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Precision Thermometers

F250 Precision Thermometer

Features   Accuracy: ±0.01°C; up to ±0.02°C with probe   4 wire AC bridge for stability without recalibrating   Selectable resolution of 0.001°C or 0.01°C over full range   Range: -200°C to +962°C depending on probe   Switchboxes for up to 32 direct or 16 differential channels       Typical Applications   Site Standard   Environmental Chambers   Research   Viscometry   Multi-channel logging   F250 Brochure (PDF, approx 210KB)   For more information about this product contact ASL

ASL's F250 provides high accuracy, dual channel temperature measurement with Platinum Resistance Thermometers - PRTs - and uses AC bridge technology as developed by ASL for Standards Laboratories throughout the world. Model F250 requires no regular recalibration, the AC circuit techniques eliminating thermal EMFs and drift, while providing excellent long term stability. Front panel data entry allows you to enter probe calibration data into the F250's memory, so that thermometer resistance can be accurately converted to temperature in °C, °F or K. A security key prohibits unauthorised or accidental data entry. The combination of proven technology and sophisticated microprocessor control gives you a reliable, easy to use precision instrument.

Using F250 with SB250 Switchbox

The 8 or 16 channel SB250 switchbox complements the F250 in appearance and performance. Adding no extra system errors you can use one or two switchboxes, one each on inputs A & B, with either manual switching from the keypad or under interface control. Configuration examples are; a single switchbox 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 switchboxes, one each on inputs A & B, you can read up to 32 probes directly, or 16 differential pairs. SB250 switchboxes turn the F250 into a powerful logging system when used with ASL's U-LOG data logging software.

F250 Precision Thermometer Features

See the table below for a run-down of this product's features and capabilities.

For more information about this product contact ASL