Copyright 2013 Baker Hughes Company.
10 | Dry
TC / Liquid
TC Temperature Calibrators–English
4.3.3 Infrared Insert
The infrared insert is used for contact-less measurement infrared thermometers. The infrared
insert has a specially designed surface and surface coating on the inside. As a result, an
emissivity of 0.9994 (black body) is achieved.
Figure
5: Infrared Insert
The additional holes in the border, see Figure
5 item
2, are for external reference sensors. This
allows the exact temperature of the inside face of the infrared insert to be determined.
4.3.3.1 Installation
1. The infrared insert is inserted into the dry block using the insert exchange tool, see Figure
item
3.
2. Centre the infrared insert so that there is an even air gap between the infrared insert and the
dry block.
4.3.3.2 Removal and Cleaning
1. Allow the calibrator cool before the infrared insert is removed.
2. Pull the infrared insert out of the dry block with the help of the insert exchange tool, see
5 item
3.
3. Clean the infrared insert and the dry block to prevent inserts from getting stuck in the dry
block.
4.3.3.3 Application Tips
1. The measuring spot of the infrared thermometer must project itself onto the floor of the
infrared insert during the calibration. The measuring spot must be smaller than the inner
diameter and must not touch the wall of the infrared insert.
2. Ice or condensation can form in the infrared insert at temperatures of less than 0
°C (32
°F)
in high humidity levels. This can affect the emissivity of the infrared insert and degrade the
calibration accuracy. Ice or condensation formation can be reduced by:
a. Covering the measuring opening of the infrared insert.
b. Keeping the measuring opening closed for as long as possible.
c.
Only opening the measuring opening briefly for the calibration.
Note:
Ice or condensation can be removed by gently heating the infrared insert.
1 Infrared insert.
2 External sensor bore holes:
2 × 3.5
mm (0.138″)
1 × 4.5
mm (0.177″)
3 Insert exchange tool.
3
1
2
