Oceanus OC-903 User manual

OC-903
Portable gas detector
Operating Manual
Henan Oceanus Import & Export Co., Ltd.

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Catalogue
◆Notice ………………………………………………………2
◆Description ………………………………………………………4
◆Feature …………………………………………………4
◆Parameter ……………………………………………………5
◆Structure ……………………………………………………7
◆Operation instruction ……………………………………………7
◆Operation interface …………………………………………………9
◆Remarks …………………………………………………12
◆Fault &Treatment ………………………………………………13
◆Data logger function …………………………………………14

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Notice:
Key instruction①：
Total six keys：▲、▼、Back、OK、run/stop、
Three interfaces：Testing interface、Menu interface、Setting interface
Six keys will have different function in the three interfaces as the
following:
Testing interface Menu interface Setting interface
▲ ---- move to left or up move to left or up /data plus
▼ ---- move to right or down
move to right or down/ data minus
Back ---- back back
OK main menu（Press 5s）
enter the sub menu Select/save
run/stop pump switch — —
on/off（Press 5s） on/off（Press 5s） on/off（Press 5s）
Attentions：OC-903 portable gas detector only available to detect the gas
concentration when the pump on.
Treatment for the over measuring range. ②
Please avoid use the device in concentration which exceeds the
measurement range. It will shorten the life of the sensor or damage the
sensor.
If user used the device under the high concentration gas exceeds the
measurement range, please take the device leave the environment at once,
and put the device in clean air for about half an hour to observe if the
displayed concentration value goes lower. If the value keep decreased,
please wait it decrease to zero, then power off. If the displayed value can
not decrease to zero in clean air, please send it back to manufacturer of

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distributor.
Remarks: If use the detector under the exceed range, this is not
provided the free repair service.
Calibrate service③
We promise all detector in our company be calibrated with normal gas
before leaving our factory, once bought from our company without need to
calibrate, and must under the professional technical guidance.
Warranty is 12months from the date leaving our factory, for the
accessory within 3months providing free maintenance, and for the detector
providing the free calibration service once in a year.
About the Backlight instruction④
OC-903 with the electricity saver procedure, when the device without
any operation within 30s, the detector will turn on the electricity saver
procedure automatically, then the screen will become dark, and press any
keys will become light again.
Fast operation instruction⑤
Mute: When the detector under the alarming, short press ▲ or ▼ will
be muted.
Manual storage：When the storage mode under the manual storage, on
the testing interface long press the ▲, then after the
“beep”, will keep the measuring data.
Menu entrance：Under the testing interface, long press “ok” for 5s
then will enter the menu.
Parameter revise instruction⑥
All parameter for OC-903 could be revised with the “Back”,
“OK”,▲,▼.

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1.Description
OC-903 series portable gas detector with dust detector, can be used
for multi gas and dust, at most for 4 sensors. With the imported sensor and
micro control technology, respond quickly, high accuracy and stability,
good repeatability. With the rechargeable 4000mA lithium battery,
continuous working for longer time. With the 2.4 inch industrial grade
color screen, displaying the each parameter and gas concentration, with the
function of detecting the temperature and humidity, also with the data
logger.
2.Feature
◆ With semiconductor technology of ultra low power 32 bit
microprocessor, 24 bit ADC acquisition chip.
◆ 2.4 inch IPS industrial grade color screen, displaying each parameter.
◆ It is able to select gas concentration unit of PPM、%VOL、mg/m3.
◆ For 1~4 gas detecting, supporting many sensor and temperature sensor,
humidity sensor.
◆ With data logger, about 100000 group of detecting data, could be
transmitted to computer.
◆ The various modes can be adjusted: detection model, storage model,
display model, pump model.
◆ The powerful pump, can be used in the micro vacuum environment.
◆The full auto calibration software, sensor can be adjusted up to six point
to ensure the accuracy and linearity of the measurement, also the
function of data recovery.
◆With overvoltage protection, overcharge protection, anti-static, anti
magnetic interference function.

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◆ Support Chinese or English operation menu.
◆ With the function of temperature compensation.
◆ With the temperature and humidity detection(optional).
3.Technical parameter
Product： Portable gas detector
Measuring
range： Refer to the gas list
Resolution：
Refer to the gas list
Gas type： At most for 4 sensors, the gas type will be according to your requirements.
Temperature
and
humidity：
Temperature：-40 ～ 120℃，Humidity：0-100%RH
Testing
mode：
Pump-suction，inner pump, adjustable flow rage(100-1000mL L/min), workable for the
vacuum environment.
Accuracy： ≤±3%F.S Linearity： ≤±1%F.S
Response
time： ≤20s（T90） Zero drift： ≤±1%（F.S/year）
Recovery
time： ≤20s Repeatability ： ≤±1%F.S
Testing
mode： Real-time detecting or Timing detecting is adjustable.
Data
Storage： Automatic storage or manual storage is adjustable; About 100000 group of data capacity.

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Explosion-Pr
oof grade： Ex d II CT4 Case Material ：
ABS+PC
Protection
grade： IP65 Working temperature： -30 ～ 60℃
Working
power： 4000mA rechargeable lithium battery Working humidity：
≤95%RH(non
-condensing)
Size and
weight：
180*80*60 mm（L×W×H）
0.5 Kg（Net weight）
Working
pressure：
-30Kpa ～
100Kpa
Accessory：
Dust filter, box, instruction, USB charger, data line, calibration cap
Target Gas List(Some gas not list, if need, please contact manufacturer)
Gas Range Accuracy Resolution Response time
Ex 0~100%LEL ≤±3%F.S 0.1%LEL ≤20s
CH4 0~100%LEL ≤±3%F.S 0.1%LEL ≤20s
O2 0~30%VOL ≤±3%F.S 0.01%VOL ≤20s
CO 0~1000PPM ≤±3%F.S 1PPM ≤20s
CO2 0~5000PPM ≤±3%F.S 1PPM ≤20s
O3 0~50PPM ≤±3%F.S 0.01PPM ≤20s
H2S 0~100PPM ≤±3%F.S 0.1PPM ≤20s
SO2 0~20PPM ≤±3%F.S 0.01PPM ≤20s
NO 0~100PPM ≤±3%F.S 0.1PPM ≤20s
NO2 0~20PPM ≤±3%F.S 0.01PPM ≤20s
Cl2 0~50PPM ≤±3%F.S 0.01PPM ≤20s
NH3 0~100PPM ≤±3%F.S 0.1PPM ≤20s
PH3 0~20PPM ≤±3%F.S 0.01PPM ≤20s
ETO 0~100PPM ≤±3%F.S 0.1PPM ≤20s
HF 0~10PPM ≤±3%F.S 0.01PPM ≤20s

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4.Structure
5.Operation instruction
5.1 Keys
Total six keys：▲、▼、Back、OK、run/stop、
Three interfaces：Testing interface、Menu interface、Setting interface
Six keys will have different function in the three interfaces as the
following:
Testing interface Menu interface Setting interface
▲ ---- move to left or up move to left or up /data plus
▼ ---- move to right or down
move to right or down/ data minus
Back ---- back back

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OK main menu（Press 5s）
enter the sub menu Select/save
run/stop pump switch — —
on/off（Press 5s） on/off（Press 5s） on/off（Press 5s）
Attentions：OC-903 portable gas detector only available to detect the gas
concentration when the pump on.
5.2 Power on
When power off, long press key for 5s to activate the backlight
and red indicator, then “beep”, then the detector power on. Then the
display will be sensor testing(3s),sensor information(1s),preheating for 60s
with the pump on. After the start-up, then will enter the Testing interface.
5.3 Power off
In normal working status, long press key for 5s, it will power off with
a buzzer tone.

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6.Operation interface
6.1 Testing interface display
After enter into the testing interface, for different gas quantity, will
display different interface：as the following picture, displaying one gas, two
gas, three gas, four gas orderly.
As the above displaying, time, temperature, pump running, battery
and humidity. Take A for example, for O3, CO, CH2O, Ex, for each gas
with the gas concentration; Once some up to the alarming value, it will
appear the alarming symbol, such as the CH2O alarming.

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6.2 Function menu instruction
Long press “OK” key for 5s, will enter to the menu, then will display
nine sub menu: Settings, History data, Data analysis, Zero calibration,
Target calibration, Alarming setting, Detection Storage , Date, Factory
reset. On this menu by “▲” or “▼” the can move to different sub menu,
then short press the “OK” key will enter the sub menu, pressing the “back”
will back to normal detecting interface.
6.2.1 Settings
Enter into setting menu, then display each parameter, by “▲” or “▼”,
“ok” key, user can revise different parameter. With the “Range/unit setting”
option, user can check and revise different measuring range and
concentration unit(ppm、mg/m³、VOL% is selectable); With the “Channel
setting”, can turn on or off some one or more channel gas.
With the “Pump flow rate ” can adjust the pump flow rate(only need to
setting under vacuum environment, default is 30); With “Temperature
correction” and “Humidity correction” can adjust the device display of
temperature and humidity; With “Language setting” can choose the
Chinese or English.
6.2.2 History data
User can check the previous measuring data, after entering into the
“History data”, then will display “Check” or “Delete” the data. If choose to
check the history data, move the cursor to “Check”, then press “OK” key,
and by “▲” or “▼” will change into the export status, then press twice “ok”
key will find the previous concentration data.
6.2.3 Data analysis
This function record the average concentration and largest
concentration of each gas type in the process of usage. TWA is the average
concentration, STEL is the largest concentration.
6.2.4 Zero Calibrate

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If the zero drift of the sensor is larger, user can do the zero calibration,
this will make the default of target gas concentration as “0”.
Attention: zero calibration must be in the clean air.
6.2.5 Target Calibrate（Only professional engineer operation allowed）
OC-903 portable gas detector can make the six level target
concentration calibration for the detecting gas, as the picture shows, this
must with the standard concentration gas, pressure
relief valve, flow meter, calibration cap, and good
connection of gas, or will be prohibited.
Operation details: Connecting the device as the
picture, enter into the target gas calibration interface,
slowly turn on the calibrate gas and control the flow
rate within 500ml/min, observing the detector gas
concentration(now should be rising), when the value
up to the peak value and keep stable, then choose a
non-calibrated option(“√” means been calibrated,
“×” means non-calibrated): firstly input the calibrate
gas concentration, then press the “calibrate”. After completing the target
point calibration, the target gas concentration of detector will be the
calibrate gas concentration.
6.2.6 Alarming setting
OC-903 with two adjustable alarm threshold values, high alarming
value and low alarming value. When set the low alarming, gas
concentration lower than the set value will alarm; when set the high
alarming , gas concentration higher than the set value will alarm.

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Operation details: user move the cursor to “Alarming mode”, press
“ok”, by “▲” or “▼” can change the alarming mode, after switch then
press “ok” will save the setting.
6.2.7 Detection storage
With this function user can set the detecting mode, storage mode, the
detecting mode including the real-time detecting and timing detecting,
storage mode including the manual save , automatic save and close(not
save).
If real-time detecting, the detector will display the real-time
concentration of each channel, then user can set the storage mode, also can
set the storage cycle. If timing detecting mode, will display the average
concentration is this period, can set the timing cycle and round cycle(time
between the twice timing detecting).
Setting the timing detection, need to back to the Detecting interface to
press the “Run/stop” key, turn on the countdown to begin timing detection,
if not turn on the round detecting, when the countdown over, the detector
will stop pump detecting automatically; if turn on the round detection, after
several seconds, it will begin the timing detecting again automatically.
6.2.8 Date
Setting the date related with the detecting gas concentration data.
6.2.9 Factory reset
Once mistake operation, user can use this function to recover the
initial configuration.
7.Remarks
◆Before use the detector, please read the instruction carefully.
◆Prohibit open the detector and replace the accessories privately.
◆Install ,setting must be operated by professional guidance.
◆Regularly check the device and change the sensor.

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◆Prohibit drop from high space.
◆Under the high temperature or pressure is not allowed to use, if high
humidity, then need to add the device to decrease the humidity.
◆Human damage is not free repair.
◆Before enter into dangerous area, people need to be electrostatic
discharged, then bring the detector into the working place.
◆Using the special charger for this detector.
8.Common faults and treatments
◆ Value display not stable, up and down
Reason：some electrochemical sensor easily effected by other gas,
maybe is colorless and odorless.
Solution：Bring the detector into clean air, then the data will decrease to
normal value; If still not normal, then zero calibrate in clean air.
◆ Response weak
Reason：Lower level of oxygen：<5%VOL；
High pressure, pump not work；
The sensor useful life end, or other faults；
Solution：If the Electrochemical sensor, Catalytic combustion sensor,
Semiconductor sensor, need oxygen to work, so the level
of oxygen should more than 5%VOL，pressure range is：
-30Kpa ～ 100Kpa，If user have calibrate gas, can import
the gas to test and target point calibrate. If oxygen and
pressure both normal, then maybe other faults, need to
send back to manufacturer.
◆ After access the detecting gas, the data can’t stable for a long time, up
and down
Reason：Maybe the too low content of oxygen in the detecting gas, or
the change of the detecting gas.
Solution：Increasing the oxygen level and keep stable flow rate, or

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change the higher oxygen calibrate gas.
◆ Pump weak, lack strength
Reason：Pump have suction many particle and gas, the entrance
blocked.
Solution：Send back to manufacturer to change a new pump, adding the
dust filter in the later usage.
◆ Turn on fails
Reason：No power.
Solution：After charge, if still can’t turn on it, then send back to
manufacturer.
◆ Charged fails
Reason ：Charger problems or wrong model charger
（Usually5-5.5VDC，1-2A）
Solution：Check the charger output voltage if is 5V,if not, then need to
change the charger, if is 5V, then need to send back to
manufacturer for testing.
9.Data logger
OC-903 with the data logger function, the charging port is the data
output port, the operation steps as the following:
1、Install the export software on the computer.
2、Turn on the detector, after the 60s preheating over, connected
with the computer.
3、After install the drive of communication line, open the software,
and confirm the computer COM port, then click the “Open
port”, now the lower left corner will display the “Port
Open ”(Baud rate default is 115200)
4、Enter into the history data menu interface, export the gas
concentration data, if complete will appear the cues.

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5、On the software, set the detector address and channel
number(same with the “address setting” and “channel
setting” in the “Setting”), start time and deadline(The save
time of history data should be in this period range).
6、Click the “search” can find the above period gas concentration
for the according channel gas, the data also could be saved
as the EXCEL form by click the “Read Data”
Remark: Data transmission line is the USB connection line.
Henan Oceanus Import & Export Co., Ltd.
Email:[email protected]
Web: http://china-oceanus.com/