Fluke 6055 User manual

6055
Calibration Bath
User’s Guide
October 2013
© 2013 Fluke Corporation. All rights reserved. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.
Via Acquanera, 29 22100 Como
tel. 031.526.566 (r.a.) fax 031.507.984
[e-mail] www.calpower.it

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 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 Comments concerning the use of salt . . . . . . . . . . . . . . . . 14
4.3 Bath environment . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.4 “Dry-out” period . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.5 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.6 Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.7 Setting the temperature . . . . . . . . . . . . . . . . . . . . . . . 15
5 Bath Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.2 Comparison calibration . . . . . . . . . . . . . . . . . . . . . . . 17
5.3 Calibration of multiple probes. . . . . . . . . . . . . . . . . . . . 18
6 Parts and controls . . . . . . . . . . . . . . . . . . . . . . . . 19
6.1 Controller panel . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.2 Power panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.3 Back panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7 General operation . . . . . . . . . . . . . . . . . . . . . . . . 23
7.1 Two modes of temperature control . . . . . . . . . . . . . . . . . 23
7.1.1 Temperature control mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.1.2 Temperature drift mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
i

7.2 Bath fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.3 Fluid system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.4 Fluid Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.5 Filling the bath . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.5.1 Using heat transfer salt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.5.1.1 The first salt load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.5.1.2 Melting the salt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.6 Stirring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.7 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8 Controller operation . . . . . . . . . . . . . . . . . . . . . . . 29
8.1 Bath temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8.2 Reset cut-out. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8.3 Temperature set-point . . . . . . . . . . . . . . . . . . . . . . . . 31
8.3.1 Programmable set-points . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.3.2 Set-point value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8.3.3 Set-point vernier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8.4 Temperature scale units . . . . . . . . . . . . . . . . . . . . . . . 33
8.5 Secondary menu . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.6 Heater power . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.7 Proportional band . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.8 Cut-out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.9 Controller configuration. . . . . . . . . . . . . . . . . . . . . . . 37
8.10 Probe parameters . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.10.1 R0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.10.2 ALPHA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.11 Operating parameters . . . . . . . . . . . . . . . . . . . . . . . . 38
8.11.1 Cut-out reset mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.11.2 Stir mode select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.11.3 Stir set-point. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8.11.4 Heat up power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8.12 Serial interface parameters . . . . . . . . . . . . . . . . . . . . . 40
8.12.1 Baud rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.12.2 Sample period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
8.12.3 Duplex mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
8.12.4 Linefeed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
8.13 IEEE-488 parameters . . . . . . . . . . . . . . . . . . . . . . . . 42
8.13.1 IEEE-488 address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
8.14 Calibration parameters . . . . . . . . . . . . . . . . . . . . . . . 42
8.14.1 CTO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
8.14.2 CO and CG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
8.14.3 H and L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
ii

9 Digital communication interface . . . . . . . . . . . . . . . . 45
9.1 Serial communications . . . . . . . . . . . . . . . . . . . . . . . 45
9.1.1 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
9.1.2 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
9.1.2.1 Baud rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
9.1.2.2 Sample period. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
9.1.2.3 Duplex mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
9.1.2.4 Linefeed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
9.1.3 Serial operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
9.2 IEEE-488 communication (optional) . . . . . . . . . . . . . . . . 47
9.2.1 Setup and address selection . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
9.2.2 IEEE-488 operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
9.3 Interface commands . . . . . . . . . . . . . . . . . . . . . . . . . 47
9.4 Power commands . . . . . . . . . . . . . . . . . . . . . . . . . . 51
9.5 Heater settings for control . . . . . . . . . . . . . . . . . . . . . . 52
10 Calibration procedure . . . . . . . . . . . . . . . . . . . . . . 53
10.1 Calibration points . . . . . . . . . . . . . . . . . . . . . . . . . . 53
10.2 Measuring the set-point error . . . . . . . . . . . . . . . . . . . . 53
10.3 Computing R0 and ALPHA . . . . . . . . . . . . . . . . . . . . . 53
10.4 Calibration example . . . . . . . . . . . . . . . . . . . . . . . . . 54
11 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
12 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . 59
12.1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . 59
12.2 Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
12.2.1 EMC Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
12.2.2 Low Voltage Directive (Safety) . . . . . . . . . . . . . . . . . . . . . . . . . 61
iii

iv
Figures and Tables
Figure 1 Controller panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 2 Power panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 3 Back panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 4 System diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 5 System diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 6 Controller operation flowchart . . . . . . . . . . . . . . . . . . . . . . 30
Figure 7 Bath temperature fluctuations at various proportional band settings . . 35
Figure 8 Serial Cable Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . 45
Table 1 Interface command summary . . . . . . . . . . . . . . . . . . . . . . 48
Table 1 Interface command summary cont. . . . . . . . . . . . . . . . . . . . 49
Table 1 Interface command summary cont. . . . . . . . . . . . . . . . . . . . 50
Table 2 Power Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Figure 9 Calibration example . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

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-TIC Australian EMC Mark
1.2 Safety information
DISCLAIMER: Fluke Corporation, Hart Scientific Division manufac-
tures baths for the purpose of temperature calibration. Baths used for ap-
plications other than calibration are used at the discretion and sole
responsibility of the customer. Hart Scientific cannot accept any responsi-
bility for the use of baths for any application other than temperature cali-
bration.
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 instru-
ment 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. Solidification in the bath can take up to several days. 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.
6055 Calibration Bath
User’s Guide
2

•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 7.5, Filling the bath, for specific instruc-
tions.
•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
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
3
1 Before you start
Safety information

the individual MSDS sheets for the three components that make up the
salt.
•The bath is provided with an access cover. The cover should remain on
the bath whenever possible. Operating the bath without the access cover
reduces stability, increases out gassing of fluids, and increases the possi-
bility 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 stated in the specifications of this guide. 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 di-
rectly into a properly grounded three-prong receptacle. The receptacle
must be installed in accordance with local codes and ordinances. Consult
a qualified electrician. DO NOT use an extension cord or adapter plug.
•DO use a 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.
•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.
6055 Calibration Bath
User’s Guide
4

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 temperature between 41°F and
104°F (5°C to 40°C). 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 7.5, Filling the bath, for specific in-
structions.
•Read Section 5, 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.
•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
5
1 Before you start
Safety information

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. The fluid can splash causing injury or if the bath tips, 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. Four people are required to safely
move the bath.
•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, 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
Science Park Eindhoven 5108
5692 EC Son
NETHERLANDS
Phone: [phone]
Telefax: [phone]
E-mail: [email protected]
6055 Calibration Bath
User’s Guide
6

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 6055 Calibration Bath is a highly stable constant temperature salt bath. It
has been designed for calibrating liquid-in-glass thermometers or other types of
long thermometers against a known temperature standard such as a Standard
Platinum Resistance Thermometer (SPRT).
The 6055 calibration bath provides the following features:
•A deep fluid tank (test well is 3.88 inches in diameter and has 17 inches
of fluid depth).
•A highly temperature stable low gradient environment typically a nominal
stability of ±0.005°C with salt. The fluid is well stirred and environmen-
tally protected to minimize gradients.
•The fluid level is near the top of the test well to facilitate calibration of
liquid-in-glass thermometers without needing to compensate for stem ef-
fect.
•The bath provides two calibration modes; temperature control mode and
temperature drift mode. The temperature control mode uses a hybrid digi-
tal and analog PI controller with lock in amplifier design. The temperature
and other functions are selected with the four button keypad to a hun-
dredth of a degree and finer with a digital vernier adjustment. The Drift
mode bypasses the controller with heater power manually controlled by
the variable transformer.
9
2 Introduction

3 Specifications and environmental
conditions
3.1 Specifications
Range 200 °C to 550 °C (392 °F to 1022 °F)
Stability ± 0.003 °C at 200 °C (salt)
± 0.010 °C at 550 °C (salt)
Uniformity ± 0.005 °C at 200 °C (salt)
± 0.010 °C at 550 °C (salt)
Temperature Setting Digital display with push-button entry
Set-Point Resolution 0.01 °C, high resolution 0.00018 °C
Display Temperature
Resolution
0.01 °C
Digital Setting Accuracy ±1°C
Digital Setting Repeatability ±0.01°C
Heaters 260 to 2080 W
Working Area 107 mm diameter (4.2 in), 432 mm deep (17 in), removable SST lid,
special viewing channel for LIG sighting
Wetted Parts 304 stainless steel
Power 230 V ac (± 10 %), 50/60 Hz, 15 A
Volume 19.8 liters, 43 kg of bath salt (5.2 gal, 95 lb)
Size 57.2 cm D x 77.5 cm W x 152.4 cm H (22.5 x 30.5 x 60 in)
Weight 70.8 kg (156 lb)
Distance from Line of Sight to
Top of Fluid
15.9 mm (5/8 in)
Safety OVERVOLTAGE (Installation) CATEGORY II, Pollution Degree 2
per IEC1010-1
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
•pressure: 75kPa–106kPa
11
3 Specifications and environmental conditions
Specifications

•mains voltage within ±10% of nominal
•vibrations in the calibration environment should be minimized
•altitude less than 2000 meters
6055 Calibration Bath
User’s Guide
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4 Installation
CAUTION: READ SECTION 5 ENTITLED BATH USE before placing the
bath in service. Incorrect handling can damage the bath and void the war-
ranty.
This section provides the steps required to set up and operate the 6055 bath.
This section should be used as a general overview and reference and not as a
substitute for the remainder of the manual. Please read Sections5 through7
carefully before operating the bath.
WARNING: Never move a bath that is full of “hot” fluid. This action is
extremely dangerous and can result in personal injury and possible dam-
age to the surrounding area.
The bath comes on a cart. This cart is for ease of operation, but in no way im-
plies that the bath is portable. This bath is extremely dangerous when filled
with salt. Follow the safety guidelines set forth in the Before you start section.
The bath should never be picked up with liquid salt in the tank. If the bath
needs to be picked up, allow the salt to solidify and cool. Four people are
needed to safely lift the bath. Lift the bath where the bath and the cart meet.
CAUTION: Use caution as this bath is top heavy.
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 the following components are present:
•6055 Bath
•Control Probe
•Power Cord
•Immersion Heater
•Report of Test
•Carousel (optional)
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4 Installation
Unpacking

4.2 Comments concerning the use of salt
CAUTION: Do not use the control heaters to melt granular salt when fill-
ing the bath. The control heaters can be damaged if used in such a man-
ner. Use the immersion heater (with a power of about 1000 watts) to melt
the salt. Do not turn the POWER on until the tank is 3/4 full of melted salt.
4.3 Bath environment
The Model 6055 bath is a precision instrument that must be located in an ap-
propriate environment. The location should be free from drafts, extreme tem-
peratures, extreme temperature changes, and dirt. Use the levelers to ensure that
the bath is level. Allow free air space around the bath to allow surface heat to
convect away freely. A fume hood should be used for ventilation of fumes.
Because the bath is designed for operation at high temperatures, keep all flam-
mable and meltable materials away from the bath. Although the bath is well in-
sulated, top surfaces do become hot. Beware of the danger of accidental fluid
spills.
If used at high temperatures, a fume hood should be used to remove any vapors
given off by hot bath fluid.
4.4 “Dry-out” period
The melting period for salt serves as a “dry-out” period for the heaters of this
bath. During this time period all of the safety requirements of the IEC 1010-1
CAN NOT beassumedtobemet.
4.5 Power
Plug the bath power cord into a mains outlet of the proper voltage, frequency,
and current capability as stated in the Specifications. Set the “HEATER” switch
on the front panel to position “LOW” and turn the bath on using the front panel
“POWER” switch. The bath turns on and begins to heat or cool to reach the
previously programmed temperature set-point. The front panel LED display in-
dicates the actual bath temperature.
4.6 Setup
The probe used with the Model 6055 is a precision PRT sensor. The probe
should not be bent or damaged in any way. Plug the probe into the probe con-
nector on the rear panel of the bath.
Plug the stirrer into the receptacle marked “STIRRER POWER” located on the
rear panel of the bath. This receptacle is switched on with the instruments con-
trol after the instrument reaches 200°C.
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User’s Guide
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4.7 Setting the temperature
In the following discussion and throughout this manual 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.
100.00 C Bath temperature display
When “SET” is pressed the display shows the set-point memory that is cur-
rently being used and its value. Eight set-point memories are available.
SAccess set-point selection
1. 150.0 Set-point 1, 150.0 °C currently used
Press “SET” to select this memory and access the set-point value.
SAccess set-point value
C 150.00 Current value of set-point 1, 150.00°C
Press “UP” or “DOWN” to change the set-point value.
UIncrement display
C 160.00 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.
EReturn to the temperature display
100.00 C Bath temperature display
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4 Installation
Setting the temperature

The bath heats or cools until it reaches the new set-point temperature. Set the
heater switch to position “HIGH” to allow the bath to more quickly reach a
higher temperature. The “HIGH” setting may be necessary to reach higher tem-
peratures and control at high temperatures.
When setting the set-point temperature be careful not to exceed the temperature
limit or the bath fluid. The over-temperature cut-out should be correctly set to
prevent this from happening. See Section 8.8.
To obtain optimum control stability adjust the proportional band as discussed in
Section 8.7.
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User’s Guide
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