| Our
Price: |
Contact us for
pricing |
| Phone:
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253-927-6186
866-318-6186 |
| Fax:
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253-927-6189 |
| email:
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sales@hotektech.com |
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The 8 or 16 channel SB250
switchbox, or scanner, complements the F250 Thermometer in appearance and
performance.
Adding no extra system errors you can use one or two scanners, one each
on Inputs A and B, with manual switching from the keypad or under
interface control.
You can choose to connect your probes to front or back panels on both
F250 and the scanners.
Configuration examples are; A single scanner attached to Input A, lets
you read up to 8 or 16 thermometers directly, or measure them
differentially to a probe on Input B.
Similarly with two scanners, you
can read up to 32 probes directly, or 16 differential pairs.
SB250
scanners turn the F250 into a powerful logging system, particularly when
used with ASL's
LabWindows software
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F250 PRT Bench Precision High Accuracy
Thermometer
Specification
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| Range |
-200°C to
+962°C, depending on PRT used. |
| Accuracy |
F250 only: ±0.005°C
(±5mK) at 0°C, otherwise <±0.01°C (±10mK)
F250 + T100-250: ±.25mK (-50°C to +250°C)
F250 + T100-450: -70°C (±45mK), -40°C to
+250°C (±25mK),+250°C to +450°C (±100mK)
F250 + T100-650: -189°C to 420°C (±20mK),
+420°C to +550°C (±35mK) |
| Resolution |
Low resolution: 0.01°C ,
0.01°F, 0.01K, 0.01ohms (display) or 0.001ohms (via interface).
High resolution: 0.001°C, 0.001°F, 0.001K,
0.001ohms (display) or 0.0001ohms (via interface).
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| Repeatability |
±2 least
significant digits (±0.002°C), included in accuracy |
| Stability |
Long term:
typically <0.002ohms per year (<0.005°C for Pt100). |
| Temperature
co-efficient |
<±0.0005°C/°C ambient change. Operating ambient: 15°C to 25°C for
best accuracy. 0°C to 50°C maximum, non-condensing. |
| Data entry
format |
ITS90
coefficients, Calendar van Dusan coefficients, Calendar van Dusan
data pairs or EN60751 for un-calibrated probes. |
| Probe Current |
1 mA
constant current source. |
| Probe Types |
Pt100 to
EN60751 with nominal R0=100 and "Alpha"=0.00385, plus10 and 25ohm
high alpha probes up to 0.00392. |
| Thermometer
input connectors |
Front panel:5 pin
industrial DIN socket
Rear panel:5 pin screw terminal plug. |
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Communications |
RS232C: Baud rates 4800,
9600 and 19200. Parity, data and stop bits user selectable.
IEEE-488: Address selectable from 1 to 7.
Analogue output: ±10V DC full scale
output, resolution 1mK or 10mK depending on front panel resolution
setting. Linearity ±0.05% full scale. |
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