Kaye LTR -90 - Chapter 2. Specifications; 2.1 Introduction

Kaye LTR -90 Operating Manual 5
Chapter 2. Specifications
Chapter 2. Specifications
2.1 Introduction
The Ultra Cool Dry Calibrator (LTR-90) provides a stable, portable temperature reference for performing
thermocouple calibration. The LTR-90 operates over the range of -95°C to 140°C.
The LTR-90 is most commonly used with Kaye's Intelligent RTD (IRTD) probe and Kaye Validator to make up a
complete validation system. The LTR-90 has the ability to rapidly heat and cool, making it an ideal instrument for
performing multiple-point calibrations for a variety of processes, such as freeze dryer, cold rooms, incubators and
steam sterilizers.
The LTR-90 has 4 wells for sensors and two wells for IRTD probes. For calibrating thermocouples, there are inserts
that go into each well to reduce stem conduction errors, thereby providing maximum accuracy and stability. With
inserts installed, each of the 4 sensor wells can hold three 22 gauge PTFE thermocouples, for a total of 12
thermocouples. Utilizing smaller gauge thermocouples can expand calibration capacity.
The Kaye Validator automatically performs the sensor calibration, including programming the set-point temperatures at
the LTR-90. If you are using the LTR-90 as a standalone instrument, the temperatures can be manually set to any
temperature within the specified range by using the control buttons located on the front panel.
These dry-well calibrators are designed for portability, moderate cost, and ease of operation. With proper use they
should provide continued accurate calibration of temperature sensors and devices. The user should be familiar with the
safety guidelines and operating procedures of the calibrator as described in this Operator's Manual.