Sanyo MCO-19M User manual

Service Manual
Multi-gas Incubator
SANYO Electric Co., Ltd.
Biomedical Business Division
MCO-19M
MCO-19M(UV)
SM9910245
FILE No.
()
()

Effective models
This service manual is effective for following models.
Name Product code Voltage and Frequency
MCO-19M 823 633 51 115V 60Hz
823 633 54 230/240V 50Hz
MCO-19M(UV) 823 633 71 115V 60Hz
823 633 74 230/240V 50Hz
㻌

Contents
㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌 Page
Specifications ------------------------------------------------------- 1
- Structural specifications
- Control specifications
- Performance specifications
Dimensions ----------------------------------------------------------------- 4
Gas circuits ----------------------------------------------------------------- 5
Temperature calibration ----------------------------------------------------------------- 6
CO2span calibration ----------------------------------------------------------------- 7
O2㻌span calibration ----------------------------------------------------------------- 8
CO2/O2zero calibration ----------------------------------------------------------------- 9
Components on PCB ----------------------------------------------------------------- 10
Connections on PCB ----------------------------------------------------------------- 11
Electric parts ----------------------------------------------------------------- 12
Wiring diagram ----------------------------------------------------------------- 13
Circuit diagram (MAIN / LCD) ----------------------------------------------------------------- 14
Control specifications ----------------------------------------------------------------- 16
Operational specifications of LCD panel ---------------------------------------------- 23
Prevention of contamination ----------------------------------------------------------------- 71
Specifications of sensors ----------------------------------------------------------------- 72
Mechanism of Double wavelength IR sensor ---------------------------------------------- 74
Water sensor ----------------------------------------------------------------- 75
Parts layout ----------------------------------------------------------------- 76
Setting procedures for optional components -------------------------------------- 77
How to install UV lamp add-on kit 䠄MCO-19UVS䠅-------------------------------------- 81
Installation of H2O2Generator (MCO-HP) ---------------------------------------------- 87
How to install H2O2decontamination kit (MCO-HL) and Electric lock ------------- 88
How to install Roller Base 䠄MCO-18RB䠅---------------------------------------------- 92
How to install Automatic CO2cylinder changeover䠄MCO-21GC䠅------------- 93
How to install Automatic CO2density calibration add-on kit 䠄MCO-SG䠅---------- 101
Test data ----------------------------------------------------------------- 102
- Temperature pull-up data
- Humidity pull-up data
- Temperature change during power failure
- Temperature recovery data (30sec/60sec door open)
- Humidity recovery data (30sec/60sec door open)
- CO2recovery data䠄30sec/60sec door open䠅
- N2/O2recovery data䠄30sec/60sec door open䠅
- Days before CO2tank becomes empty
- Days before N2/O2tank becomes empty
- Temperature distribution data – 15points measured
Instruction manual ----------------------------------------------------------------- 106

- 1 -

Specifications
ŶStrucutural specifications
Name Multi-gas Incubator
Model MCO-19M MCO-19M(UV)
External dimensions W620 x D710 x H900 mm
Internal dimensions W490 x D523 x H665 mm
Interior volume 162 L
Exterior Painted steel
Interior Stainless steel containing copper
Outer door Painted steel
Inner door Stainless steel with gasket
Gas tight split door 4 doors made of temperared glass
Tray 3 trays, made of stainless steel containing copper
Dimensions; W450 x D450 x H12 mm, Maximum load; 7 kg/tray
Access port Inner diameter; 30 mm, On the back side
Insulation Rigid-polyurethane foamed-in place
Heating system DHA system 䠄Heater jacket and air jacket䠅
Heater 314 W
Humidifying system Natural evaporation with humidifying pan
Temperature controller PID control system
Temperature display Digital display䠄Resolution: 0.1oC䠅
CO2controller PID control system
CO2 density display Digital display (Resolution: 0.1%䠅
O2controller PID control system
O2 density display Digital display (Resolution: 0.1%䠅
Air circulation Fan assisted
Air filter 0.3μm, Efficiency: 99.97 % or more
UV lamp (Option) 4 W×1 (Ozone-free emission)
Water level sensor Optical type
Alarms
Automatic set temperature alarm, automatic set CO2 density alarm,
Automatic set O2 density alarm, Upper limit temperature alarm,
various gas/sensor/heater alarms, Door alarm, UVlamp failure
Remote alarm contacts Allowable contact capacity: DC 30 V, 2 A
CO2inlet connection Diameter; 4䡚6 mm tube
CO2inlet pressure 0.03 MPaG䠄0.3 kg/cm2G, 4.3psiG䠅
O2inlet connection Diameter; 4䡚6 mm tube
O2inlet pressure 0.05 MPaG䠄0.5 kg/cm2G, 7.1psiG䠅

- 2 -
Name Multi-gas Incubator
Model MCO-19M MCO-19M(UV)
Accessories
3 trays, 3 sets of tray support, 1 gas tube, 1 humidifying pan
1 gas injection nozzle, 1 tube for gas injection nozzle,
1 pair of stacking plate A and B, 2 protective stickers, 6 tube bands
Weight 94 kg
UV Lamp Add-on kit
䠄MCO-19UVS䠅MCO-19UVS is standard equipment
Optional accessories
H2O2generator䠄MCO-HP䠅
H2O2Decontamination kit䠄MCO-HL䠅
H2O2Decontamination Reagent 䠄MCO-H2O2䠅
Automatic CO2density Calibration Add-on Kit䠄MCO-SG䠅
Gas pressure regulator 䠄MCO-100L䠅
Extra tray䠄MCO-47ST䠅including 2 tray supports,
Half tray䠄MCO-25ST䠅,
Automatic CO2cylinder changeover system䠄MCO-21GC䠅
Roller base䠄MCO-18RB䠅
UV lamp replacement kit (MCO-20UV)
Stacking spacer (MCO-18SB, when stacking on the MCO-175)
Stacking spacer (MCO-21SB, when stacking on the MCO-20AIC)
Ethernet (LAN) Interface (MTR-L03), RS232C/RS485 Interface (MTR-480)
SANYO Data acquisition software (MTR-5000)
4-20mA Interface (MCO-420MA, USA only)

- 3 -
ŶControl specifications
Model MCO-19M MCO-19M(UV)
Thermal sensor Thermistor
Temperature display LCD digital display
CO2controller Microcomputer; Input by keypad
CO2 density setting range: 0䠂䡚20䠂䠄Resolution; 0.1䠂䠅
Non-volatile memory
CO2density display LCD digital display (Resolution; 0.1䠂)
Water level detection Water level sensor 䠄Optic type䠅
H2O2decontamination
(Option)
- Microwaved H2O2 decontamination
- Low density H2O2solution (Oxidor) which can be purchased in the market
- Solution level detection by sensor
Electric lock (Option) Outer door is locked during H2O2decontamination
UV system Option. UV lamp lighting time can be
extended automatically
UV lamp lighting time can be extended
automatically
Self-diagnosis - Error code and error information are displayed by text.
- Remote alarm contact activates (DC30V, 2A)㻌with buzzer sounds.
ŶPerformance specifications
Model MCO-19M MCO-19M(UV)
Temperature control range Ambient temp. +5䡚50oC䠄ambient temp; 5䡚35oC䠅
Temperature distribution ±0.25oC䠄ambient temp; 25oC䚸setting; 37oC, CO2 5%, O2 5%, no load䠅
Temperature variation ±0.1oC䠄ambient temp; 25oC䚸setting; 37oC, CO2 5%, O2 5%, no load䠅
CO2control range 0䡚20 %
CO2variation ±0.15 %䠄ambient temp; 25oC, setting; 37oC, CO2 5%, O2 5%, no load䠅
O2control range 1~18, 22~80 %
O2variation ±0.2 %䠄ambient temp; 25oC, setting; 37oC, CO2 5%, O2 5%, no load䠅
Chamber humidity 95±5%R.H.
Rated voltage, frequency 110~120V, 60Hz 220V, 60Hz 220~240V, 50Hz
Amperage Max. 3.1A Max. 1.5A Max. 1.5A
Heat emission Max. 1274 kJ/h Max. 1206 kJ/h
Power consumption Max. 354 W Max. 335W
Noise level 30 dB (A scale)
Usable environment condition
Temperature: 5~35oC, Humidity: Equal or less than 80%R.H.
䠄Designed performance may not be obtained when ambient temp. is equal
or lower than 15oC䠅
Note) Specifications will be subject to change without notice.

- 4 -
Dimensions
Power cord

- 5 -
CO2sensor
䚷CO2inlet
䚷port
N2/O2inlet
port
O2/N2valve A
O2/N2valve B
Filter
Sample port
(Front)
O2sensor
CO2valve
Gas circuits

- 6 -
㻌Temperature calibration 㻌

Here is the explanation how to calibrate chamber temperature.
Ex) When setting temperature is 37.0䉝and actual temperature is 36.5䉝
Process Operation MENU
0 Set thermal sensor at the center of the chamber and start the unit running.
Leave it until chamber temperature is stable.
1 Press MENU key in Top screen to call MENU screen. Select Tools. Tools
2 Select Tools (1/2) screen is displayed. Select Temp/CO2Calibration.
3 Temp/CO2Calibration is displayed and press MENU key to activate MENU key. Select
OK and press ENTER key.
OK
4 Change the value in the column Temp Span to 36.5
䉝
by pressing digit shift key and
numerical value shift key.
5 Press MENU key to call MENU screen. Select OK and press ENTER key. OK
6 Automatically reverts to Select Tools㻌(1/2) screen.
*Note (1) It is important to have an accuracy in thermal sensor when measuring center temperature of
the chamber.
(2) Input range:1.0䉝~ 䇲1.0䉝. It is unacceptable to input over the range at once.
<Display of Process 1>
<Display of Process 3>
<Display of Process 4>

- 7 -
CO2span calibration
(Ex䠅When setting CO2density is 5.0% and actual CO2density is 4.5%:
Process Operation MENU
1 Put densitometer thorough the sample port at the front side of the unit to measure
chamber CO2 density.
2 Select Tools in the Top Screen. Tools
3 Select Tools (1/2) is displayed. Select temp / CO2Calibration and press OK key. OK
4 By pressing digit shift key and numerical value shift key, input actual CO2density
䠄4.5%䠅in the column CO2Span. Select OK and press ENTER key.
OK
5 Automatically reverts to Select Tools (1/2) screen.
*Note㻌(1) Input range: +1.0% ~ -1.0% (per input).
(2) Repeat CO2 calibration for several times until displayed CO2 density will match with
actual density.
(3) It is permitted to commence CO2 span calibration only when setting CO2 density is 5.0䠂.
CO2span calibration
䠘Display of Process-2䠚
䠘Display of Process-3䠚

- 8 -
O2span calibration
(Ex䠅When setting O2density is 5.0% and actual O2density is 4.5%:
Process Operation MENU
1 Put densitometer thorough the sample port at the front side of the unit to measure
chamber O2 density.
2 Select Tools in the Top Screen. Tools
3 Select Tools (1/2) is displayed. Select temp / CO2Calibration and press OK key. OK
4 By pressing digit shift key and numerical value shift key, input actual O2density
䠄4.5%䠅in the column O2Span. Select OK and press ENTER key.
OK
5 Automatically reverts to Select Tools (1/2) screen.
*Note (1)㻌Input range: +1.0% ~ -1.0% (per input).
(2)㻌Repeat O2 calibration for several times until displayed CO2 density will match with
actual density.
(3)㻌It is unacceptable to commence O2 span calibration when setting O2 density deviates㻌
䡂rom 18.0 ~ 22.0䠂.
㻌㻌㻌There is a blank in the rignt side of 䇾O2 Span䇿column.
䠘Display of Process-2䠚
䠘Display of Process-3䠚
O2span calibration
䣖 䣧 䣯 䣲 䢱 䣅 䣑 䢴 䢱 䣑 䢴 䣅 䣣 䣮 䣫 䣤 䣴 䣣 䣶 䣫 䣱 䣰 䢪 䢳 䢱 䢴 䢫
䣒 䣘 䣘 䣱 䣮 䣶
䣖 䣧 䣯 䣲 䣕 䣲 䣣 䣰 䢲 䢰 䢲
䤑
䣅 䢵 䢹 䢰 䢲
䤑
䣅 䢲 䢰 䢷
䤑
䣅
䣅 䣑 䢴 䣜 䣧 䣴 䣱 䢵 䢰 䢻 䢳 䣘 䢷 䢲 䢲
䣅 䣑 䢴 䣕 䣲 䣣 䣰 䢲 䢰 䢲 䢧 䢷 䢰 䢲 䢧 䢵 䢰 䢳 䢸 䣘 䢹 䢲 䢲
䣑 䢴 䣜 䣧 䣴 䣱 䢷 䢲 䢲
䣑 䢴 䣕 䣲 䣣 䣰 䢲 䢰 䢲 䢧 䢷 䢰 䢲 䢧 䢷 䢺 䣯 䣘 䢷 䢲 䢲

- 9 -
㻌CO2/O2zero calibration 㻌
㻌
Prior to commence calibration
zMake sure chamber temperature should be stabilized, CO2sensor BOX temperature should be
45䉝±2䉝, setting CO2density should be 0.0% and setting O2density should be 20.0%.
zMake sure there should not be left CO2in the chamber.
* Note) When you re-commence CO2calibration, outer door should be opened and make sure
there should not be left CO2in the chamber.
Procedure
1. Call Select Tools (1/2) screen to display Temp/CO2/O2 Calibration.
2. Turn the VR3 around CN15 on the main PCB or measure the voltages both ends of R63 to make
CO2 sensor reference cell voltage
䠄
CO2 Zero
䠅
to 4.00V±0.03V.
3. Turn the VR2 around CN3 on the main PCB or measure the voltages both ends of R40 to make
CO2 sensor gas cell voltage
䠄
CO2 Span
䠅
to 4.00V±0.03V.
4. Input 0.0% by pressing digit shift key and numerical value shift key and “0.1”% besides right to
the “CO2 Zero” being turned to black. (See the picture below)
5. Press MENU to call MENU display. Select OK and press ENTER key.
䣖 䣧 䣯 䣲 䢱 䣅 䣑 䢴 䢱 䣑 䢴 䣅 䣣 䣮 䣫 䣤 䣴 䣣 䣶 䣫 䣱 䣰 䢪 䢳 䢱 䢴 䢫
䣒 䣘 䣘 䣱 䣮 䣶
䣖 䣧 䣯 䣲 䣕 䣲 䣣 䣰 䢲 䢰 䢲
䤑
䣅 䢵 䢹 䢰 䢲
䤑
䣅 䢲 䢰 䢷
䤑
䣅
䣅 䣑 䢴 䣜 䣧 䣴 䣱 䢲 䢰 䢲 䢧 䢲 䢰 䢲 䢧 䢶 䢰 䢲 䢲 䣘 䢷 䢲 䢲
䣅 䣑 䢴 䣕 䣲 䣣 䣰 䢶 䢰 䢲 䢲 䣘 䢹 䢲 䢲
䣑 䢴 䣜 䣧 䣴 䣱 䢴 䢲 䢰 䢸 䢧 䢴 䢲 䢰 䢸 䢧 䢷 䢲 䢲
䣑 䢴 䣕 䣲 䣣 䣰 䢴 䢳 䢻 䣯 䣘 䢷 䢲 䢲
䣖 䣧 䣯 䣲 䢱 䣅 䣑 䢴 䢱 䣑 䢴 䣅 䣣 䣮 䣫 䣤 䣴 䣣 䣶 䣫 䣱 䣰 䢪 䢴 䢱 䢴 䢫
䣘 䣱 䣮 䣶
䣅 䣑 䢴 䣔 䣧 䣨 䢶 䢰 䢲 䢲 䣘
䣅 䣑 䢴 䣉 䣣 䣵 䢶 䢰 䢲 䢲 䣘
䣑 䢴 䣉 䣣 䣵 䢴 䢳 䢻 䣯 䣘

- 10 -
Components on PCB
CN14 #1 Local power supply (AC) #2 Baliast (Option for MCO-19M)
CN302
#1 Top heater,Back heater, Side heater, Frange heater #3 Bottom side heater Bottom front heater Bottom back heater #5 Front panel heater ࠉBimetal thermo Door heater
CN303
#1 CO2Heater A/B
#3 Agitating fan motor
CN20
#1-#2 H2O2relay (Option)
#3-#4 Electric key (Option) #5-#6 Standard gas valve(Option)
CN21
Control PCB (KEY) Display PCB (LCD)
CN6
#1-#2 Door Switch #3-#6 MCO-HP(Option) #7-#8 Standard gas SW (Option)
CN17
#1-#2 O2 A valve
#3-#4 O2 B valve
CN9
#1-#2 CO2 valve
#3-#4 CO2 auto changer valve (option)
CN3
#3-#7 CO2 sensor
CN1
#1-#5 Power transformer
CN2
#1-#2 Switching power supply
CN15
#1-#3 Water sensor
CN16
#1-#4 O2sensor
CN10
#1-#2 Remote alarm output
CN11
MTR-480C(Option) MTR-L03 MTR-420MA
CN4
#1-#2 Overheat protect sensor #3-#4 Temp.sensor #5-#6 CO2 BOX Temp.sensor
R63
For CO2zero calibration
R40
For CO2span calibration
CN12 #3-#4 Hinge sub heater
CN13 Buzzer PCB

- 11 -
Connections on PCB
䕔Connections on Main PCB
Connector Connects to Usage
Power transformer
CN1 #1 - #2: AC8.5V
#3: GND
#4, #5: AC18V
Power supply to PCB
CN2 Switching power supply
#1 - #2: 䠄GND䠅, DC5V Power supply to PCB
CN3 CO2sensor Control of CO2density
CN4
#1 - #2:
#3 - #4:
#5 - #6:
Overheat protect sensor
Temp. sensor
CO2BOX Temp. sensor
Detection of temperatures in the
chamber
CN6
#1 - #2: Door switch
#3 - #6:㻌MCO-HP 䠄Option䠅
#7 - #8: Standard gas switch (Option)
Detection of door opening
CN9 #1 - #2: CO2 valve 䠄DC24V䠅
#3 - #4: CO2 auto changer valve (Option) Control of CO2 valve
CN10
Remote alarm output
#1: COM
#2: N.O.
#3: N.C.
Output for remote alarm contact
Open between #1 and #2 in
normal condition.
CN11 MTR-480 (Option) Communication board
CN12 #3 - #4: Hinge sub heater Control of hinge sub heater
CN13 #1 - #2: Buzzer PCB
CN14 #2: UV lamp, ballast 䠄Option for MCO-19M䠅
CN15 #1 - #3: Water sensor Detection of water level in
humidifying pan
CN16 O2sensor Control of O2density
CN17 #1 - #2: O2 A valve
#3 - #4: O2 B valve Control of O2 valve
CN20
#1 - #2: H2O2relay 䠄DC24V䠅䠄Option䠅
#3 - #4: Electric lock䠄DC24V䠅䠄Option䠅
#5 - #6: 㻌Standard gas valve䠄DC24V䠅䠄Option䠅
CN21 Control PCB䠄KEY䠅
Display PCB䠄LCD䠅
CN302
#1: Top heater, Back heater, Side heater,
Flange heater
#3: Bottom side heater, Bottom front/back heater
#5: Front panel heater, Bimetal thermostat,
Door heater
Control of heaters
CN303
#1: Temp. fuse 70䉝, CO2heater A,
CO
2heater B
#3: Condensing fan motor
Control of temperature in CO2
sensor BOX
Control of condensing fan motor

Condensing fan motor Type FL2-011Y1MP FL2-011Y5MP Power supply Type HWS15-5 ZWS15-5/J
Rating 110-115V 220-240V DC5V Rating IN:85-265VAC 5V, 3A
Temp. fuse 70䉝Type SF70U SF70U Power switch Type BAM210131 BAM210131
Rating 250V, 7A 250V, 7A Rating AC250V, 10A AC250V, 10A
Flange heater Rating AC115V, 31W AC230V, 31W Door switch ᆺᘧ SS160-A15 SS160-A15
Resistance 432.7ȍ1685.4ȍᐃ᱁ 28V, 50MA 28V, 50MA
Door heater Rating AC115V, 85W AC230V, 85W Noise filter Type ZHG2210-11S ZHG2210-11S
Resistance 156.9ȍ610.3ȍRating AC250V, 10A AC250V, 10A
Bottom front heater Rating AC115V, 11.5W AC230V, 10W CO2 valve Type FAB11-X2265 FAB11-X2265
Resistance 1149ȍ5319ȍRating DC24V DC24V
Bottom front/back heater Rating AC115V, 10W AC230V, 10W O2 valve A/B Type FAB216212C FAB216212C
Resistance 1308ȍ15558.8ȍRating
CO2 heater A Rating AC71V, 19.5W AC141V, 19.5W Power transformer Type ATR-R502V ATR-R502V
Resistance 254ȍ1014ȍ䠄MCO-HL, option) Rating 115V 230V
CO2 heater B Rating AC45V, 12.5W AC89V, 12.5W H2O2 relay Type G2R-1A-T G2R-1A-T
Resistance 160ȍ639ȍ(MCO-HL, option) Rating 24V, 10A, 250V 24V, 10A, 250V
Front panel heater Rating AC115V, 37W AC230V, 37W Electric key Type LE-36 LE-36
Resistance 353.7ȍ1460ȍ(MCO-HL, option) Rating DC24V DC24V
Bottom side heater R, L Rating AC115V, 14W AC230V, 14W Standard gas switch Type SPS-35 SPS-35
Resistance 945ȍ5290ȍ(MCO-SG, option) Rating 5KPA 5KPA
Side heater R, L Rating AC115V, 30W AC230V, 30W Standard gas valve Type FAB11-X2265 FAB11-X2265
Resistance 441ȍ1763ȍ(MCO-SG, option) Rating DC24V DC24V
Top heater Rating AC115V, 8.0W AC230V, 8W
Resistance 1647ȍ6590ȍ
Back heater Rating AC115V, 12W AC230V, 12W
Resistance 1104ȍ4415ȍ
Hinge sub heater R,L Rating AC36V, 0.3W AC36V, 0.3W
Resistance 4410ȍ4410ȍ
Bimetal thermostat Type TH-2U TH-2U
Rating ON:60䉝OFF:70䉝ON:60䉝OFF:70䉝
CO2 sensor Type IR sensor IR sensor
Rating TPS2534 TPS2534
O2 sensor Type FCX-MW FCX-MW
Water sensor Type OLS-10003S OLS-10003S
Rating 5V 5V
Overheat protect sensor Type 103AT-1 103AT-1
Rating 10Kȍ,25䉝10Kȍ,25䉝
Temp. sensor Type 103AT-1 103AT-1
Rating 10Kȍ,25䉝10Kȍ,25䉝
CO2 BOX temp. sensor Type 103AT-1 103AT-1
Rating 10Kȍ,25䉝10Kȍ,25䉝
Ballast Type EKF-04115B1 EKF-04115B1
(Option for MCO-19M) Rating 115V, 4W 115V, 4W
UV lamp Type GL4 GL4
(Option for MCO-19M) Rating 4W 4W
Glow starter Type FG-7P FG-7P
(Option for MCO-19M)
Power transformer Type ATR-HN231UT ATR-HN235T
Rating 8.5V, +/-18V 8.5V, +/-18V
AC115V, 60Hz AC230/240V, 50HzAC115V, 60Hz
MCO-19M/19M(UV) AC230/240V, 50Hz MCO-19M/19M(UV)
Electric parts
- 12 -

Wiring diagram
- 13 -

Circuit diagram
<Main PCB>
- 14 -

< LCD PCB >
- 15 -

- 16 -
Control specifications
1. Temperature control
(1) Setting range: 0.0Υ~50.0Υ(Default setting: 37.0Υ)
(2) Automatic set temperature alarm
High temperature alarm setting range: Set temperature +1.0~+5.0Υ(Default setting:+1.0Υ)
Low temperature alarm setting range: Set temperature -1.0~-5.0Υ(Default setting:-1.0Υ)
(3) Alarm delay time: 0~15 minutes (Default setting: 15 minutes)
(4) How to set temperature
In TopScreen, press MENU key and select Set to display Stand-by Setting screen.
Move a curser on “Temperature” and set a value by pressing numeric keys.
Press MENU key and select OK and press ENTER key to memorize the value.
2. CO2 control
(1) Setting range: 0.0%~20.0%(Default setting: 0.0%)
(2) Automatic set CO2 density alarm
High CO2 density alarm setting range: Set density +0.5%~+5.0% (Default setting: +1.0%)
Low CO2 density alarm setting range: Set density -0.5%~-5.0% (Default setting: -1.0%)
(3) Alarm delay time: 0~15 minutes (Default setting: 15 minutes)
(4) How to set CO2 density
In TopScreen, press MENU key and select Set to display Stand-by Setting screen.
Move a curser on “CO2 Density” and set a value by pressing numeric keys.
Press MENU key and select OK and press ENTER key to memorize the value.
3. N2/O2 control
(1) Setting range: 1.0%~80.0% (Default setting: 20.0%)
It is uncontrolled O2 density when O2 setting range is exceeding 18.0% and less than 22.0%.
(2) Automatic set O2 density alarm
High O2 density alarm setting range: Set density +0.5%~+5.0% (Default setting: +1.0%)
Low O2 density alarm setting range: Set density -0.5%~-5.0% (Default setting: -1.0%)
(3) Alarm delay time: 0~30 minutes (Default setting: 30 minutes)
(4) How to set O2 density
In TopScreen, press MENU key and select Set to display Stand-by Setting screen.
Move a curser on “O2 Density” and set a value by pressing numeric keys.
Press MENU key and select OK and press ENTER key to memorize the value.
4. Alarms, safety functions and self diagnosis functions
(1) Upper limit temperature alarm
Setting range: Approx.35Υ~51Υ
When a chamber temperature is over the setting upper limit temperature, OVERHEAT indicator
will illuminate, buzzer will sound continuously and remote alarm will be active.

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(2) Automatic set temperature alarm
Setting range: Set temperature +/-1.0Υ~+/-5.0Υ(Default setting: +/-1.0Υ)
When a chamber temperature deviates from alarm setting range, the digits displaying current
chamber temperature will start blinking.
The following message will be displayed after an alarm delay time elapses.
“Warning:High Temp” --- For high temperature alarm
“Warning:Low Temp” --- For low temperature alarm
Buzzer will sound intermittently and remote alarm will be active.
(3) Automatic set CO2 density alarm
Setting range: Set CO2 density +/-0.5%~+/-5.0% (Default setting: +/-1.0%)
When a CO2 density deviates from alarm setting range, the digits displaying current CO2 density
will start blinking.
The following message will be displayed after an alarm delay time (0~15minutes) elapses.
“Warning:High CO2 Density” --- For high CO2 density alarm
“Warning:Low CO2 Density” --- For low CO2 density alarm
Buzzer will sound intermittently and remote alarm will be active.
(4) Automatic set O2 density alarm
Setting range: Set O2 density +/-0.5%~+/-5.0% (Default setting: +/-1.0%)
When a O2 density deviates from alarm setting range, the digits displaying current O2 density
will start blinking.
The following message will be displayed after an alarm delay time (0~30minutes) elapses.
“Waring:High O2 Density” --- For high O2 density alarm
“Warning:Low O2 Density” --- For low O2 density alarm
Buzzer will sound intermittently and remote alarm will be active.
(5) Auto Return
If there are no key operations for 90seconds in each setting screen, the setting mode will be
forcibly to the end and Top screen will be appeared.
(6) Key Lock
When Key Lock is active, the following message will be displayed on the stand-by setting screen.
“Key Lock” --- Key Lock is active
It is not permitted to change a stand-by setting value.
(7) Door alarm
Setting range of door alarm delay time: 1~30 minutes (Default setting: 2 minutes)
If an outer door is left opened, the following message will be displayed on the status screen.
“Door:Open” --- Outer door is left opened
Buzzer will sound intermittently after a door delay time elapses.