Fluke 7012 User manual

7012
Calibration Bath
User Manual
Rev. 992802
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. 992802
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 © 2006 • 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3 Authorized Service Centers. . . . . . . . . . . . . . . . . . . . . . 5
2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Specifications and Environmental Conditions . . . . . . . . . 11
3.1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 Environmental Conditions. . . . . . . . . . . . . . . . . . . . . . 12
4 Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 Set Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.4 Setting the Temperature . . . . . . . . . . . . . . . . . . . . . . . 14
5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1 Bath Environment . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.2 “Dry-out” Period . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.3 Bath Preparation and Filling . . . . . . . . . . . . . . . . . . . . 17
5.4 Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.5 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6 Bath Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.2 Comparison Calibration . . . . . . . . . . . . . . . . . . . . . . . 19
6.3 Calibration of Multiple Probes . . . . . . . . . . . . . . . . . . . 20
7 Parts and Controls . . . . . . . . . . . . . . . . . . . . . . . . 21
7.1 Front Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.2 Side Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.3 Back Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.4 Bath Tank and Lid . . . . . . . . . . . . . . . . . . . . . . . . . . 24
i

8 General Operation . . . . . . . . . . . . . . . . . . . . . . . . 27
8.1 Heat Transfer Fluid . . . . . . . . . . . . . . . . . . . . . . . . . 27
8.1.1 Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8.1.2 Viscosity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8.1.3 Specific Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.1.4 Thermal Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.1.5 Thermal Expansion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.1.6 Electrical Resistivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.1.7 Fluid Lifetime . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.1.8 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.1.9 Cost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8.1.10 Commonly Used Fluids. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8.1.10.1 Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8.1.10.2 Ethylene Glycol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8.1.10.3 Methanol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8.1.10.4 Mineral Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8.1.10.5 Silicone Oils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8.1.11 Fluid Characteristics Charts. . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8.1.11.1 Limitations and Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8.1.11.2 About the Graph . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
8.2 Stirring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.3 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.4 Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.5 Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.6 Fluid Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.7 Temperature Controller . . . . . . . . . . . . . . . . . . . . . . . 34
9 Controller Operation . . . . . . . . . . . . . . . . . . . . . . . 37
9.1 Bath Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 37
9.2 Reset Cutout . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
9.3 Temperature Set-point . . . . . . . . . . . . . . . . . . . . . . . . 39
9.3.1 Programmable Set-points . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
9.3.2 Set-point Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
9.3.3 Set-point Vernier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
9.4 Temperature Scale Units . . . . . . . . . . . . . . . . . . . . . . 41
9.5 Secondary Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . 42
9.6 Heater Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
9.7 Proportional Band . . . . . . . . . . . . . . . . . . . . . . . . . . 42
9.8 Cutout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
9.9 Controller Configuration . . . . . . . . . . . . . . . . . . . . . . 45
9.10 Probe Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . 46
9.10.1 D0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
9.10.2 Dg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
9.11 Operating Parameters . . . . . . . . . . . . . . . . . . . . . . . . 46
9.11.1 Cutout Reset Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
ii

9.12 Serial Interface Parameters . . . . . . . . . . . . . . . . . . . . . 47
9.12.1 Baud Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
9.12.2 Sample Period. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
9.12.3 Duplex Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
9.12.4 Linefeed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
9.13 IEEE-488 Parameters . . . . . . . . . . . . . . . . . . . . . . . . 49
9.13.1 IEEE-488 Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
9.14 Calibration Parameters . . . . . . . . . . . . . . . . . . . . . . . 49
9.14.1 CTO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
9.14.2 H and L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
10 Digital Communication Interface . . . . . . . . . . . . . . . . 51
10.1 Serial Communications . . . . . . . . . . . . . . . . . . . . . . . 51
10.1.1 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
10.1.2 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
10.1.2.1 Baud rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
10.1.2.2 Sample Period. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
10.1.2.3 Duplex Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
10.1.2.4 Linefeed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
10.1.3 Serial Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
10.2 IEEE-488 Communication . . . . . . . . . . . . . . . . . . . . . 53
10.2.1 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
10.2.1.1 IEEE-488 Interface Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
10.2.2 IEEE-488 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
10.3 Interface Commands . . . . . . . . . . . . . . . . . . . . . . . . 53
10.4 Power Control Functions . . . . . . . . . . . . . . . . . . . . . . 56
10.4.1 Heater Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
10.4.2 Cooling Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
11 Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . 59
11.1 Calibration Points . . . . . . . . . . . . . . . . . . . . . . . . . . 59
11.2 Measuring the Set-point Error. . . . . . . . . . . . . . . . . . . . 59
11.3 Computing D0 and DG . . . . . . . . . . . . . . . . . . . . . . . 60
11.4 Calibration Example. . . . . . . . . . . . . . . . . . . . . . . . . 60
12 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
12.1 Draining the Bath . . . . . . . . . . . . . . . . . . . . . . . . . . 64
13 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . 67
13.1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
13.2 Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
13.2.1 EMC Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
13.2.2 Low Voltage Directive (Safety) . . . . . . . . . . . . . . . . . . . . . . . . . 70
iii

iv
Figures and Tables
Figure 1 Bath Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 2 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 3 Refrigeration Controls - Side Panel . . . . . . . . . . . . . . . . . . . 22
Figure 4 Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 5 Drain Location and Lid Options . . . . . . . . . . . . . . . . . . . . . 25
Figure 6 Chart of various bath fluids and their properties . . . . . . . . . . . . . 31
Table 2 Table of various bath fluids and their properties . . . . . . . . . . . . . 32
Figure 7 Controller Operation Flowchart . . . . . . . . . . . . . . . . . . . . . 38
Table 3 Proportional Band — Fluid Table . . . . . . . . . . . . . . . . . . . . 43
Figure 8 Bath temperature fluctuation at various proportional band settings . . . 43
Figure 9 Serial Communications Cable Wiring . . . . . . . . . . . . . . . . . . 51
Table 4 Interface Command Summary.. . . . . . . . . . . . . . . . . . . . . . 54
Table 4 Digital Communications Commands continued . . . . . . . . . . . . . 55
Table 5 Serial Power Control Functions . . . . . . . . . . . . . . . . . . . . . 57
Table 6 Temperature Range Control Functions. . . . . . . . . . . . . . . . . . 57
Figure 10 Sample calibration computations . . . . . . . . . . . . . . . . . . . . 61

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
The European Waste Electrical and Electronic Equipment (WEEE) Directive
(2002/96/EC) mark.
1.2 Safety Information
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 possible electric shock or personal injury, follow these guidelines.
GENERAL
•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 cold or hot fluid may
be harmful to the operator. See Section 5.3, Bath Preparation and Filling,
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-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"
7012 Calibration Bath
User’s Guide
2

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 degree centigrade 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.
BURN HAZARD
•Extremely cold temperatures may be present in this equipment. Freezer
burns and frostbite may result if personnel fail to observe safety precau-
tions.
•High temperatures may be present in this equipment. Fires and severe
burns may result if personnel fail to observe safety precautions.
ELECTRICAL HAZARD
•These guidelines must be followed to ensure that the safety mechanisms
in this instrument will operate properly. This mains supply for the instru-
ment must be capable of supplying power to the instrument 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. 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.
BATH FLUIDS
•Fluids 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.
3
1 Before You Start
Safety Information

•The instrument 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 opera-
tion. Ensure that the soft cutout is adjusted to the fluid characteristics of
the application. As a guideline, the soft cutout should be set 10°C to 15°C
below the flash point of the bath fluid. See Section 8.1, Heat Transfer
Fluid, for specific information on bath fluids and Section 9.8, Cutout.
1.2.2 CAUTIONS
To avoid possible damage to the instrument, follow these guidelines.
•Always operate the instrument in room temperatures listed in Section 3.2,
Environmental Conditions. 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 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.
•The refrigeration may be damaged or the lifetime shortened if the
set-point temperature is set above 60°C for more than one hour with the
refrigeration manually on. Ensure that the refrigeration is off when the
unit is used above 60°C.
•The Factory Reset Sequence should be performed only by authorized
personnel 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 pa-
rameters.
•DO NOT operate this instrument in an excessively wet, oily, dusty, or
dirty environment.
•The unit is a precision instrument. Although it has been designed for opti-
mum durability and trouble free operation, it must be handled with care.
Position the unit before the tank is filled with fluid. Use the handles pro-
vided to move the unit. Due to the weight of the compressor, it may re-
quire two people to safely move the bath. If two people are used, place
one person in the front and one person in the back of the unit, carefully
slide hands under the unit and lift in unison. The area containing the com-
pressor will be heavier than the rest of the unit. Do not move a unit filled
with fluid.
•Most probes have handle temperature limits. Be sure that the probe handle
temperature limit is not exceeded in the air above the instrument.
7012 Calibration Bath
User’s Guide
4

•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.
COLD BATHS
•Refrigerated baths require that the condensing coil be cleaned periodi-
cally. Accumulation of dust and dirt on the condenser will result in pre-
mature failure of the compressor.
•This bath has been equipped with a brownout and over voltage protection
device as a safety feature to protect the system components.
•Mode of Operation: This bath needs to be plugged into the line voltage
for at least two minutes before operation. This is only necessary for the
first time that the bath is energized or when it is moved from one location
to another. Turning the bath ON or OFF does not trigger the delay.
•If a High/Low voltage condition exists for longer than 5 seconds, the
bath will be de-energized. The “Mains Out of Range” light on the back of
the bath will be lit indicating a fault condition. Re-energization is auto-
matic upon correction of the fault condition and after a delay cycle of
about two minutes. If a fault condition exists upon application of power,
the bath will not energize.
Under and Over Voltage Protection at 115 VAC
Voltage Cutout: ±12.5 % (101 - 129 VAC)
Voltage Cut In: ±7.5 % (106 - 124 VAC)
Under and Over Voltage Protection at 230 VAC
Voltage Cutout: ±12.5 % (203 - 257 VAC)
Voltage Cut In: ±7.5 % (213 - 247 VAC)
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]
5
1 Before You Start
Authorized Service Centers

Fluke Nederland B.V.
Customer Support Services
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
7012 Calibration Bath
User’s Guide
6

•Voltage
•Complete description of the problem
7
1 Before You Start
Authorized Service Centers

2 Introduction
The Hart Scientific 7012 bath is a very precise constant temperature bath. An
innovative state of the art solid-state temperature controller has been incorpo-
rated which maintains the bath temperature with extreme stability. The control-
ler uses a microcontroller to execute the many operating functions.
User interface is provided by the 8-digit LED display and four key-switches.
Digital remote communications is optionally available with a RS-232 or
IEEE-488 interface.
The tank for the 7012 is stainless steel and holds 36 liters. There are two lids
available; the standard lid with a rectangular access hole and an optional lid
with a recirculating pump (see Figure 5).
9
2 Introduction
Figure 1 Bath Assembly

3 Specifications and Environmental
Conditions
3.1 Specifications
Range –10°C to 110°C (14°F to 230°F)
Stability ±0.0008°C at 0°C (ethanol)
±0.0008°C at 25°C (water)
±0.003°C at 100°C (oil 5012)
Uniformity ±0.003°C at 0°C (ethanol)
±0.002°C at 25°C (water)
±0.004°C at 100°C (oil 5012)
Temperature
Setting
Digital display with push-button data entry
Set-point
Resolution
0.002°C; high-resolution mode, 0.00003°C
Display
Resolution
0.01°C
Digital Setting
Accuracy
±1°C
Digital Setting
Repeatability
±0.005°C
Heaters 500 and 1000 Watts
Safety Cutout Factory-set high temperature
Temperature
Drift per ±°C
Ambient or ±10
VAC line
±0.2m°C
Pump
Recirculation
(optional)
15 L/min
Access Opening 162 mm X 292 mm (6.38” X 11.5”)
Depth 457 mm (18”)
Wetted Parts 304 stainless steel
Volume 42 liters (11.2 gallons)
Weight 68 kg (150 lb.)
Size 762 mm H X 686 mm W X 401 mm D
(30” X 27” X 15.8”)
Power 115 VAC (±10%), 60 Hz, 1570 W
230 VAC (±10%), 60 Hz, 1570 W (50 Hz Optional)
NOTE: If voltage is outside ±10% VAC, the compressor may be damaged.
Check the back panel label for the correct voltage and frequency prior to energiz-
ing the instrument.
System Fuse 115 VAC: 15 A 250 V slow blow
230 VAC: 8 A 250 V slow blow
11
3 Specifications and Environmental Conditions
Specifications

Heater Fuse 115 VAC: 10 A 250 V fast blow
230 VAC: 6 A 250 V fast blow
Safety OVERVOLTAGE (Installation) CATEGORY II, Pollution Degree 2 per IEC 61010-1
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
•mains voltage within ±10% of nominal
•vibrations in the calibration environment should be minimized
•altitude does not effect the performance or safety of the unit
•indoor use only
7012 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 7012 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 7
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:
•7012 Bath
•Controller Probe
•Access Hole Cover
•User’s Guide
•Report of TEst
•Fill Hole Cover
•Drain Elbow
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 fluid, 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.
Fill the bath tank with an appropriate liquid. For operation at moderate bath
temperatures, clean distilled water works well. Carefully pour the fluid into the
bath tank through the large rectangular access hole above the tank avoiding
spilling any fluid. The fluid must not exceed a height of 1/2 inch below the bath
lid.
The control probe must be inserted through the lid into the bath and plugged
into the socket at the back of the bath.
13
4 Quick Start
Unpacking

4.3 Power
Plug the bath power cord into a mains outlet of the proper voltage, frequency,
and current capability. Refer to Section 3.1, Specifications, for power require-
ment details. Refer to and read the WARNING at the front of this manual con-
cerning brownout and over voltage protection.
Set the “HEATER” switch on the front panel to position “LOW” and turn the
bath on using the front panel “POWER” switch. The bath will turn on and be-
gin to heat or cool to reach the previously programmed temperature set-point.
The front panel LED display will indicate the actual bath temperature.
4.4 Setting 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.
24.68 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. 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 30.00 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.
7012 Calibration Bath
User’s Guide
14

SStore new set-point, access vernier
0.00000 Current vernier value
Press “EXIT” and the bath temperature is displayed again.
EReturn to the temperature display
24.73 C Bath temperature display
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 of the bath fluid. The over-temperature cut-out should be correctly set to
prevent this from happening. See Section 9.8.
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 Section 8.5.
To obtain optimum control stability adjust the proportional band as discussed in
Section 9.7.
15
4 Quick Start
Setting the Temperature

5 Installation
CAUTION: READ SECTION 6 ENTITLED “BATH USE ”before placing
the bath in service. Incorrect handling can damage the bath and void the
warranty.
This bath is not designed to be portable. Therefore, moving the bath once it has
been installed should be kept to a minimum.
CAUTION: Never move a bath that is full of 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 will need to be moved fre-
quently, a special cart can be designed to accommodate the bath making the
bath much more portable. Hart sells carts designed for these baths. However,
even with a cart the bath should not be moved full of fluid. The fluid can splash
causing injury or if the bath and cart tip, the fluid could cause damage to the
surrounding area and personal injury to personnel.
If the bath must be moved, be sure to drain the fluid to prevent any injury. The
side of the bath with the compressor is heavier than the tank side. To safely
move the bath, two people are required.
5.1 Bath Environment
The Model 7012 Bath is a precision instrument which should be located in an
appropriate environment. The location should be free of drafts, extreme temper-
atures and temperature changes, dirt, etc. The surface where the bath is placed
must be level.
If used at higher temperatures where fluid vaporization is significant, a fume
hood should be used.
5.2 “Dry-out” Period
Before initial use, after transport, and any time the instrument has not been en-
ergized for more than 10 days, the bath will need to be energized for a
“dry-out” period of 1-2 hours before it can be assumed to meet all of the safety
requirements of the IEC 1010-1.
5.3 Bath Preparation and Filling
The 7012 Bath is not provided with a fluid. Various fluids are available from
Hart Scientific and other sources. Depending on the desired temperature range,
any of the following fluids, as well as others, may be used in the bath:
17
5 Installation
Bath Environment