What are the temperature specification limits for an Alliance CH and CHC? - WKB299961

ENVIRONMENT

• Alliance Column Heater (SMH) and Column Heater/Cooler (SMC)
• Operators Guide 715003794 Rev. C, Page 33

ANSWER

According to the operators guide 715003794 Rev. C, page 33: "The column heater maintains the column at temperatures from 5 °C above ambient (minimum of 20 °C) to 60 °C." This means that the column heater is designed to keep the column’s temperature within a specific range. Here’s a breakdown:

• 5 °C above ambient: The heater will maintain the column’s temperature at least 5 °C higher than the surrounding room temperature. For example, if the room temperature is 15 °C, the column heater will keep the column at a minimum of 20 °C.
• Minimum of 20 °C: Regardless of the room temperature, the column heater will not let the column’s temperature drop below 20 °C.
• Up to 60 °C: The maximum temperature the column heater can maintain is 60 °C.

Therefore, the heater ensures that the column stays within the range of 20 °C to 60 °C, depending on the ambient temperature.

From the CHC section of the guide: "The column heater/cooler maintains the column at temperatures from 4 °C to 65 °C, with a set-point temperature range that is ambient minus 15 °C or 4 °C (whichever is greater) to 65 °C".

This means that the column heater/cooler can maintain the temperature of the column within a range of 4 °C to 65 °C. The set-point temperature, which is the temperature you can set for the column, depends on the ambient (surrounding) temperature. Specifically:

• The minimum set-point temperature is either 4 °C or 15 °C below the ambient temperature, whichever is higher.
• The maximum set-point temperature is 65 °C.

For example, if the ambient temperature is 20°C, the minimum set-point temperature would be 5 °C (20 °C - 15 °C). However, if the ambient temperature is 10 °C, the minimum set-point temperature would be 4 °C, because 4 °C is higher than -5 °C (10 °C - 15 °C).

ADDITIONAL INFORMATION