Neslab RTE 7 Guide

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Product Service Information, Applications
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Voice Info: [phone]
NESLAB RNESLAB R
NESLAB RNESLAB R
NESLAB RTETE
TETE
TE
Refrigerated BathRefrigerated Bath
Refrigerated BathRefrigerated Bath
Refrigerated Bath
Thermo Manual P/N U00694 Rev. 07/13/05
Installation-Operation-Installation-Operation-
Installation-Operation-Installation-Operation-
Installation-Operation-
Basic ServiceBasic Service
Basic ServiceBasic Service
Basic Service
Nopartof this publicationmayberepro-
ducedorreprintedexceptforpersonaluse
withoutthepriorpermissionofThermo
Electron.
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Table of Contents
Preface
Compliance ..............................................................................................................2
WEEECompliance...................................................................................................2
Unpacking ................................................................................................................2
Warranty...................................................................................................................2
After-sale Support....................................................................................................3
NES-care Extended Warranty Contract...................................................................3
Copyright .................................................................................................................3
Feedback .................................................................................................................3
SectionISafety
Warnings.................................................................................................................. 4
SectionIIGeneral Information
Quick Reference Operating Procedures.................................................................6
Description...............................................................................................................7
Specifications ...........................................................................................................7
SectionIIIInstallation and Operation
Site ......................................................................................................................... 11
Electrical Requirements.........................................................................................12
Plumbing Requirements ........................................................................................14
Fluids .....................................................................................................................16
Filling Requirements..............................................................................................17
Controller (Digital One/Digital Plus) ......................................................................17
Start Up/Shut Down................................................................................................19
Setup/Tuning Loop ................................................................................................21
Controller (Digital Plus) .........................................................................................22
Computer Setup Loop .......................................................................................... 24
Timer Setup Loop ..................................................................................................25
Offset Setup Loop..................................................................................................26
Analog A I/O Port - Optional...................................................................................27
High Temperature Cutouts.....................................................................................28
Nitrogen Purge.......................................................................................................29
Accessories............................................................................................................29
SectionIV BasicMaintenance
Reservoir Fluid ......................................................................................................33
Reservoir Cleaning ................................................................................................33
Algae ......................................................................................................................33
Condenser Cleaning..............................................................................................33
Internal Temperature Sensor (rtd1) Calibration ....................................................34
External Temperature Sensor (rtd2) Calibration ...................................................35
Optional Analog Port/Calibration - Optional..........................................................36
SectionVTroubleshooting
Error Codes ...........................................................................................................37
External Sensor Connector ...................................................................................38
Checklist.................................................................................................................39
Service Assistance.................................................................................................40
PIDValues..............................................................................................................40
BOM Decoder ........................................................................................................41
Displaying Software Version Number ....................................................................41
AppendixAFluids
AppendixBNC SerialCommunicationsProtocol
AppendixCInternationalQuick Reference OperatingProcedures
WARRANTY
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Preface
Compliance ULListedto UL3101-1(UL61010A-1)
CertifiedtoCSA C22.2No.1010.1
ComplieswithIEC/EN61010-1
Productstestedandfound to be in compliance with therequirementsdefined in
theEMC standards defined by89/336/EEC as well asLow Voltage Directive
(LVD) 73/23/EEC can be identified by the CE label on the rear of the unit. The
testinghasdemonstratedcompliancewiththefollowingdirectives:
LVD,73/23/EEC EN610010-1:1993
EMC,89/336/EEC EN61326-1:1998
Foranyadditional information,referto theLetterofCompliancethatshipped
withtheunit(DeclarationofConformity).
WEEE Compliance This product is required to comply with the European Union’s Waste Electrical
& Electronic Equipment (WEEE) Directive 2002/96/EC. It is marked with the
followingsymbol:
ThermoElectronhascontractedwithoneormorerecycling/disposal companies
in each EU Member State, and this product should be disposed of or recycled
throughthem.Furtherinformationon ThermoElectron’scompliancewiththese
Directives,the recyclersin yourcountry,andinformation onThermo Electron
products which may assist the detection of substances subject to the RoHS
Directiveareavailableat:www.thermo.com/WEEERoHS
Unpacking Retain all cartons and packing material until the unit is operated and found to
be in good condition. If the unit shows external or internal damage contact the
transportationcompany and file adamage claim. Under ICCregulations,this is
yourresponsibility.
Warranty Unitshaveawarrantyagainstdefectivepartsandworkmanshipfor24months
from date of shipment. See back page for more details.
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S/N: 101039026
After-saleSupport ThermoElectronCorporationiscommittedtocustomerservicebothduringand
afterthe sale. If youhave questions concerningtheunit operation, contactour
SalesDepartment. If yourunitfails to operateproperly, or ifyouhave questions
concerningsparepartsorServiceContracts,contactourServiceDepartment.
Beforecalling,pleaseobtainthefollowinginformation:
- unit BOM number_________________________________
- unit serial number ________________________________
-unitsoftwareversion ______________________________
-voltageofpowersource ____________________________
Theunit’s BOM numberand serial numberare printed onthename platelabel
located on the rear of the unit. See page 41 for instructions on how to decode
your unit's BOM number. See page 41 for instructions on how to display the
softwareversion.
NES-care Extended
Warranty Contract • Extendpartsandlabor coverage foran additional year.
• Worry-freeoperation.
• Control service costs.
• Eliminatetheneed to generate repairorders.
• No unexpected repair costs.
Othercontract options areavailable.Please contact Thermoformore
information.
Copyright ©2005 ThermoElectron Corp.623-2087
Allrightsreserved. This document isforinformational purposes only andis
subject to change without notice.
Feedback We appreciate any feedback you can give us on this manual. Please e-mail us
at[email protected].Besuretoincludethe manualpart number
andtherevisiondatelisted onthe frontcover.
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Section I Safety
Warnings Warningsarepostedthroughoutthemanual.Thesewarningsaredesignated
by an exclamation mark inside an equilateral triangle and text highlighted in
bold.Readand followtheseimportantinstructions.Failuretoobservethese
instructions can result in permanent damage to the unit, significant property
damage,orpersonalinjuryordeath.
Thelightning flashwitharrowsymbol,withinanequilateraltriangle,is intended
toalertthe usertothepresenceofnon-insulated"dangerousvoltage"within
theunit'senclosure. The voltage maybeof significant magnitude toconstitute
a risk of electrical shock.
This label, engraved into the front of the tank lip, indicates the presence of hot
surfaces.
Makesureyou read and understand all instructionsandsafety precautions
listedinthismanual before installing or operating your unit. If youhaveany
questionsconcerningthe operation of your unitorthe information in this
manual,contact ourSales Department.
Performance of installation, operation, or maintenance procedures
other than those described in this manual may result in a hazardous
situation and may void the manufacturer's warranty.
Transport the unit with care. Sudden jolts or drops can damage the
refrigeration lines. The units weigh approximately: RTE 7, 60 pounds (27
kilograms);RTE10,68 pounds (31kilograms);RTE17,71 pounds (32
kilograms);RTE740,87pounds(39kilograms).Unitsshouldbetrans-
ported with equipment designed to lift these weights.
Observe all warning labels.
Never remove warning labels.
Never operate damaged or leaking equipment.
Never operate the unit without bath fluid in the bath.
The user is responsible for the fluid used. Never use pure ethylene
glycol as a bath fluid, the flash point of 100% ethylene glycol is 111°C.
100% ethylene glycol may produce flammable vapors that can be
ignited by an open flame or an ignition source. When mixed with
water, ethylene glycol is not flammable. Also, at high temperatures
pure ethylene glycol may produce hazardous vapors.
Always turn off the unit and disconnect the line cord from the power
source before performing any service or maintenance procedures, or
before moving the unit.
Always empty the bath before moving the unit.
Never operate equipment with damaged line cords.
Refer service and repairs to a qualified technician.
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Circuit Breaker(s).
Reservoir. See page 16.
Controller. See page 17.
Condenser Access Panel.
See page 33.
Section II General Information
Indicates refrigeration
system status. See
page 17.
Indicates the controller is
displaying the setpoint. Press
the arrow buttons to change the
value. See page 18.
Indicates the controller is
displaying the unit's low
temperature alarm setpoint.
Press the arrow buttons to
change the value. See page 18.
Indicates the controller is displaying
the high temperature alarm
setpoint. Press the arrow buttons
to change the value. See page 18.
Press to select the serial
communication mode.
See page 22. Digital Plus
controller only.
Press to change the
displayed value. See
page 17.
Press to start/stop the
unit. See page 17.
Press to mute the alarm. See page
22. Digital Plus controller only.
Press to sequence
through the three indicators
and accept the displayed
value. See page 17.
NOTE: None of the three
setpoint indicators are
visible unless this key is
pressed.
Indicates heater status.
See page 17.
Press to select external
sensor. See page 22. Digital
Plus controller only. Press to select the timer
function. See page 23
Digital Plus controller
only.
Press to select the
temperature offset
mode. See page 23.
Digital Plus controller only.
1/8"OD Autorefill fluid
connection. See page 29.
1/4"MPTPumping
Return Connection. See
page 14.
Optional External Sensor
Connector.Digital Plus
controller only.
1/*4"MPTPumping
Supply Connection. See
page 14.
RS-232/RS-485
connections. See
Appendix B. Digital
Plus controller only.
Power connection.
See page 12.
Drain. See page 14.
High Temperature Cutout.
See page 28.
1/8"ODN2 Nitrogen
Purge. See page 29.
General Information
Autorefill connection.
See page 29.
Analog Output
Connector.Digital
Plus controller only.
See page 27.
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Quick Reference Operating Procedures
Operation
Before starting the unit, double-check all electrical
and plumbing connections. Make sure the bath is
properlyfilledwithfluid.
To start the unit, press . To turn the unit off
press again.
The LED indicates the status of the heater. It
illuminates to indicate the heater is on.
The LEDindicatesthe status of therefrigera-
tion system. It illuminates to indicate the refrigera-
tion system is removing heat from the cooling fluid.
Temperature Adjustment
Todisplaythe temperature setpoint, press on
thecontroller.The indicator will illuminateand
thedisplaywillflash the current setpoint value. To
adjustthe temperaturesetpoint, pressthearrow
buttons until the desired temperature setpoint is
indicated. Press again to confirm the change.
Thedisplay willrapidly flashthe newvaluefor a
short time and then return to the recirculating fluid
temperature.
Periodic Maintenance
Periodicallyinspect thereservoir fluid.If cleaningis
necessary,flushthereservoirwithacleaningfluid
compatiblewithyourapplication.
Thereservoirfluidshouldbereplacedperiodically.
Frequencydependsontheoperatingenvironment
andamountofusage.
Before changing the reservoir fluid ensure it is
at a safe handling temperature.
Periodicvacuumingofthecondenser finsisneces-
sary.Thefrequencyofcleaningdependsonthe
operatingenvironment.Werecommendamonthly
visualinspectionofthecondenserafterinitial
installation.Afterseveralmonths,thecleaning
frequencywillbeestablished.
Installation
Locate the unit on a sturdy work area. Ambient
temperaturesshould beinsidethe rangeof +50°F to
+104°F(+10°Cto+40°C).Themaximumoperating
relativehumidityis80%.
Neverplace theunit ina locationwhere excessive
heat,moisture,orcorrosivematerialsarepresent.
Theunithasanair-cooledrefrigerationsystem. Air
isdrawnthroughthefrontpanelanddischarged
throughthe rearpanel. Theunitmustbepositioned
so the air intake and discharge are not impeded. A
minimum clearance of 12 inches (30 centimeters) at
the front and rear of the unit is necessary for
adequateventilation.Inadequateventilationwill
reduce cooling capacity and, in extreme cases, can
causecompressorfailure.
Excessivelydusty areas shouldbe avoidedanda
periodiccleaningscheduleshould be instituted.
The unit will retain its full rated capacity in ambient
temperaturesuptoapproximately+75°F(+24°C).
Makesure thevoltageof thepowersource meets
thespecifiedvoltage,±10%.
Thepumpconnections are located at the rear ofthe
pump box and are labelled and . These
connectionsareangledupwardsotherecirculating
fluidwill drainback intothe reservoirwhenthe
hoses are disconnected. Both connections are
capped with stainless steel serrated plugs.
Thepump lineshave ¼"MPT formating with
standardplumbingfittings.Foryourconvenience
stainless steel adapters, ¼" FPT to 3/8" O.D.
serratedfitting,areprovided.
Thebathworkareahas ahigh andlowlevelmarker
toguidefilling. The markers are1inch horizontal
slits located in the center of the stainless steel
baffleseparatingtheworkareaandthepump
assembly.Thecorrectfluidlevelfallsbetween
these two markers. The unit will not start if the fluid
level is below the lower slit.
General Information
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Description TheNESLABRTERefrigeratedBath/Circulatorsaredesignedtoprovide
temperaturecontrolforapplicationsrequiringafluidworkareaorpumpingtoan
externalsystem.Units consist of a non-CFC air-cooled refrigeration system, circulation
pump, seamless stainless steel bath, work area cover, and a microprocessor temperature
controller.
Specifications1
Temperature Range2
Temperature Stability3
CoolingCapacity4,
Pump Capacity4
RTE7 RTE10 RTE 17 RTE 740
-25°Cto+150°C -22°C to +150°C -40°C to +200°C
±0.01°C
General Information
-40-30-20-10 0 10 20 30 40 5060 70 80 90100
Temperature °C
1100
1000
900
800
700
600
500
400
300
200
100
Heat Removal (Watts)
A=115/60 RTE-740 units
B=230/50 RTE-740 units
C=RTE-7, 10, 17
A
B
C
Pressure
Meters Feet
4.9 16
3.7 12
2.4 8
1.2 4
0.8 1.6 2.4 3.2 4.0 Gpm
3691215Lpm
Flow
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Time to Temperature
115V/60 Hz units
230V/50 Hz units
RTE-740units
General Information
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RTE7 RTE10 RTE17 RTE 740
65/8x 7¼ x 6
16.8 x 18.3 x 15.2 8¾x 9 3/8x 6 22.4 x 23.9 x 15.2 8¾ x 9 3/8x 9 22.4 x 23.9 x 22.9
1.9
7.2 2.6 9.8 4.5
17.0
65/8x 7¼ x 6
16.8 x 18.3 x 15.2
1.9
7.2
200170
60
27.2 68
30.8 71
32.2 87 39.5
R134a(6ounces) R404a(8ounces)
Heater(Watts)
115V/60HzModels
230V/50HzModels
100V/50-60HzModels
Refrigerant
Bath Work Area5
(W x L x D)
Inches
Centimeters
Bath Volume
Gallons
Liters
Air Flow Requirements
SCFM
Weight5
Pounds
Kilograms
General Information
1. Specifications subject to change.
2. Baths are tested at temperatures below freezing with denatured alcohol. This fluid is HIGHLY
flammable and is not recommended by Thermo. Above 80°C, baths are tested at with silicone
oil. This fluid is known to release a formaldehyde vapor (which is carcinogenic) above 150°C.
3. 20°C ambient. 20°C bath temperature using water. Sea level. Measured at the center of the
work area, work cover on, no external flow, stable ambient, full refrigeration (RTE-740 in
Energy Saving Mode). For some applications, agitation and stability above ambient may be
improved by connecting a small length of hose between the pump connections on the rear of
the unit.
4. 20°C ambient. 20°C bath temperature using water. Pump fully loaded. Sea level.
5. See next page for unit dimensions.
6. Add approximately 3 pounds (1.4 kilograms) for shipping weight.
800 1600 800
2000 2000 2000
800 1200 800
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Unitl Dimensions (inches)
General Information
B
A
C
1½
E
D
F
30°
½
Rear View Side View
105° 17/8
7/8
1
3¼
15/8
Unit Dimensions
Dimension A
Dimension B
Dimension C
Dimension D
Dimension E
Crate Dimensions
(D x W x H)
RTE 7 RTE 10 RTE 17 RTE 740
23 5/8 23 5/8 26 5/8 26 5/8
9 1/4 11 3/8 11 3/8 11 3/8
19 20 1/8 20 1/8 20 1/8
17 3/8 17 3/8 20 3/8 20 3/8
10 5/8 10 5/8 10 5/8 12 3/8
26½ x 18 x 33½
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Section III Installation and Operation
Site Locate the unit on a sturdy work area. Ambient temperatures should be inside
therangeof +50°Fto+104°F (+10°Cto+40°C).Themaximumoperating
relativehumidityis80%.
Never place the unit in a location where excessive heat, moisture, or
corrosive materials are present.
Theunit hasanair-cooled refrigerationsystem. Air isdrawn throughthe
frontpaneland dischargedthroughthe rearpanel.The unitmustbe
positioned so the air intake and discharge are not impeded. A minimum
clearance of 12 inches (30 centimeters) at the front and rear of the unit is
necessaryforadequateventilation.Inadequateventilationwillreduce
cooling capacity and, in extreme cases, can cause compressor failure.
Excessivelydusty areasshould beavoided anda periodiccleaning schedule
shouldbeinstituted (seeSectionIV, CondenserCleaning).
Using 20°C water as a bath fluid, 115/60 units will retain their full rated capac-
ity in ambient temperatures up to +20°C. Reduce the cooling capacity approxi-
mately15watts forevery1°Cabove+20°C,toamaximumambienttempera-
tureof +40°C. For230/50 units, reducethecooling capacityapproximately18
watts for every 1°C. Lower reductions in cooling capacity occur as the bath
fluidtemperatureincreases.
Installation and Operation
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Electrical
Requirements The unit construction provides protection against the risk of electrical
shock by grounding appropriate metal parts. The protection may not
function unless the power cord is connected to a properly grounded
outlet. It is the user's responsibility to assure a proper ground connec-
tion is provided.
We recommend the use of a dedicated outlet.
Refer to the serial number label on the rear of the unit to identify the specific
electricalrequirementsofyourunit. Ensurethevoltageofthe powersource
meetsthespecifiedvoltage, ±10%.
TheRTE-7isnotdesignedtobeusedbeyondthevoltagerangeorhave
momentarypowerinterruptions.Installan“un-interruptiblepowersupply”ora
line loss detection method.
All units are:
PollutionCategory2
OvercurrentProtectionII
Thefollowingpoweroptionsareavailable:
Unit Amps1Breaker Power Inlet
RTE7 115/60/1 12 15A IEC320-C-13
100/50-60/1 12 15A IEC320-C-13
230/50/1 12 15A IEC320-C-19
RTE10 115/60/1 12 15A IEC320-C-13
100/50-60/1 12 15A IEC320-C-13
230/50/1 12 15A IEC320-C-19
RTE17 115/60/1 16 20A IEC320-C-19
100/50-60/1 16 20A IEC320-C-19
230/50/1 12 15A IEC320-C-19
RTE740 115/60/1 16 20A IEC320-C-19
100/50-60/1 16 20A IEC320-C-19
230/50/1 12 15A IEC320-C-19
Installation and Operation
1. Average Amp draw.
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1. Power cord length, if supplied, is 2 meters.
Unit Type1Amperage Plug Type
115/60/1 15 NEMA5-15
115/60/1 20 NEMA5-20
100/50-60/1 15 NEMA5-15
100/50-60/1 20 NEMA5-20
230/50/1 All CountrySpecific
Installation and Operation
Power Cord Set
230 Volt, 50 Hertz units do not come with a power cord set. To select the
properpowercord,followtheseguidelines:
The cord set must consist of a plug, cable and receptacle.
If the unit is rated greater than 12 Amps, use a cord set rated for 20A.
If the unit is rated less than 12 Amps, use a cord set rated for 15A.
The cord set must be approved by local electrical authority or other
acceptable agency.
Ensure the plug is compatible with your local outlets and receptacles.
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Installation and Operation
Plumbing Requirements Ensure the unit is off before connecting tubing to the unit.
To prevent damage to the plumbing lines, always support the fittings
while installing/removing the pumping caps and lines.
HoseConnections
Thepump connectionsare locatedattherearof thepump boxand arelabelled
(pumpoutlet) and (pumpinlet).Theseconnectionsarebentupward
sothe recirculating fluidwilldrain back intothereservoir when thehoses are
disconnected. Both connections are capped with stainless steel serrated plugs.
Thepump lineshave ¼"MPT formating withstandardplumbingfittings.For
your convenience stainless steel adapters, ¼" FPT to 3/8" O.D. serrated fitting,
areprovided. (Toassureproper fit,they shouldbeinstalled using1½ turnsof
Teflon®tapearoundthethreads.)
Makesure alltubing connectionsaresecurely clamped.Avoid running
tubing near radiators, hot water pipes, etc. If substantial lengths of tubing
are necessary, insulation may be required to prevent loss of cooling capacity.
TubingandinsulationareavailablefromThermo.ContactourSalesDepartment
formoreinformation(seePreface,After-saleSupport).
It is important to keep the distance between the unit and the external system
as short as possible, and to use the largest diameter tubing practical. Tubing
shouldbestraightand without bends. If diameter reductions must be made,
make them at the inlet and outlet of the external system, not at the unit.
Ifsubstantial lengthsofcooling linesare required,theyshould bepre-filledwith
bathfluidbeforeconnectingthem to the unit. This will ensure that an adequate
amount of fluid will be in the bath once it is in operation.
Drain
Ensure the bath fluid is at a safe handling temperature before draining
the unit.
The unit is equipped with a drain located at the back of the unit labelled .
Todrainthereservoirattach a hose to the barb and loosen the fitting.
The fitting has a stop to prevent it from coming off.
Pumping
Thepumpis designed to deliver aflowof 15 liters per minute (4gallonsper
minute)at 0 feethead.To preventexternalcirculation, the pumpinlet and
outletlinesontherear of the unit are capped. The caps must be removed when
externalcirculationisrequired.
Toproperly secureexternalhose connectionsto theunit,wrap Teflon®tape
aroundthe pipelinethreads beforeinstallation. Oncethehose connectionsare
made, the hoses must be properly plumbed to an external system. It is
important the bath is not in operation until all plumbing is complete.
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Circulating to an open container
A stainless steel leveling device is available to aid circulation to an open
vessel.ContactourSalesDepartmentformoreinformation(seePreface).
Supportthelevelingdeviceovertheopencontainerwitharingstand.Stagger
the tubes in the leveling device so one tube is submerged in the vessel fluid,
and the other tube is level with the fluid surface. Connect the deeper tube to
the pump outlet and the shorter tube to the pump inlet.
Adjust the flow rate using the accessory flow control valve connected to the
pump outlet, or by partially restricting the outlet tubing. When properly
adjusted,thepumpinletwill drawanoccasionalairbubble topreventover
flow,and the pumpoutletwill force fluidthrough the submergedtubeto
preventaerationofthevessel.
To avoid siphoning the bath work area when the unit is shut off, lift the
levelingdeviceoutofthevesselandabovetheleveloftheunit.
Circulatingthroughtwoclosed-loops
The pump can be used to circulate through two closed-loop systems. Connect
the shortest practical length of flexible tubing from the pump outlet to the inlet
of external system #1. Connect the outlet of system #1 directly into the bath
work area. Connect tubing from the bath work area to the inlet of system #2.
Connect the outlet of system #2 to the pump inlet.
System #1
System #2
Bath
Work Area
PumpBox
Bath (Top View)
Bath (Rear View) Open Container
Outlet Inlet
Levelling
Device
Installation and Operation
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Installation and Operation
Fluids The user is always responsible for the fluid used. Never use flammable
or corrosive fluids with this unit. The use of chlorine or sodium
hypochlorite in the baths will cause pitting that could leave to failure of
the refrigeration system.
Handling and disposal of liquids other than water should be done in
accordance with the fluid manufacturers specification and/or the MSDS
for the fluid used.
Forfluidselectionconsiderapplicationrequirements,operatingtemperature
range,materialcompatibility, safetyconcerns,andenvironmentalissues.
Wetted materials of bath include; 316 and 304 Stainless steels, Ryton® (PPS),
Teflon®(PTFE)andEthlyene-Propylenerubber(EPDM).
Deionized(upto18Meg-ohm/cm)anddistilledwaterarerecommendedto
controlcorrosion andalgaebloom. SeeWater Quality Standardsand Recom-
mendationinAppendix A.
Ethylene glycol, propylene glycol, silicone oil, and filtered water are acceptable
fluids.
NOTE: Kinematic viscosity of the selected fluid should not exceed 50
centistokesat the lowestoperatingtemperature.
Pleasecall Thermo customerserviceto discuss highand low temperaturefluid
selections.However, wewilloften referyouto chemicalcompaniesspecializ-
ingin heat transferfluids.
Filling
Requirements Ensure the drain on the back of the unit is closed before filling the unit.
Thebath workarea hasahigh andlow levelmarkertoguidefilling. The
markers are 1 inch horizontal slits located in the center of the stainless steel
baffleseparatingthe workareaandthepump assembly.Thecorrect fluid
levelfallsbetweenthesetwomarkers.
NOTE:Theunitis equippedwithareservoir levelfloatswitch.Theswitch
prevents the unit from starting if the fluid is below the lower slit.
When pumping to an external system, keep extra fluid on hand to maintain
the proper level in both the circulating lines and the external system.
Avoid overfilling, fluids expand when heated.
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Controller
(DigitalOne/DigitalPlus) ThecontrollercontrolstemperatureusingaProportional-Integral-Derivative
(PID)algorithm.Itisdesigned with self-diagnostic features and easy to use
operatorinterface.Twocontrolleroptionsareavailable:DigitalOneandDigital
Plus.The information onthe following twopages appliestoboth controllers.
ON/OFF. Use this key to toggle the unit on or off and to clear error mes-
sages.
SCROLL. Use this key to scroll through the controller's LEDs. It is also
used to save new changes.
YES/ARROW. Use this key to increment numerical values when setting
valuesandto accept new settings.
NO/ARROW. Use this key to decrement numerical values when setting
valuesandto abort new settings.
Indicatesrefrigerationsystemstatus.Itilluminatestoindicatetherefrigeration
system is removing heat from the bath fluid. The indicator is off when heat is not
beingremoved.
Indicates heater status.It illuminates to indicate theheater isadding heat from
thebath fluid. The indicatorisoff when heat is not being added.
DigitalOneController
Yes
No
Installation and Operation
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Installation and Operation
NOTE: Thefollowingindications are not visible until is depressed.
Setpoint. Indicates the controller is displaying the current setpoint.
Low Temperature Alarm. Indicates the controller is displaying the current
lowtemperaturealarm.
High Temperature Alarm. Indicates the controller is displaying the current
hightemperaturealarm.
Toadjust thedisplayedvalue usethe arrowbuttons.Pressing anarrowbutton
will cause the display to stop flashing and to indicate the new setpoint value.
SavethechangebypressingSCROLL.Thenewsetpointvaluewillrapidlyflash
fortwo cycles andthen the controllerwillreturn tothereservoir fluidtempera-
ture display.
If SCROLL is not pressed within 60 seconds the change will time out and revert
tothe originalsetpoint.The controllerwill automaticallyreturnto thereservoir
fluidtemperaturedisplay.
NOTE: Youcannot adjust the setpoint closerthan0.1°C of either temperature
limit, and you can not adjust either temperature limit within 0.1°C of the
setpoint. Trying to do so will cause the indicator to flash and, on Digital Plus
controllers, the alarm to beep.
On units with the Digital Plus controller, pressing the Mute button prior to
pressingSCROLLwillabortanychangesandreturntothe reservoirfluid
temperaturedisplay.
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