Thermo Scientific Locator User manual

LOCATO ®& LOCATO Plus
Cryobiological Storage Vessel
OPERATION MANUAL
AND PARTS LIST
TYPE CY50900
Liquid Nitrogen Level Monitor
OPERATION MANUAL
AND PARTS LIST
TYPE CN50900
LT509X9 • 10/19/09

2
Safety Information ..................................................................................................................................3
Alert Boxes ........................................................................................................................................3
Please Read ......................................................................................................................................3
General Usage ..................................................................................................................................3
Warnings ................................................................................................................................................4
General Specifications ..........................................................................................................................5
Environmental Conditions ..................................................................................................................5
Declaration of Conformity ..................................................................................................................6
Unpacking ..............................................................................................................................................7
Operation................................................................................................................................................8
illing Instructions ..............................................................................................................................8
Measuring Liquid Nitrogen Quantity ..................................................................................................8
Storing Samples in Vapor Phase ......................................................................................................9
General Cleaning Instructions............................................................................................................9
Replacement Parts ..............................................................................................................................10
LOCATOR Accessories ........................................................................................................................12
Accessory Liquid Nitrogen Level Monitor Operation............................................................................13
Intended Use....................................................................................................................................13
General Usage ................................................................................................................................13
unction ..........................................................................................................................................13
Installation Procedure ......................................................................................................................13
Level Monitor Remote Alarm ..........................................................................................................13
Connection to Remote Alarms ........................................................................................................14
Liquid Nitrogen Level Monitor’s Alarm Contact Specifications ........................................................14
Principles of Operation ....................................................................................................................15
Microprocessor unction..................................................................................................................15
Audible and Visual Alarms ..............................................................................................................16
Safety eature ................................................................................................................................16
Operation of Level Monitor ..............................................................................................................17
Liquid Nitrogen Level Monitor Troubleshooting....................................................................................19
Level Monitor Replacement Parts List and Accessories......................................................................19
Ordering Procedures ............................................................................................................................20
Warranty ..............................................................................................................................................24
Table of Contents

3
Safety Information
Your Thermo Scientific LOCATOR and LOCATOR Plus
Series have been designed with function, reliability and
safety in mind. or safe operation, please pay attention
to the alert signals throughout the manual.
Please Read
All cryopreservation vessels, regardless of who manu-
factures them, use a vacuum to provide the super insu-
lative properties needed to keep nitrogen in a liquid
form. They are very similar, in fact, to the thermos ves-
sels you may have used to store coffee, soup or milk.
Remember how fragile they were? Since no vacuum is
perfect or will last forever, we suggest that you monitor
the consumption of liquid nitrogen used by your vessel
on a regular basis, i.e. every 1-2 days. By monitoring,
you may be able to anticipate subtle changes in con-
sumption and possibly react to problems before they
arise. You may opt to use a level monitor for this pur-
pose. (See page 13 for level monitor operation.).
Also, if your samples are super critical, one-of-a-kind, or
irreplaceable, consider allocating your samples to 2 sep-
arate vessels. Remember the old adage about placing
all your eggs into one basket….
inally, because no vacuum will last forever, consider
having your vessel tested by the manufacturer or a qual-
ified cryovessel service technician every 7-10 years,
regardless of any problems (or lack thereof) you may
have had in the past. This will help insure your samples
against sudden loss of nitrogen due to vacuum failure.
General Usage
Do not use this product for anything other than its in-
tended usage.
Use of the equipment in a manner not specified by the
manufacturer may impair the protection provided by the
equipment.
Safety Information
Alert Signals
Warning
Warnings alert you to a possibility of
personal injury.
Caution
Cautions alert you to a possibility of
damage to the equipment.
Note
Notes alert you to pertinent facts and
conditions.

4
WA NING
• Liquid Nitrogen is extremely cold; it boils at -196°C.
• To avoid injury due to frostbite or ruptured vials use extreme care whenever handling liquid nitrogen, liq-
uid nitrogen storage or transfer vessels, or any objects which have come in contact with liquid nitrogen.
• Leave no areas of skin exposed.
• Always wear proper safety attire over clothing: face shield, cryogenic gloves, cryogenic apron.
• Do not tightly seal liquid nitrogen containers or prevent nitrogen gas from escaping.
• Always handle ampules with tongs. They may explode when removed from the vessel.
• Use extreme care to prevent spilling and splashing liquid nitrogen during transfer and removal of storage
contents and holders.
• Immediately remove any clothing or safety attire on which liquid nitrogen has been spilled or splashed.
• Get immediate medical attention for any frostbite injuries due to liquid nitrogen.
Warning
Caution
• Never overfill liquid nitrogen ves-
sels. Liquid nitrogen level should
never be above the tops of the
racks inside the vessel. The excess
weight may crack the neck and
result in vacuum failure.
• When inserting or removing
racks be careful not to come in
contact with the neck tube area
of the vessel. emove or insert
racks slowly in a vertical manner.
Scratches on the neck tube area
can cause premature vacuum fail-
ure.
•Do not tamper with or remove
vacuum port (covered by a black
plastic cap on side of vessel); this
will void warranty.
• Do not spill liquid nitrogen on vacu-
um port - this can cause vacuum
failure.
• Always keep liquid nitrogen vessel
in an upright position.
• Do not use this LOCATOR vessel
for transport.

5
General Specifications
LOCATO LOCATO LOCATO LOCATO LOCATO LOC ATO LOCATO
4 4 PLUS 6 PLUS 8 8 PLUS J . J . PLUS
HEIGHT 37.5” 40” 38” 37.5” 40” 27.5” 30”
(Including lid)1(95.25 cm) (101.6 cm) (96.5 cm) (95.25 cm) (101.6 cm) (69.85 cm) (76.2 cm)
DIAMETE 22” 22” 26” 22” 22” 22” 22”
(55.8 cm) (55.8 cm) (55.8 cm) (55.8 cm) (55.8 cm) (55.8 cm) (55.8 cm)
VESSEL 110L 111L 165L 110L 111L 50L 51L
VOLUME
LN290L 91L 134L 90L 91L 40L 41L
CAPACITY,
LIQUID PHASE
STO AGE
VAPO PHASE 25L 26L 39L 25L 26L 20L 21L
LN2CAPACITY
STATIC LN2.65 .80 .80 .40 .58 .65 .80
EVAPO ATION
ATE - L/DAY
LIQUID PHASE 2916 3240 4860 1800 2000 1296 1620
CAPACITY ampules* ampules* ampules ampules ampules ampules* ampules*
(Ampules actually or 3600 or 4000 or 6000 or 1600 or 2000
submerged in liquid ampules** ampules** ampules** ampules** ampules**
nitrogen)
VAPO PHASE 2268 2592 3888 1400 1600 972 ampules* 1296
CAPACITY ampules* ampules* or ampules* or ampules ampules or 1200 ampules*
(Ampules are kept or 3200 4800 ampules** or 1600
slightly above the 2800 ampules** ampules** ampules**
level of liquid nitrogen.) ampules**
1The liquid nitrogen level monitor will add 1 inch to these heights. The transportation cart will add 4 inches to
these heights.
* Using Nalgene cryoboxes with a 9 x 9 ampule configuration.
** Using Nalgene System 100 cryoboxes with a 10 x 10 ampule configuration. (Nalgene System 100 ampules or
equivalent are needed.)
Environmental Conditions
Operating: 17°C - 27°C; 20% to 80% relative humidity, 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 to 65°C; 10% to 85% relative humidity.
Locator and Locator Plus units are intended for indoor use only.

6
(CE models only) We hereby declare under our sole responsibility that this product conforms with the technical
Units with electronic level monitor conform with the technical requirements of the following standards:
EMC: EN 61000-3-2 Limits for Harmonic Current Emissions
EN 61000-3-3 Limits for Voltage luctuations and licker
EN 61326-1 Electrical Equipment for Measurement, Control, and Laboratory Use; Part I:
General Requirements
Safety: EN 61010-1 Safety Requirements for Electrical Equipment for Measurement, Control and
Laboratory Use; Part I: General Requirements
per the provisions of the Electromagnetic Compatibility Directive 2004/108/EC, and per the provisions of the
Low Voltage Directive 2006/95/EC.
The authorized representative located within the European Community is:
Electrothermal House
Unit 12A
Purdeys Industrial Estate
Purdys Way
Rochford, Essex SS4 1ND
United Kingdom
Tel: [phone]
Copies of the Declaration of Conformity are available upon request.
Cryogenics Dewars (liquid nitrogen containers) meet the requirements of Annex V Medical Devices Directive
93/42/EEC
EC Certificate - CE 00127
Declaration of Conformity

7
Before using your new LOCATOR or LOCATOR Plus
vessel, carefully inspect the vessel prior to use. Check
for signs of damage which may have occurred in ship-
ment. It is advisable to fill (see filling instructions) all new
units with liquid nitrogen and watch liquid nitrogen loss
rate for a few days. If there are any problems, call
Customer Srevice as soon as possible.
The warranty registration card enclosed with the vessel
must be completed and returned to the factory within 30
days to make warranty effective. This information must
include the serial number, which is located on the label
on the vessel.
Unpacking
Note
The most prevalent cause of failure of
liquid nitrogen storage vessels is me-
chanical. The vessel neck tube sup-
ports the full weight of the inner shell
and all the liquid nitrogen it contains. A
side blow to the vessel causes the in-
ner shell to swing in a pendulum-like
motion causing the neck tube to be
damaged. Any storage vessel which
has been in an accident, has been
dropped or lowered to hit on its side
will tend to fail more rapidly than one
which has not.
Caution
Exercise caution when moving your
LOCATOR or LOCATOR Plus vessel.
LOCATOR and LOCATOR Plus cryobi-
ological storage systems are not
transportation vessels. Transport
carts are designed for mobility within
the lab or lab to lab only. Moving full
vessels long distances, over cracks in
floor, thresholds, on inclined ramps or
in elevators can cause premature vac-
uum failure.
Note
If you must transport samples under
cryogenic conditions, consider the Arc-
tic Express line of Dry Shippers avail-
able from Thermo Scientific.

8
illing Instructions
To avoid damage to your LOCATOR or LOCATOR Plus
cryogenic storage vessel which may result in premature
vacuum loss, it is important that the following procedure be
used when adding liquid nitrogen to a warm vessel:
1. Add only a small amount of liquid nitrogen (5-10 liters)
to a new or warm vessel.
2. Allow this small amount of liquid nitrogen to sit in the
covered vessel for a minimum of 2 hours. This will limit
stress caused by the sudden temperature change as-
sociated with adding liquid nitrogen to a warm vessel.
3. Add an additional 15 liters of liquid nitrogen to the ves-
sel.
4. Allow vessel to sit for 48 hours and monitor liquid nitro-
gen consumption with a wooden yardstick or Level
Monitor.
5. ill LOCATOR or LOCATOR Plus as indicated. (See
Caution at left.) Remember to allow for displacement
of liquid nitrogen when racks and boxes are inserted.
6. Insert and remove racks slowly. Allow liquid nitrogen to
run out of boxes and off of racks.
Measuring Liquid Nitrogen
Quantity
1. Use a wooden yardstick to measure liquid nitrogen lev-
el. NEVE use a hollow tube or plastic dipstick to mea-
sure the liquid nitrogen level.
2. Level will be indicated by frost line which develops
when dipstick is removed.
3. Level Monitor can be used for constant measurements.
See page 14.
Operation
Caution
• Never overfill your LOCATOR or
LOCATOR Plus vessel with liquid
nitrogen. The liquid nitrogen level in
your tank (with racks inserted)
should never be above 20 inches
(50 cm) for LOCATOR 4 and LOCA-
TOR 8, 10 inches (25 cm) for
LOCATOR Jr., 22 inches (55.8 cm)
for LOCATOR 4, 6 and 8 Plus and
12 inches for LOCATOR Jr. Plus.
illing the tank up to or above the
bottom of the neck tube may cause
immediate or premature vacuum
failure to occur.
• When inserting or removing racks,
be careful not to come in contact
with the neck tube area of the ves-
sel. Remove or insert racks slowly
in a vertical manner. Scratches on
the neck tube area can cause pre-
mature vacuum failure.
• Do not spill liquid nitrogen on vacu-
um port (covered by a black plastic
cap on side of vessel) - this can
cause vacuum failure.

9
Storing Samples in Vapor
Phase
1. Remove the 2 bottom-most cryoboxes from each
rack.
2. Measure the height of 2 cryoboxes stacked on top of
each other.
3. ill vessel with liquid nitrogen to the height obtained
from step 2 using a yardstick to measure liquid level
in vessel.
4. Place racks into vessel without the 2 bottom-most
cryoboxes.
— Samples are now above the liquid nitrogen and are
stored in the vapor phase.—
Important—A level monitor should always be used when
you store your samples in the vapor phase because of
the already low levels of liquid nitrogen. Please refer to
page 10 for the correct level monitor for your system.
General Cleaning Instructions
Wipe exterior surfaces with lightly dampened cloth con-
taining mild soap solution.
Model # Description – For Standard
Covers Only
CV509X12A Replacement cork and glue for
OPE ATION

10
Model # Description - For Standard Covers Only
CV509X12A Replacement cork and glue for LOCATOR 4, LOCATOR 4 Plus, Jr. and Jr. Plus
CV509X11A Replacement cork and glue for LOCATOR 8 and LOCATOR 8 Plus
CV509X41A-70 Replacement cork and glue for LOCATOR 6 Plus
ADX31 Glue for corks
LOCATO and LOCATO Plus Vessels and Covers
TANK ONLY
No Racks STANDARD COVERS W/LEVEL MONITOR
TYPE or covers COVERS
LOCATOR JR. CS509X11A CV509X10 CN509X1
LOCATOR JR.
Plus CS509X20A-70 CV509X10 CN509X1-70
LOCATOR 4 CS509X12A CV509X10 CN509X4
LOCATOR 4
Plus CS509X21A-70 CX509X10 CN509X4-70
LOCATOR 6
Plus CS509X22A-70 CV509X40-70 CN509X11-70
LOCATOR 8 CS509X13A CV509X9 CN509X7
LOCATOR 8
Plus CS509X23A-70 CV509X9 CN509X7-70
All level monitors listed operate on 15Vdc (+/- 10%) 0.2 amps 3.0 Watts.
Replacement Parts
Note
LOCATOR and LOCATOR Plus ves-
sels include racks and covers. Howev-
er, these items may also be ordered
separately.
Note
Cork and glue cannot be replaced on covers with level monitor or level monitor will malfunction.
Contact Customer Service for return authorization to send cover in for repair.
Japan, North/South America, Europe 100-240Vac
CHINA
CN509X1CN
CN509X1-70CN
CN509X4CN
CN509X4-70CN
CN509X7CN
CN509X7-70CN

11
LOCATO and LOCATO Plus acks and Boxes
STANDARD RACK SPECIAL RACK
TYPE (1.8 ml VIALS) (5.0 ml VIALS)
RACK 1.8 ml 1.8 ml RACK 5.0 ml
PART NO. 81 or 100 25 AMPULE PART NO. 81 AMPULE BOX
AMPULE BOX BOX
LOCATOR JR. HR509X15A CS509X15 X HR509X19A CS509X10
4/VESSEL 16/VESSEL 4/VESSEL 8/VESSEL
4/RACK 2/RACK
LOCATOR JR. HR509X15A-70 CS509X15 X HR509X19A-70 CS509X10
PLUS 4/VESSEL 20/VESSEL 4/VESSEL 8/VESSEL
5/RACK 2/RACK
LOCATOR 4 HR509X2A CS509X15 X HR509X20A CS509X10
4/VESSEL 36/VESSEL 4/VESSEL 20/VESSEL
9/RACK 5/RACK
LOCATOR 4 HR509X2A-70 CS509X15 X HR509X20A-70 CS509X10
PLUS 4/VESSEL 40/VESSEL 4/VESSEL 20/VESSEL
10/RACK 5/RACK
LOCATOR 6 HR509X31A-70 CS509X15 X HR509X32A-70 CS509X10
PLUS 6/VESSEL 60/VESSEL 6/VESSEL 30/VESSEL
10/RACK 5/RACK
LOCATOR 8 HR509X1A X CS509X16 XX
8/VESSEL 72/VESSEL
9/RACK
LOCATOR 8 HR509X1A-70 X CS509X15 XX
PLUS 8/VESSEL 80/VESSEL
10/RACK
EPLACEMENT PA TS

12
AY509X33 1.5 ml cryoampules (500 per case) for System 100 boxes
AY509X32 1.0 ml cryoampules (500 per case) for System 100 boxes
AY509X12 2.0 ml cryoampules (500 per case) will not fit in System 100 boxes
AY509X13 1.2 ml cryoampules (500 per case) will not fit in System 100 boxes
CS509X5 Nalgene plastic boxes, (case of 20) holds 81 ampules per box. or use with LOCATOR Jr.,
LOCATOR Jr. Plus, LOCATOR 4, LOCATOR 4 Plus and LOCATOR 6 Plus.
CS509X4 Nalgene plastic boxes, (case of 40) holds 81 ampules per box. or use with LOCATOR Jr.,
LOCATOR Jr. Plus, LOCATOR 4, LOCATOR 4 Plus and LOCATOR 6 Plus.
CS509X3 Nalgene plastic boxes, (case of 80) holds 25 ampules per box. or use with LOCATOR 8 and
LOCATOR 8 Plus
CS509X10 Nalgene plastic 4" box for 5 ml ampules. Holds 81 ampules per box. ( its LOCATOR 4, LOCA-
TOR 4 Plus, LOCATOR Jr. and LOCATOR Jr. Plus.) Requires special rack, see p. 11.
CS509X24 Nalgene plastic boxes (System 100) for use with System 100 ampules or equiv., cases of 10.
AY509X1 Transportation cart (fits LOCATOR Jr., LOCATOR Jr. Plus, LOCATOR 4, LOCATOR 4 Plus,
LOCATOR 8, and LOCATOR 8 Plus.)
AY509X1-70 Transportation cart ( or use with LOCATOR 6 Plus.)
AY509X18 Cryoclaw (AY509X19 Suction Cups(2) used to remove floating ampules and boxes)
LT509X5 Logbook for LOCATOR 4, LOCATOR 4 Plus, LOCATOR Jr. and LOCATOR Jr. Plus
LT509X6 Logbook for LOCATOR 8 and LOCATOR 8 Plus
LOCATOR Accessories

13
Accessory Liquid Nitrogen Level
Monitor Operation
Intended Use
Provides a constant indication of liquid nitrogen level and
alerts you to low level conditions through audible and visual
alarms. The accessory Liquid Nitrogen Level Monitor can
be wired to a remote alarm system, to alert you to problems
when you are not in your laboratory.
General Usage
Do not use this product for anything other than its intended
usage.
Function
Safeguards your precious samples by informing you when
your vessel needs filling and alerting you to excessive liquid
nitrogen loss conditions.
Installation Procedure
1. Remove the level monitor and LOCATOR or LOCA-
TOR Plus cover from box.
2. Remove present cover from your LOCATOR or
LOCATOR Plus and replace with your new level
monitor and cover.
3. Check the electrical specifications on the power
supply for electrical data and plug into appropriately
grounded receptacle.
Level Monitor emote Alarm
1. Disconnect the Liquid Nitrogen Level Monitor from
the power supply. Disconnect power to your alarm
system.
2. Remove the three screws securing the Liquid Nitro-
gen Level Monitor’s cover. Pull the cover up and
out of the way. (See igure 1.)
Accessory Liquid Nitrogen
Level Monitor Operation
Note
If the level monitor was purchased as
part of a LOCATOR or LOCATOR Plus
system, skip to step #3. If it is a retrofit
for an existing LOCATOR or LOCA-
TOR Plus, begin with step #1.
Note
Level monitor is shipped mounted di-
rectly to the appropriate LOCATOR or
LOCATOR Plus cover.
Note
The equipment is intended to be oper-
ated with an external power supply
provided by the manufacturer.
Note
The level monitor is designed for use
with Thermo Scientific Liquid Nitrogen
vessels only.

14
Connection to emote Alarms
When connected to your remote alarm system, the Liquid
Nitrogen Level Monitor will alert you to a problem even
when your laboratory is unoccupied. The Liquid Nitrogen
Level Monitor’s alarm contacts are activated at the same
time the Monitor’s audible alarm sounds (see Micropro-
cessor Functions).
3. Remove the black plug from the side of the
cover. Insert the wires for the remote alarm
through this hole.
4. Connect the remote alarm wires as shown in
igures 1, 2 and 3.
5. Replace the Liquid Nitrogen Level Monitor’s
cover. Resupply power to the Liquid Nitrogen
Level Monitor and to your remote alarm sys-
tem.
Liquid Nitrogen Level Monitor’s Alarm
Contact Specifications
The Liquid Nitrogen Level Monitor’s alarm contact is a
Photomos type relay.
Contact orm: Type 1 form B
Load Voltage Maximum: 24 Vdc Max
Load Current Maximum: 120 mA
Typical On Resistance: Maximum 26 Ω
ACCESSO Y LIQUID NIT OGEN LEVEL MONITO OPE ATION
1
1
1
For normally closed contact, place jumper here.
For normally open contact, place jumper here.
Remote Alarm wires connect here
(Note polarity.)
-+
J3
J4 J6
Note
The Liquid Nitrogen Level Monitor can
be configured to present your alarm
system with either a normally open
contact or a normally closed contact.
Which mode is currently operative de-
pends on the placement of a single
jumper on the circuit board. or a nor-
mally open contact, the jumper should
be placed on J6. or a normally
closed contact, the jumper should be
placed on J4. (See igure 2) Verify
that the jumper is set appropriately
for your remote alarm system.
Figure 1 Figure 2

15
Principles of Operation
The innovative LIQUID NITROGEN LEVEL MONITOR from
Thermo Scientific utilizes ultrasonic sound waves to sense
the level of liquid nitrogen inside a or LOCATOR Plus cryo-
genic storage vessel. A microprocessor control provides
continuous indication of the liquid nitrogen level inside the
LOCATOR or LOCATOR Plus. Audible and visual alarms
also provide an early warning of low level conditions.
ULTRASONIC sound waves sense the level of liquid nitro-
gen inside the LOCATOR or LOCATOR Plus vessel.
By using ultrasonic sound waves to sense the level of liq-
uid nitrogen, no physical probe is required to sense the
level of liquid nitrogen. Conventional devices use probes
which must be in physical contact with the liquid. This
physical contact increases liquid nitrogen consumption.
There is NO increase in liquid nitrogen consumption by
using the Thermo Scientific LEVEL MONITOR.
Microprocessor Functions
5 segment LED indication of the liquid nitrogen level
The LED display is graduated in 5 segments; ull, 3/4, 1/2,
1/4 and Empty, similar to a fuel gauge on an automobile.
The bright orange LED display provides quick and reliable
visual indication of the level of liquid nitrogen inside the
LOCATOR or LOCATOR Plus vessel.
ACCESSO Y LIQUID NIT OGEN LEVEL MONITO OPE ATION
1
2
36
5
4
Load
J3-2
J3-1
U4
VLoad Voltage
(DC)
L
Remote Alarm Connections Schematic
The position of J4 and J6 indicate
whether the relay is normally open
or normally closed.

16
Audible and Visual Alarms
1. “LOW LEVEL” indicator light flashes on and
off when 2" of liquid nitrogen remains inside
the LOCATOR or LOCATOR Plus vessel. In
this situation, the level of liquid nitrogen is
low, and you are alerted to refill the vessel as
soon as possible.
2. An AUDIBLE alarm will sound intermittently
when 1" of liquid nitrogen remains inside the
LOCATOR or LOCATOR Plus vessel. The
“LOW LEVEL” light described above will con-
tinue to flash as well. In this situation, the liq-
uid nitrogen is dangerously low, and you are
alerted to refill the vessel immediately.
3. The 5 segment LED display becomes lit and
an audible alarm sounds continuously when
the LOCATOR or LOCATOR Plus vessel has
no more liquid nitrogen or if the level inside
the vessel is falling at a rate of 1/2" per hour
or more. In this situation, you are alerted that
an emergency exists. Either there is no more
liquid nitrogen inside the LOCATOR or
LOCATOR Plus vessel, or the level of liquid
nitrogen is dropping rapidly, due to a vacuum
failure of the LOCATOR or LOCATOR Plus
vessel.
Safety Feature
A “RESET” switch lights and an audible alarm sounds
intermittently if the user does not reset the monitor after
removing vessel cover. The microprocessor must be
reset each time the cover is removed from the LOCA-
TOR or LOCATOR Plus.
Before removing the cover, the ESET button must
be pushed, illuminating the RESET light. While in this
reset/hold mode, the monitor is not sensing. After five
minutes in the reset/hold mode, an audible alarm will
sound, alerting you to deactivate the reset/hold mode
and replace the cover on the vessel.
ACCESSO Y LIQUID NIT OGEN LEVEL MONITO OPE ATION

17
Operation of Level Monitor
Once the cover with the monitor has been placed on the
vessel and plugged in, it will take the system about 15 min-
utes to equilibrate before an accurate measurement of the
liquid nitrogen will be indicated. This equilibration process
will occur each time the vessel is used. Each time a vessel
is opened, the stabilized chamber temperature is disrupted.
The system requires a stable temperature to determine an
accurate liquid nitrogen level.
If you have just purchased a new LOCATOR or LOCATOR
Plus along with your monitor, allow at least 1 day for the liq-
uid nitrogen to equilibrate the vessel before plugging in the
unit. This will avoid false alarms.
ACCESSO Y LIQUID NIT OGEN LEVEL MONITO OPE ATION
Note
The Level Monitor may take up to 10
minutes to establish a reading after
the unit is placed on the cryovessel.
Remember to press “Reset” after plac-
ing unit on the vessel. The green LED
on the switch should be “O .”

18
Problem Cause Solution
Level monitor alarm sounds Ice or frost buildup on the Remove level monitor from vessel
intermittently. Unit measuring transducer. and place in room for approximately
liquid level incorrectly. twenty minutes. Make sure lid is
standing upright on the cork to allow
moisture to drain out of level monitor.
Place level monitor back on unit.
(Remember to press “Reset” button.)
Level monitor measuring “ ull” og in top part (neck area) of The density of the fog that is formed
after removing samples and cryogenic vessel. after removing the lid and accessing
replacing lid. samples is dependent on the humidity
of the room where the cryovessel is
found. The fog dissipates after about
fifteen minutes and at this time the
level monitor will take an accurate
reading of the liquid nitrogen level.
Liquid Nitrogen Level Monitor
Troubleshooting

19
Level Monitor Replacement
Parts List and Accessories
PA T LOCATO LOCATO LOCATO LOCATO LOCATO LOCATO LOCATO
J J PLUS 4 4 PLUS 6 PLUS 8 8 PLUS
Liquid Nitrogen CN509X1 CN509X1-70 CN509X4 CN509X4-70 CN509X11-70 CN509X7 CN509X7-70
Level Monitor CN509X1CN**** CN509X1-70CN**** CN509X4CN****CN509X4-70CN**** CN509X7CN**** CN509X7-70CN****
1. *Transducer CV509X21B CV509X21B CV509X21B CV509X21B CV509X21B CV509X20B CV509X20B
2. P.C. Board
(Bottom Board) PC509X1A PC509X4A PC509X3A PC509x5A PC509X5A PC509X3A PC509X5A
3. Display Board
(Top Board) PC509X2B PC509X2B PC509X2B PC509X2B PC509X2B PC509X2B PC509X2B
4. Single bar
LED SCX113 SCX113 SCX113 SCX113 SCX113 SCX113 SCX113
5. our Bar
LED SCX114 SCX114 SCX114 SCX114 SCX114 SCX114 SCX114
6. Cover CV509X13 CV509X13 CV509X13 CV509X13 CV509X13 CV509X13 CV509X13
7. Power
Supply/90-240Vac TN509X2 TN509X2 TN509X2 TN509X2 TN509X2 TN509X2 TN509X2
8. Power
Supply/100V ****China (PRC) models use TNX136
*Will include cover, cork, transducer and aluminum bottom of control section. Does not include items 2-9 list-
ed above.

20
Ordering Procedures
Please refer to the Specification Plate for the complete
model number, serial number, and series number when
requesting service, replacement parts or in any corre-
spondence concerning this unit.
All parts listed herein may be ordered from the Thermo
Scientific dealer from whom you purchased this unit or
can be obtained promptly from the factory. When service
or replacement parts are needed we ask that you check
first with your dealer. If the dealer cannot handle your
request, then contact our Customer Service Department
at 563-556-2241 or 800-553-0039.
Prior to returning any materials, please contact our
Customer Service Department for a “Return Materials
Authorization” number (RMA). Material returned without
an RMA number will be refused.