Digi-Sense DualLogR 91100-50 User manual

Cole-Parmer Instrument Co.
625 East Bunker Court
Vernon Hills, Illinois U.S.A. 60061-1844
[phone]
[phone] (Fax)
800-323-4340
www.coleparmer.com
e-mail: [e-mail]
A-1299-0630
Edition 07
DualLogR®
THERMOCOUPLE THERMOMETER
MODEL NO. 91100-50
®

CERTIFICATE OF
CONFORMANCE
This thermometer was calibrated using
equipment traceable to the National Insti-
tute of Standards and Technology (NIST).
This instrument conforms to
NIST monograph 175 revised
to ITS-90.
The accuracy of the thermometer at the
time of calibration was within specifications
stated in the operating manual.
ModelNo.:__________________________
Serial Number:______________________
Date placed in service:________________
To purchase an NIST certificate of trace-
ability with test data and test date for meter
and probe please contact:
Cole-Parmer Instrument Company
625 East Bunker Court
Vernon Hills, Illinois USA 60061-1844
Toll-free: 800-323-4340

1
INTRODUCTION
Thisversatilehand-heldinstrumentprovideshighly
accurate temperature measurements in Celsius,
Fahrenheit, Rankine,or Kelvin usinga widerange
ofthermocouple types. The temperaturerangefor
each type thermocouple is listed in the following
chart.
TYPE °C °F
J –200 to 1000 –328 to 1832
K –250 to 1372 –418 to 2501
T –250 to 400 –418 to 752
E –250 to 1000 –418 to 1832
N –250 to 1300 –418 to 2372
B 200 to1800 392 to3272
R 0 to1768 32 to 3214
S 0 to 1768 32 to 3214

2
Theinstrument isdesignedforeasyoperationand
includesthe followingfeatures:
• Operator selectionof temperaturescale
•Resolution of 0.1° from −150°C to 999.9°C
(−238°Fto999.9°F)
• LCD with three four-digit displays
• Two (2-bladefemale)ANSImini-connectorinputs
• Hold feature for temporarily retaining areading
• Two-point field calibration capability
• Low battery warning
• Stores or logs upto 1000 readingswith real-time
markers
• Scrolls through all stored readings
• Displays MIN and MAX readings
• Scrolls betweenT1,T2, andT1-T2 readings
• Interfaces with optional HEWLETT PACKARD®
infraredprinter or optionalRS-232-C adapter
• Prints temperature and timeof reading
• Built-in tilt stand for easy hands-free operation

3
SAFETY PRECAUTIONS
THIS INSTRUMENT IS
DESIGNED TO ACCEPT
LOW LEVEL SIGNALS SUPPLIED BY STAN-
DARD THERMOCOUPLES. UNDER NO CIR-
CUMSTANCES SHOULDTHE INPUTVOLTAGE
EXCEEDTHE SPECIFIED 50V RMS.
DO NOT USE OR STORE
THIS INSTRUMENT IN MI-
CROWAVEOVENS ORANYABNORMALLYHOT
OR COLD AREAS.
WEAKBATTERIES SHOULD
NOT BE LEFT IN THE IN-
STRUMENT. DEADBATTERIES CANLEAKAND
CAUSE DAMAGETO UNIT.
VOLTAGES PRESENT AT
THETHERMOCOUPLE MAY
ALSO BE PRESENT AT THE BATTERYTERMI-
NALS. ALWAYS DISCONNECT THE THERMO-
COUPLEWHEN CHANGING BATTERIES.
TO PREVENT IGNITION OF
A HAZARDOUS ATMOS-
PHERE,BATTERIESMUST ONLYBECHANGED
INANAREA KNOWNTOBENON-HAZARDOUS.
AFIN DE PREVENIR
L’ INFLAMMATION
D’ATMOSPHERES DANGEREUSES, NE
CHANGER LES BATTERIES QUE DANS DES
EMPLACEMENTS DESIGNES NON DAN-
GEREUX.
TO PREVENT IGNITION OF
A HAZARDOUS ATMOS-
PHERE BY ELECTROSTATIC DISCHARGE,
CLEANWITH DAMP CLOTH.
WARNING
DANGER
WARNING
CAUTION
CAUTION
AVERTISSEMENT
WARNING

4
SPECIFICATIONS
THERMOCOUPLE PROBES
Type Temperature Range
Type J: –200°C to 1000°C(–328°F to 1832°F )
Type K: –250°Cto1372°C(–418°Fto2501°F)
TypeT: –250°C to 400°C(–418°F to 752°F )
Type E: –250°C to 1000°C(–418°F to 1832°F )
Type N: –250°Cto1300°C(–418°Fto 2372°F)
Accuracy > –150°C: ±0.1% ofreading, ±0.4°C
(+0.7°F)
Accuracy < –150°C:+0.25% of reading, +1°C
(+ 2°F)
Type B: 200°C to 1800°C (392°F to 3272°F)
Type R: 0°C to 1768°C( 32°F to 3214°F )
Type S: 0°Cto 1768°C( 32°F to3214°F )
Accuracy: + 0.1% of reading, + 1°C (+ 2°F)
Linearization:Conforms toNIST monograph175
revisedtoITS-90.
Input Protection:50V rms
Display Update:0.6 seconds perupdate
Connector:Two-bladefemale ANSImini-connec-
torinputs.
Battery
Size: Two AA, 1.5V alkaline ANSI-L40,
IEC-LR6
Life: 750hourscontinuous,typical.
Display: LCD with 0.4 in high characters main
readout and 0.2 in high characters secondary
displays, 4 digits each display plus various an-
nunciators.

5
Temperature/Humidity Range
Operating:
StatedAccuracy: 18°Cto28°C
(64°Fto82°F)
UsefulRange: 0°Cto40°C
(32°Fto104°F)
Storage: −40°Cto 65°C
(−40°Fto 149°F)
Humidity: 10%to 90%
(non-condensing)
Dimensions
3 cm D x 8.4 cm W x 15.8 cm H
(1.2 in x 3.3 in x 6.2 in)
Weight with batteries:227 grams (8 ounces)
Ingress protection: MeetsIEC-529IP-54 fordust
andwater resistant enclosures.
Intrinsic safety
Thisproductisenergylimitedforintrinsicallysafe
operationinhydrogenatmospheresper ClassI,
Division 1, Groups A, B, C, and D hazardous
(classified)locationsforULper UL913 andCSA
per C22.2 No. 0-M1982 and No. 157-M1987.
Maximumsurfacetemperature:135°C(T4);UL
fileNo.E182612(1997).
Compliance (For CE Mark):
EN61326-1/1A:1998
(EU EMC Directive)

6
BATTERY INSTALLATION AND
REPLACEMENT
WEAKBATTERIES SHOULD
NOT BE LEFT IN THE
INSTRUMENT. DEAD BATTERIES CAN LEAK
AND CAUSE DAMAGETO UNIT.
VOLTAGES PRESENT AT
THETHERMOCOUPLE MAY
ALSO BE PRESENT AT THE BATTERYTERMI-
NALS. ALWAYS DISCONNECT THE THERMO-
COUPLEWHEN CHANGING BATTERIES.
TO PREVENT IGNITION OF
A HAZARDOUS ATMOS-
PHERE,BATTERIESMUST ONLYBECHANGED
INANAREA KNOWNTOBENON-HAZARDOUS.
AFIN DE PREVENIR
L'INFLAMMATION
D'ATMOSPHERES DANGEREUSES, NE
CHANGER LES BATTERIES QUE DANS DES
EMPLACEMENTS DESIGNES NON DAN-
GEREUX.
CAUTION
DANGER
WARNING
AVERTISSEMENT

7
If battery indicator turns on, battery life is approxi-
mately8to10 hours. Thebattery indicator willstart
blinkingwithless than 1hourof liferemaining.Bat-
teries must bechanged.
ATTHIS POINT,BATTERYMUSTBECHANGED.
IF BATTERY VOLTAGE GOES TOO LOW, DIS-
PLAYWILL GO BLANK.
SeeSPECIFICATIONSforbattery type.
1. Before changingbattery,turn instrumentoffand
disconnectthermocouple(s).
2. Loosen screw and lift battery cover off back of
case.
3. Removethe twoAA batteries.
4. Insert two newbatteries observing polarity.
5. Install cover and tighten screw.
AC ADAPTER
An optional AC adapter can be used for power to
conserve batteries. The adapter is not a charger
and will not charge batteries. The adapter con-
nectstothe bottomof thethermometer.Whenthe
adapter is connected, the batteries are discon-
nected. This adapter is not intended for use in
a hazardous area.

8
CONNECTING A THERMOCOUPLE
Note: Be sure your instrument setting (B, N,T, J,
K, E, R or S) matches the thermocouple you are
using.
Usethe correctthermocouple type foryourinstru-
ment. Using an incorrect thermocouple type will
result in erroneous readings. Thermocouples are
colorcodedbytypeusingtheNorthAmerican ANSI
ColorCode asfollows:
TYPE COLOR TYPE COLOR
J Black N Orange
K Yellow B Gray
T Blue R Green
E Purple S Green
Thermocoupleconnectorshaveonewidebladeand
onenarrowblade. Donot forceconnector inback-
wards. Connect thermocouple(s) to receptacle at
topof instrument.
If only one thermocouple is being used, it can be
connectedtoeitherT1orT2. The thermometer will
automaticallydetermine whichconnector is being
used. Whentwothermocouplesare used, connect
one to the T1 connector and one to the T2
connector.
Thermocouple wiring polarity must be correct. If
readings decrease as the temperature increases,
thethermocouple wires maybereversed. The red
wire is negative for thermocouple wires manufac-
turedin NorthAmerica.

9

10

11

12
QUICK SETUP
Note:Reviewwarnings on page 6.
1. Installbatteries.
2. Connectthermocouple(s).
3. Press the ON/OFF key. The thermometer per-
forms a self-test and all display digits and indi-
cators, as shown below, should remain on for
approximatelyone second.Theclockwillremain
onforabout threeseconds.
4. UseSETUPto selectthe correct thermocouple
and the desired scale. Use ▲or ▼to make
selections, to enter selections and go to
next step.
If a thermocouple has not yet been connected to
oneor moreinputs onthe instrument,you will see
thisdisplay:
This message also appears if a thermocouple is
broken.No measurementscan be madewhile this
warning isdisplayed.

13
COMPLETE SETUP PROCEDURE
Thesetupfunction scrolls throughaseries ofsteps
forselectingthermocoupletype,temperaturescale,
resolution,filterdampeningrate,settingthereal-time
clock,andaccessingtheLogsub-menuandthePrint
sub-menu.Either thecompletesetupcanbe runas
described below, or the setup can be initiated and
terminated at any step.The Log sub-menu and the
Print sub-menu can be accessed without going
through the complete setup.These variations are
coveredinthefollowingprocedures.
NOTE
SettingsselectedintheSetupprocedureare stored
in memory and will remain even after power is
turned offor whilebatteries arebeing replaced.
Press the SETUP key. The SETUP and TYPE
annunciatorswill beon andthe lastselected ther-
mocoupletype willbe flashing.
SELECTINGTHERMOCOUPLETYPE
PresstheMAX ▲▲
▲▲
▲keyor MIN ▼▼
▼▼
▼keyto step through
the eight selections. When the correct thermo-
couple type is flashing, press the
HOLD key to advance to the next step in the
setupsequence.
TEMPERATURE SCALE
1. TheSETUPand one temperaturescaleannun-
ciator (°C, °F, °R, or K) in the upper right hand
corner of the display will be flashing.
2. Press the MAX ▲▲
▲▲
▲key or MIN ▼▼
▼▼
▼key to step
through the four selections. When the correct
temperature scale is flashing, press the
HOLD keyto advanceto thenextstepin the
setupsequence.

14
TEMPERATURE RESOLUTION
When 0.1°resolution is selected, a decimal point
will appear in the three numerical displays. When
1° resolution is selected, no decimal point will be
present. When measuring temperature above
999.9°orbelow−150°C,thethermometerautomati-
callyautorangesto 1°resolution.
The SETUP annunciator will be on. If the instru-
mentis set for0.1°resolution the decimalpoint will
appear in the display.Press either MAX ▲▲
▲▲
▲key or
MIN ▼▼
▼▼
▼key to change resolution, then press the
HOLD toadvance to the nextstep inthe setup
sequence.
FILTER DAMPENING
The filter dampening rate can be set to OFF or
ON. This rate is changed to smooth out fluctua-
tionsin the readings. Normally thiswouldbeset to
OFF. If readings are unstable, change to ON.
The SETUP annunciator will be on and the lower
left display will read “FILt”and the upper display
will flash either OFF or ON. Use the MAX ▲▲
▲▲
▲key
or MIN ▼▼
▼▼
▼keys to switch the dampening rate, the
pressHOLD keytostore therate and continue
setup by setting the real-time clock.
SETTING REAL-TIME CLOCK
1. When setting the real-time clock, the SETUP
annunciatorwill be onand theright twodigitsin
the lower left display will be flashing. Use the
MAX ▲▲
▲▲
▲key or MIN ▼▼
▼▼
▼keyto adjustthe flashing
digitsto thedesired minutesetting.
2. Press HOLD key to lock in the minutes and
advancetothe hourssetting.
Hours are set in the 24 hour time system.There-
fore, time after 12:59 pm requires 12 to be added
to the time. For example, 3:00 PM is (3+12) =
15:00 hours.

15
3. TheSETUPannunciatorwill beonand theleft
two digits in the lower left display will be flash-
ing. UsetheMAX ▲▲
▲▲
▲keyorMIN ▼▼
▼▼
▼keytoadjust
theflashing digitsto thedesired hoursetting.
4. PresstheHOLD keyto storethehours and
advancetothe monthsetting.
5. The SETUP and MO annunciators will be on
andthe right two digitsin thelowerleft display
willbe flashing. UsetheMAX ▲▲
▲▲
▲keyor MIN ▼▼
▼▼
▼
key to adjust the flashing digits to the desired
monthsetting (1 to 12).
6. Press the HOLD key to store the months
and advance to the day setting.
7. The SETUP and DA annunciators will be on
and the right two digits in the lower right dis-
play will be flashing. Use the MAX ▲▲
▲▲
▲key or
MIN ▼▼
▼▼
▼key to adjust the flashing digits to the
desired day setting (1 to 31).
8. Press HOLD key to store the day and ad-
vance to the year setting.
9. The SETUP and YR annunciators will be on
andthe fourdigits in thelowerrightdisplaywill
beflashing. Usethe MAX ▲▲
▲▲
▲key orMIN ▼▼
▼▼
▼key
toadjust theflashing digitsto thedesired year
setting(1996 to2059).
10. Press HOLD key to lock in the year. This
completes the basic operation setup and re-
turns to normal operation. To setup thelog or
print functions proceed to the following para-
graphs.

16
LOG SETUP
TheLog sub-menuis usedtoset thetimeintervals
betweenthe logged readings.Thetimecan beset
from 1 second to 60 minutes. Once the log sub-
menuis setup,logging canbe toggledON orOFF
by pressing the LOG key.When logging is turned
ON it will continue until turned OFF or 1000 logs
have occurred at the entered rate.The first 1000
logsare retained.
1. Any time while in SETUP, press the LOG key.
The SETUP and LOG annunciators will be on
andthepresently set timeinterval(defaultis one
second) will be displayed in the lower left dis-
play. Thetworightdigits represent secondsand
willbe blinking.
2. UsetheMAX ▲▲
▲▲
▲keyor MIN ▼▼
▼▼
▼keystoadjustthe
“seconds”as desired. Press HOLD key to
storesettingand advanceto“minutes”setting.
3. UsetheMAX ▲▲
▲▲
▲keyor MIN ▼▼
▼▼
▼keystoadjustthe
“minutes”as desired. Press HOLD key to
storesetting.Thiscompletesthe Logging setup.
PRINT SETUP
The Print sub-menu is used to set the time inter-
valsbetween thereadingsbeingsent to theprinter.
Thedefaultrateis onceevery threeseconds. The
timecanbesetfrom3secondsto60minutes. Once
theprint sub-menuis setup,printingcan be toggled
ONor OFFbypressingthe PRINT key. Inaddition
thedatarate for theinfraredRS-232-Coutput can
also be set.
1. Any time the PRINT key is pressed while in
SETUPtheSETUPandPRINTannunciatorswill
beonand thepresentlyset time interval(default
is three seconds) will be displayed in the lower
left display.The two right digits represent sec-
ondsand willbe blinking.

17
2. Use the MAX ▲▲
▲▲
▲key and/or MIN ▼▼
▼▼
▼keys to ad-
just the “seconds”as desired. Press HOLD
keyto store settingand advanceto the“min-
utes”setting.
3. Use the MAX ▲▲
▲▲
▲key and/or MIN ▼▼
▼▼
▼keys to ad-
just the “minutes”as desired. Press HOLD
key to store setting and proceed to the data
outputrate.
4. UsetheMAX ▲▲
▲▲
▲keyand/or MIN ▼▼
▼▼
▼keysto scroll
through the available data output rates of HP,
300, or 600, (Use HP for the HEWLETT-
PACKARDinfraredprinter).PressHOLD key
tostore settingandend thesetup.Thedata out-
put rates of 300 and 600 are for use with the
optionalinfrared to RS-232-Cadapter.
SELECTING INDIVIDUAL PARAMETERS
The thermocouple type, temperature scale, reso-
lution,filter update rate,andreal-timeclockcan be
set individually without performing the complete
setup.Firstpress theSETUP key, then repeatedly
press the HOLD key until the desired function
isdisplayed. Use the▲▲
▲▲
▲▼▼
▼▼
▼keysto change thefunc-
tion and press HOLD key to store setting.

18
OPERATING PROCEDURES
The unit will always power up with the upper dis-
play showing T1 unless T1 is not connected. If
only T2 is connected at power up, the upper dis-
play shows T2 and the lower left display indicates
T1is open. Ifthermocouples arenot connectedto
T1 orT2 at power up, the upper display indicates
anopenT1 and thelowerright display indicatesan
openT2.
If you are in single probe mode and the probe is
movedtothe otherconnectoror to restorethedual
probe mode, turn power OFF then back ON.
Foroptimumoperation, allowabout one minutefor
ambient temperature stabilization. If the unit has
beenstoredatan extremeambientcondition,more
timemaybeneeded.
BASICTEMPERATURE MEASUREMENTS
Check that the thermometer is turned on, the
probe(s)connected, thedesired resolution 0.1°or
1°is selected, andthe desiredscale °F, °C, °R,or
K is selected.
Single Probe Measurements
Thethermometer willautomaticallydetermineifthe
T1 orT2 connection is being used.
Initiallytheupperdisplaywillindicatethemeasured
temperatureandtheannunciatorwillindicatewhich
probeismakingthemeasurement. Oneofthelower
displayswill indicate openand the annunciatorwill
indicate which probe is open. Pressing the T1/T2
keywillcausethe thermometer togointothesingle
probedifferentialmodedescribedlater.
Temperatures > 999.9°havearesolution of 1°and
thereforenodecimal willbe present.