ORTEC CryoSecure User manual

CryoSecure™
Compressor Power Controller
Hardware Manual
Printed in U.S.A. ORTEC®Part No. 774890 1209
Manual Revision D

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Advanced Measurement Technology, Inc.
a/k/a/ ORTEC®, a subsidiary of AMETEK®, Inc.
WARRANTY
ORTEC* warrants thatthe items will bedeliveredfree from defects inmaterial orworkmanship. ORTEC makes no other
warranties, express or implied, and specifically NO WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE.
ORTEC’sexclusiveliabilityislimitedtorepairingor replacingatORTEC’s option,items foundbyORTECtobedefective
in workmanship or materials within one year from the date of delivery. ORTEC’s liability on any claim of any kind,
includingnegligence,loss,ordamagesarisingoutof,connectedwith,orfromtheperformanceorbreachthereof,orfrom
the manufacture, sale, delivery, resale, repair, or use of any item or services covered by this agreement or purchase
order, shall in no case exceed the price allocable to the item or service furnished or any part thereof that gives rise to
the claim. In the event ORTEC fails to manufacture or deliver items called for in this agreement or purchase order,
ORTEC’s exclusive liability and buyer’s exclusive remedy shall be release of the buyer from the obligation to pay the
purchase price. In no event shall ORTEC be liable for special or consequential damages.
Quality Control
Beforebeingapproved for shipment,eachORTECinstrumentmust passastringentsetofqualitycontroltestsdesigned
to expose anyflaws in materials or workmanship. Permanent records of these tests are maintained for use in warranty
repair and as a source of statistical information for design improvements.
Repair Service
If it becomes necessary to return this instrument for repair, it is essential that Customer Services be contacted in
advanceofitsreturnsothataReturnAuthorizationNumbercanbeassignedtotheunit.Also,ORTECmustbeinformed,
either in writing, by telephone [[phone]] or by facsimile transmission [[phone]], of the nature of the fault
of the instrument being returned and of the model, serial, and revision ("Rev" on rear panel) numbers. Failure to do so
may cause unnecessary delays in getting the unit repaired. The ORTEC standard procedure requires that instruments
returned for repair pass the same quality control tests that are used for new-production instruments. Instruments that
are returned should be packed so that they will withstand normal transit handling and must be shipped PREPAID via
Air Parcel Post or United Parcel Service to the designated ORTEC repair center. The address label and the package
should include the Return Authorization Number assigned. Instruments being returned that are damaged in transit due
to inadequate packing will be repaired at the sender's expense, and it will be the sender's responsibility to make claim
with the shipper. Instruments not in warranty should follow the same procedure and ORTEC will provide a quotation.
Damage in Transit
Shipments should be examined immediately upon receipt for evidence of external or concealed damage. The carrier
making delivery should be notified immediately of any such damage, since the carrier is normally liable for damage in
shipment. Packing materials, waybills, and other such documentation should be preserved in order to establish claims.
After such notification to the carrier, please notify ORTEC of the circumstances so that assistance can be provided in
making damage claims and in providing replacement equipment, if necessary.
Copyright © 2009, Advanced Measurement Technology, Inc. All rights reserved.
*ORTEC®is a registered trademark of Advanced Measurement Technology, Inc. All other trademarks used herein are the
property of their respective owners.

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CONTENTS
SAFETY INSTRUCTIONS AND SYMBOLS ....................................................... iv
SAFETY WARNINGS AND CLEANING INSTRUCTIONS ............................................ iv
1. DESCRIPTION ........................................................................... 2
2. SPECIFICATIONS ........................................................................ 3
2.1. PERFORMANCE ..................................................................... 3
2.2. CONTROLSANDINDICATORS ......................................................... 3
2.3. INPUTS............................................................................. 3
2.4. OUTPUTS........................................................................... 3
2.5. ELECTRICALANDMECHANICAL........................................................ 3
3. INSTALLATIONANDSTARTUP ............................................................. 4
3.1. SWITCHINGON...................................................................... 4
3.2. THEPOWER-ON(“SAFE”)STATE ....................................................... 4
3.3. INSTALLATIONINA“WARM”SYSTEM ................................................... 4
3.4. INSTALLATIONINA“COLD”SYSTEM.................................................... 4
4. OPERATING INSTRUCTIONS ............................................................... 4
4.1. OPERATIONALSTATES............................................................... 4
4.1.1. NormalOperation ............................................................... 4
4.1.2. ACMainsPowerFailure—theHoldingState........................................... 4
4.1.3. TheWarmingState .............................................................. 4
4.1.4. TheCoolingState ............................................................... 5
4.2. SETTINGTHEHOLDINGTIME.......................................................... 5
4.3. SETTINGTHEWARMINGTIME ......................................................... 5
4.4. SETTINGTHECOOLING(BIAS-OFF)TIME................................................ 5
4.5. DEEPDISCHARGEPROTECTION....................................................... 5
5. CALIBRATIONANDMAINTENANCE.......................................................... 6
5.1. TESTMODE......................................................................... 6
5.2. STORAGEANDSHIPPING ............................................................. 6

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DANGER Opening the cover of this instrument is likely to expose dangerous voltages. Disconnect the
instrument from all voltage sources while it is being opened.
WARNING Using this instrument in a manner not specified by the manufacturer may impair the protection
provided by the instrument.
CAUTION To prevent moisture inside of the instrument during external cleaning, use only enough liquid to
dampen the cloth or applicator.
SAFETY INSTRUCTIONS AND SYMBOLS
This manual contains up to three levels of safety instructions that must be observed in order to avoid personal injury
and/or damage to equipment or other property. These are:
DANGER Indicates a hazard that could result in death or serious bodily harm if the safety instruction is not
observed.
WARNING Indicates a hazard that could result in bodily harm if the safety instruction is not observed.
CAUTION Indicates a hazard that could result in property damage if the safety instruction is not observed.
Please read all safety instructions carefully and make sure you understand them fully before attempting to use this
product. In addition, the following symbol may appear on the product:
ATTENTION – Refer to Manual
DANGER – High Voltage
Please read all safety instructions carefully and make sure you understand them fully before attempting to use this
product.
SAFETY WARNINGS AND CLEANING INSTRUCTIONS
Cleaning Instructions
To clean the instrument exterior:
! Unplug the instrument from the ac power supply.
! Remove loose dust on the outside of the instrument with a lint-free cloth.
! Remove remaining dirt with a lint-free cloth dampened in a general-purpose detergent and water solution. Do not
use abrasive cleaners.
! Allow the instrument to dry completely before reconnecting it to the power source.

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1
NOTE
The internal timers switches are set at the factory
for a specific system including a detector and an
EC-III cooler. The CryoSecure cannot be switched
from one detector system to another without
assistance from ORTEC service personnel.
ORTEC CRYOSECURE
COMPRESSOR POWER CONTROLLER
1. DESCRIPTION
The ORTEC CryoSecure™ Compressor Power
Controller type is designed to protect low-temperature
solid-state detectors from damage following a mains
powerfailure.TheCryoSecurecontrolsthesequenceof
events to safely return the detector to a normal
operating temperature if the detector has not had time
to warm to a temperature at which it will be damaged if
cooling is restarted. . The CryoSecure is intended to be
used with a cryogenic cooling system such as the
ORTEC EC-III™.
Designed for international use, the CryoSecure can
accommodate input voltages of 100 V ac to 240 V ac at
47 to 63 Hz. A rear-panel connector block incorporates
a fuse holder and the input power connector. The
CryoSecure uses an international standard IEC power
connector to permit the use of power cords and plugs
that meet local electrical standards. Output to the
compressor is provided via a mating connector on the
rear panel and is controlled by a solid-state relay.
Maximum output to the compressor is limited to 600 W.
No power conditioning or conversion is performed.
The CryoSecure incorporates a microprocessor-
controlled circuit to detect a mains power failure,
measure the duration of the power failure, and
determine an appropriate control response based upon
user settings. During the power failure, a sealed,
rechargeable, 6-V lead-acid battery supplies power to
the CryoSecure for continued operation (nominally
10 hours). Indicators are conveniently located on the
front panel allowingthe user to monitor the status of the
controller: AC POWER indicates the CryoSecure is
operating from ac mains and is charging the internal
backup battery, MAINS FAIL indicates when mains
power has been interrupted, HOLDING indicates the
controller has entered the hold mode, WARMING
indicates the controller has entered the warm mode,
and BIAS OFF indicates the detector bias voltage has
been interrupted or shutdown. A front-panel, two-
position rocker switch turns power on and off, and a
push-buttonINITIALIZEswitch allowstheusertoselect
the sequence of operation.
The Bias Shutdown signal from the detector is passed
throughtheCryoSecureviaarear-panelBNCconnector
before continuing to the bias supply. This connection
allows the CryoSecure to prevent bias voltage from
being appliedto the detector until the detector has been
adequately cooled. The control unit also contains a
solid-state relay to control power to the compressor.

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2. SPECIFICATIONS
2.1. PERFORMANCE
INPUT AC VOLTAGE The CryoSecure can
accommodate input voltages of 100 V ac to 240 V ac
at 47 to 63 Hz.
INPUT CURRENT Typically 7.5 A rms when
connected to a 600-W compressor.
CIRCUIT PROTECTION The input ac power line is
protected with a 10-A fuse incorporated into the AC
POWER input connector on the rear panel.
2.2. CONTROLS AND INDICATORS
POWER Front-panel rocker switch turns power on/off.
INITIALIZE Front-panel push-button switch begins
systemoperation,andallowstheusertomanuallycycle
through the operating sequences.
LED INDICATORS
AC POWER—mains power on/ battery recharging.
MAINS FAIL—mains power failure
HOLDING—system holding after an mains power
failure.
WARMING—detector warming.
BIAS OFF—bias hold off.
HOLD TIME Internal printed wiring board (PWB)-
mounted rotary switches (qty. 2) allow the user to set
amount of time the CryoSecure waits before entering
the warming state after a mains power failure.
WARMING TIME Internal PWB-mounted rotary
switches (qty. 2) allow the user to set amount of time
the CryoSecure waits before restarting the compressor
after a mains power failure.
BIAS OFF TIME Internal PWB-mounted rotary switch
allows the user to set amount of time the CryoSecure
waits after restarting the compressor, before allowing
the detector bias voltage to be applied.
DANGER Isolate the controller from the mains
power supply before removing the
cover.
DEEP DISCHARGE PROTECTION In the event of a
long-term powerfailure, or if the ac mains are turned off
for an extended period of time, an internal relay will
disconnecttheinternalcircuitryfromtheinternalbackup
battery before the battery discharges. When ac power
is restored, the system will resume normal operation
and the battery will be recharged.
2.3. INPUTS
AC LINE IN Rear-panel, international-standard IEC
power connector, type CEE-22, accepts power cables
wired according to local electrical standards. A power
cable is shipped with the CryoSecure.
BIAS SHUTDOWN Rear-panel BNC connector
accepts Bias Shutdown signal from detector. During
normal operation, this signal is passed through a relay
contact to allow bias voltage to be applied to the
detector. During a holding, warming, or bias-off
(cooling) state, the Bias Shutdown signal is interrupted,
preventing bias from being applied to the detector.
2.4. OUTPUTS
COMPRESSOR Rear-panel, type NEMA 5-15R AC,
provides ac mains voltage to the compressor. A solid
state switch in series controls on/off operation of the
compressor.
BIAS SHUTDOWN Rear-panel BNC connector
provides Bias Shutdown signal to the Bias Supply High
Voltage Shutdown.
2.5. ELECTRICAL AND MECHANICAL
WEIGHT Net 2.6 kg (5.8 lb); shipping 3.2 kg (7.0 lb).
DIMENSIONS 21.5 cm (8.4 in.) wide, 26 cm (10.2 in.)
deep, and 10.2 cm. (4.0 in.) high. Aluminum enclosure.

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3. INSTALLATION AND STARTUP
3.1. SWITCHING ON
The battery is connected to the control logic by a self-
holding relay which is kept in the OFF state during
storage and shipping (see Section 5.2 for storage and
shipping preparation). When mains power is first
applied, the relay is switched on, and will remain on
during operation. While mains power is on, the battery
is continuously charging.
3.2. THE POWER-ON (“SAFE”) STATE
Following this first switch-on, the CryoSecure enters a
safe state, with the compressor and bias voltage both
held off. The HOLDING, WARMING, and BIAS OFF
LEDs all flash to indicate this state.
The system will return to this safe state if the mains
power input is still off at the end of the warming period.
To begin system operation, press and hold the
INITIALIZEbuttonformorethan5seconds.Thesystem
will then enter the warming state (see Section 4.1.3).
Release the INITIALIZE button when the LEDs indicate
the change to the warming state.
3.3. INSTALLATION IN A “WARM” SYSTEM
If the CryoSecure is installed in a system with the
detector at room temperature, it is inconvenient to have
to wait for the warming period to elapse before cooling
begins. In this case, the system can be forced from the
warming state directly to the cooling state. To do this,
proceed as in Section 3.2, then press and hold the
INITIALIZE button for an additional 5 seconds. The
WARMING LED will then go out and the compressor
will start. Note that, as for a power failure in normal
operation, the detector bias supply will be held off until
the end of the cooling period.
3.4. INSTALLATION IN A “COLD” SYSTEM
If the CryoSecure is installed quickly enough in a
systemwiththedetectoralreadyatworkingtemperature
(i.e., so that the detector has not had time to warm to a
dangerous state), it can be forced into the normal
working state (bypassing the warming and cooling
states) by pressing and holding the INITIALIZE button
for 5 seconds when in the cooling (bias-off) state.
4. OPERATING INSTRUCTIONS
4.1. OPERATIONAL STATES
4.1.1. Normal Operation
Duringnormaloperation,thecompressorisrunningand
the detector bias voltage can be applied. The
AC POWER indicator is lit; all other indicators are off.
4.1.2. AC Mains Power Failure—the Holding State
When the CryoSecure detects a mains power failure,
the system enters the holding state. During this state,
the AC POWER and WARMING indicators are off, and
the MAINS FAIL, HOLDING, and BIAS OFF indicators
are lit.
The CryoSecure will remain in this state until either
mains power is restored or the holding time period (as
set on the internal switches) expires. If mains power is
restored within the holding time period, the system will
return to the normal state. If the holding time is
exceeded but the mains power still off, the system will
enter the warming state. The holding time is set by the
factory so the detector will not have time to warm to a
temperature at which damage will occur if cooling
restarts.
4.1.3. The Warming State
In the warming state, the HOLDING LED is off and the
WARMING and BIAS OFF LEDs are lit. The
AC POWER LED is initially off and the MAINS FAIL
LED is lit. The duration of the warming period is set at
the factory with internal switches. If the mains supply is
restored during the warming period, the AC POWER
LED lights and the MAINS FAIL LED turns off.
The system will remain in the warming state, with the
compressor power off andthe detector bias supplyheld
off, until the end of the warming period. At the end of
the warming period, the system will enter the cooling
state. The warming period is set at the factory so that
the detector can warm to a safe temperature before
cooling recommences.
If the mains power supply is still off when the warming
periodexpires,thesystemwillenterthe“safe”power-on
state, described in Section 3.2.

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4.1.4. The Cooling State
In the cooling state, the AC POWER and BIAS OFF
LEDs are lit while the MAINS FAIL, HOLDING, and
WARMING LEDs are off. The compressor power is
reapplied, but the detector bias supply is held off.
The system will remain in the cooling state for the
period set on the internal BIAS OFF TIME switch, after
which the BIAS OFF LED will go out and the detector
bias voltage can be reapplied. The system will then
return to normal operation (see Section 4.1.1).
The cooling period (bias-off time) is set to a value long
enough for the detector to be cooled to a temperature
where it is safe to re-apply the bias voltage.
If the mains supply fails during the cooling period, the
CryoSecure will return to the start of the warming state.
4.2. SETTING THE HOLDING TIME
The holding time, which is the time the CryoSecure
waitsafteramainsfailure beforegoingintothewarming
state, is set with the two rotary selector switches
mounted along the top edge of the controller PWB,
labeled HOLD HI and HOLD LO.
DANGER Isolate the controller from the mains
power supply before removing the
cover.
The switches are BCD-type selectors, each with
settings from 0 to 9. The number set on the switches
corresponds to the holding time, with each unit of the
number set representing 5 minutes. The following table
give examples of some possible settings.
HOLD HI HOLD LO Time
(min) Time (h:min)
0150:05
1 0 50 0:50
3 5 175 2:55
9 9 495 8:15
4.3. SETTING THE WARMING TIME
The warming time, which is the time the CryoSecure
waits after a mains power failure before restarting the
compressor, is setwith the two rotaryselector switches
mounted along the top edge of the controller PWB,
labeled WARM HI and WARM LO.
The switches are BCD-type selectors, each with
settings from 0 to 9. The number set on the switches
corresponds to the warming time, with each unit of the
number set representing 1 hour. The following table
gives examples of some possible settings:
WARM HI WARM LO Time (h)
011
1010
3535
9999
4.4. SETTING THE COOLING
(BIAS-OFF) TIME
The cooling, orbias-off,timeisthetime theCryoSecure
waitsafterrestartingthecompressorbeforeallowingthe
detector bias voltage to be reapplied. It is set with the
rotaryselectorswitchmountedalongthetopedgeof the
controller PWB, labeled BIAS OFF.
The switch is a hexadecimal-type selector with settings
from 0 to F. The number set on the switches
corresponds to the holding time, with each unit of the
number set representing 2 hours. The following table
give a list of the possible settings:
Switch Setting Time (h) Switch Setting Time (h)
00816
12918
24A20
36B22
48C24
510D26
612E28
714F30
4.5. DEEP DISCHARGE PROTECTION
In the event of a long-term power failure or if the mains
is switched off for a long period, the battery, normally
charged to 6.75 V, will eventually discharge to 5.25 V.
When this voltage is reached, a self-holding relay will
de-energize,disconnectingthebattery.TheCryoSecure
will then be in the shipping/storage-preparation state
described in Section 5.2. The battery will reconnect
automatically when mains power is restored, and the
system will go into the “safe” state described in
Section 3.2.

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5. CALIBRATION AND MAINTENANCE
5.1. TEST MODE
If the jumper link marked W3 on the PWB is removed,
the system will run in a test mode in which the timers
will run at 60 times the normal rate. For example, a
period set to 3 hours will actually elapse in 3 minutes.
This is useful for checking system operation.
WARNING Remember to reinstall W3 after
testing.
5.2. STORAGE AND SHIPPING
DANGER Isolate the controller from the mains
power supply before removing the
cover.
With the CryoSecure disconnected from the mains
supply, remove the top cover and locate the sealed,
rechargeable, lead-acid battery (to the left of the unit as
viewed from the front). Disconnect the red lead to the
battery,wait10 seconds,then re-connectit.Thebattery
will now beisolated from the control circuitry untilmains
power is reapplied.

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