Fluke 7109A Operating Manual

6109A/7109A

Portable Calibration Baths

January 2017

© 2017 Fluke Corporation. All rights reserved. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.

Operators Manual

LIMITED WARRANTY AND LIMITATION OF LIABILITY

Each Fluke product is warranted to be free from defects in material and workmanship under normal use and
service. The warranty period is one year and begins on the date of shipment. Parts, product repairs, and
services are warranted for 90 days. This warranty extends only to the original buyer or end-user customer of
a Fluke authorized reseller, and does not apply to fuses, disposable batteries, or to any product which, in
Fluke's opinion, has been misused, altered, neglected, contaminated, or damaged by accident or abnormal
conditions of operation or handling. Fluke warrants that software will operate substantially in accordance
with its functional specifications for 90 days and that it has been properly recorded on non-defective media.
Fluke does not warrant that software will be error free or operate without interruption.

Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers
only but have no authority to extend a greater or different warranty on behalf of Fluke. Warranty support is
available only if product is purchased through a Fluke authorized sales outlet or Buyer has paid the
applicable international price. Fluke reserves the right to invoice Buyer for importation costs of
repair/replacement parts when product purchased in one country is submitted for repair in another country.

Fluke's warranty obligation is limited, at Fluke's option, to refund of the purchase price, free of charge repair,
or replacement of a defective product which is returned to a Fluke authorized service center within the
warranty period.

To obtain warranty service, contact your nearest Fluke authorized service center to obtain return
authorization information, then send the product to that service center, with a description of the difficulty,
postage and insurance prepaid (FOB Destination). Fluke assumes no risk for damage in transit. Following
warranty repair, the product will be returned to Buyer, transportation prepaid (FOB Destination). If Fluke
determines that failure was caused by neglect, misuse, contamination, alteration, accident, or abnormal
condition of operation or handling, including overvoltage failures caused by use outside the product’s
specified rating, or normal wear and tear of mechanical components, Fluke will provide an estimate of repair
costs and obtain authorization before commencing the work. Following repair, the product will be returned to
the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges
(FOB Shipping Point).

THIS WARRANTY IS BUYER'S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. FLUKE SHALL NOT BE LIABLE
FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR LOSSES,
INCLUDING LOSS OF DATA, ARISING FROM ANY CAUSE OR THEORY.

Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion or
limitation of incidental or consequential damages, the limitations and exclusions of this warranty may not
apply to every buyer. If any provision of this Warranty is held invalid or unenforceable by a court or other
decision-maker of competent jurisdiction, such holding will not affect the validity or enforceability of any other
provision.

Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
U.S.A.

Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands

11/99

Table of Contents

Title Page

Introduction ............................................................................................ 1

Contact Fluke Calibration ...................................................................... 1

Safety Information ................................................................................. 2

Symbols ................................................................................................. 3

Specifications ........................................................................................ 4

Temperature Source Specifications .................................................. 4

Input Module Option Specifications ................................................... 5

General Specifications ....................................................................... 6

Unpack the Product ............................................................................... 7

Product Overview .................................................................................. 7

Top .................................................................................................... 7

Front .................................................................................................. 9

Control Panel ..................................................................................... 10

Back ................................................................................................... 11

Input Module (Option) ........................................................................ 12

Installation ............................................................................................. 12

Product Placement ............................................................................ 12

Provide Ventilation ............................................................................. 13

Add Bath Fluid ................................................................................... 13

Attach the Probe Access Cover ......................................................... 14

Connect to Mains Power ................................................................... 14

Attach Accessories ............................................................................ 16

Fluid Overflow Accessory .............................................................. 16

Probe Clamp .................................................................................. 17

Adjustable Probe Fixture ............................................................... 18

Turn On the Product .............................................................................. 19

Set the Language, Time, and Date .................................................... 19

Set the Password .............................................................................. 20

Connect the Reference Probe and Test Sensor.................................... 20

Connect the Reference Probe ........................................................... 20

Configure the Reference Probe Coefficients ..................................... 22

Connect a Test RTD .......................................................................... 22

Configure the RTD Type .................................................................... 23

Connect a Thermocouple .................................................................. 23

Configure the Thermocouple Type .................................................... 24

Connect a 4–20 mA Transmitter ........................................................ 24

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6109A/7109A

Operators Manual

Configure the mA Input ...................................................................... 24

Operation ............................................................................................... 25

Display ............................................................................................... 25

Basic Operations ............................................................................... 26

Immerse Temperature Probes ....................................................... 26

Set the Setpoint ............................................................................. 26

Preset Setpoints ............................................................................ 27

Set the Cutout ................................................................................ 27

Stop Heating or Cooling ................................................................ 27

Select the Temperature Unit .......................................................... 27

Control the Bath Temperature with a Reference Probe ................ 28

Keyboard Use ................................................................................ 28

Recording Temperature ................................................................. 28

Run a Program .................................................................................. 29

Menu Guide ........................................................................................... 30

Monitor ............................................................................................... 30

Setpoint ............................................................................................. 31

Program ............................................................................................. 32

Setup ................................................................................................. 35

Remote Operation ................................................................................. 42

Setup ................................................................................................. 42

USB Device ....................................................................................... 42

RS-232 .............................................................................................. 43

Test .................................................................................................... 43

Commands ............................................................................................ 44

SCPI Conformance Information ......................................................... 44

Command Reference ........................................................................ 44

Maintenance .......................................................................................... 65

Clean the Product .............................................................................. 65

Clean Up Spills .................................................................................. 65

Check the Bath Fluid ......................................................................... 66

Drain the Bath Fluid ........................................................................... 66

Transport the Calibration Bath ........................................................... 67

Calibrate the Product ............................................................................. 67

Temperature Setpoint Calibration ...................................................... 68

Temperature Stability Calibration ...................................................... 69

Temperature Uniformity Calibration ................................................... 70

Input Module Calibration .................................................................... 71

Troubleshooting ..................................................................................... 74

Fluid Selection ....................................................................................... 76

Temperature Range .......................................................................... 76

Safety ................................................................................................ 76

Viscosity ............................................................................................ 77

Heat Capacity .................................................................................... 77

Thermal Expansion ............................................................................ 77

Lifetime .............................................................................................. 77

Disposal ............................................................................................. 78

Silicone Fluids ................................................................................... 78

Customer-Replaceable Parts and Accessories ..................................... 79

ii

Introduction

The Fluke Calibration 7109A and 6109A Portable Calibration Baths (the Product)
accurately calibrate a variety of temperature sensors. The bath fluid volume is
large enough to immerse up to four 38 mm (1.5 inch) flanged tri-clamp probes and
a reference thermometer. The 7109A tests the temperature range of -25 °C to
140 °C. The 6109A covers the temperature range of 35 °C to 250 °C. Traceable
NVLAP accredited calibration is included. Models that equipped with the Input
Module can also measure an RTD, thermocouple, or 4-20 mA transmitter and a
reference PRT. This functionality makes the Product a complete calibration
solution.

Contact Fluke Calibration

To contact Fluke Calibration, call one of the following telephone numbers:

• Technical Support USA: 1-877-355-3225

• Calibration/Repair USA: 1-877-355-3225

• Canada: 1-800-36-FLUKE (1-800-363-5853)

• Europe: [phone]

• Japan: [phone]

• Singapore: [phone]

• China: [phone]

• Brazil: [phone]

• Anywhere in the world: [phone]

To see product information or download manuals and the latest manual
supplements, visit Fluke Calibration’s website at www.flukecal.com.

To register your product, visit http://flukecal.com/register-product.

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Operators Manual

Safety Information

A Warning identifies conditions and procedures that are dangerous to the user. A
Caution identifies conditions and procedures that can cause damage to the
Product or the equipment under test.

Warning

To prevent possible electrical shock, fire, or personal injury:

• Read all safety information before you use the Product.

• Do not keep the Product in operation and unattended at high

temperatures.

• Use the Product only as specified, or the protection
supplied by the Product can be compromised.

• Turn the Product off and remove the mains power cord.
Stop for two minutes to let the power assemblies discharge
before you open the fuse door.

• Replace a blown fuse with exact replacement only for
continued protection against arc flash.

• Use only specified replacement fuses.

• Use only specified replacement parts.

• Disconnect the mains power cord before you remove the

Product covers.

• Disable the Product if it is damaged.

• Do not use the Product if it is altered or damaged.

• Do not heat bath fluid above its flash point unless it is

necessary, approved, and handled safely. The bath fluid or
its vapor may be flammable.

• Connect an approved three-conductor mains power cord to
a grounded power outlet.

• Use this Product indoors only.

• Do not use a two-conductor mains power cord unless you

install a protective ground wire to the Product ground
terminal before you operate the Product. Make sure that the
Product is grounded before use.

• Do not touch parts of the Product that can be hot, including
the area around the tank, the bath fluid, the overflow tube,
overflow tank, and drain tube.

2

• Refer to the bath fluid and solvent’s safety data sheets
(SDS) as these may require additional safety precautions.

• Do not spill bath fluid on the floor. Spilled bath fluid creates
a safety hazard.

Portable Calibration Baths

Symbols

Symbols

The symbols used in this manual and on the Product are shown in Table 1.

Table 1. Symbols

Symbol Description

 WARNING. HAZARDOUS VOLTAGE. Risk of electric shock.
 WARNING.RISK OF DANGER.

 WARNING. HOT SURFACE. Risk of burns.





Consult user documentation.

Certified by CSA Group to North American safety standards.

Conforms to European Union directives.

 Conforms to relevant Australian EMC standards.
 Fuse

 Conforms to relevant South Korean EMC Standards.

This product complies with the WEEE Directive marking requirements. The affixed label
indicates that you must not discard this electrical/electronic product in domestic household



waste. Product Category: With reference to the equipment types in the WEEE Directive
Annex I, this product is classed as category 9 "Monitoring and Control Instrumentation"
product. Do not dispose of this product as unsorted municipal waste.

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6109A/7109A

Operators Manual

Specifications

Temperature Source Specifications

The product specifications describe the Absolute Instrumental Uncertainty of the
Product at 95 % level of confidence (coverage factor k = 2) within one year from
calibration. The product specifications include environmental temperature effects
from 13 °C to 33 °C.

6109A 7109A

Range
(at 25 °C ambient temperature)

35 °C to 250 °C

-25 °C to 140 °C
(-15 °C cover off)

Accuracy: Maximum Permissible Error 0.1 °C 0.1 °C

Stability 0.015 °C 0.01 °C

Typical Uniformity

0.03 °C up to 200 °C

0.04 °C above 200 °C

0.02 °C

Repeatability 0.04 °C 0.04 °C

Typical Heating Time

Typical Cooling Time

35 °C to 100 °C:
25 minutes

100 °C to 250 °C:
45 minutes

250 °C to 100 °C:
35 minutes

100 °C to 35 °C:
55 minutes

25 °C to 140 °C:
55 minutes

-25 °C to 25 °C:
35 minutes

25 °C to -25 °C:
75 minutes

140 °C to 25 °C:
45 minutes

Typical Settling Time 15 minutes 10 minutes

Notes:

• The lower limit of the Temperature Range varies depending on the ambient temperature and whether the tank is covered.

Operating time at negative temperatures may be limited by water condensation or ice build-up, especially if the tank is
open.

• Accuracy covers all sources of error including calibration uncertainty, stability, uniformity, and repeatability.

• If the environment temperature is outside the Performance Environment Range but within the Operating Environment

Range, multiply the specification by 1.25.

• Temperature Stability and Temperature Uniformity apply with the tank covered. If the Product is operated with the tank

open, multiply the specifications by 1.25.

• Specifications are valid with fluid depth at least 130 mm and within the working volume defined as a 75 mm square

centered in the tank opening from 15 mm above the bottom of the tank to 65 mm below the surface of the fluid. The
specifications also apply with the recommended fluid in good condition. Results may vary if a different fluid is used.

• Temperature Stability is evaluated as two times the statistical standard deviation of the fluid temperature (2 sigma) during

a 15-minute period after sufficient settling time is allowed.

• Temperature Uniformity is defined as half the difference between the maximum and minimum temperatures within the

working volume.

• Repeatability includes hysteresis of the control sensor. It is defined as the difference between the maximum and

minimum observed temperatures at a setpoint near the middle of the Product Temperature Range after that setpoint is
alternately reached from both extremes of the Temperature Range.

• Cooling or heating time is measured from the time the setpoint is changed to when the fluid temperature reaches the

setpoint within the Temperature Accuracy specification. Cooling and heating times vary depending on environment
temperature, AC supply voltage, loading, and whether the tank is covered. At low ac supply voltages, heating time may be
much longer.

• Settling time is measured from the end of the cooling or heating time to the time at which the fluid reaches its ultimate

mean temperature within a tolerance equal to the Temperature Stability specification.

4

Portable Calibration Baths

Specifications

Input Module Option Specifications

The Product specifications describe the Absolute Instrumental Uncertainty of the
Product at 95 % level of confidence (coverage factor k = 2) within one year from
calibration. The Input Module specifications include calibration uncertainty,
linearity, repeatability, resolution, stability, and environmental temperature effects
from 13 °C to 33 °C.

Function Range

Maximum Permissible Error

Accuracy:

0 Ω to 42 Ω 0.0025 Ω

Reference Input Resistance

42 Ω to 400 Ω 0.006 %

Reference Input Temperature -25 °C to 250 °C 0.007 % + 0.015 °C

Resistance Sensing Current 1 mA 8 %

0 Ω to 31 Ω 0.0025 Ω

DUT 4-wire Resistance

31 Ω to 400 Ω 0.008 %

DUT 3-wire Resistance Accuracy 0 Ω to 400 Ω 0.12 Ω

Thermocouple mV -10 mV to 100 mV 0.025 % + 0.01 mV

Reference Junction Temperature 0 °C to 40 °C 0.35 °C

J: 0.44 °C
K: 0.49 °C
T: 0.53 °C

-25 °C to 250 °C

E: 0.44 °C
N: 0.57 °C
M: 0.48 °C

Thermocouple Temperature

L: 0.42 °C
U: 0.48 °C

R: 1.92 °C
S: 1.88 °C

0 °C to 250 °C

C: 0.84 °C
D: 1.12 °C
G/W: 3.34 °C

mA 0 mA to 22 mA 0.02 % + 0.002 mA

Notes

• Specifications stated in percent are percent of reading.

• If the environment temperature is outside the Performance Environment Range but within the Operating Environment

Range, multiply the accuracy specifications by 1.5.

• Reference Input Temperature Accuracy assumes a 4-wire, 100 Ω, α = 0.00392 PRT. The specification does not include

accuracy of the thermometer (see Table 4 of this manual).

• DUT Input Resistance Accuracy specification for 2-wire sensors is 0.05 Ω plus lead wire resistance.

• Thermocouple Input Temperature Accuracy specification includes Thermocouple Input mV and Reference Junction

Temperature, combined using the root-sum-square method. The specification does not include the accuracy of the
thermocouple.

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6109A/7109A

Operators Manual

General Specifications

Performance Environment Range ..................................... 13 °C to 33 °C

5 % to 90 % (non-condensing)

Operating Environment Range ......................................... 0 °C to 40 °C

5 % to 90 % (non-condensing)

Maximum Operating Altitude ............................................ 2000 m (6600 ft)

Storage Range ................................................................. -40 °C to 70 °C

5 % to 95 % (non-condensing)

Supply Voltage ................................................................. 115 V nominal: 100 V to 120 V ac (±10 %),

50 Hz or 60 Hz

230 V nominal: 200 V to 230 V ac (±10 %),
50 Hz or 60 Hz
1150 W

Fuses ................................................................................ 115 V nominal: 10 A, 250 V 3AG slow

230 V nominal: 5 A, 250 V 5x20 slow

4-20 mA Input Loop Power Voltage .................................. 24 V dc ±6 V

4-20 mA Fuse ................................................................... 0.05 A, 250 V 5x20 fast

Size
Width: 242 mm (9.5 in)
Depth: 400 mm (15.7 in)
Weight
6109A: 16 kg (35 lb)

Fluid Volume ..................................................................... 2.5 liters (0.66 gal)

Fluid Working Area ........................................................... 75 mm x 75 mm (3 in x 3 in)

Maximum Fluid Depth ....................................................... 154 mm

Remote Interface .............................................................. RS-232 port, 1200 to 38400 baud

USB 2.0 device port
USB 2.0 host port (for data recording)

Compliance ....................................................................... EN 61010-1 (2010), category II, degree 2

IEC 61326-1, basic
RoHS
SCPI 1999.0

Notes

[1] Size does not include the optional overflow kit or other attached accessories.

[2] Weight does not include bath fluid or accessories.

[1]

............................................................................... Height: 382 mm (15 in)

[2]

........................................................................... 7109A: 20 kg (45 lb)

6

Portable Calibration Baths

Unpack the Product

Unpack the Product

Carefully unpack the Product. Save the shipping carton for later use in case the
Product needs to be shipped or moved to another facility. Make sure that there is
no damage to the Product. If any parts are damaged, contact Fluke Calibration. If
it is necessary to reship the Product, use the original container. To order a new
container, see Contact Fluke Calibration.

Warning

To prevent possible electrical shock, fire, or personal injury:

• Disable the Product if it is damaged.

• Do not use the Product if it is damaged or altered.

Check that all items listed below are present and have no visible damage.

• The Product

• Mains power cord (see Figure 6)

• USB cable

• Probe access cover

• Transport tank cover

• Printed safety information

• Product CD

• Report of calibration with label

• Clamp-on ferrite (-P models)

• Din connector (-P models)

• Test lead kit (-P models)

The Product CD contains:

• Operators manual in multiple languages

• USB driver

• Software distribution licenses

• Source code for public-domain software

Product Overview

This section is a reference for the Product features, parts, and user interface (UI).

Top

The Product top and tank are shown in Figure 1.

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6109A/7109A

Operators Manual

9

8

1

2

10

4

3

Number Description











Tank - The stainless steel tank contains the bath fluid.

Bath Fluid - Temperature sensors are inserted into the bath fluid for calibration. Heating
and cooling devices attached to the walls of the tank heat and cool the bath fluid.

Control Sensor - The precision platinum resistance thermometer (PRT) measures and
controls the temperature of the bath fluid.

Stir Motor Cover - Protects the stir motor.

Stir Motor (under the Stir Motor cover) - The stir motor drives the propeller that circulates
the fluid to produce a uniform temperature. The stir motor turns on when control is
enabled.

Stir Guard - Separates the working area of the tank from the stir propeller. MIN and MAX
marks on the stir guard show the correct fill levels.

5

6

7

11

icu07.eps

8









Propeller - Stirs the bath fluid.

Carrying Handle - Use the handle to lift or move the Product. There are also recessed
handles on the sides of the Product (not shown).

Ready Indicator - Changes from amber to green when the bath fluid temperature has
settled at the setpoint. Green indicates that the Product is ready for measurement.

Threaded Holes (M4) - Used to attach accessories to the Product.

Tank Cover - Isolates the bath fluid from the environment, reduces fumes, prevents
objects from falling into the tank, and keeps the fluid temperature stable. The tank cover
attaches to the top panel with four thumb screws.

Figure 1. Top of the Product

Portable Calibration Baths

Product Overview

Front

The front of the Product is shown in Figure 2.

5

1

2

3

4

6

icu01.eps

Number Description

Fan - Cools the tank and heating devices. Keep at least 150 mm of open space around the













Product and 300 mm behind it to avoid obstruction of the air flow. Keep objects away from
the fan opening as the fan produces strong suction.

USB Host Port - Use this port to record temperature data to a memory device.

USB Device Port - Like the RS-232 Port, this USB device port can be used to control the
Product.

RS-232 Port - Like the USB Device Port, this port can be used to control the Product
remotely.

Control Panel - See Control Panel.

Process Input Module - This optional module measures electrical temperature sensors for
calibration.

Figure 2. Front of the Product

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6109A/7109A

Operators Manual

Control Panel

The control panel is shown in Figure 3.

1

2

F1 F2 F3 F4

PORTABLE CALIBRATION BATH

6109A

35˚C TO 250˚ C

MONITOR

SETPOINT

BACK

PROGRAM

SETUP

SELECT
ENTER

798

46

5

3

2

1

.

0

STOP

3

4

5

6

icu05.eps

Number Description



Display - Shows the information about the operation of the Product such as the fluid
temperature and setpoint.

Softkeys - These keys correspond to the display icons directly above each key. The
functions change with the status of the display. In many menus  is labeled Done.



It returns the screen to the first menu.
As you type numbers for settings,  acts as a backspace key. This deletes the last

digit in the number. If a setting accepts a number in exponential notation,  works
as an exponent key.









Mode Keys - , , , and  access different groups of settings. Some
mode keys light up when the mode is active.

Other Keys - Controls used to operate the Product. There are numbers, cursor keys,
and  to make menu choices.

 - Returns the UI to the prior menu.
 and  - Use to move the cursor up or down.
 and  - Use to move the cursor left or right.

Number keys (0-9) - Use the ten number keys to enter decimal numbers. If a setting
accepts an exponential number, a special exponent key is shown as one of the softkeys.
Push  to save the number.

 - Change a selected item. After the setting is changed, push  to save the new
value. Settings that have only binary states, such as ON or OFF, are changed and
saved with a single push.

 Hot Warning Indicator - This indicator lights up if the fluid temperature is ≥60 °C. This
warns that the bath fluid, tank cover, and area around the tank are hot and should not
be touched. If the Product is switched off, the indicator stays on until the Product
reaches a safe temperature. It flashes at a slow rate to conserve energy.

 - Immediately disables heating and cooling and switches off the stir motor.

Figure 3. Control Panel

10

Portable Calibration Baths

Product Overview

Back

The back of the Product is shown in Figure 4.

1

2

3

4

Number Description

Fan Vents - As the Product cools, a heavy air stream flows from the fan vents. Keep at



least 300 mm of open space behind the Product to avoid an obstructed air flow. There
are also ventilation slots on the sides of the Product (not shown).

5

6

7

8

icu09.eps















Mains Power Socket - A grounded male three-prong connector that accepts the mains
power cord. Connect the Mains power cord here.

Power Switch - Toggle this switch to I to turn on the Product. Toggle this switch to O to
turn off the Product.

Fuses - Protect the Product from excessive current. If a fuse appears to be blown,
contact Fluke Calibration for assistance. See Contact Fluke Calibration.

Overflow Tube - Directs excess bath fluid into the optional overflow container. If the
overflow kit is not used, keep the overflow tube plugged and reduce the fluid level to
allow for thermal expansion.

Overflow Container Mounting Bracket – Holds the optional overflow container (not
shown).

Drain Cover - Keep the drain plug (not shown) on tight and the drain cover in place for
normal operation.

Drain Tube - The drain tube (not visible) makes it easy to remove the bath fluid for
replacement or Product transport.

Figure 4. Back of the Product

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6109A/7109A

Operators Manual

Input Module (Option)

The 7109A-P and 6109A-P come with an Input Module that measures various
types of temperature sensors. This optional input module is shown in Figure 5.

1

2

Number Description









Current Fuse - Protects the Input Module and connected devices from accidental short
circuit. Replace the fuse only with the same type: 5 mm × 20 mm, 50 mA, fast-acting.

RTD Terminals - A test RTD connects to these terminals. The graphic on the panel shows
the circuit diagram for a four-wire RTD.

Reference PRT Connector - A reference probe plugs into this socket. The connector
accepts a Fluke INFO-CON plug with a memory device that stores probe coefficients.

Thermocouple Input - A miniature thermocouple connector.

F 50 mA 250V

3

4

5

icu02.eps



Transmitter Terminals - A 4-20 mA transmitter connects to the two transmitter terminals
labeled mA LOOP and COM.

Installation

The subsequent sections explain safe and correct Product installation.

Product Placement

To prevent possible electrical shock, fire, or personal injury, do
not restrict access to the Product mains power cord. The mains
power cord is the mains disconnecting device.

Place the unpacked Product on a clean, sturdy, flat surface in a spacious location
with good environmental control. There must be at least 150 mm (6 inches) of
space around the front and sides and 300 mm of open space behind the Product
for the ventilation and cooling fans to operate properly. The environment must
maintain a steady, moderate temperature and dissipate up to 1000 W of heat
produced by the Product. Avoid air drafts and temperature fluctuations that could
adversely affect the temperature stability of the Product.

Figure 5. Input Module Option

Warnings

12

Portable Calibration Baths

Installation

Provide Ventilation

Warning

To prevent personal injury:

• Read the bath fluid safety data sheet (SDS) and take
necessary precautions. Some fluids are corrosive, toxic, or
irritate the skin, eyes, nose, and respiratory organs.

• Use a ventilation system to remove vapor.

• Do not use fluids that are corrosive to stainless steel.

Harmful substances such as benzene and formaldehyde can be produced above
a certain temperature. The safety data sheet for a silicone fluid typically states
149 °C for this temperature.

Bath fluid vapors present a fire hazard, especially when the bath fluid is operated
above its flash point. Bath fluid vapors tend to condense onto surrounding
surfaces. This can contaminate materials and inhibit laboratory cleanliness. If
enough condensation accumulates on the floor, the floor becomes slippery and
creates a safety hazard.

For appropriate fume extraction use a ventilation duct of at least 75 mm
(3 inches) in diameter with an air flow rate between 1.4 cubic meters and

1.7 cubic meters per minute (50 cfm to 60 cfm). Place the inlet of the ventilation
duct near the top of the tank.

Add Bath Fluid

The choice of bath fluid is important for the Product to achieve full temperature
range and performance specifications. Table 2 lists the recommended bath fluid
for each model.

Fluke 5012 Silicone, 10 centistoke Fluke 5014 Silicone, 50 centistoke

Table 2. Recommended Bath Fluids

7109A 6109A

13

6109A/7109A

Operators Manual

MAX level, 154 mm MIN level, 128 mm

Other bath fluids can be used, but the temperature range may be more limited.
Temperature stability and uniformity also varies when other fluids are used. As a
rule, bath fluid viscosity should be no greater than 50 centistokes at any
operating temperature. See Fluid Selection for more information.

Silicone fluid expands as it is heated. This can cause the bath fluid to spill out of
the tank. Use the optional overflow kit or fill the tank to a lower level. The stir
guard has marks MAX and MIN to show the proper fill levels. Fill the tank to the
MIN level if the plug is left in the overflow tube. Fill to the MAX level if the
overflow kit is used. Table 3 gives the recommended fill levels as measured from
the bottom of the tank.

Table 3. Fluid Fill Levels

Overflow Kit Installed Overflow Tube Plugged

Note

Remove the plug from the overflow tube if the tank is filled to
maximum depth.

To add bath fluid:

1. Remove the tank cover.

2. Pour the bath fluid in through the tank opening.

3. Replace the cover and tighten its thumb screws.

4. Clean up any drips or spills. Do not get fluid on the control panel.

Attach the Probe Access Cover

Keep the tank covered when you operate the Product to ensure temperature
stability, uniformity, and accuracy. Use the provided probe access cover. The
cover holes fit many types of temperature sensors. Use the thumb screws to
fasten the cover to the top panel. Make sure the rubber gasket is properly
seated.

Connect to Mains Power

To prevent possible electrical shock, fire, or personal injury,
connect the factory-supplied three-conductor mains power cord
to a properly-grounded power outlet. Do not use a two­conductor adapter or extension cord, as it will break the
protective ground connection.

Use the provided mains power cord to connect the Product to a 150 V ac or
230 V ac outlet (this depends on the model). The circuit, outlet, and mains power
cord must all be rated at 115 V ac, 10 A at 230 V ac.

Warning

14

Portable Calibration Baths

Installation

The Product comes with the appropriate line power plug for the country of
purchase. If a different type is necessary, refer to Figure 6 for the correct mains
line power plug types available from Fluke Calibration.

Universal EuroNorth American/Japan United Kingdom

LC-1

Australia/China

LC-6

LC-3

LC-4

South Africa Brazil

LC-7 LC-42

Type Fluke Calibration Part Number

North America LC-1

Universal Euro LC-3

United Kingdom LC-4

LC-5

Swiss

hhp004.eps

Switzerland LC-5

Australia LC-6

South Africa LC-7

Brazil LC-42

Figure 6. Available Mains Power Cord Types

15

6109A/7109A

Operators Manual

Attach Accessories

Fluid Overflow Accessory

Accessory attachment is explained in the subsequent sections.

Fluke Calibration recommends the fluid overflow accessory kit (model 7109-

2083) to avoid spills caused by thermal expansion of the fluid or an overfilled
tank.

To install the bath fluid overflow accessory, see Figure 7:

1. Remove the plug  from the overflow tube .

2. Place the overflow container onto the mounting bracket  and align it below
the overflow tube.

3. Place the cover (not shown) on the overflow container.

Figure 7. Fluid Overflow Accessory

1

2

3

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16

Portable Calibration Baths

Installation

Probe Clamp

Use the probe clamp accessory (Model 7109-2051, purchased separately) to
hold temperature probes in place while they are calibrated. The post of the probe
clamp screws into any of the four the M4 size threaded holes located near the
corners of the top panel. See Figure 8.

Figure 8. Probe Clamp Accessory

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17

6109A/7109A

Operators Manual

Adjustable Probe Fixture

Use the adjustable probe fixture (model 7109-2027) to hold up to four tri-clamp
temperature sensors. The device fits inside the tank opening and attaches to the
top panel of the Product with four thumb screws. The height of the platform can
be adjusted for proper immersion of the stems and flanges of the temperature
sensors. To adjust the height, slightly squeeze the tabs inward on the height
adjustment bracket  shown in Figure 9.

1

Figure 9. Adjustable Probe Fixture

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18

Portable Calibration Baths

Turn On the Product

Turn On the Product

Push the power switch on the back panel of the Product to the I side to turn on
the Product. The Product can take up to 40 seconds for the Product to become
fully operational.

Set the Language, Time, and Date

Set the display language, time, date, and other operator preferences in the Setup
Instrument screen. The UI is available in:

• English

• French

• German

• Portuguese

• Spanish

• Russian

• Simplified Chinese

• Japanese

• Korean

To change the language, time, or date:

1. Push .

2. Push .

3. Push  to move the focus to an item.

4. Push .

5. Push  to move the selection to the necessary value.

6. Push  to save the change.

7. Push the  (Done) to return to the first screen.

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6109A/7109A

Operators Manual

Set the Password

The Product ships from Fluke Calibration with minimal security settings. Except
for calibration parameters, any settings are easily changed.

To change the security level and set a new password to prevent unauthorized
use:

1. Push .

2. Push .

3. Push  (More).

4. Push  (Password).

5. Use the number keys to type in the factory password 1234.

6. Push  to access the Password screen.

7. Push  to edit the password.

8. Use the number keys to type in a new password.

9. Push  save the new password.

10. Push  to move to the Security setting.

11. Push  to change the security level.

12. Push  (Done) to return the first screen.

Note

Make sure to save the new password and do not lose it.

Connect the Reference Probe and Test Sensor

The 7109A-P and 6109A-P include the Input module to which a reference
thermometer and one DUT (Device Under Test) sensor can be connected.
Temperatures show on the display and are automatically recorded as a program
runs. This section explains how to set up these models to operate the sensor
inputs.

Connect the Reference Probe

A reference probe provides improved temperature accuracy and serves as a
reference standard to test other sensors. For best results, use a high-quality,
100 Ω, four-wire, platinum resistance thermometer (PRT) calibrated with low
uncertainty such as Fluke 5615-6. Table 4 shows how a reference probe can be
used to improve temperature accuracy.

Table 4. Typical Accuracy with a Fluke 5615 as a Reference Probe

Temperature Expanded Uncertainty (k = 2)

-25 °C 0.020 °C

20

0 °C 0.022 °C

140 °C 0.031 °C

250 °C 0.043 °C

Portable Calibration Baths

Connect the Reference Probe and Test Sensor

Use the provided clamp-on ferrites to reduce radio-frequency emissions and to
ensure electromagnetic compatibility with other equipment. Loop a section of
cable near the connector through the ferrite as shown in Figure 10. Fluke
Calibration also recommends a ferrite for the test sensor.

1

2

3

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Number Description

 Connector
 Clamp-on Ferrite
 Probe

Figure 10. Ferrite Installation

The reference probe plugs into the REF PRT input. It requires a 6-pin DIN
connector wired as shown in Figure 11.

1

2

3

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Number Description

 Probe Connector
 Shield
 PRT Sensor

Figure 11. Reference Probe Connections

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6109A/7109A

Operators Manual

Configure the Reference Probe Coefficients

Probe coefficients must be configured for the PRT temperature to be accurately
measured. If the reference probe has a properly-programmed INFO-CON
connector, probe coefficients are automatically configured when the probe is
connected to the Product. The connection icon shows at the top of the display to
show that the probe coefficients were successfully transferred from the
connector. To view the probe coefficients and verify that they are correct, go to
the Reference Probe menu:

1. Push .

2. Push  (Probe Function).

3. Push  (Reference Probe).

4. Push  or  to step through the list.

5. Push  (Done) to return the first screen.
If the reference probe does not have a programmed INFO-CON connector, enter

the probe coefficients manually. Get the values from the reference PRT’s report
of calibration. Push  (Test Calculation) to test the probe coefficients and
see that they produce correct temperatures.

When properly connected and configured, the temperature of the reference
probe shows on the display under Reference in Monitor mode.

Connect a Test RTD

The Input Module measures the resistance of a four-wire, three-wire, or two-wire
RTD. The RTD connects to the set of four banana terminals on the Input Module.
See Figure 12.

1 2 3

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Number Description





4-wire RTD
3-wire RTD
2-wire RTD

Figure 12. Test RTD Connections

22