Jofra Insertion Tubes for Dry-Block Calibration
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for temperature dry-blocks Insertion TubesInserts for JOFRA dry-blocks ITC-155 -23 to 155°C / -9 to 311°F From time to time we get information from end-users of JOFRA dry-block calibrators that something is wrong with the calibrator, as it is not able to meet the temperature specifications. This is often due to the fact that the customer is using a wrong insertion tube, although he is in good faith. Therefore, you can save a lot of time and irritations by using the right insertion tube. Does and dont's in the use of inserts Important things to REMEMBER when using inserts: • Remove inserts from the well with the insert removal tool. • Remove the inserts after calibration, as it might cause problems to remove them later on if they stay in the well for longer periods. • Take care when removing very hot or cold inserts and use adequate protective equipment if necessary. • Make certain that the sensors and inserts are free from any particles of dirt before inserting them into the well. Inserts are designed to fit perfectly into the well thus maximizing the thermal conductivity. If not the insert may be jammed. • Remove regularly build-up of dirt and dust from inserts and wells with a cloth or detergent. Important things to AVOID when using inserts: • Do not force inserts or sensors into the well. • Do not drop any foreign materials into the well. • Do not use oil or other liquids to optimise the thermal conductivity due to risk of leakage, which will destroy the other components. • Do not use inserts of metals dissimilar to that of the block, unless specified by the manufacturer as this may cause a different degree of expansion and contraction. ISO 9001 Manufacturer Specification Sheet AS-Insertion Tubes AMETEK TEST & CALIBRATION

USING INSERTS Using inserts from other JOFRA calibrators Insertion tube Well Calibrator Often customers believe that they can use inserts from other models of JOFRA temperature calibrators. Consequently, we get complaints about errrors in the temperature specifications. Even if the diameter is right, the length might not be. In this case the insertion tube is too tall. This gives a heat flow out of the top of the well and the temperature uniformity will change dramatically. Using inserts that are too small Insertion tube Well Calibrator Using insertion tubes with diameters that are too...

PREDRILLED INSERTS FOR CTC AND MTC SERIES Inserts for CTC-140 A and CTC-320 A/B are made of aluminum. Inserts for CTC-650 A/B are made of brass. Inserts for CTC-1200 A are made of high-temperature steel alloy. All specifications on hole sizes are referring to the outer diameter (OD) of the sensor-under-test. The correct clearance size is applied in all predrilled inserts. Inserts, undrilled Spare part no. for predrilled inserts - metric (mm) Spare part no. for predrilled inserts - imperial (inch) Note 1: Use the insert code, when ordered as the standard insert together with a new...

JOFRAAI# calibration #1\ PREDRILLED INSERTS FOR ATC AND ITC SERIES - 4 MM REFERENCE HOLE JOFRA dry-block insert compatibility and materials: ATC-320 = ATC-650 = ITC-320 = ITC-650 (made of brass) ATC-125 = ATC-155 = ATC-156 (made of aluminum) ATC-157 = ITC-155 (made of aluminum) All specifications on hole sizes are referring to the outer diameter (OD) of the sensor-under-test. The correct clearance size is applied in all predrilled inserts. (ATC-157 A/B and ITC-155 A) Spare part no. for predrilled inserts with 4 mm reference hole Note: All inserts (metric and inches) are supplied with a hole...

Spare part no. for predrilled inserts with 1/4 in (6.35 mm) reference hole Note: All inserts (metric and inches) are supplied with a hole for the 4 mm OD reference sensor. Note 1: Use the insert code, when ordered as the standard insert together with a new calibrator. Note 2: ATC-157 / ITC-155: 12 mm, 13 mm, 7/16 in and 1/2 in inserts are delivered without the 4 mm reference hole, but supplied with a matching insulation plug. Insertion Tubes

Spare part no. for multi-hole inserts - metric (mm) Note: All multi-hole inserts (metric and inches) for ATC-125/140/156/157 and ITC-155 are supplied with a matching insulation plug. Note: Remember to use matching insulation plugs. Note 1: Use the insert code, when ordered as the standard insert together with a new calibrator. Insertion Tubes

Multi-hole M05 (ATC-125 A/B) Multi-hole M06 (ATC-125 A/B) Multi-hole M02 (ATC-140/250 A/B) Multi-hole M04 (ATC-157 A/B / ITC-155 A) Multi-hole M09 (ATC-157 A/B / ITC-155 A) Spare part no. for multi-hole inserts - imperial (inch) Note: All multi-hole inserts (metric and inches) for ATC-125/140/156/157 and ITC-155 are supplied with a matching insulation plug. Note: Remember to use matching insulation plugs. Note 1: Use the insert code, when ordered as the standard insert together with a new calibrator. Insertion Tubes

ORDERING CUSTOM-MADE SPECIAL INSERTS Custom-made special inserts are made on request. When ordering custom made special inserts a few details have to be noticed: • Specify the instrument for which the inserts are ordered • Specify the sensor size for each hole Please contct us for custom-made inserts. APPLICATION KIT FOR CALIBRATION OF SANITARY SENSORS At picture 1 you see a custom made insert and our STS-102 A cable reference sensor placed in a JOFRA ATC-156 B dry-block calibrator. At picture 2, the sanitary sensor has been fitted into the insert and is ready for calibration. Note that the...