Fluke 6050H User manual

PN 3729208
March 2016
© 2016 Fluke Corporation. All rights reserved. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.
6050H
Calibration Bath
User's Guide

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

i
Table of Contents
Title Page
Before You Start.................................................................................... 1
Symbols Used ................................................................................... 1
Safety Information.............................................................................. 2
Cautions ............................................................................................ 6
How to Contact Fluke Calibration.......................................................... 7
Product Introduction .............................................................................. 8
Specifications and Environmental Conditions ....................................... 9
Specifications .................................................................................... 9
Environmental Conditions.................................................................. 10
Quick Start............................................................................................. 10
Unpacking.......................................................................................... 10
Set Up................................................................................................ 11
Power ................................................................................................ 11
Set the Temperature.......................................................................... 11
Installation ............................................................................................. 13
Bath Environment.............................................................................. 13
“Dry-out” Period................................................................................. 14
Bath Preparation and Filling .............................................................. 14
Probe................................................................................................. 14
Power ................................................................................................ 15
Tipping Prevention Brackets Installation ........................................... 15
Installation on a Concrete Floor..................................................... 15
Bath Use................................................................................................ 16
General.............................................................................................. 17
Comparison Calibration..................................................................... 17
Calibration of Multiple Probes............................................................ 18
Parts and Controls................................................................................. 18
Front Panel........................................................................................ 18
Bath Tank and Lid ............................................................................. 20
Back Panel ........................................................................................ 22
General Operation................................................................................. 24
Bath Fluid .......................................................................................... 24
Safety ............................................................................................ 24
Heat Transfer Salt ......................................................................... 24
Stirring ............................................................................................... 25
Power ................................................................................................ 25
Heater................................................................................................ 26
Fluid Drain ......................................................................................... 26

6050H
User's Guide
ii
Temperature Controller ..................................................................... 26
Controller Operation.............................................................................. 27
Bath Temperature.............................................................................. 27
Reset Cutout...................................................................................... 27
Temperature Set-point....................................................................... 29
Programmable Set-points.............................................................. 29
Set-point Value.............................................................................. 30
Set-point Vernier............................................................................ 30
Temperature Scale Units................................................................... 31
Secondary Menu ............................................................................... 32
Heater Power..................................................................................... 32
Proportional Band.............................................................................. 33
Cutout................................................................................................ 35
Controller Configuration..................................................................... 36
Probe Parameters.............................................................................. 36
R0.................................................................................................. 36
ALPHA........................................................................................... 36
Operating Parameters ....................................................................... 36
Cutout Reset Mode........................................................................ 37
Stir Mode Select ............................................................................ 37
Stir Set-point.................................................................................. 38
Heat Up Power .............................................................................. 38
Serial Interface Parameters............................................................... 39
BAUD Rate.................................................................................... 39
Sample Period............................................................................... 40
Duplex Mode ................................................................................. 40
Linefeed......................................................................................... 41
IEEE-488 Parameters........................................................................ 41
IEEE-488 Address......................................................................... 41
Calibration Parameters...................................................................... 42
CTO............................................................................................... 42
CO and CG.................................................................................... 42
H and L.......................................................................................... 43
Digital Communication Interface............................................................ 44
Serial Communications...................................................................... 44
Wiring ............................................................................................ 44
Setup ............................................................................................. 45
Serial Operation............................................................................. 46
IEEE-488 Communication (optional) ................................................. 46
Setup ............................................................................................. 46
IEEE-488 Operation ...................................................................... 46
Interface Commands ......................................................................... 47
Power Control Functions ................................................................... 50
Calibration Procedure............................................................................ 51
Calibration Points .............................................................................. 51
Measuring the Set-point Error ........................................................... 51
Computing R0 and ALPHA................................................................ 52
Calibration Example .......................................................................... 52
Maintenance.......................................................................................... 54
Troubleshooting..................................................................................... 55
Troubleshooting Table....................................................................... 55
Comments ......................................................................................... 59
EMC Directive................................................................................ 59
Low Voltage Directive (Safety)....................................................... 59

iii
List of Tables
Table Title Page
1. Symbols..................................................................................................... 1
2. Interface Command Summary .................................................................. 47
3. Power Control Commands ........................................................................ 50

6050H
User's Guide
iv

v
List of Figures
Figure Title Page
1. 6050H Bath Cross Section (Optional Cart Shown) ................................... 8
2. Tipping Prevention Bracket Installation..................................................... 16
3. Front Panel................................................................................................ 18
4. Bath and Lid Components......................................................................... 20
5. Back Panel Features................................................................................. 23
6. Controller Operation Flow Chart................................................................ 28
7. Bath Temperature Fluctuation at Various Proportional Band Settings...... 33
8. Serial Communication Cable Wiring.......................................................... 44
9. Calibration Example .................................................................................. 53

6050H
User's Guide
vi

1
Before You Start
Symbols Used
Table 1 lists the International Electrical Symbols. Some or all of these symbols
may be used on the instrument or in this manual.
Table 1. Symbols
Symbol Description
XWARNING. HAZARDOUS VOLTAGE. Risk of electric shock.
WWARNING - RISK OF DANGER. Consult user documentation.
AC (Alternating Current)
AC-DC
DC
TDouble Insulated
.PE Ground
 Battery
Hot suface
O Off
I On
)Certified by CSA Group to North American safety standards.
Measurement Category II is applicable to test and measuring circuits connected directly
to utilization points (socket outlets and similar points) of the low-voltage MAINS
installation.

6050H
User's Guide
2
PConforms to European Union directives.
Conforms to relevant Australian EMC standards.
Fuse
~
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.
Safety Information
DISCLAIMER: Fluke Calibration manufactures baths for the purpose of
temperature calibration. Baths used for applications other than calibration are
used at the discretion and sole responsibility of the customer. Hart Scientific
cannot accept any responsibility for the use of baths for any application other
than temperature calibration.
Use this instrument only as specified in this manual. Otherwise, the protection
provided by the instrument may be impaired.
The following definitions apply to the terms “Warning” and “Caution”.
“WARNING” identifies conditions and actions that may pose hazards to the user.
“CAUTION” identifies conditions and actions that may damage the in- strument
being used.
WWARNING
To avoid personal injury, follow these guidelines.
GENERAL
•Appropriate personal safety protection should be worn by
the operator at all times while using the bath.
•Fluke Calibration does not recommend that user’s drain the
salt from the bath. Fluke Calibration provides the service of
draining salt from the bath. If draining the bath salt is
necessary, contact an Authorized Service Center (see the
How to Contact Fluke Calibration section) for an RMA and
instructions on returning the bath. Insure that the control
probe is removed from the bath before the salt solidifies. If
the control probe is not removed before shipping the bath,
the control probe may be damaged during shipping and the
Service Centers assume no liability for damage incurred
during shipping.
•DO NOT use the instrument for any application other than
calibration work. The instrument was designed for
temperature calibration. Any other use of the unit may cause
unknown hazards to the user.
•DO NOT use the unit in environments other than those listed
in the user’s guide.

Calibration Bath
Before You Start
3
•DO NOT overfill the bath. Overflowing extremely hot fluid
may be harmful to the operator. See the Bath Preparation
and Filling section for specific instructions.
•Follow all safety guidelines listed in the user’s manual.
•Calibration Equipment should only be used by Trained
Personnel.
•If this equipment is used in a manner not specified by the
manufacturer, the protection provided by the equipment
may be impaired.
•Before initial use, or after transport, or after storage in
humid or semi-humid environments, or anytime the
instrument has not been energized for more than 10 days,
the instrument needs to be energized for a “dry-out” period
of 2 hours before it can be assumed to meet all of the safety
requirements of the IEC 1010-1. If the product is wet or has
been in a wet environment, take necessary measures to
remove moisture prior to applying power such as storage in
a low humidity temperature chamber operating at 50 °C for
4 hours or more.
•DO NOT operate high temperature baths (500 °C) near
flammable materials. Extreme temperatures could ignite the
flammable material.
•Overhead clearance is required. Do not place the instrument
under a cabinet or other structure. Always leave enough
clearance to allow for safe and easy insertion and removal
of probes.
•The instrument is intended for indoor use only.
•Ensure that you check the appropriate OSHA and local fire
code regulations for proper equipment required to suppress
a fire for the Salt utilized in the bath.
BURN HAZARD
•High temperatures may be present in this equipment. Fires
and severe burns may result if personnel fail to observe
safety precautions.
•Ensure the bath DOES NOT contain any water and has been
completely dried prior to filling with salt. Any trapped water
can cause a steam explosion resulting in personal injury. If
the bath has recently been filled with water, ensure the
inside of the drain tube is dry prior to filling the bath with
salt.

6050H
User's Guide
4
•When immersing any object in the bath, ensure that you are
not introducing anything into the bath that will react with the
bath salt. Ensure that probes are DRY and free of
contaminants. Read the MSDS (Material Safety Data Sheet)
for the salt used. If you are still unsure if the material you
are going to introduce into the bath will react with the salt,
refer to the individual MSDS sheets for the three
components that make up the salt.
•The bath is provided with an access cover. The access
cover can be modified to allow the probes being calibrated
to be inserted through the access cover. The bath should be
operated with the access cover on at all times. Operating the
bath without the access cover reduces stability, increases
out gassing of fluids, and increases the possibility of
personal injury or fire hazard.
•When removing probes from the bath DO NOT wipe probes
down with a paper towel. If the bath setpoint is high, the salt
can cause the paper towel to ignite in your hand. Provide a
safe surface and situation for the probes to cool prior to
cleaning the salt from the probes.
•The bath generates extreme temperatures. Precautions must
be taken to prevent personal injury or damage to objects.
Probes may be extremely hot when removed from the bath.
Cautiously handle probes to prevent personal injury.
Carefully place probes on a heat resistant surface or rack
until they are at room temperature.
•Be extremely careful when filling the bath with salt and
bringing it up to temperature. Salt expands with
temperature. It is easy to add salt, but extremely dangerous
to remove hot molten salt because the bath is over filled. DO
NOT fill the bath above the indicated fill line when the
stirring is on. It will overflow.
ELECTRICAL HAZARD
•These guidelines must be followed to ensure that the safety
mechanisms in this instrument will operate properly. This
instrument must be plugged into an outlet as listed in the
Specifications section. The power cord of the instrument is
equipped with a three-pronged grounding plug for your
protection against electrical shock hazards. It must be
plugged directly into a properly grounded three-prong
receptacle. The receptacle must be installed in accordance
with local codes and ordinances. Additionally, the
instrument has a Permanent Earth Ground that must be
connected during use. Consult a qualified electrician. DO
NOT use an extension cord or adapter plug.

Calibration Bath
Before You Start
5
•DO use a 30 mA ground fault interrupt device. This unit
contains a liquid. A ground fault device is advised in case
liquid is present in the electrical system and could cause an
electrical shock.
•Always replace the power cord with an approved cord of the
correct rating and type. If you have questions, contact an
Authorized Service Center (see the How to Contact Fluke
Calibration section).
•High voltage is used in the operation of this equipment.
Severe injury or death may result if personnel fail to observe
the safety precautions. Before working inside the
equipment, turn off the power and disconnect the power
cord.
•Keep all combustible materials away from the bath when
using salt. Operate the bath on a heatproof surface such as
concrete. Provide a means of safety for containing any spill,
which may occur.
BATH SALT
•Salt used in this unit may produce noxious or toxic fumes
under certain circumstances. Consult the fluid
manufacturer’s MSDS (Material Safety Data Sheet). Proper
ventilation and safety precautions must be observed.
•The unit is equipped with a soft cutout (user settable
firmware) and a hard cutout (set at the factory). Check the
flash point, boiling point, or other fluid characteristic
applicable to the circumstances of the unit operation.
Ensure that the soft cutout is adjusted to the fluid
characteristics of the application. Failing to set the cutout to
the limits of the bath fluid can result in fire hazards and
personal injury.

6050H
User's Guide
6
Cautions
WCaution
•Always operate the instrument in room temperatures listed in
the Environmental Conditions section. Allow sufficient air
circulation by leaving at least 15 cm (6 inches) of clearance
around the instrument.
•DO NOT overfill the bath. Overflowing liquid may damage the
electrical system. Be sure to allow for thermal expansion of
the fluid as the bath temperature increases. See the Bath
Preparation and Filling section, for specific instructions.
•Read the Bath Use section, before placing the bath into
service.
•DO NOT change the values of the bath calibration constants
from the factory set values. The correct setting of these
parameters is important to the safety and proper operation of
the unit.
•Only authorized personnel should perform the Factory Reset
Sequence if no other action is successful in correcting a
malfunction. You must have a copy of the most recent Report
of Test to restore the test parameters.
•DO NOT operate this instrument in an excessively wet, oily,
dusty, or dirty environment.
•The bath is a precision instrument. Although it has been
designed for optimum durability and trouble free operation, it
must be handled with care. Position the bath before the tank is
filled with salt.
•Most probes have handle temperature limits. Be sure that the
probe handle temperature limit is not exceeded in the air
above the instrument.
•The instrument and any thermometer probes used with it are
sensitive instruments that can be easily damaged. Always
handle these devices with care. Do not allow them to be
dropped, struck, stressed, or overheated.
•DO ensure the salt is cleaned from the probes prior to
immersing the probe in the next bath. Clean your probe
between each bath to avoid contamination between bath
fluids.
•Under filling the bath may reduce the bath performance and
may possibly damage the bath.
•When calibrating PRTs always follow correct calibration
procedure and calibrate from high temperatures to low
temperatures with the appropriate triple point of water checks.
Never immerse a wet or cold PRT into a bath filled with hot
fluid. Severe damage to the PRT may result as well as personal
injury to the calibration technician.

Calibration Bath
How to Contact Fluke Calibration
7
•This bath is not designed to be portable. Therefore, moving
the bath once it has been installed should be kept to a
minimum. NEVER MOVE A BATH THAT IS FULL OF “HOT”
FLUID. This action could be extremely dangerous and could
result in personal injury to the person moving the bath. If the
bath is going to be placed in an area where it may need to be
moved frequently, Fluke Calibration sells a special cart
designed to accommodate the bath. However, even with a cart
the bath should not be moved full of “hot”fluid. The fluid can
splash causing injury or if the bath and cart tip, the “hot”fluid
could cause damage to the surrounding area and personnel.
•If the bath must be moved, allow the salt to solidify and cool.
Care must be used when moving the bath with the fluid
solidified in the bath. The control probe can easily be
damaged. Two people are required to safely move the bath.
One person should lift the bath by the tower, while the second
person lifts from underneath the bath tank.
•The control probe must be inserted through the lid into the
bath fluid and plugged into the socket at the back of the bath.
DO NOT operate the bath without the control probe properly
inserted and attached. The bath will not operate correctly
without the control probe. Injury to operating personnel and
permanent damage to the bath could occur.
How to 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]

6050H
User's Guide
8
To see product information and download the latest manual supplements, visit Fluke
Calibration’s website at www.flukecal.com.
To register your product, visit http://flukecal.com/register-product.
When contacting Fluke Calibration, please have the following information:
•Model Number
•Serial Number
•Voltage
•Complete description of the problem
Product Introduction
The Fluke Calibration 6050H is a constant temperature bath intended mainly for
the application of temperature calibration. However, its high stability and the
availability of factory modifications make it suitable for other uses as well.
.
6050 cross section.eps
Figure 1. 6050H Bath Cross Section (Optional Cart Shown)

Calibration Bath
Specifications and Environmental Conditions
9
Specifications and Environmental Conditions
Specifications
6050H
Range 180 °C to 550 °C †
Stability
±0.002 °C at 200 °C (salt)
±0.004 °C at 300 °C (salt)
±0.008 °C at 550 °C (salt)
Uniformity ±0.005 °C at 200 °C (salt)
±0.020 °C at 550 °C (salt)
Temperature Setting Digital display with push-button data entry
Set-Point Resolution 0.01 °C; high-resolution mode, 0.00018 °C
Display Temperature Resolution 0.01 °C
Digital Setting Accuracy ±1 °C
Digital Setting Repeatability ±0.02 °C
Heaters 400/1200/2000 Watts
Access Opening 5" x 10" (127 x 254 mm)
Depth 12" (305 mm)
Wetted Parts 304 stainless steel
Power 230 VAC (±10 %), 50/60 Hz, 10 A, 2200 W
Volume 7.1 gallons (27 liters), requires 112 lb. of bath salt
Weight 180 lb. (82 kg)
Size 28.5" H x 20.4" W x 24.5" D
(724 x 518 x 622 mm)
Automation Package
Interface-it software and RS-232 computer
interface are available for setting bath
temperature via remote computer. For IEEE-488,
add the
2001-IEEE to the automation package.
Safety OVERVOLTAGE (Installation) CATEGORY II,
Pollution Degree 2 per IEC61010-1

6050H
User's Guide
10
Environmental Conditions
Although the instrument has been designed for optimum durability and trouble-
free operation, it must be handled with care. The instrument should not be
operated in an excessively dusty or dirty environment. Maintenance and cleaning
recommendations can be found in the Maintenance Section of this manual.
The instrument operates safely under the following conditions:
•ambient temperature range: 5 50 °C (41 122 °F)
•ambient relative humidity: maximum 80% for temperature <31 °C, decreasing
linearly to 50 % at 40 °C
•mains voltage within ±10 % of nominal
•vibrations in the calibration environment should be minimized
•altitude less than 2,000 meters
•indoor use only
Quick Start
WCaution
READ the Bath Use section before placing the bath in service.
Incorrect handling can damage the bath and void the warranty.
This section gives a brief summary of the steps required to set up and operate
the 6050H bath. This should be used as a general overview and reference and
not as a substitute for the remainder of the manual. Please read Installation
through General Operation carefully before operating the bath.
Unpacking
Unpack the bath carefully and inspect it for any damage that may have occurred
during shipment. If there is shipping damage, notify the carrier immediately.
Verify that all components are present:
•Bath
•Access Hole Cover
•Controller Probe
•Manual
•Report of Test
If you are missing any item, please contact Fluke Calibration.

Calibration Bath
Quick Start
11
Set Up
Set up of the bath requires careful unpacking and placement of the bath, filling
the bath with fluid, installing the probe and connecting power. Consult the
Installation section for detailed instructions for proper installation of the bath. Be
sure to place the bath in a safe, clean and level location. Remember that the bath
operates at very high temperatures.
Fill the bath tank with salt. (See the Heat Transfer Salt section.) Refer to sections
Bath Use through Parts and Controls for more information on bath setup and
use.
The control probe must be inserted through the lid into the bath and plugged into
the socket at the back of the bath. DO NOT operate the bath without the control
probe properly installed.
Power Plug the bath power cord into a mains outlet of the proper voltage, frequency,
and current capability. See the Specifications section for power details.
Additionally, a separate ground connection is provided and required to
permanently connect the instrument to earth ground for added operator safety.
Set the Temperature
In the following discussion a solid box around the word SET, UP, EXIT or DOWN
indicates the panel button while the dotted box indicates the display reading.
Explanation of the button or display reading are to the right of each button or
display value.
To view or set the bath temperature set-point proceed as follows. The front panel
LED display normally shows the actual bath temperature.
Bath temperature display
When “SET” is pressed the display shows the set-point memory that is currently
being used and its value. Eight set-point memories are available.
Access set-point selection
Set-point 1, 25.0 °C currently used
 
  

6050H
User's Guide
12
 
Press “SET” to select this memory and access the set-point value.
Access set-point value
Current value of set-point 1, 25.00 °C
Press “UP” or “DOWN” to change the set-point value.
Increment display
New set-point value
Press “SET” to accept the new value and display the vernier value. The bath
begins heating or cooling to the new set-point.
Storenewset-point,accessvernier
Current vernier value
Press “EXIT” and the bath temperature will be displayed again.
Returntothetemperaturedisplay
Bath temperature display
The bath heats or cools until it reaches the new set-point temperature. Set the
heater switch to position “MED” or “HIGH” to allow the bath to more quickly reach
a higher temperature. The higher heater settings may be necessary to reach
higher temperatures and control at high temperatures.
When setting the set-point temperature be careful not to exceed the temperature
limit of the bath fluid. The over-temperature cutout should be correctly set to
prevent this from happening. See the Cutout section.
If operating the bath below 45 °C set the COOLING power switch to ON. The
cooling temperature may require adjustment to provide the proper amount of
cooling. See the Cooling section.
To obtain optimum control stability adjust the proportional band as discussed in
the Proportional Band section.
 
 
 