Parr Instrument 6755 User Manual
6755
Solution Calorimeter
Operating Instruction Manual
For models produced after November 2010
593M
Table of Contents
Preface
Scope — 1
Related Instructions — 1
Customer Service — 1
Explanation of Symbols — 2
Safety Information — 3
Intended Usage — 3
General Specifi cations — 3
Environmental Conditions — 3
Provisions for Lifting and Carrying — 3
Cleaning & Maintenance — 3
Specifi cations — 3
Chapter 1
Installation
Power Connection — 4
Motor Installation — 4
Thermistor Probe Installation — 4
Chapter 2
Quick Start — 6
Chapter 3
Operation
Menu System — 8
Menu Keys — 8
Control Keys — 8
Programming — 8
Default Settings — 9
Performing an Analysis — 9
Sample Size — 10
Filling the Dewar — 10
Loading a Solid Sample — 10
Loading a Liquid Sample — 10
Installing the Loaded Cover Assembly — 10
Combining the Reactants — 10
Emptying the Calorimeter — 11
Manual Test Sequencing— 11
Automatic Test Sequencing— 11
Chapter 4
Menu Descriptions
Main Menu — 12
Calorimeter Operation Menu — 12
Operating Controls Menu — 14
Program Information and Control Menu — 14
Data Entry Controls Menu — 16
Reporting Controls Menu — 16
Communication Controls Menu — 17
File Management Menu — 19
Diagnostics Menu — 20
Chapter 5
Calculations
Standardization — 22
Calculating the Energy Change — 23
Reading the Thermogram — 23
Chapter 6
Reports — 26
Chapter 7
Memory Management — 27
Chapter 8
Accessory Connections
Communication Connection — 28
Printer Connections — 28
Balance Connections — 28
Mettler 011/012 Interface — 28
Sartorious Interface — 28
Generic Interface — 28
Bar Code Port — 29
Computer Connections — 29
Remote Operation (Optional) — 37
Samba Server Feature (Optional) — 37
Feature Keys — 37
Chapter 9
Maintenance
Fuses — 38
Conversion from 6755 to 6725 — 38
Chapter 10
Troubleshooting
Error List — 39
Chapter 11
Technical Service
Return for Repair — 40
Chapter 12
Parts Lists
Parts for the 6755 Solution Calorimeter — 41
Principal Assemblies in 6772 Thermometer — 41
Chapter 13
Drawings
External Parts View of 6755 Solution Calorimeter — 42
Internal Parts View of 6755 Solution Calorimeter — 43
6772 Schematic — 44
Internal View of 6772 Calorimetric Thermometer — 45
Back Panel of 6772 Calorimetric Thermometer — 47
Chapter 14
Default Settings — 48
6755
PREFACE
Scope
This manual contains instructions for installing and
operating the Parr 6755 Solution Calorimeter. For
ease of use, the manual is divided into 14 chapters.
Installation
Quick Start
Operation
Menu Descriptions
Calculations
Reports
Memory Management
Accessory Connections
Maintenance
Troubleshooting
Technical Service
Parts Lists
Drawings
Default Settings
Preface
Related Instructions
Additional instructions concerning the installation and operation of various component parts and
peripheral items used with the 6755 Solution Calorimeter should be made a part of these instructions.
Additional instructions for the optional printer are
found in the respective printer package and should
be made a part of this book.
No. Description
201M Limited Warranty
230M Safety in the Operation of Laboratory
and Pressure Vessels
This manual contains detailed instructions related to
solution calorimetry, standardization of the calorimeter, and calculation of energy change.
Note: The unit of heat used in this manual is
the thermochemical calorie, which is equal to
4.1840 absolute joules.
Subsections of these chapters are identifi ed in the
Table of Contents.
To assure successful installation and operation, the
user must study all instructions carefully before
starting to use the Solution Calorimeter to obtain an
understanding of the capabilities of the equipment
and the safety precautions to be observed in the
operation.
Customer Service
Questions concerning the installation or operation of this instrument
can be answered by the Parr Customer Service Department:
1-309-762-7716 • 1-800-872-7720 • Fax: 1-309-762-9453
E-mail: parr@parrinst.com • http://www.parrinst.com
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1
Preface
Explanation of Symbols
I On Position
O Off Position
~ Alternating Current
This CAUTION symbol may be present on the Product Instrumentation
and literature. If present on the product, the user must consult the appropriate part of the accompanying product literature for more information.
ATTENTION, Electrostatic Discharge (ESD) hazards. Observe precautions for handling electrostatic sensitive devices.
Protective Earth (PE) terminal. Provided for connection of the protective earth (green or green/yellow) supply system conductor.
Chassis Ground. Identifi es a connection to the chassis or frame of the
equipment shall be bonded to Protective Earth at the source of supply
in accordance with national and local electrical code requirements.
Earth Ground. Functional earth connection. This connection shall be
bonded to Protective earth at the source of supply in accordance with
national and local electrical code requirements.
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Parr Instrument Company
6755
Preface
Safety Information
To avoid electrical shock, always:
1. Use a properly grounded electrical outlet of
correct voltage and current handling capability.
2. Ensure that the equipment is connected to
electrical service according to local national
electrical codes. Failure to properly connect may
create a fi re or shock hazard.
3. For continued protection against possible
hazard, replace fuses with same type and rating
of fuse.
4. Disconnect from the power supply before
maintenance or servicing.
To avoid personal injury:
1. Do not use in the presence of fl ammable or
combustible materials; fi re or explosion may
result. This device contains components which
may ignite such material.
2. Refer servicing to qualifi ed personnel.
Intended Usage
If the instrument is used in a manner not specifi ed
by Parr Instrument Company, the protection provided by the equipment may be impaired.
General Specifi cations
Electrical Ratings
115VAC, 1.0 Amp, 50/60 Hz
230VAC, 1.0 Amp, 50/60 Hz
Before connecting the calorimeter to an electrical
outlet the user must be certain that the electrical
outlet has an earth ground connection and that the
line, load and other characteristics of the installation
do not exceed the following limits:
Voltage: Fluctuations in the line voltage should not
exceed 10% of the rated nominal voltage shown on
the data plate.
Frequency: Calorimeters can be operated from either a 50 or 60 Hertz power supply without affecting
their operation or calibration.
Environmental Conditions
This apparatus is to be used indoors.
Operating: 15 °C to 30 °C; maximum relative humidity of 80% non-condensing. Installation Category II
(overvoltage) in accordance with IEC 664.
Pollution degree 2 in accordance with IEC 664.
Altitude Limit: 2,000 meters.
Storage: -25 °C and 65 °C; 10% to 85% relative hu-
midity.
Provisions for Lifting and Carrying
Before moving the instrument, disconnect all connections from the rear of the apparatus. Lift the
instrument by grabbing underneath each corner.
Cleaning & Maintenance
Periodic cleaning may be performed on the exterior
surfaces of the instrument with a lightly dampened
cloth containing a mild soap solution. All power
should be disconnected when cleaning the instrument. There are no user serviceable parts inside the
product other than what is specifi cally called out
and discussed in this manual. Advanced troubleshooting instructions beyond the scope of this
manual can be obtained by calling Parr Instrument
Company in order to determine which part(s) may
be replaced or serviced.
Specifi cations
Probe type Thermistor
Thermometer range 10-50 °C
Resolution 0.0001 °C
Absolute accuracy
without calibration
with calibration
Repeatability,
single point +/- 0.002 °C
Linearity, 10 °C span +/- 0.002 °C
Communications port Ethernet
Data logging capacity 1MB (~10000 points)
+/- 0.100 °C
+/- 0.0500 °C
Current: The total current drawn should not exceed
the rating shown on the data plate on the calorimeter by more than 10 percent.
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1
Installation
CHAPTER 1
Installation
The 6755 Solution Calorimeter requires approximately 4 square feet of work space on a
sturdy bench/table in a location free from room drafts or radiant heat sources, (preferably
in an air conditioned room providing minimal temperature change), and an electrical outlet.
Other necessary accessories include:
• Chemical balance sensitive to 0.1 mg
• Top loading balance capable of weighing up to 1.5 kg with a sensitivity of 0.1g
Unpack the calorimeter carefully and check the individual parts against the packing list. If
shipping damage is discovered, report it immediately to the delivery carrier. Handle the
glass cell, Dewar fl ask and the thermistor probe with care as these parts are fragile and
easily broken.
Set the calorimeter on a bench or table in a location that is free from drafts and protected
from sources of radiant heat. Temperature changes in the room should be minimal.
Power Connection
Plug the power line into any grounded outlet providing proper voltage that matches the
specifi cation on the nameplate of the Calorimetric Thermometer. The calorimeter will
draw approximately 100 watts of power. Grounding is very important not only as a safety
measure, but also to ensure satisfactory controller performance. If there is any question
about the reliability of the ground connection through the power cord, run a separate earth
ground wire to the controller chassis.
Turn the power switch to the on position. After a short time, the Parr logo will appear on
the LCD display followed by a running description of the instrument boot sequence. When
the boot sequence is complete, the 6772 Calorimetric Thermometer Main Menu is displayed.
Motor Installation
Remove the 493E plug with 3280HC retainer on the motor output. Attach the motor cord to
the rear of the calorimeter case using the mounting screws provided for safety purposes.
Set the cover with its attached stirring shaft onto the stainless steel air can; drop the geared
drive belt over the motor and stirrer pulleys. The drive system should run freely. Although
the belt may appear to be unusually loose, it is intended to operate under light tension to
minimize friction in the stirrer bearing. The gearing on the belt and pulleys will prevent
slippage.
Thermistor Probe Installation
Connections for two thermistor probes are located on the back of the 6772 Calorimetric
Thermometer. If only one probe is to be used, connect it to the “bucket” connection. If the
second probe is used, it should be inserted in the hole on the left, rear of the instrument.
Install the thermistor in the cover opening and press the bushing fi rmly into place to anchor the probe in its proper position. Place the cover on the calorimeter with the orienting
pin in the alignment hole.
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Parr Instrument Company
6755
2X SA1332RP06
6-32 X 3/8 RHMS PHILLIPS
2X SA1140RP04
4-40 X 1/4 RHMS PHILLIPS
Figure 1
327C2
BACK PANEL (REF)
SA1332RP06
6-32 X 3/8 RHMS PHILLIPS
(SEE NOTE)
with 3280HC Retainer
installed to insulate
from live circuits when
no motor is attached.
Installation
493E Plug
1
95F
DATA LABEL
NOTE: CONNECT UNTERMINATED 493E WITH 328HC BRACKET TO THE MOTOR
OUTPUT RECEPTACLE SECURING IT USING THE SA1332RP06 FASTENER.
6772 Calorimetric Thermometer Back Panel
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2
Quick Start
CHAPTER 2
Quick Start
Before starting to use the calorimeter for the fi rst time, it is recommended that the user perform a dry run with the calorimeter completely assembled, but with no liquid in the Dewar and
no sample in the rotating cell. This will give the user an opportunity to become familiar with
the individual parts of the calorimeter and the manner in which they must be handled. The
calorimeter must be standardized prior to analyzing a sample.
See Chapter 3: Operation for more detail.
1. Allow at least 20 minutes for the calorimeter to warm up.
2. Turn on the stirrer motor switch on the 6755 calorimeter.
3. Prepare and weigh the sample to 0.0001g or 1 mL in the PTFE dish.
4. Fill the Dewar volumetrically or by weight.
5. Install the thermistor probe in the cover opening and press the bushing fi rmly into place to
anchor the probe in its proper position.
6. Lower the cover assembly with the cell and thermistor probe into the Dewar and set the
cover in place on the air can, then drop the drive belt over the pulleys, start the motor and
press the start key.
7. The pre-period will now start. When the reactants come to thermal equilibrium, the thermometer will beep. Initiate the reaction by pressing downward on the push rod to drop the
sample out of the rotating cell.
8. During the reaction period, the enthalpy change will occur.
9. The calorimeter will again come to equilibrium during the post period and at the conclusion
of the test, the calorimeter will signal the user and produce a report.
10. Stop the calorimeter motor, raise the cover carefully and wipe any excess liquid from the
parts that were immersed in the Dewar. Remove the thermistor probe from the cover and
remove the sample dish from the end of the push rod; then remove the rod and release the
glass cell from the drive shaft.
11. Lift the Dewar out of the air can and empty it. Wash and dry all wetted parts carefully.
12. At the end of the testing period, press the
menu. Turn OFF the thermometer at the power switch when prompted.
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Parr Instrument Company
key on the thermometer touch screen main
6755
Notes
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3
Operation
CHAPTER 3
Operation
Menu System
All confi gurations and operations are handled by a
menu-driven system operated from the bright touch
screen display. The settings and controls are organized into eight main sections as displayed on the
MAIN MENU.
4. Data Displays. Most of these keys display values
that have been calculated by the Calorimetric
Thermometer and are informational only. Certain ones can be overridden by the user entering
a desired value through a sub-menu. The value
is displayed in the lower right corner of the key.
Note: Some keys will respond with an opportunity for the user to confi rm the specifi ed action
to minimize accidental disruptions to the program
and/or stored data.
Control Keys
There are fi ve control keys which always appear
in the right column of the primary displays. These
keys are unavailable when they are gray instead of
white.
1. Escape. This key is used to go up one level in
the menu structure.
2. Main Menu. This key is used to return to the
main menu touch screen from anywhere in the
menu structure.
Note: Keys with a “double box” in the upper
left hand corner lead to sub-menus.
Menu Keys
The controls that change the data fi eld information
in the menus will be one of the following:
1. Toggles. These data fi elds contain ON/OFF or
YES/NO choices. Simply touching the key on the
screen toggles the choice to the other option.
The current setting is displayed in the lower
right corner of the key.
2. Option Selection. These data fi elds contain a list
of options. Touching the key on the screen steps
the user through the available choices. The current setting is displayed in the lower right corner
of the key.
3. Value Entry Fields. These data fi elds are used
to enter data into the Calorimetric Thermometer. Touching the key on the screen brings up a
sub-menu with a key pad or similar screen for
entering the required value. Some keys lead to
multiple choices. Always clear the current value
before entering a new value. Once entered the
screen will return to the previous menu and the
new value will be displayed in the lower right
corner of the key.
3. Start. This key is used to start a Calorimetric
Thermometer test.
4. Report. This key is used to access the test re-
sults stored in the Calorimetric Thermometer, to
enter thermochemical corrections, and to initiate a report on the display, printer or attached
computer.
5. Help. This key is used to access help screens
related to the menu currently displayed on the
touch screen.
6.
This key appears in the Escape key location
when the main menu is displayed. This key is
used to shut down the calorimeter program before turning off the power.
Programming
The program in the 6772 Calorimetric Thermometer can be extensively modifi ed to tailor the unit
to a wide variety of operating conditions, reporting
units, laboratory techniques, available accessories
and communication modes. In addition, the calculations, thermochemical corrections and reporting
modes can be modifi ed to conform to a number of
standard test methods and procedures. Numerous
provisions are included to permit the use of other
reagent concentrations, techniques, combustion
aids and short cuts appropriate for the user’s work.
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Operation
3
Note: Changes to the program are made by use
of the menu structure. Any of these items can
be individually entered at any time to revise the
operating program.
Default Settings
The 6772 Calorimetric Thermometer is preprogrammed with default settings for use with the 1341
Plain Jacket Calorimeter. On the operating controls
page of the 6772 Thermometer is the Method of Operation key. This key toggles the thermometer between
solution and combustion calorimetry. Make sure that
the calorimeter is set to solution calorimetry. This
will force the calorimeter to restart and bring up the
appropriate set of menus and eliminate all of the keys
dedicated to combustion calorimetry.
The default values of the 6772 are designed to operate with the 1341 Plain Jacket calorimeter. Therefore,
the following parameters must be changed in the
Calorimetry Parameters menu found in the Diagnostics Menu.
Correction (K) Parameters:
K1 0.5
K2 0.00080
K3 1.0
K4 0.0
K5 0.0
Blackout (B) Parameters:
Misfi re Blackout (B2) 72
Derivative Blackout (B3) 0.5
Dynamic Blackout (B4) 6
Equilibrium Blackout (B5) 18
Dynamic Derivative Blackout (B6) 0.02
Dynamic Time Blackout (B7) 20
Note: To perform an endothermic run, set the
Tolerance Parameter (L2) to -1.
See Chapter 14: Default Settings for a listing of the
factory default settings. A more in-depth explanation
of these parameters is found on the corresponding
parameter group help pages. These default settings
remain in effect until changed by the user. Should
the user ever wish to return to the factory default settings, go to the Program Info and Control Menu, User/
Factory Settings, touch Reload Factory Default Settings and YES. Non-volatile memory is provided to
retain any and all operator initiated program changes;
even if power is interrupted or the unit is turned off.
If the unit experiences an intentional or unintentional
“Cold Restart”, the controller will return to the last
known settings.
The default parameters of the 6772 Calorimetric
Thermometer can be changed to guarantee that the
thermometer, when cold restarted, will always be in
the desired confi guration before beginning a series
of tests. Users who wish to permanently revise their
default settings may do so using the following procedure:
• Establish the operating parameters to be stored
as the user default settings.
• Go to the Program Info and Control Menu, User/
Factory Settings, User Setup ID, and enter the
desired User Setup ID.
• Select Save User Default Settings
• To re-load the user default setting, go to the
Program Info and Control Page, User/Factory
Settings, Re-load User Default Settings, and YES.
Performing an Analysis
Tests can be run in a strictly manual fashion or automatically where the thermometer sequences the
calorimeter through the pre and post periods. The
manual sequencing approach is useful for applications where raw data is logged and subsequently
analyzed, off-line. In the automatic mode, the thermometer fully sequences the test and applies real
time corrections to the calorimeter temperature rise
in order to correct for all systemic heat leak effects.
In either case, the operator must determine the appropriate temperature source for the jacket.
• Probe – This method uses a thermistor probe
attached to the jacket wall to measure the actual
temperature of the surroundings (at the chosen
point) and the heat leak corrections are based
upon the actual differences between the bucket
and this external jacket temperature.
• Calculated – During the initial equilibrium period
this method analyzes the actual heat leak rate
and calculates the apparent temperature of the
surroundings which would generate this rate and
applies this calculated jacket temperature for the
determination.
• Fixed – In this method the operator determines
what his jacket temperature will be and enters it
into the thermometer. All heat leak corrections are
then based upon this fi xed jacket temperature.
For most applications the calculated method is recommended.
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3
Operation
Sample Size
The rotating sample cell will hold up to 20 ml of
liquid sample or a solid sample weighing up to one
gram. More than one gram of solid may be used in
some cases, but smaller samples are preferred so
that the heat capacity and ionic strength of the system will not change signifi cantly when the reactants
are mixed. The Dewar must be fi lled with not less
than 90 ml and not more than 120 ml of liquid to
properly cover the rotating cell.
Filling the Dewar
It is best to lift the Dewar out of the air can during
the fi lling operation. The liquid to be placed in it
can be measured volumetrically, or the Dewar can
be placed on a solution or trip balance and fi lled by
weight. After fi lling the Dewar, set it in the air can
and gently push the spacer ring down as far as it
will go.
Loading a Solid Sample
Solid samples should be suitably ground so that
they will dissolve quickly or mix uniformly with the
liquid in the Dewar. Place the 126C PTFE Dish on
an analytical balance and weigh the sample directly
into the dish. Be careful not to drop any of the sample into the push rod socket. After the fi nal weighing, set the dish on a fl at surface and carefully press
the glass bell over the dish to assemble the cell. Do
not grasp or press the thin-walled glass stem during this operation; it is fragile and will break easily. Instead, grasp the bell and press it fi rmly onto
the dish. Then lift the cover from the calorimeter
and attach the cell to the stirring shaft by sliding
the plastic coupling onto the shaft as far as it will
go and turning the thumbscrew fi nger tight. If the
thumbscrew is not tight against the shaft, the contents will not be released. If necessary, use a 9/64
Allen wrench to tighten further. Hold the cover in
a horizontal position and lower it carefully until
the bottom of the rotating cell rests on a fi rm, fl at
surface; then insert the push rod through the pulley
hub and press the end of the rod into the socket in
the 126C Sample Dish.
Loading a Liquid Sample
Liquid samples can be measured into the rotating
cell either by volume or by weight. Best precision is
obtained by weighing, but fi lling from a volumetric
pipette may be adequate in some cases. Set the
126C PTFE Dish on a fl at surface and press the glass
bell over the dish, handling the glass carefully as
described above. If the sample is to be weighed,
tare the empty cell on a laboratory balance; insert a
pipette through the glass stem and add the liquid,
then reweigh the cell. Attach the cell to the stirring
shaft and insert the push rod.
Installing the Loaded Cover Assembly
Install the thermistor probe in the cover opening
and press the bushing fi rmly into place to anchor
the probe in its proper position. Lower the cover
assembly with the cell and thermistor probe into the
Dewar and set the cover in place on the air can, then
drop the drive belt over the pulleys and start the
motor as required.
Combining the Reactants
Each test in a solution calorimeter can be divided
into three distinct time periods:
1. A pre-period during which the reactants are allowed to come to an initial thermal equilibrium.
The thermometer will beep to inform the operator that it has established the initial equilibrium
and that it is now time to initiate the reaction.
2. A reaction period during which the reactants are
combined and an enthalpy change occurs in the
system.
3. A post-period during which the calorimeter
again comes to equilibrium. The thermometer
will produce a report when the fi nal equilibrium
has been achieved and that the test is complete.
At the end of the pre-period, start the reaction by
pressing the push rod downward to drop the sample
out of the rotating cell. This should be done quickly
without interrupting the rotation of the rod without
undue friction from the fi nger. Push the rod down
as far as it will go; after which it should continue
to rotate the pulley. Let the stirrer continue to run
during the reaction and the calorimeter reports its
results.
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6755
Operation
3
Emptying the Calorimeter
Stop the calorimeter motor, raise the cover carefully
and wipe any excess liquid from the parts that were
immersed in the Dewar. Remove the thermistor
probe from the cover and remove the sample dish
from the end of the push rod; then remove the rod
and release the glass cell from the drive shaft. Lift
the Dewar out of the air can and empty it; then wash
and dry all wetted parts carefully.
The two operating modes, (manual or automatic)
are outlined below:
Manual Test Sequencing
Some users may wish to construct their own thermo
gram and apply the classic graphical corrections developed by Dickenson and others. In this case, the
actual temperatures can be logged to the memory
of the thermometer and then analyzed at the end of
the test. These logged temperatures can be printed
on an attached printer or transferred to a computer
using an SD Card. The Ethernet Connection can also
be used to transfer temperatures to a computer for
plotting.
First, select the appropriate jacket temperature
source as described previously. Then fi ll the Dewar.
Next, prepare and load the reaction. After the calorimeter is fully assembled, turn on the motor, and
then turn on the stirrer by pressing the stirrer key on
the calorimeter operation menu screen. Turn on the
data logger (accessed via the Diagnostics page) in
order to periodically record the bucket or calorimeter temperature. The bucket temperature is updated
every 10 seconds. Turn on the calorimetric preperiod. The pre-period should last for 6-7 minutes.
After the 6-7 minute pre-period test phase, start the
reaction by pressing the push rod downward to
drop the sample out of the rotating cell. This begins the reaction and subsequent post-period. The
calorimeter temperature should begin to signifi cantly change at this point, indicating sample reaction. The calorimetric post-period should last for an
additional 6-7 minutes from sample introduction. At
the conclusion of the post-period, turn the stirrer off
by pressing the stirrer key once again. The motor
switch may be left in the “on” position for subsequent tests. Empty and clean the calorimeter.
If the data log destination is a log fi le, the log fi le is
located at /fl ash/log/datalog.csv and may be retrieved via FTP. The log fi le is easily imported into a
spreadsheet program where the calorimeter temperature can be plotted in order to realize a thermal
curve. Instructions for working with or analyzing
thermal curves are found in the calculations section.
Automatic Test Sequencing
The solution calorimeter will perform all calculations for the user. To do this, fi rst select the appropriate jacket temperature source. For most
applications, the calculated jacket approach works
well. First, select the appropriate jacket temperature
source as described previously. Then fi ll the Dewar.
Next, prepare and load the reaction. After the calorimeter is fully assembled, turn on the motor, and
then press the START key located on the right hand
side of the screen. This will activate the stirrer that
gently circulates the fl uid that surrounds the glass
cell. The thermometer will prompt for the sample
ID number. This begins the calorimetric pre-period.
After the thermometer determines that adequate
temperature equilibrium is realized, the thermometer will prompt the user to start the reaction by
pressing the push rod downward to drop the sample
out of the rotating cell. This starts the calorimetric
post-period. The calorimeter temperature should
begin to signifi cantly change at this point, indicating
sample reaction. The calorimetric post-period will
last for an additional 6-7 minutes until the calorimeter temperature drift rate suffi ciently stabilizes. At
the end of the post-period the calorimeter will signal
the end of the test and generate a report.
Stop the calorimeter motor, raise the cover carefully
and wipe any excess liquid from the parts that were
immersed in the Dewar. Remove the thermistor
probe from the cover and remove the sample dish
from the end of the push rod; then remove the rod
and release the glass cell from the drive shaft. Lift
the Dewar out of the air can and empty it; then wash
and dry all wetted parts carefully.
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4
Menu Descriptions
CHAPTER 4
Menu Descriptions
Note: Keys which make global changes to the
setup of the calorimeter contain a YES or NO
response to make certain that the user wishes
to proceed. This two step entry is intended to
prevent inadvertent global program changes.
Main Menu
Selecting the Main Menu key on any menu will return you to the screen pictured below.
Calorimeter Operation Menu
The Calorimetric Thermometer will normally be
operated from the Calorimeter Operation Menu,
although tests can always be started from any menu
screen.
1. : This key appears in the Escape key loca-
tion when the main menu is displayed. This key
is used to shut down the calorimeter program
before turning off the power.
2. Start Key: Press the Start key to begin an Auto-
matic Test.
3. Report: Press the Report key to begin the report-
ing process.
4. Help: Press the Help key on any screen to dis-
play the explanation text for that screen.
Temperature Graph: Press this key to display a realtime plot of the bucket and/or jacket temperature on
the Temperature vs. Time Plot screen.
Stirrer: Toggles ON/OFF. This key provides a convenient way to manually start and stop the calorimeter
stirrer motor. The motor must be physically turned
on for this function to be active.
Temperature vs. Time Plot
12
Press the Setup key to access the Temperature Plot
Setup Menu, which has many keys that permit the
user to fully customize both the x (time) axis and the
scaling of the y axis.
Parr Instrument Company
6755
Menu Descriptions
4
Temperature Plot Setup Menu
Enable Bucket: Toggles ON/OFF.
Bucket Autoscale: Toggles ON/OFF.
Enable Jacket: Toggles ON/OFF.
Jacket Min Value: Press this key to access its
numeric dialog box to set a minimum jacket
value.
Time Window: Sets the time scale for the Xaxis.
Time Units: Toggles between minutes and
seconds.
Bucket Plot Color: Toggles between:
» Red
» Green
» Yellow
» Blue
» Magenta
» Cyan
» White
» Black
Bucket Max Value: Press this key to access its
numeric dialog box to set a maximum bucket
value.
Jacket Autoscale: Toggles ON/OFF.
Time Mode: Toggles between Autoscale, Win-
dow, and Range.
Bucket Plot Symbol: Toggles between:
» No Point
» Small Dot
» Round
» Square
» Up Triangle
» Down Triangle
» Diamond
Bucket Min Value: Press this key to access its
numeric dialog box to set a minimum bucket
value.
Jacket Plot Symbol: Toggles between (same as
Bucket Plot Symbol, above).
Jacket Plot Color: Toggles between (same as
Bucket Plot Color, above).
Jacket Max Value: Press this key to access its
numeric dialog box to set a maximum jacket
value.
Time Minimum: Press this key to access its
numeric dialog box to set the least amount of
time for the run.
Time Maximum: Press this key to access its
numeric dialog box to set the greatest amount
of time for the run.
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Menu Descriptions
Operating Controls Menu
Method of Operation: Offers an operating mode
of either combustion or solution. In the solution
calorimetry mode, the instrument menu structure is
streamlined in order to remove items that are only
relevant to solution calorimetry. The text on the key
displays the current instrument operating mode.
Pressing the key will prompt the user to restart the
calorimeter, loading the appropriate menu structure.
Help screens are context sensitive with respect to
the operating mode.
LCD Backlight Intensity: This key accesses a submenu with a slide control which adjusts the brightness on the LCD display for optimum viewing.
Print Error Messages: When turned ON, all error
messages will be printed on the printer as well as
displayed on the screen. When turned OFF, messages will only display on the screen.
Language: Steps the Calorimetric Thermometer
through the installed operating languages.
Program Information and Control Menu
Jacket Temp. Source: Press this key to display a
menu that allows the user to select the source for
the jacket temperature used for tests.
Calibrate Touchscreen: This key prompts the user
to touch the screen at predefi ned points in order to
facilitate touch screen calibration. It is important that
a touch screen stylus, rather than a fi nger, be used
in order to realize an accurate calibration.
LCD Backlight Timeout: The unit is equipped with
an automatic circuit to shut off the backlight when it
is not being used. The back light will shut off if there
is no keyboard activity for the number of seconds
entered. Pressing any key will automatically turn
the back lighting ON. A setting of 0 will keep the
backlight ON at all times.
Date & Time Settings: Access the sub-menu on
which Date & Time are set.
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Parr Instrument Company
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