Fluke 6050H User manual

6050H
Calibration Bath
User’s Guide
Rev. 7B2001
Hart Scientific

Limited Warranty & Limitation of Liability
Each product from Fluke Corporation, Hart Scientific Division ("Hart") is warranted to be free from de-
fects in material and workmanship under normal use and service. The warranty period is one year for the
Calibration Bath. The warranty period begins on the date of the shipment. Parts, product repairs, and ser-
vices are warranted for 90 days. The warranty extends only to the original buyer or end-user customer of
a Hart authorized reseller, and does not apply to fuses, disposable batteries or to any other product, which
in Hart's opinion, has been misused, altered, neglected, or damaged by accident or abnormal conditions
of operation or handling. Hart 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. Hart
does not warrant that software will be error free or operate without interruption. Hart does not warrant
calibrations on the Calibration Bath.
Hart 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 Hart. Warranty support is
available if product is purchased through a Hart authorized sales outlet or Buyer has paid the applicable
international price. Hart reserves the right to invoice Buyer for importation costs of repairs/replacement
parts when product purchased in one country is submitted for repair in another country.
Hart's warranty obligation is limited, at Hart's option, to refund of the purchase price, free of charge re-
pair, or replacement of a defective product which is returned to a Hart authorized service center within
the warranty period.
To obtain warranty service, contact your nearest Hart authorized service center or send the product, with
a description of the difficulty, postage, and insurance prepaid (FOB Destination), to the nearest Hart au-
thorized service center. Hart assumes no risk for damage in transit. Following warranty repair, the prod-
uct will be returned to Buyer, transportation prepaid (FOB Destination). If Hart determines that the
failure was caused by misuse, alteration, accident or abnormal condition or operation or handling, Hart
will provide an estimate or 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 IM-
PLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
HART SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL. OR CONSE-
QUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF DATA, WHETHER ARISING FROM
BREACH OF WARRANTY OR BASED ON CONTRACT, TORT, RELIANCE OR ANY OTHER
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 of com-
petent jurisdiction, such holding will not affect the validity or enforceability of any other provision.
Rev. 7B2001
Fluke Corporation, Hart Scientific Division
799 E. Utah Valley Drive • American Fork, UT 84003-9775 • USA
Phone: [phone] • Telefax: +1.801.763.1010
E-mail: [email protected]
www.hartscientific.com
Subject to change without notice. • Copyright © 2005 • Printed in USA

Table of Contents
1 Before You Start . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Symbols Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2.1 WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2.2 CAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3 Authorized Service Centers. . . . . . . . . . . . . . . . . . . . . . 6
2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Specifications and Environmental Conditions . . . . . . . . . 11
3.1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 Environmental Conditions. . . . . . . . . . . . . . . . . . . . . . 11
4 Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 Set Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.4 Setting the Temperature . . . . . . . . . . . . . . . . . . . . . . . 14
5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1 Bath Environment . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.2 “Dry-out” Period . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.3 Bath Preparation and Filling . . . . . . . . . . . . . . . . . . . . 18
5.4 Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.5 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.6 Tipping Prevention Brackets Installation . . . . . . . . . . . . . . 19
5.6.1 Installation On A Concrete Floor . . . . . . . . . . . . . . . . . . . . . . . . 19
5.6.1.1 Installation Of The Bath . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6 Bath Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.2 Comparison Calibration . . . . . . . . . . . . . . . . . . . . . . . 21
6.3 Calibration of Multiple Probes . . . . . . . . . . . . . . . . . . . 22
7 Parts and Controls . . . . . . . . . . . . . . . . . . . . . . . . 23
7.1 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
i

7.2 Bath Tank and Lid . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.3 Back Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
8 General Operation . . . . . . . . . . . . . . . . . . . . . . . . 27
8.1 Bath Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8.1.1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8.1.2 Heat Transfer Salt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8.2 Stirring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.3 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.4 Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8.5 Fluid Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8.6 Temperature Controller . . . . . . . . . . . . . . . . . . . . . . . 29
9 Controller Operation . . . . . . . . . . . . . . . . . . . . . . . 31
9.1 Bath Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 31
9.2 Reset Cutout . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
9.3 Temperature Set-point . . . . . . . . . . . . . . . . . . . . . . . . 33
9.3.1 Programmable Set-points . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
9.3.2 Set-point Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.3.3 Set-point Vernier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.4 Temperature Scale Units . . . . . . . . . . . . . . . . . . . . . . 35
9.5 Secondary Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . 36
9.6 Heater Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
9.7 Proportional Band . . . . . . . . . . . . . . . . . . . . . . . . . . 36
9.8 Cutout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
9.9 Controller Configuration . . . . . . . . . . . . . . . . . . . . . . 39
9.10 Probe Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . 39
9.10.1 R0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
9.10.2 ALPHA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
9.11 Operating Parameters . . . . . . . . . . . . . . . . . . . . . . . . 40
9.11.1 Cutout Reset Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
9.11.2 Stir Mode Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
9.11.3 Stir Set-point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
9.11.4 Heat Up Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
9.12 Serial Interface Parameters . . . . . . . . . . . . . . . . . . . . . 42
9.12.1 BAUD Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
9.12.2 Sample Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
9.12.3 Duplex Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
9.12.4 Linefeed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
9.13 IEEE-488 Parameters . . . . . . . . . . . . . . . . . . . . . . . . 44
9.13.1 IEEE-488 Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
9.14 Calibration Parameters . . . . . . . . . . . . . . . . . . . . . . . 45
ii

9.14.1 CTO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
9.14.2 CO and CG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
9.14.3 H and L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
10 Digital Communication Interface . . . . . . . . . . . . . . . . 47
10.1 Serial Communications . . . . . . . . . . . . . . . . . . . . . . . 47
10.1.1 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
10.1.2 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
10.1.2.1 Baud Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
10.1.2.2 Sample Period. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
10.1.2.3 Duplex Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
10.1.2.4 Linefeed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
10.1.3 Serial Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
10.2 IEEE-488 Communication (optional) . . . . . . . . . . . . . . . . 49
10.2.1 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
10.2.1.1 IEEE-488 Interface Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
10.2.2 IEEE-488 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
10.3 Interface Commands . . . . . . . . . . . . . . . . . . . . . . . . 49
10.4 Power Control Functions . . . . . . . . . . . . . . . . . . . . . . 53
11 Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . 55
11.1 Calibration Points . . . . . . . . . . . . . . . . . . . . . . . . . . 55
11.2 Measuring the Set-point Error. . . . . . . . . . . . . . . . . . . . 55
11.3 Computing R0 and ALPHA . . . . . . . . . . . . . . . . . . . . . 56
11.4 Calibration Example. . . . . . . . . . . . . . . . . . . . . . . . . 56
12 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
13 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . 61
13.1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . 61
13.2 Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
13.2.1 EMC Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
13.2.2 Low Voltage Directive (Safety) . . . . . . . . . . . . . . . . . . . . . . . . . 63
iii

iv
Figures
Figure 1 6050H Bath Cross Section (Optional Cart Shown) . . . . . . . . . . . . 9
Figure 2 Tipping Prevention Bracket Installation . . . . . . . . . . . . . . . . . 20
Figure 3 Front Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 4 Bath and Lid Components . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 5 Back Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 6 Controller Operation Flowchart . . . . . . . . . . . . . . . . . . . . . 32
Figure 7 Bath Temperature Fluctuations at Various Proportional Band Settings . 37
Figure 8 Serial Communications Cable Wiring . . . . . . . . . . . . . . . . . . 47
Figure 9 Calibration Example . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

v
Tables
Table 1 International Electrical Symbols . . . . . . . . . . . . . . . . . . . . . 1
Table 2 Interface Command Summary . . . . . . . . . . . . . . . . . . . . . . 51
Table 2 Interface Command Summary continued . . . . . . . . . . . . . . . . 52
Table 2 Interface Command Summary continued . . . . . . . . . . . . . . . . 53
Table 4 Power Control Commands . . . . . . . . . . . . . . . . . . . . . . . . 53

1 Before You Start
1.1 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.
Symbol Description
AC (Alternating Current)
AC-DC
Battery
CE Complies with European Union Directives
DC
Double Insulated
Electric Shock
Fuse
PE Ground
Hot Surface (Burn Hazard)
Read the User’s Manual (Important Information)
Off
On
1
1 Before You Start
Symbols Used
Table 1 International Electrical Symbols

Symbol Description
Canadian Standards Association
OVERVOLTAGE (Installation) CATEGORY II, Pollution Degree 2 per IEC1010-1 re-
fers to the level of Impulse Withstand Voltage protection provided. Equipment of
OVERVOLTAGE CATEGORY II is energy-consuming equipment to be supplied from
the fixed installation. Examples include household, office, and laboratory appliances.
C-TICK Australian EMC Mark
The European Waste Electrical and Electronic Equipment (WEEE) Directive
(2002/96/EC) mark.
1.2 Safety Information
DISCLAIMER: Hart Scientific manufactures baths for the purpose of
temperature calibration. Baths used for applications other than calibra-
tion are used at the discretion and sole responsibility of the customer. Hart
Scientific cannot accept any responsibility for the use of baths for any ap-
plication 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.
1.2.1 WARNINGS
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.
•Hart Scientific does not recommend that user’s drain the salt from the
bath. Hart Scientific provides the service of draining salt from the bath. If
draining the bath salt is necessary, contact an Authorized Service Center
(see Section 1.3) for an RMA and instructions on returning the bath. In-
sure that the control probe is removed from the bath before the salt solidi-
fies. If the control probe is not removed before shipping the bath, the
6050H Calibration Bath
User’s Guide
2

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.
•DO NOT overfill the bath. Overflowing extremely hot fluid may be harm-
ful to the operator. See Section 5.3, Bath Preparation and Filling, for spe-
cific 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-hu-
mid 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 re-
quirements 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 apply-
ing power such as storage in a low humidity temperature chamber operat-
ing at 50°C for 4 hours or more.
•DO NOT operate high temperature baths (500°C) near flammable materi-
als. Extreme temperatures could ignite the flammable material.
•Overhead clearance is required. Do not place the instrument under a cabi-
net 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 regula-
tions 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 explo-
sion 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.
•When immersing any object in the bath, ensure that you are not introduc-
ing anything into the bath that will react with the bath salt. Ensure that
probes are DRY and free of contaminants. Read the MSDS (Material
3
1 Before You Start
Safety Information

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 modi-
fied 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 ex-
tremely 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 Section 3.1, Specifications. 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.
•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 rat-
ing and type. If you have questions, contact an Authorized Service Center
(see Section 1.3).
•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.
6050H Calibration Bath
User’s Guide
4

•Keep all combustible materials away from the bath when using salt. Oper-
ate 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 ap-
plication. Failing to set the cutout to the limits of the bath fluid can result
in fire hazards and personal injury.
1.2.2 CAUTIONS
•Always operate this instrument at room temperatures listed in Section 3.2,
Environmental Conditions. Allow sufficient air circulation by leaving at
least 6 inches (15 cm) 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 Section 5.3, Bath Preparation and Filling, for
specific instructions.
•Read Section 6, Bath Use, before placing the unit into service.
•DO NOT change the values of the bath calibration constants from the fac-
tory 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 op-
timum 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 in-
struments 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 con-
tamination between bath fluids.
5
1 Before You Start
Safety Information

•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 per-
sonal injury to the calibration technician.
•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 ex-
tremely dangerous and could result in personal injury to the person mov-
ing the bath. If the bath is going to be placed in an area where it may need
to be moved frequently, Hart Scientific sells a special cart designed to ac-
commodate 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 sec-
ond 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 per-
sonnel and permanent damage to the bath could occur.
1.3 Authorized Service Centers
Please contact one of the following authorized Service Centers to coordinate
service on your Hart product:
Fluke Corporation, Hart Scientific Division
799 E. Utah Valley Drive
American Fork, UT 84003-9775
USA
Phone: [phone]
Telefax: +1.801.763.1010
E-mail: [email protected]
Fluke Nederland B.V.
Customer Support Services
6050H Calibration Bath
User’s Guide
6

Science Park Eindhoven 5108
5692 EC Son
NETHERLANDS
Phone: [phone]
Telefax: [phone]
E-mail: [email protected]
Fluke Int'l Corporation
Service Center - Instrimpex
Room 2301 Sciteck Tower
22 Jianguomenwai Dajie
Chao Yang District
Beijing 100004, PRC
CHINA
Phone: [phone]
Telefax: [phone]
E-mail: [email protected]
Fluke South East Asia Pte Ltd.
Fluke ASEAN Regional Office
Service Center
60 Alexandra Terrace #03-16
The Comtech (Lobby D)
118502
SINGAPORE
Phone: [phone]
Telefax: [phone]
E-mail: [email protected]
When contacting these Service Centers for support, please have the following
information available:
•Model Number
•Serial Number
•Voltage
•Complete description of the problem
7
1 Before You Start
Authorized Service Centers

2 Introduction
The Hart Scientific 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.
9
2 Introduction
Figure 1 6050H Bath Cross Section (Optional Cart Shown)

3 Specifications and Environmental
Conditions
3.1 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 set-
ting 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
3.2 Environmental Conditions
Although the instrument has been designed for optimum durability and trou-
ble-free operation, it must be handled with care. The instrument should not be
operated in an excessively dusty or dirty environment. Maintenance and clean-
ing 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, de-
creasing linearly to 50% at 40°C
11
3 Specifications and Environmental Conditions
Specifications

•mains voltage within ± 10% of nominal
•vibrations in the calibration environment should be minimized
•altitude less than 2,000 meters
•indoor use only
6050H Calibration Bath
User’s Guide
12

4 Quick Start
CAUTION: READ SECTION 6 ENTITLED BATH USE 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 Section 5
through 8 carefully before operating the bath.
4.1 Unpacking
Unpack the bath carefully and inspect it for any damage that may have oc-
curred 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 an Authorized Service Center.
4.2 Set Up
Set up of the bath requires careful unpacking and placement of the bath, filling
the bath with salt, installing the probe and connecting power. Consult Section 5
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 Section 8.1.2, Heat Transfer Salt.) Refer to
sections6through7formoreinformationonbathsetupanduse.
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.
4.3 Power
Plug the bath power cord into a mains outlet of the proper voltage, frequency,
and current capability. See Section 3.1, Specifications on page 11, for power
13
4 Quick Start
Unpacking

details. Additionally, a separate ground connection is provided and required to
permanently connect the instrument to earth ground for added operator safety.
4.4 Setting the Temperature
In the following discussion and throughout this manual a button icon around
the word SET, UP, EXIT or DOWN indicates the panel button while the dotted
box indicates the display reading (see Figure 3 on page 23). 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.
24.68 C Bath temperature display
When “SET” is pressed the display will show the set-point memory that is cur-
rently being used and its value. Eight set-point memories are available.
SAccess set-point selection
1. 25.0 Set-point 1, 25.0°C currently used
Press “SET” to select this memory and access the set-point value.
SAccess set-point value
C 25.00 Current value of set-point 1, 25.00°C
Press “UP” or “DOWN” to change the set-point value.
UIncrement display
C 70.00 New set-point value
Press SET to accept the new value and display the vernier value. The bath be-
gins heating or cooling to the new set-point.
SStore new set-point, access vernier
0.00000 Current vernier value
Press “EXIT” and the bath temperature will be displayed again.
6050H Calibration Bath
User’s Guide
14

EReturn to the temperature display
24.73 C Bath temperature display
The bath will heat or cool 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 and control at higher 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 for
added safety. See Section 9.8.
To obtain optimum control stability adjust the proportional band as discussed in
Section 9.7.
15
4 Quick Start
Setting the Temperature