Ametek ATC-125, ATC-140, ATC-156, ATC-157, ATC-250 Data sheet
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t e m p e r a t u r e
Accessory Sheet
AS-CP-2205-US
Insertion tubes
for JOFRA temperature
dry-blocks
Inserts for JOFRA dry-blocks:
ATC-125 -90 to 125°C / -130°F to 257°F
ATC-140 -20 to 140°C / -4 to 284°F
ATC-156 -24 to 155°C / -11 to 311°F
ATC-157 -45 to 155°C / -49 to 311°F
ATC-250 28 to 250°C / 82 to 482°F
ATC-320 33 to 320°C / 91 to 608°F
ATC-650 33 to 650°C / 91 to 1202°F
ITC-155 -23 to 155°C / -9 to 311°F
ITC-320 33 to 320°C / 91 to 608°F
ITC-650 33 to 650°C / 91 to 1202°F
CTC-140 -17 to 140°C / -1 to 284°F
CTC-320 33 to 320°C / 91 to 608°F
CTC-650 33 to 650°C / 91 to 1202°F
CTC-1200 300 to 1205°C / 572 to 2200°F
MTC-140 -17 to 140°C / -1 to 284°F
MTC-320 33 to 320°C / 91 to 608°F
MTC-650 33 to 650°C / 91 to 1202°F
Page 1:
Does and don’ts in the use of inserts
Page 2:
Using inserts
Page 3:
Inserts for CTC and MTC series
Page 4-5:
Predrilled inserts for ATC and ITC series
Page 5:
Undrilled inserts for ATC and ITC series
Page 6-7:
Multi-hole inserts for ATC and ITC series
Page 8:
Application kit for calibration of sanitary
sensors
PRODUCT DESCRIPTION
From time to time we get information from end-users of JOFRA dryblock 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
Sensor-under-test
Calibrator
Insertion tube
Well
Sensor-under-test
Calibrator
Insertion tube
Well
Sensor-under-test
Calibrator
Insertion tube
Well
Sensor-under-test
Calibrator
Insertion tube
Well
Sensor-under-test
Insulation plug
Calibrator
Insertion tube
Well
Sensor-under-test
Calibrator
Insertion tube
Well
USING INSERTS
Insertion tubes
for temperature dry-blocks
Using inserts from other JOFRA calibrators
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
Using insertion tubes with diameters that are too small creates another problem. The
heat transfer between the well and the insertion tube is insufficient, as the air around
the tube has an insulating effect. This will make the temperature very unstable and
unable to reach the set value.
This problem also applies to the use of 6 mm and 1/4 in (6.35 mm) sensor holes. Even
though this combination may seem to match it gives a very poor heat transfer as the
sensors do not have an even contact with the insertion tube.
Accessory Sheet
AS-CP-2205-US
Using inserts made of the “wrong” material
Home-made inserts can be made in a very professional way with the correct lenght
and size, but the material used for the inserts might cause problems and wrong
results. If the specifications e.g. apply to a brass insert, it is not a good idea to use
inserts made of aluminum or other materials due to the difference in conductivity.
To get the right result and to make the calibrator measure correctly, it is therefore
extremely important to use the right material for the inserts.
Using inserts with too short sensor holes
When drilling your own inserts it is a common mistake to make the sensor holes too
short. Using this kind of insert may influence the temperature gradient, as the calibrator was originally calibrated at the bottom of the well.
Using inserts without using an insulation plug
All JOFRA cooling temperature calibrators are delivered with an insulation plug, to be
placed on top of the well. The design of this type of calibrators require such a device,
and the calibrators have also been calibrated with the insulation plug.
There is a large heat flow out of the well, and if the plug is not used during calibration,
it will cause problems reaching the set temperature of the calibrator.
2 www.jofra.com
Using inserts with the correct size, holes and material
To avoid problems, waste of time and to get the optimum use of your calibrator we
recommend that you use inserts from AMETEK Calibration Instruments as they follow
our specifications.
Insertion tubes
for temperature dry-blocks
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
Instruments
Inserts CTC/MTC-140 A 2CTC/MTC-320 A CTC/MTC-650 A CTC-320 B CTC-650 B CTC-1200 A
5-pack, undrilled
inserts
Undrilled
insulation plug
Spare part no. for predrilled inserts - metric (mm)
Probe diameter
3 mm 003
4 mm 004
5 mm 005
6 mm 006
7 mm 007
8 mm 008
9 mm 009
10 mm 010
11 mm 011
12 mm 012
13 mm 013
14 mm 014
15 mm 015
16 mm 016
18 mm 018
20 mm 020
Package of the above inserts
Multi-hole type 1 M01
Spare part no. for predrilled inserts - imperial (inch)
Probe diameter
1/8 in 125
3/16 in 187
1/4 in 250
5/16 in 312
3/8 in 375
7/16 in 437
1/2 in 500
9/16 in 562
5/8 in 625
11/16 in 688
3/4 in 750
13/16 in 813
7/8 in 875
Package of the above inserts
Multi-hole type 2 M02
Note 1: Use the insert code, when ordered as the standard insert together with a new calibrator.
Note 2: CTC-140 A only: Remember to use matching insulation plugs.
Note 3: CTC-140 A only: All multi-hole inserts are delivered with a matching insulation plug.
Note 4: CTC-1200 A only: Remember to order matching insulation plugs.
60F448 100175 100194 60F356 60F420 124403
123937 N/A N/A N/A N/A see below
Instruments
Insert
code
Insert
code
CTC/MTC-
1
140 A
123428 123436 123444 N/A N/A 124503
60F451 100177 100196 60F359 60F423 124406
123429 123437 123445 123452 123460 124504
60F453 100179 100198 60F361 60F425 124407
123430 123438 122516 123453 123461 124505
105185 100182 100201 105190 105195 124506
105186 100183 100202 105191 105196 124507
105187 100185 105188 105192 105197 124508
123431 100188 100204 105193 105198 124509
123432 100186 100206 105194 105199 124510 124414
123433 60F339 105189 123454 123462 N/A
N/A 100190 100208 123455 123463 N/A
N/A 100191 100209 123456 123464 N/A
N/A 123439 123446 123457 123465 N/A
N/A 123440 122517 123458 123466 N/A
N/A 123441 122518 123459 123467 N/A
124679 124681 124685 124683 124687 124689
123479
CTC/MTC-
1
140 A
60F450 100176 100195 60F358 60F422 124511 124415
60F452 100178 100197 60F360 60F424 124512
60F454 100180 100199 60F362 60F426 124404
60F456 100181 100200 60F364 60F428 124513 124518
60F458 100184 100203 60F366 60F430 124514
60F460 100187 100205 60F368 60F432 124515
60F462 100189 100207 60F370 60F434 124405 124414
60F464 60F344 60F408 60F372 60F436 N/A
60F466 100192 100210 60F374 60F438 N/A
N/A 60F348 60F412 60F376 60F440 N/A
N/A 100193 100211 60F378 60F442 N/A
N/A 60F352 60F416 105184 60F444 N/A
N/A 60F354 60F418 60F377 60F446 N/A
124680 124682 124686 124684 124688 124690
123480
CTC/MTC-
2
320 A
3
123475 123476 N/A N/A N/A
CTC/MTC-
2
320 A
3
123477 123478 N/A N/A N/A
CTC/MTC-
650 A
CTC/MTC-
650 A
CTC-320 B CTC-650 B
Instruments
CTC-320 B CTC-650 B
CTC-1200 A
Inserts
CTC-1200 A
Inserts
4
Insulation
plugs
124415
124416
124518
124519
N/A
4
Insulation
plugs
124416
124519
N/A
Accessory Sheet
AS-CP-2205-US
Undrilled inserts
(CTC/MTC-140 A)
4
4
Undrilled inserts
(CTC/MTC-320 / 650 A/B)
Undrilled inserts
(CTC-1200 A)
3
4
5
Multi-hole type 1
(CTC/MTC-140 A)
9
3
6
Multi-hole type 1
(CTC/MTC-320 A / 650 A)
3/16
1/8
Multi-hole type 2
(CTC/MTC-140 A)
3/8
1/8
1/4
Multi-hole type 2
(CTC/MTC-320 A / 650 A)
www.jofra.com 3
4,5
6
4
5
1/4
3/16
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