Ametek RTC-158 A, RTC-156 B, RTC-157 C, RTC-158B, RTC-157 B Reference Manual

Reference Manual

Reference Temperature Calibrator

JOFRA RTC-156/157/158/159/250/700 A/B/C

Reference Manual

Reference Temperature Calibrator

JOFRA RTC-156/157/158/159/250/700 A/B/C

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About this manual….

 The structure of the manual

This manual is divided into 10 chapters. These describe how to set up, operate, service and maintain the calibrator. The technical specifications are described and accessories may be ordered from the list of accessories.

Along with the calibrator, you should have received a multilingual user manual, which sets out the operating instructions for the instrument. It is designed to provide a quick reference guide for use in the field.

 Safety symbols

This manual contains a number of safety symbols designed to draw your attention to instructions that must be followed when using the instrument, as well as any risks involved.

Warning

Conditions and actions that may compromise the safe use of the instrument and result in considerable personal injury or material damage.

Caution…

Conditions and actions that may compromise the safe use of the instrument and result in slight personal or material damage.

Note…

Special situations, which demand the user’s attention.

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List of contents

1.0 Introduction .............................................................................. 6

1.1 Warranty ....................................................................................... 8

2.0 Safety instructions ................................................................... 9

3.0 Setting up the calibrator ........................................................ 16

3.1 Receipt of the calibrator .......................................................... 16

3.2 Preparing the dry-block calibrator ............................................... 19

3.2.1 When setting up the dry-block calibrator, you must… ... 21

3.2.2 Choice of insertion tube ................................................. 23

3.2.3 Inserting the sensors ...................................................... 24

3.3 Preparing the liquid bath calibrator (RTC-158/250 A/B/C only) . 26

3.3.1 When setting up the liquid bath calibrator, you must… . 28

3.3.2 Selection of fluids ........................................................... 33

3.3.3 Handling of lids .............................................................. 34

3.3.4 Inserting the sensors ...................................................... 35

3.4 Programming intelligent sensors ................................................ 36

4.0 Operating the Calibrator ........................................................ 37

4.1 Standard connections ................................................................. 37

4.2 Input modules (B and C versions only) ....................................... 39

4.3 Keyboard and main screen display overview ............................. 41

4.3.1 Main screen display information .................................... 44

4.3.2 Main screen temperature values ................................... 46

4.3.3 Stability of temperature values ...................................... 46

4.4 Operating principle ...................................................................... 47

4.4.1 Horizontal Menu ............................................................. 47

4.4.2 Vertical Menu ................................................................. 48

4.4.3 Parameter Fields ............................................................ 49

4.4.4 Working with lists ........................................................... 51

4.5 Starting the calibrator .................................................................. 54

4.6 Setting the temperature .............................................................. 55

4.7 Calibration ................................................................................... 55

4.7.1 Running a calibration ..................................................... 57

4.7.2 Viewing calibration results ............................................. 61

4.7.3 Displaying calibration information .................................. 62

4.7.4 Deleting workorders ....................................................... 64

4.8 Switch test menu ........................................................................ 65

4.8.1 Running a switch test ..................................................... 66

4.8.2 Showing switch test results ............................................ 68

4.9 Auto step menu ........................................................................... 72

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4.9.1 Running an Auto step calibration ................................... 72

4.9.2 Auto Step test results ..................................................... 75

4.10Sensor Setup menu .................................................................... 77

4.10.1 Setting the additional stability time (A version) .............. 77

4.10.2 Setting the parameters for TRUE – reference sensor (B

and C versions only) ...................................................... 78

4.10.3 Setting the parameters for DLC– dynamic load

compensation (B and C versions only) .......................... 80

4.10.4 Setting the parameters for SUT– Sensor under test (B

versions only) ................................................................. 80

4.10.5 Viewing the Reference and DLC data (B and C versions

only) ............................................................................... 83

4.11Calibrator Setup menu ................................................................ 85

4.11.1 Setting the temperature parameters .............................. 85

4.11.2 Setting the temperature resolution ................................. 87

4.11.3 Setting the sound, volume and operating mode ............ 88

4.11.4 Setting calibration interval .............................................. 89

4.11.5 Changing the date and time ........................................... 89

4.11.6 Saving a setup ............................................................... 90

4.11.7 Loading a setup ............................................................. 91

4.11.8 Resetting the instrument setup to factory defaults ........ 92

4.11.9 Network Configuration (for service use only) ................. 92

4.12Selecting the stirrer speed (RTC-158/250 A/B/C only) ............... 93

4.13Information Screen ..................................................................... 94

4.14About the calibrator ..................................................................... 95

4.15Simulation or training .................................................................. 95

5.0 After use .................................................................................. 97

5.1 Storing and transporting the calibrator ....................................... 97

5.1.1 Transporting the dry-block calibrator ............................. 99

5.1.2 Transporting the liquid bath calibrator ......................... 100

5.2 Emptying the well (liquid baths only) ........................................ 100

6.0 Replacing the main fuses .................................................... 102

6.1 Error messages ........................................................................ 103

6.2 Returning the calibrator for service ........................................... 105

7.0 Maintenance .......................................................................... 108

7.1 Cleaning .................................................................................... 108

7.2 Adjusting and calibrating the instrument ................................... 110

7.3 Maintenance of STS-reference sensor ..................................... 111

7.4 Maintenance of DLC-sensor ..................................................... 113

8.0 Technical specifications ...................................................... 114

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9.0 List of accessories ............................................................... 166

10.0 Standard insertion tubes ..................................................... 169

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1.0 Introduction

Congratulations on your new AMETEK JOFRA RTC Calibrator!

With this AMETEK JOFRA calibrator, you have chosen an extremely effective instrument, which we hope will live up to all your expectations. Over the past many years, we have acquired extensive knowledge of industrial temperature calibration. This expertise is reflected in our products, which are all designed for daily use in an industrial environment. Please note that we are very interested in hearing from you, if you have any ideas or suggestions for changes to our products.

This reference manual applies to the following instruments:

 JOFRA RTC-156 A - Temperature calibrator  JOFRA RTC-156 B - Temperature calibrator with sensor and

reference inputs

 JOFRA RTC-156 C - Temperature calibrator with reference input  JOFRA RTC-157 A – Temperature calibrator  JOFRA RTC-157 B – Temperature calibrator with sensor and

reference inputs

 JOFRA RTC-157 C - Temperature calibrator with reference input  JOFRA RTC-158 A – Temperature calibrator  JOFRA RTC-158 B – Temperature calibrator with sensor and

reference inputs

 JOFRA RTC-158 C - Temperature calibrator with reference input  JOFRA RTC-159 A – Temperature calibrator  JOFRA RTC-159 B – Temperature calibrator with sensor and

reference inputs

 JOFRA RTC-159 C - Temperature calibrator with reference input  JOFRA RTC-250 A – Temperature calibrator  JOFRA RTC-250 B – Temperature calibrator with sensor and

reference inputs

 JOFRA RTC-250 C - Temperature calibrator with reference input  JOFRA RTC-700 A - Temperature calibrator  JOFRA RTC-700 B - Temperature calibrator with sensor and

reference inputs

 JOFRA RTC-700 C - Temperature calibrator with reference input

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Model

A

Model B

LC

Model C

LC

ISO-9001 certified

AMETEK Denmark A/S was ISO-9001 certified in September 1994 by Bureau Veritas Certification Denmark.

CE-label

Your new calibrator bears the CE label and conforms to the EMC Directive and the Low-voltage Directive.

Technical assistance

Please contact the dealer from whom you acquired the instrument if

you require technical assistance.

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1.1 Warranty

This instrument is warranted against defects in workmanship, material and design for two (2) years from date of delivery to the extent that AMETEK will, at its sole option, repair or replace the instrument or any part thereof which is defective, provided, however, that this warranty shall not apply to instruments subjected to tampering or, abuse, or exposed to highly corrosive conditions.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES WHETHER EXPRESS OR IMPLIED AND AMETEK HEREBY DISCLAIMS ALL OTHER WARRANTIES, INCLUDING, WITHOUT LIMITATION, ANY WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY. AMETEK SHALL NOT BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING, BUT NOT LIMITED TO, ANY ANTICIPATED OR LOST PROFITS.

This warranty is voidable if the purchaser fails to follow any and all instructions, warnings or cautions in the instrument’s User Manual.

If a manufacturing defect is found, AMETEK will replace or repair the instrument or replace any defective part thereof without charge; however, AMETEK’s obligation hereunder does not include the cost of transportation, which must be borne by the customer. AMETEK assumes no responsibility for damage in transit, and any claims for such damage should be presented to the carrier by the purchaser.

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2.0 Safety instructions

Read this manual carefully before using the instrument!

In order to avoid any personal injuries and/or damage to the instrument all safety instructions and warnings must be observed.

The screen menus shown in this manual represent the menus displayed when using a B-version.

Disposal – WEEE Directive

These calibrators contain Electrical and Electronic circuits and must be recycled or disposed of properly (in accordance with the WEEE Directive 2002/96/EC).

Warning

About the use:

 The calibrator must not be used for any purposes other

than those described in this manual, as it might cause a hazard.

 The calibrator has been designed for indoor use only

and is not to be used in wet locations.

 The calibrator is not to be used in hazardous areas,

where vapour or gas leaks, etc. may constitute a danger of explosion.

 The calibrator is not designed for operation in altitudes

above 2000 meters.

 The calibrator is a CLASS I product and must be

connected to a mains outlet with a protective earth connection. Ensure the ground connection of the calibrator is properly connected to the protective earth before switching on the calibrator. Always use a mains power cable with a mains plug that connects to the protective earth.

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 To ensure the connection to protective earth any

extension cord used must also have a protective earth

conductor.

 Only use a mains power cord with a current rating as

specified by the calibrator and which is approved for the voltage and plug configuration in your area.

 Before switching on the calibrator make sure that it is

set to the voltage of the mains electricity supply.

 Always position the calibrator to enable easy and quick

disconnection of the power source (mains inlet socket).

 The calibrator must be kept free within an area of 20

cm on all sides and 1 metre above the calibrator due to fire hazard.

 Never use heat transfer fluids such as silicone, oil,

paste, etc. in the dry-block calibrators. These fluids may penetrate the calibrator and cause electrical hazard, damage or create poisonous fumes.

 The calibrator must be switched off before any attempt

to service the instrument is made. There are no user serviceable parts inside the calibrator.

 When cleaning the well or the insertion tube,

REMEMBER to wear goggles when using compressed

air in the dry-block calibrator and cleaning oil in the liquid bath calibrator.

 Use protection shield when calibrating at high

temperatures (RTC-700)

 The RTC-159 contains R-1270 and R-704 under

pressure. The calibrator must under no circumstances be stored at ambient temperatures

above 50°C ( 122°F) or operated at ambient temperatures above 40C (104F). Doing so may cause

a hazard.

About the front panel:

 For B and C versions only, the sockets on the input

module must NEVER be connected to voltages

exceeding 30V with reference to ground.

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 Thermostats must not be connected to any other

voltage sources during test.

About insertion tubes, insulation plugs, well and sensor:

 Never leave hot insertion tubes which have been

removed from the calibrator unsupervised – they may constitute a fire hazard or personal injury.

If you intend to store the calibrator in the optional

carrying case after use, you must ensure that the

instrument has cooled down to a temperature

below 100°C/212°F before placing it in the carrying

case.

 Never place a hot insertion tube in the optional carrying

case.

About the fuses:

 The fuse box must not be removed from the power

control switch until the mains cable has been disconnected.

 The two main fuses must have the specified current

and voltage rating and be of the specified type. The use of makeshift fuses and the short-circuiting of fuse holders are prohibited and may cause a hazard.

About the liquid bath (RTC-158/250 A/B/C only):

 For liquid bath ensure that the sensor is absolutely

clean and dry as a few drops of water in the well (liquid

baths) might cause a steam explosion.

 Do not pour cold fluid into a hot well – it might cause

an explosion.

 AMETEK Denmark A/S does not take any

responsibility, if the well is filled with other fluids than

those recommended.

 Liquid baths should only be operated by trained

personal.

 Heat transfer fluids must only be used in calibrators

prepared as a liquid bath. If these fluids are heated

above specified temperature they will create noxious or

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toxic fumes. Proper ventilation must be used.

 To avoid hazards from treating fluids in a wrong manner,

always reduce the "Max. SET-temperature allowed” in

the CALIBRATOR SETUP MENU according to the specifications of the fluid to be used. If using a calibrator outside of the fluids specifications there is a risk of fire hazards, personal Injury or chemical release. By reducing the "Max. SET-temperature allowed”, the calibrator cannot be used outside this temperature range. Be aware of the flash point, the boilling point and other fluid properties applicable to the usage when setting the Max. SET-temperature. Read the MSDS (Material Safety Data Sheet) of the liquid before use.

 Always remove the liquid from the calibrator before

transportation.

 Product information on the fluid must be carefully

investigated before use.

 Do not handle hot fluid.

 If the oil is heated beyond the flash point, it may

constitute a fire hazard.

 Do not pour water or any other fluids into a bath filled

with hot oil, because only a few drops of water might

cause a steam explosion, if poured into above 100°C

hot oil.

 Do not under any circumstances pour water on burning

oil. It might cause a dangerous steam explosion.

Caution – Hot surface

This symbol is engraved in the grid plate.

 Do not touch the grid plate, the well or the insertion

tube when the calibrator is heating up – they may be very hot and cause burns.

 Do not touch the lid or the spill tray when the calibrator

is heating up – they may be very hot and cause burns (RTC-158/250 A/B/C only).

127139 13 2014-07-30 13

 Do not touch the tip of the sensor when it is removed

from the insertion tube/well – it may be very hot and cause burns.

 Do not touch the handle of the calibrator during use – it

may be very hot and cause burns.

 Over 50°C/122°F

If the calibrator has been heated up to temperatures above 50°C/122°F, you must wait until the instrument

reaches a temperature below 50°C/122°F before you switch it off.

 Do not remove the insert from the calibrator before the

insert has cooled down to less than 50°C/122°F.

Caution – Cold surface

Below 0°C/32°F (applies only to the RTC-156/157/158/159

A

/B/C models)

 Do not touch the well or insertion tube when these are

below 0°C/32°F - they might create frostbite.

 If the calibrator has reached a temperature below

0°C/32°F, ice crystals may form on the insertion tube and on the well. This, in turn, may cause the material

surfaces to oxidize. To prevent this from happening, the insertion tube and the well must be dried. This is done by heating up the calibrator to min. 100°C/212°F until all water left has evaporated. Remove the insulation plug while heating up.

It is very important that humidity in the well and insertion tube is removed to prevent corrosion and frost expansion damages.

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Caution…

About the use:

 Do not use the instrument if the internal fan is out of

order.

 Before cleaning the calibrator, you must switch it off,

allow it to cool down and remove all cables.

About the liquid bath (RTC-158/250 A/B/C only):

 Be careful not to overfill the well with oil.

 Avoid getting silicone oil on the clothes. It is impossible

to wash off.

 The oil level rises several centimetres when the

temperature is rising. Please read instructions in section 3.3.2 about oil level. To stop overflow switch off the main power and the oil level will decrease when cooled down.

 Carefully wipe off all silicone oil from the sensor under

test to avoid spreading of the silicone oil.

 Be careful to select the right oil for the right task. Using

other than the recommended oils might cause damage

to the calibrator or degrade the performance.

 Remove excess hot fluid with the outmost care, as it

might be very hot.

 Do not attempt to remove hot fluid with the liquid

drainage tube, as it might melt.

About the well, insertion tube and sensor:

 The well and the insertion tube must be clean and dry

before use.

 Do not pour any form of liquids into the well. It might

damage the well or cause a hazard.

 Do not use any alkali, acid or ionic fluids in the

aluminium well as it might be damaged.

 Scratches and other damage to the insertion tubes

should be avoided by storing the insertion tubes carefully when not in use.

127139 13 2014-07-30 15

 The insertion tube must never be forced into the well.

The well could be damaged as a result, and the insertion tube may get stuck.

 Before using new insertion tubes for the calibration, the

insertion tubes must be heated up to maximum

temperature – 250°C (482°F) / 700°C (1292°F) - for a period of minimum 30 minutes (RTC-250/700 A/B/C only).

 The insertion tube must always be removed from the

calibrator after use.

The humidity in the air may cause corrosion oxidation

on the insertion tube inside the instrument. There is a risk that the insertion tube may get stuck if this is allowed to happen.

 If the calibrator is to be transported, the insertion tube

must be removed from the well to avoid damage to the

instrument.

 The tip of the sensor should rest at the bottom of the

sensor basket for optimum results (liquid baths only).

 Be careful not to submerge the handle or wire inlet of

the sensor-under-test in the fluid, as this might damage the sensor (liquid baths only).

Note…

The product liability only applies if the instrument is

subject to a manufacturing defect. This liability becomes void if the user fails to follow the instructions set out in this manual or uses unauthorized spare parts.

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3.0 Setting up the calibrator

3.1 Receipt of the calibrator

When you receive the instrument…

 Carefully unpack and check the calibrator and the accessories.

 Check the parts against the list shown below.

If any of the parts are missing or damaged, please contact the dealer who sold the calibrator.

You should receive:

 1 calibrator

 1 mains cable

 2 sets of test cables (2 black, 2 red –

B versions only)

 1 USB key containing software package

“JOFRACAL” and reference manual

 1 USB cable

 1 tool for insertion tube

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 1 traceable certificate (A versions)

 2 traceable certificates (C versions)

 3 traceable certificates (B versions)

 1 set of rubber cones for insulation plugs

(RTC-156/157/158/159/250 only)

 1 insulation collar (RTC-156 only)

 1 heat shield (RTC-700 only)

Caution

Do not use the RTC-158 insulation plug (black POM) with

the RTC-250 instrument due to the risk of melting.

Always use the correct - yellow/brown PEEK - insulation

plug with the RTC-250 instrument.

Calibration Certificate

Calibration Equipment

Calibration Results

Calibration Conditions

Calibration Traceability

Calibration Procedure

CALIBRATION INSTRUMENTS

xxxxxxxxxxxx

xxxx

xxxx xxxx xxxx xxxx

xxxxxx

Calibration Certificate

Calibration Equipment

Calibration Results

Calibration Conditions

Calibration Traceability

Calibration Procedure

CALIBRATION INSTRUMENTS

xxxxxxxxxxxx

xxxx

xxxx xxxx xxxx xxxx

xxxxxx

Calibration Certificate

Calibration Equipment

Calibration Results

Calibration Conditions

Calibration Traceability

Calibration Procedure

CALIBRATION INSTRUMENTS

xxxxxxxxxxxx

xxxx

xxxx xxxx xxxx xxxx

xxxxxx

Calibration Certificate

Calibration Equipment

Calibration Results

Calibration Conditions

Calibration Traceability

Calibration Procedure

CALIBRATION INSTRUMENTS

xxxxxxxxxxxx

xxxx

xxxx xxxx xxxx xxxx

xxxxxx

Calibration Certificate

Calibration Equipment

Calibration Results

Calibration Conditions

Calibration Traceability

Calibration Procedure

CALIBRATION INSTRUMENTS

xxxxxxxxxxxx

xxxx

xxxx xxxx xxxx xxxx

xxxxxx

Calibration Certificate

Calibration Equipment

Calibration Results

Calibration Conditions

Calibration Traceability

Calibration Procedure

CALIBRATION INSTRUMENTS

xxxxxxxxxxxx

xxxx

xxxx xxxx xxxx xxxx

xxxxxx

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RTC-158/250 A/B/C only (liquid bath) - OPTIONAL

 1 liquid bath kit consisting of :

- 1 sensor basket

- 2 lids for transportation / calibration

- 1 stirring magnet

- 1 stirring magnet remover

- 1 liquid drainage syringe

- 1 bottom shield

- 1 silicone oil

- 1 oil material safety data sheet

When reordering, please specify the part numbers found in the list of accessories, chapter 9.0.

Optional parts can also be found in the list of accessories.

Dow corning

Material data sheet

O

i

l

127139 13 2014-07-30 19

3.2 Preparing the dry-block calibrator

Warning

 The calibrator must not be used for any purposes other

than those described in this manual, as it might cause a hazard.

 The calibrator has been designed for indoor use only

and is not to be used in wet locations.

 The calibrator is not to be used in hazardous areas,

where vapour or gas leaks, etc. may constitute a danger of explosion.

 The calibrator is not designed for operation in altitudes

above 2000 meters.

 The calibrator is a CLASS I product and must be

connected to a mains outlet with a protective earth connection. Ensure the ground connection of the calibrator is properly connected to the protective earth before switching on the calibrator. Always use a mains power cable with a mains plug that connects to the protective earth.

 To ensure the connection to protective earth any

extension cord used must also have a protective earth

conductor.

 Only use a mains power cord with a current rating as

specified by the calibrator and which is approved for the voltage and plug configuration in your area.

 Before switching on the calibrator make sure that it is

set to the voltage of the mains electricity supply.

 Always position the calibrator to enable easy and quick

disconnection of the power source (mains inlet socket).

The calibrator must be kept free within an area of 20

cm on all sides and 1 metre above the calibrator due to fire hazard.

20 2014-07-30 127139 13

 The RTC-159 contains R-1270 and R-704 under

pressure. The calibrator must under no circumstances

be stored at ambient temperatures above 50°C ( 122°F) or operated at ambient temperatures above 40C (104F). Doing so may cause a hazard.

Note…

The instrument must not be exposed to draughts.

127139 13 2014-07-30 21

Fig. 1

3.2.1 When setting up the dry-block calibrator, you must…



Place the calibrator on an even horizontal surface where you intend to use it.

Caution…

 Do not use the instrument if the internal fan is out of

order.



Ensure a free supply of air to the internal fan located at the bottom of the instrument. The area around the calibrator should be free of draught, dirt, flammable substances, etc.

2

4

3

5

1

22 2014-07-30 127139 13



Check that the fuse size corresponds to the applied voltage on The fuse is contained in the power control switch (on/off switch To check do as follows (see fig. 1):

Warning

The two main fuses must have the specified current and voltage rating and be of the specified type. The use of makeshift fuses and the short-circuiting of fuse holders are

prohibited and may cause a hazard.

A. Open the fuse box lid using a screwdriver. B. Take out the fuse box. C. Remove both fuses replacing them with two new fuses.

These must be identical and should correspond to the line voltage. See chapter 9.0.

B. Slide the fuse box back into place.



Check that the earth connection for the instrument is present and attach the cable.



Select an insertion tube with the correct bore diameter. See section 3.2.2 for information on how to select insertion tubes.

The calibrator is now ready for use.

127139 13 2014-07-30 23

3.2.2 Choice of insertion tube

Caution…

To get the best results out of your calibrator, the insertion tube dimensions, tolerance and material are critical. We highly advise using the JOFRA insertion tubes, as they

guarantee trouble free operation. Use of other insertion

tubes may reduce performance of the calibrator and cause the insertion tube to get stuck.

Caution…

Before using new insertion tubes for calibration in the RTC-

250/700 instruments, the insertion tubes must be heated up

to maximum temperature 250°C (482°F) / 700°C (1292°F) for a period of minimum 30 minutes.

Insertion tubes are selected on the basis of the diameter of the sensor to be calibrated. Use the table for insertion tubes in chapter 9.0 to find the correct part number.

Alternatively, you may order an undrilled insertion tube and drill the required hole yourself. The finished dimensions should be as follows:

 Sensor diameter +0.2mm

+0.05/-0

 DLC hole : Ø3.1mm

+0.05/-0 (RTC-156/157/158/159/250 A/B/C)

Ø4.2mm

+0.05/-0 (RTC-700 A/B/C)

 Reference sensor holes : Ø4.2mm

+0.05/-0 and Ø6.55mm +0.05/-0

For RTC-156/157/158/159 A/B/C only: In order to get optimum results and prevent ice from building up in the

well of the cooling calibrators, a proper sized insulation plug must be placed over the well during the calibration process.

The holes in the plug must have a tight fit and unused holes must be covered using e.g. silicone plugs (spare part no. 126280).

24 2014-07-30 127139 13

3.2.3 Inserting the sensors

Before inserting the sensors and switching on the calibrator, please note the following important warning:

Warning

Never use heat transfer fluids such as silicone, oil, paste,

etc. in the dry-block calibrators. These fluids may penetrate the calibrator and cause electrical hazard, damage or create poisonous fumes.

Insert the sensors as shown in fig. 2.

Fig. 2

The DLC sensor must be placed in the hole that is intended for the DLC sensor. Standard insertion tubes from AMETEK Denmark are

Reference sensor (if available)

Sensor under test

DLC sensor (if available)

127139 13 2014-07-30 25

marked with a dot on the rim to indicate the placement of the DLC hole, and the insulation plugs are marked with the letter D (RTC156/157/158/159/250 A/B/C only). See fig. 3.

Fig. 3

Caution…

 The well and the insertion tube must be clean before

use.

 Scratches and other damage to the insertion tubes

should be avoided by storing the insertion tubes carefully when not in use.

 The insertion tube must never be forced into the well.

The well could be damaged as a result, and the insertion tube may get stuck.

Caution – Hot surface

 Do not touch the grid plate, the well or the insertion

tube while the calibrator is heating up – they may be very hot and cause burns.

 Do not touch the tip of the sensor when it is removed

from the insertion tube – it may be very hot and cause

Dot indicating placement of the DLC hole

D indicating placement of the DLC hole

Insulation plug

Insertion tube

26 2014-07-30 127139 13

burns.

 Do not touch the handle of the calibrator during use –

it may be very hot and cause burns.

 Do not remove the insert from the calibrator before the

insert has cooled down to less than 50°C/122°F.

Caution – Cold surface

 If the calibrator has reached a temperature below

0°C/32°F, ice crystals may form on the insertion tube and on the well. This, in turn, may cause the material surfaces to oxidize.

To prevent this from happening, the insertion tube and

the well must be dried. This is done by heating up the calibrator to min. 100°C/212°F until all water left has evaporated.

Remove the insulation plug while heating up. It is very important that humidity in the well and

insertion tube is removed to prevent corrosion and frost expansion damages.

 Do not touch the well or insertion tube when these are

below 0°C/32°F – they might create frostbite.

3.3 Preparing the liquid bath calibrator (RTC158/250 A/B/C only)

Warning

 The calibrator must not be used for any purposes other

than those described in this manual, as it might cause a hazard.

 The calibrator has been designed for indoor use only

and is not to be used in wet locations.

 The calibrator is not to be used in hazardous areas,

where vapour or gas leaks, etc. may constitute a danger of explosion.

 The calibrator is not designed for operation in altitudes

above 2000 meters.

 The calibrator is a CLASS I product and must be

127139 13 2014-07-30 27

connected to a mains outlet with a protective earth connection. Ensure the ground connection of the calibrator is properly connected to the protective earth before switching on the calibrator. Always use a mains power cable with a mains plug that connects to the protective earth.

 To ensure the connection to protective earth any

extension cord used must also have a protective earth

conductor.

 Only use a mains power cord with a current rating as

specified by the calibrator and which is approved for the voltage and plug configuration in your area.

 Before switching on the calibrator make sure that it is

set to the voltage of the mains electricity supply.

 Always position the calibrator to enable easy and quick

disconnection of the power source (mains inlet socket).

 Liquid baths should only be operated by trained

personal.

 AMETEK Denmark A/S does not take any

responsibility, if the well is filled with other fluids than those recommended.

 Heat transfer fluids must only be used in calibrators

with a liquid bath. If these fluids are heated above specified temperature they will create noxious or toxic fumes. Proper ventilation must be used.

 Product information on the fluid must be carefully

investigated before use.

 The calibrator must be kept free within an area of 20

cm on all sides and 1 metre above the calibrator due to fire harzard.

Note…

The instrument must not be exposed to draughts.

28 2014-07-30 127139 13

Fig. 4

3.3.1 When setting up the liquid bath calibrator, you must…



Place the calibrator on an even horizontal surface where you intend to use it. Place it in a way that will minimize the risk of tilting.

Caution…

 Do not use the instrument if the internal fan is out of

order.

 The well must be clean before use.

Reference sensor (if available)

1

2

4

5

7

9

3

6

8

O

i

l

127139 13 2014-07-30 29



Ensure a free supply of air to the internal fan located at the bottom of the instrument. The area around the calibrator should be free of draught, dirt, flammable substances, etc.



Check the voltage of the power control switch (on/off switch (230V/115V)). If the voltage of the power control switch differs from the line voltage, you must adjust the setting of the power control switch as follows (see fig. 4):

Warning

The two main fuses must have the specified current and voltage rating and be of the specified type. The use of makeshift fuses and the short-circuiting of fuse holders are prohibited and may cause a hazard.

A. Open the fuse box lid using a screwdriver. B. Take out the fuse box. C. Remove both fuses and insert two new fuses.

These must be identical and should correspond to the line voltage. See chapter 9.0.

B. Turn the fuse box 180° and slide it into place.



Check that the earth connection for the instrument is present and attach the cable.



Place the parts from the liquid bath kit in the well in the following order:

 Bottom shield – It is very important that the bottom

shield is placed in the well before any calibration is attempted, as the bottom shield protects the well from being damaged during calibration.

 Stirring magnet – It is very important that the stirring

magnet is in place and spinning before any calibration is attempted. The stirring magnet ensures minimum temperature gradient in the fluid. The magnets teflon cover will over time be worn down, leaving the magnet flat on one side. This will reduce the spinning ability. A magnet with a flat side must therefore be replaced.

Ametek RTC-158 A, RTC-156 B, RTC-157 C, RTC-158B, RTC-157 B Reference Manual

Specifications and Main Features

Frequently Asked Questions

User Manual