Instruction Manual
Version：2.20
Date：2015-02-11
Remark：220VAC
P950 Process Oxygen Analyzer
Instruction Manual
SHANGHAI CHANGAI
ADD：Room 316, Hongyi Building, No.2158,
WanYuan Road, Minhang, Shanghai, P.R. China
Postcode：201103
TEL：021-51692285
FAX：021-33275656
WEB：www.ci-ele.com
CHENGDU CHANGAI (R &D Center)
ADD：Fifth Floor, Huaxia Building, Three-Section
of North JianShe road, Chenghua District, Chengdu, P.R. China
Postcode：610051
FAX：028-83277736
Hot line：400 700 8817
CHENGDU CHANGAI (Manufacturing Center)
ADD：No.199 HuaGuan road, Longtan headquarters economy city,
Chenghua District, Chengdu, P.R. China
Postcode：610052
FAX：028-83277736
After-sale Service：13882203509
Hot line：400 700 8817
10～96.00% O2
CHANGAI ELECTRONIC SCIENCE & TECHNOLOGY CO., LTD
www.ci-ele.com
USER NOTICE
Copy rights reserved to CHANGAI ELECTRONIC CO., LTD©,
any part of the content of this manual bears no modification,
duplication, transmission, transcription and translation to other
languages.
All rights reserved to manufacturer.
There is no further notice for any variation in this manual.
9 Appendixes
·P950 PROCESS OXYGEN ANALYZER
1unit
·P950 Instruction Manual
1pc
·Maintain card
1 pc
·Certificate
1 pc
Hint
Only a clear understanding of this manual could guarantee a
correct and reasonable utilization of P950.Therefore, please
read all the chapters in the manual before installing and using
this instrument.
The displayed numerical value in this manual is example,
which is set by manufacturer in advance. The actual numerical
value must be confirmed by users during the operation.
Special Attention
·This analyzer should not used at explosive applications;
·This analyzer should be protected from liquid things or
corrosive things.
· This analyzer should be away from high-power cable, relay
or other interference sources;
·The debugging, operation and maintenance of this analyzer
are in the charge of professionals;
·Disconnect the power before opening the case cover.
31
permission of manufacture
·Repair and faulty operation while violating operating procedure
·Rough Operation
We have to admit the time loss, inconvenient loss and the indirect loss
due to instrument failure. Besides, the accident damage, special
CONTENT
1. Summarization................................. .............................1
2. Typical Application.....................................................................1
3. Main Features..........................................................................2
damage, human operator error are not included in free warranty, which
4. Technical Index.......................................................................2
is same to the equipments which come from unauthorized channel.
5. Analyzer structure .............................................................................4
8.2 Maintain
5.1 Front Panel Introduction .......................................................4
5.2 Back Panel Introduction...........................................................6
It is important to do daily maintenance work to equipment; it poses a
direct or indirect influence on service life.
When clearing the appearance of equipment, the analyzer should be
power off. Cleaning the outside surface of equipment with soft cloth
which socks in water, organic solvent or cleaning chemicals are
forbidden.
8.3 Storage
6. Analyzer Install......................................................................8
6.1 Out of Box Audit................................................................8
6.2 Install Conditions.........................................................8
6.3 Installation..................................... ...................8
6.4 INLET Connection...................................................10
6.5 OUTLET Connection..........................................................10
7. Operation & Parameters Set...............................................11
The packed products should put in a storehouse with a temperature of
7.1 Startup...................................................................11
-5℃~50℃; relative humidity is less than 90%RH (25℃). The storage
7.2 Menu description...................................................13
place should be low dusting, smokeless, no moisture and no acid or
7.3 Menu Function & Set.....................................................14
alkaline corrosive gas.
7.3.1 Enter into menu mode.................................................15
Handle with care, do not crush!
7.3.2 Alarm value...........................................................16
7.3.3 Alarm mode....................................................17
7.3.4 Range set........................................ ..............18
7.3.5 Calibration....................................................21
30
7.3.6 Senior menu...............................................................23
8 Warranty, Maintain & Storage
7.3.7 Reset........................................................................26
7.3.8 Runtime.....................................................................27
7.3.9 Menu lock...................................................................28
8 Warranty, Maintain & Storage.........................................................29
8.1 Warranty.......................................................................29
8.2 Maintain..................................................................30
8.3 Storage....................................................................30
9 Appendixes............................................................................31
CHANGAI ELECTRONIC CO., LTD guarantees that the produced and
sold products are selected from the most reliable materials and
components and undergone the most comprehensive quality test. If any
mass defects occur under guarantee, please contact with CHANGAI
ELECTRONIC CO., LTD directly, our company will solve your
problem through components repair and exchange.
8.1 Warranty
1. Warranty period: one year from delivering goods date
2. Warranty Content: All the defects in equipment materials and
technology belong to warranty content, but the lost and tearing up of
nameplate on warranted equipments is not allowable.
3. None Warranty Scope:
·Ordinary Wear and Tear
·Operation Following No Regulars
·Ignore the regulation in the manual
·Tear down the nameplate of analyzer
·The installation, carrying, operation and maintenance break the
procedure in this manual
·Lack of effective protective measures in operation
·Change the function and technical performance of products
·Detach the parts and install the supplementary instruments under no
19
29
7.3.9 Menu lock
P950 Process Oxygen Analyzer
LOC menu is to set menu lock on or off.
Instruction Manual
Analyzer has menu lock function to prevent modifying analyzer
parameters from misoperation. When turn on menu lock switch, it
needs to input password 5609 to enter menu mode. When menu lock
switch is off, it can enter into menu mode directly.
Enter into menu mode, choose LOC menu, click
then click
/
button to choose ON or YES, then click
return to main menu.
1. Summarization
P950 Process Oxygen Analyzer is based on microprocessor, which
is adopts the ion flow oxygen sensor as measuring unit. It will
button to enter,
button to
display oxygen concentration in oxy-nitride mixed gas after
processing and calculating through microprocessor. There are a set
of alarm point, a set of analog output signal and a set of on-off
switch value for users.
2. Typical Application
AL
O2
%
ppm
The typical applications of P950 as follows：
· Air separation industry;
· Chemical and smelting industry;
· Protection gas detection for semi-conductors；
AL
O2
%
ppm
· Detection of sending oxygen concentration by high temperature
smelter;
· Detection oxygen concentration of vegetables and food
processing and storage process;
· Detection oxygen concentration of animals and pants cultivation
AL
O2
%
ppm
process;
· Detection of oxygen concentration in family, naval vessels,
Picture 17 Flow Chart of menu lock
28
tunnel, bore, air-raid shelters, city underground tunnel, etc.
1
3. Main Features
7.3.8 Runtime
· Adopts the ion flow oxygen sensor which is advanced in the
world;
· Intelligence, good stability, high reliability and long service life;
· Menu Lock Function: Prevent misoperation that changing
analyzer parameters to influence its normal operation;
HOUR menu is to check analyzer runtime. It starts timing once the
analyzer is turned on to know the using situation of analyzer.
Enter into menu mode and choose HOUR menu, click
button to
enter, the unit of runtime is hour. After checking, click
button to
return.
· Automatic clocking so as to know the condition of service;
· Easy operation and simple maintenance.
4. Technical Index
AL
O2
%
ppm
AL
O2
%
ppm
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O2
%
ppm
Characteristic:
·Range: 10.00~96.00% O2
·Accuracy: ±2% FS
·Repeatability: ±1% FS
·Stability: ±1% FS/7d
·Response Time: T90＜60S
Electrical Connection:
·Power Supply: 220V AC, 50/60Hz
·Consumption: Less than 10VA
·Contact Point Capacity：24V DC, 0.2A
·Analog output: 4-20mA (Allow less than 500Ω load)
Environment and Operational Conditions:
Picture 16 Flow Chart of analyzer runtime
·Install conditions: Plate mounting, non explosion area
·Ambient Temperature: 0℃ to 45℃, non-condensing
2
·Ambient Humidity: Less than 80%RH
27
·Storage Temperature: -5℃ to 50℃
7.3.7 Reset
·Gas flow:400 ~ 600ml/min, gas pressure: 86 ~ 106kPa
When there's unknown error, through FAC menu to reset to factory
Equipment Index:
·Display window: 4 digital pipes
settings.
Enter into menu mode, click
/
button to choose FAC menu, click
button to enter, then the analyzer display NO (that is will not reset
to factory settings), click
/
to factory settings), then click
button to choose YES (that means reset
button to confirm and return to
·Sensor: Ion flow oxygen sensor
·Sensor Life: More than 2 years (normal use)
·Analyzer Life: More than 5 years (normal use)
Analyzer Size:
main menu.
AL
O2
%
ppm
AL
O2
%
ppm
Picture 1a P950 front panel size
4-20mA
AL
O2
%
ppm
+
-
L
N
NC
NO
INLET
OUTLET
AC220V
FG
COM
MADE IN CHINA
021-51692285
Picture 15 Flow chart of reset
Picture 1b P950 back panel size
26
3
F-2 menu is to adjust 20mA. F-2 set method is the same as F-1, please
refer to it.
7.3.6.2 Check signal
F-3 menu is to check the sensor signal. Under senior menu, click
button to choose F-3 menu, click
Picture 1c P950 side size
button to enter, the display
value is the sensor signal, unit is uA, then click
5. Analyzer structure
/
button to return
to previous menu.
5.1 Front Panel Introduction
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O2
%
ppm
AL
O2
%
ppm
AL
O2
%
ppm
Display
Window
Indicator
Lamp
Power Switch
Buttons
Picture 2 Front View of Analyzer

Display Window：
Be composed of 4 digital pipes, it is the display window of
man-machine interaction. It displays analyzer information and
delay time when startup; under standard measuring mode,
displays oxygen concentration, and displays the menu, option,
Picture 14 Flow chart of check signal
data when it is under menu mode.
4
25

AL
O2
%
ppm
Buttons：
The function buttons is the input equipment that controls man-machine
interaction display, which composed by 4 buttons. The name and
function are shown as table 1.
Table 1 Name and function of buttons
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O2
%
Button
ppm
Name
Function
1. Under standard measuring mode click
Menu
AL
O2
%
this button to enter into menu mode;
2. Click this button to enter into the
ppm
selected menu.
Confirm
AL
O2
%
Press this button to confirm modification
when modify value
Up-Arrow
Roll upwards to select menu
Increasing
Increase 1 when setting numbers
ppm
Down-Arrow Roll downwards to select menu
Descending
AL
O2
%
Decrease 1 when setting numbers
ppm
Cycle

Click 1 time, move 1 position right forward
Indicator lamp
Be composed of 4 lamps, it used at indicator the analyzer status, the
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O2
%
ppm
mark and function are shown as table 2.
Picture 13 Flow chart of 4mA adjust
24
5
Table 2 mark and function of lamps
Mark
AL
O2
％
7.3.6 Senior menu
function
Enter into menu mode, click
Lighting when analyzer alarm, or extinguish
Lighting when display oxygen concentration , or it

Lighting when the unit of displaying oxygen
No use
Power switch
Press "-" to startup, press "o" to turn off.
5.2 Back Panel Introduction
button to choose CAL menu, click
button to change the cursor, click
/
button to change value of the cursor, after input password 0124, click
will extinguish
concentration is %, or it will extinguish
ppm
button to enter: click
/
button to enter into senior menu, there are 4 submenus as follows:
NO.
submenus
function
1
F-1
Adjust analog signal 4mA
2
F-2
Adjust analog signal 20mA
3
F-3
Check the signal of sensor
4
go－－
Return to previous menu
Notice: Senior menu password is 0124. This password is set by
I/O port
manufacturer, so users have no authority to modify it.
7.3.6.1 4mA adjust
OUTLET
INLET
Make the multi-meter with high precision to DC end, connect the red
and black pen respectively to terminal 4-20mA+ and 4-20mA-.
Under senior menu, click
Picture 3 Back View of Analyzer

I/O port
button to enter, then click
/
button to choose F-1 menu, click
button to change the cursor, click
/
button to change value of the cursor, use the multi-meter with high
The connect terminals of power supply, analog output and alarm
precision until the display value is about 4mA(error less than 0.01mA),
output. The mark and function are shown as table 3.
after adjustment then click
6
button to return to previous menu.
23
Table 3 mark and function of I/O ports
Mark
AL
O2
%
AC220V
AL
AL
O2
O2
%
%
Function
ppm
ppm
L
220V.AC power L
N
220V.AC power N
FG
Power ground, connect with earth
COM
Relay common end
COM connects with NO
NC
Relay normal closed end
when alarming, or COM
NO
Relay normal open end
connects with NC
+
4-20mA analog output anode
－
4-20mAanalog output cathode
4-20mA
ppm
Warning
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O2
%
ppm
Make sure correct connection before getting through the
power when linking each terminal to other equipments so as
to avoid electric shock.
Disconnect the analyzer power supply when connects lines.
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%
ppm
Do not short-circuit terminals at random or jump out
terminal with enclosure lest device would breakdown.
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%
ppm

INLET: gas inlet (refer to 6.4，page 10).

OUTLET: gas outlet (refer to 6.5，page 10）.
Picture 12 Flow chart of calibration
22
7
6. Analyzer Install
6.1 Out of Box Audit
7.3.5 Calibration
NOTICE: The analyzer has been strictly calibrated and does not need
Please open the package correctly. It is especially forbidden to using
to be calibrated when users get it, so users can use it directly.
long sheet shear knife in order to avoid to damage the analyzer. After
Under normal use, calibrate it once each year. In order to guarantee the
checking that analyzer's performance is intact and fittings are complete,
requirement of the accuracy in full range, please calibrate as following
proceed the next operations.
methods:
6.2 Install Conditions
Standard gas: the standard gas oxygen concentration is among 92%～
93%.
Install the analyzer near the position of monitored environment point as
far as possible in order to guarantee that the analyzer can make the
fastest response to gas concentration changing.
Analyzer work temperature is among 0 ~ 45℃. Analyzer should install
in places with little humidity (less than 80%RH), little dust, no
vibration, no corrosive gases and explosive mixed gases etc.
The analyzer mounting point should avoid heat source and machines
with high magnetic field (such as high-power cables, high-power relay,
electromotor and transformer, etc).
The gas pressure must be controlled in 86~106kPa, and gas flow
control in 400～600ml/min before piping into analyzer. After display
value of analyzer is stability, calibrate it as follows:
Enter into menu mode, click
/
button to enter: click
button to choose CAL menu, click
button to change the cursor, click
/
button to change value of the cursor, after input password 0918, click
button to enter into calibration menu. And then click
to change the cursor, click
/
button
button to change value of the cursor,
after input oxygen concentration, click
button, analyzer will
6.3 Installation
display NO (that is means cancel calibration), please click
/
The analyzer adopts dial adoption, the install steps are shown as
to select YES (means confirm calibration), then click
button to
follows:
con firm.
1. After choosing mounting point, drill an opening hole on installing
Notice: Calibration menu password is 0918. This password is set by
dial plate, the size is 151mm×75mm;
manufacturer, so users have no authority to modify it.
8
button
21
2. Take down installing brackets on both sides of analyzer;
Lower limit:
3. Put the analyzer into installing hole, install the installing brackets on
Enter into menu mode, click
button to enter: click
/
button to choose LO menu, click
button to change the cursor, click
/
both sides of analyzer again, screw mounting brackets and fix the
screws, finishing the settlement of analyzer, shown in picture 5.
button to change value of the cursor, set analog output lower limit
value, after adjustment, click
AL
button to return to menu mode.
O2
%
ppm
Picture 4 diagram of mounting hole size
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%
ppm
Mounting brackets
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%
ppm
Installing dial plate
Picture 10 Flow chart of lower limit set
Picture 5 Installation diagram
20
9
6.4 INLET Connection
1.The gas sent to analyzer should be clean and non-corrosive, if there is
impurities or corrosive gases in gas path, filter or chemo sorbent
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O2
%
ppm
AL
O2
%
ppm
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%
ppm
need to be used first, then send to analyzer. Such as sintered metal
filter (the filter size is 20~30um), active carbon filter (the filter size
is 20~30um).
2.The sample gas pressure must be control in 86～106kPa before inlet
analyzer. When the sample gas pressure lower than 86kPa, it is
necessary to use pump to extract sample gas; when the sample gas
pressure higher than 106kPa, it is necessary to control the pressure in
86~106kPa through Pressure Regulator, and then use needle valve to
control flow in 400～600ml/min.
3. To make sure accurate testing and reduce delay time, please reduce
gas path between gas source and INLET port. The structure should be
Picture 10 Flow chart of upper limit set
simple, connecting points should be few. If confined by on-site
condition, install one three-valve and one stick of exhaust pipe (the
length of exhaust pipe must be more than 300mm) so as to quicken
gas flow and replacement velocity.
6.5 OUTLET Connection
1. The OUTLET should be connected to air, it is forbidden to block, or
it will bring about perpetual damage of sensor. This is because the
inside gas path of analyzer is single passage, only can extract gas
10
19
through OUTLET, if it is blocked, the pressure will climb, bringing
7.3.4 Range set
about sensor damage due to pressure. Therefore, our company will
Analog range includes upper and lower limit. UP menu is to set the
upper limit, Lo menu is to set the lower limit.
2. If sample gas can be extracted to the air directly, then it will extract
Upper and lower limit mean the specific oxygen concentration and they
use to correspond analog output signal. Relation between upper and
lower limit and analog output signal as follow:
I 420mA
not bear any responsibility because of this.
directly; If sample gas cannot be directly extracted to the air (toxic
and harmful gas), then extract the gas to safe place. The OUTLET
and environment air should be unblocked.
16

 (O2  Lo)  4
UP  Lo
3. Please look up local, city, country relevant document about gaseous
emission.
Upper limit:
7. Operation & Parameters Set
Enter into menu mode, click
button to enter: click
/
button to choose UP menu, click
button to change the cursor, click
/
button to change value of the cursor, set analog output upper limit
value, after adjustment, click
button to return to menu mode.
In the flow chart of this instruction manual, the display window
and the indicator diagram is instead of calibration equipment.
7.1 Startup
Check if all lines in good condition and make sure no short circuit and
reversed polarity before connecting power supply, and then press “-”
end of power switch to startup.
After starting up, analyzer lights all digital pipes and lamps three times,
the next is the software information: P950-PRO-2.20-130902-YZP
which displays left scrolling. Then is countdown, and approach to
standard measuring mode.
Attention: Air should be first pipe into analyzer before connect power
supply, after startup, is the sample gas, this helps to extend the service
life of sensor.
18
11
7.3.3 Alarm mode
E menu is to set alarm mode, enter into menu mode, click
AL
O2
%
/
button
ppm
to choose alarm mode, then 3 choices:
1. H ALARM, that is when display value is higher than alarm value,
then alarm;
2. L ALARM, that is when display value is lower than alarm value,
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O2
%
ppm
then alarm;
3. No ALARM, which is turn alarm function off.
After adjustment, click
button to return to previous menu and
return to test mode.
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%
ppm
AL
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%
ppm
AL
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%
ppm
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%
ppm
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%
ppm
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%
ppm
Picture 6 Flow chart of starting up
Picture 9 Flow chart of alarm mode set
12
17
7.2 Menu description
7.3.2 Alarm value
AL menu is to set alarm value; output port of alarm includes COM, NC
AL
and NO. If it is alarm, COM connects with NO, if not, COM connects
E
F-1
with NC.
Enter into menu mode, click
/
button for 1s to enter, click
/
UP
button to choose AL menu and click
Lo
button to change cursor, click
button to change value of the cursor, after adjustment, click
button to return.
0124
MENU MODE
（Password 5609）
O2
%
F-3
go--
CAL
FAC
0918
HOUR
AL
F-2
LOC
ppm
go-Picture 7 menu tree diagram
AL
AL
O2
O2
%
%
Parameter
Range
Introduction
AL
0～99.99%
E
H/L/NO
UP
0～99.99%
Upper range
Lo
0～99.99%
Lower range
CAL
0124、0918
Input pass word to enter into
advanced menu
Alarm value
Alarm mode: High/ low/ no
alarm
ppm
Picture 8 flow chart of alarm value set
16
Table 4 parameters can be modified
ppm
13
FAC
YES/NO
Reset to factory settings
LOC
ON/OFF
Turn on/off menu lock
F-1
0～65535
adjust analog signal 4mA
F-2
0～65535
adjust analog signal 20mA
7.3.1 Enter into menu mode
When menu-lock switch is off, under standard test mode, press
button for 2s, and then release, enter into menu mode. When menu-lock
switch is on, click
button to enter into password get mode, click
button to change the cursor, click
7.3 Menu Function & Set
/
button to change the value
of the cursor, input password 5609, then click
button to enter into
menu mode:
Special Attention：
1. Must use the buttons under LCD to set the analyzer menus (refer
Table 5 menu mode
Main menu
Function
to table 1).
AL
Set alarm value
influence its normal operation, this analyzer has menu-lock
E
Set alarm mode
function. When open menu-lock function, need to input password
UP
Set analog output upper limit
5609 to enter into menu mode and change the settings. When close
Lo
Set analog output lower limit
2. To prevent misoperation that changing analyzer parameters to
menu-lock function, can enter into menu mode directly.
CAL
Input password to enter into calibration
3. Menu-lock switch can be set through LOC (refer to 8.9). Advice
menu or senior menu
users open the menu-lock switch after parameters set completely.
FAC
HOUR
Reset to factory settings
Check the analyzer runtime
LOC
Turn on/off menu lock
go--
Exit menu mode, and return to standard
measuring mode
14
15