The PLTC-782 & PHTC-783 portable dry well temperature calibrators are intended to provide an adjustable isothermal environment for calibration of a variety of temperature sensors and safety switches

They have been designed under contract for the US Navy. You can view our commercially available selection of dry blocks here

The isothermal enclosure consists of a fixed thermoelectric or heater block into which removable inserts can be placed. Temperature sensors requiring calibration are placed in suitably drilled holes in the inserts. A full selection of inserts to accommodate a variety of sensor diameters is supplied with each portable dry-well temperature calibrator.

The main display keeps the operator informed of all pertinent information during the calibration process including; control setpoint, well temperature, heating, cooling, or stable condition, thermal switch status, and important user safety warnings, such as "well touch-safe" or "insert too hot to remove".

A modern interface with a unique digital control knob, on-screen alphanumeric keyboard, and traditional membrane keypad provide new ways to simplify and speed complex operations or data entry.

The dry block provides users the ability to create, edit, and run, calibration routines to automatically progress through frequent calibrations of temperature switches or probes. Stored calibration data from the unit under test (UUT) can be reviewed on the main display or printed directly to a PCL-compatible printer via the dedicated USB printer port.

The dry block has two modes of operation; [Long Stem] which is used for most traditional calibration where the sensor under test can fit to or near the bottom of the well, and [Short Stem] which changes the calibrator control point to the midsection of the insert to allow better calibration of short sensors; typically 4" or less.

A unique self-calibration feature allows users to connect an 8.5-digit DMM, such as an Agilent/HP 3458A or Transmille 8104, via the IEEE interface and with an SPRT connected to the DMM the dry well can run through a 5-point auto Cal/Adjust process. Traditional manual calibration techniques are included as well.

These Temperature Calibrators are available in two models:

PLTC-782: Portable Low-Temperature Calibrator covering -40 to 140°C
PHTC-783: Portable High-Temperature Calibrator covering 50 to 650°C

Read more about the dry blocks here