CN208297465U - A kind of portable oxygen detector calibrating installation - Google Patents
A kind of portable oxygen detector calibrating installation Download PDFInfo
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- CN208297465U CN208297465U CN201820980594.0U CN201820980594U CN208297465U CN 208297465 U CN208297465 U CN 208297465U CN 201820980594 U CN201820980594 U CN 201820980594U CN 208297465 U CN208297465 U CN 208297465U
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Abstract
It include oxygen detection instrument calibrating unit and laser spectrum oxygen detection instrument the utility model discloses a kind of portable oxygen detector calibrating installation, it includes cabinet that oxygen detection instrument, which examines and determine unit, the cabinet is rectangle, front side is equipped with multiple glove holes, top is equipped with observation window, multiple calibrating stations are equipped in case, cabinet side is equipped with inert gas purge mouth, position of the inert gas purge mouth towards calibrating station, calibrating flue is additionally provided on the cabinet of inert gas purge mouth side simultaneously, examining and determine flue has multiple channels, the portable oxygen detector and laser spectrum oxygen detection instrument on calibrating station can be connected respectively, cabinet is equipped with temperature control system and humidity control system, the design of the utility model multistation allows to simultaneously examine and determine multiple oxygen detection instrument, significantly improve calibrating efficiency, using laser Detection view carries out cooperation calibrating, avoids the detection error as caused by calibrating gas concentration inaccuracy, improves calibration accuracy.
Description
Technical field
The utility model belongs to instrument testing Calibration Technology field, examines and determine more particularly, to a kind of portable oxygen detector
Device.
Background technique
Oxygen detection, which has to compare in industrial production or daily life, to be widely applied, such as in certain special rings
Border is generated as in mine or when underground job, often having a large amount of gas, if not in time to oxygen content monitoring, can cause
Mixed Gases Explosion, or due to oxygen content deficiency, the problems such as easily construction personnel being caused to suffocate.Therefore oxygen in the industrial production
The monitoring of gas is important safety assurance means.
Currently used for the portable oxygen detector of the concentration of oxygen in detection operating environment, generally by electrochemistry or oxidation
The composition such as oxygen detection element, electronic component and display portion of object and semiconductor, will be in surrounding air by oxygen detection element
Oxygen density value is converted into electric signal, then by processing of circuit, and is shown with concentration value, some instruments also have oxygen
The corresponding electric signal output function of concentration value, when measured oxygen concentration value be less than or equal to alarm setting value when can automatically sending sound,
Light, vibration alarm signal, warning Field Force withdraw danger zone as early as possible.
The highest range that oxygen detection instrument is commonly used is usually 20% or 25%, while being missed to sensitivity, detection
There are specific requirement in difference, response time etc., while the comparison that the use environment of oxygen detection instrument has is severe, will appear inspection often
The problems such as indeterminacy, slack-off response.Thus need to calibrate this quasi-instrument before use.Existing detection method is to oxygen
Detector is individually detected, and the required time is long, and detection efficiency is low, is not suitable with the needs of modern production.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of oxygen detection instrument calibrating installation.
The complete technical solution of the utility model includes:
A kind of portable oxygen detector calibrating installation, including oxygen detection instrument calibrating unit and laser spectrum oxygen detection
Instrument, the oxygen detection instrument calibrating unit includes cabinet, and the cabinet is rectangle, and front side is equipped with multiple glove holes, top
Equipped with observation window, be equipped with multiple calibrating stations in case, cabinet side is equipped with inert gas purge mouth, inert gas purge mouth towards
The position of station is examined and determine, is additionally provided with calibrating flue, the calibrating gas simultaneously on the cabinet of inert gas purge mouth side
Pipe has multiple channels, can connect portable oxygen detector and laser spectrum oxygen detection instrument on calibrating station, case respectively
Body is equipped with temperature control system and humidity control system；
The temperature control system includes temperature sensor, heating and cooling body, the humidity control system packet
Include humidity sensor, humidification and hydrofuge mechanism.
The calibrating station number is 3.
The calibrating flue includes 4 channels.
When examining and determine portable oxygen detector, it is first turned on chamber door, by portable oxygen detector to be detected
It is put on the intracorporal calibrating station of case, closes chamber door, opening temperature control system and humidity control system, set temperature 30
DEG C, humidity 45%, later on nitrogen starts to purge, nitrogen gas purity 99.99%, and temperature is 30 DEG C, humidity 45%, to
After the intracorporal temperature and humidity of case stablizes 1.5h, the detector examined and determine on station is passed through pressure reducing valve by glove hole by operator
Calibrating flue and laser spectrum oxygen detection instrument are connected with gas flowmeter；
After portable oxygen detector is powered first, being filled with purity toward calibrating flue is 99.99% nitrogen, and is passed through
Light spectrum oxygen detection instrument detects nitrogen, after confirmation, harmonizes the zero of oxygen detection instrument and laser spectrum oxygen detection instrument
Point；
25% Oxygen in Nitrogen calibrating gas by gas flow as defined in instrument is passed through instrument, by oxygen detection instrument and
The show value of laser spectrum oxygen detection instrument is transferred to consistent with standard value；
By gas flow as defined in instrument, it is passed through 10% Oxygen in Nitrogen calibrating gas, first reading laser spectrum oxygen
The oxygen concentration that gas detector test arrives stablizes indicating value, takes 5 times, and its arithmetic average is calculatedIt then calculates for every
A formula oxygen detection instrument of taking carries out error testing, and reading is respectively taken the oxygen concentration stabilization that formula oxygen detection instrument detects every time and shown
Value, takes 3 times, is calculated as x respectively1, x2, x3, and error σ is calculated accordingly:
If σ < 0.5%, then it is assumed that upcheck；
By gas flow as defined in instrument, it is passed through 15% Oxygen in Nitrogen calibrating gas, is repeated the above steps；
By gas flow as defined in instrument, it is passed through 20% Oxygen in Nitrogen calibrating gas, is repeated the above steps；
Alarm error testing: the alarming value of portable oxygen detector is set as 20%, selection is passed through 15% nitrogen
Middle oxygen examines and determine gas, reads instrument show value when alarm, continuously takes 5 times, and calculate its average value, if the error with 20%
Less than 0.1%, then it is assumed that upcheck；
Response time calibrating: being passed through nitrogen, after zero point stability, by the nitrogen for being passed through 15% by gas flow as defined in instrument
Middle oxygen examines and determine gas, and reads stability number shown by portable oxygen detector.It is subsequently passed nitrogen, zero point stability
Afterwards, gas is examined and determine by the Oxygen in Nitrogen that gas flow as defined in instrument is passed through 15% again, value to be shown is remembered when being 13.5%
It records the time, repetition is done 5 times, and calculates average time, and average time is less than 20s and thinks qualified.
The utility model compared with the existing technology the advantages of be: cabinet use constant temperature and humidity system, meet related specifications
Requirement purged by the nitrogen of same humidity and temperature, environment in case made to be rapidly reached required want while before calibrating
It asks, is reduced to the time needed for examining and determine preparation originally from 6 hours 1.5 hours, while the design of multistation allows to
Multiple oxygen detection instrument are examined and determine simultaneously, significantly improve calibrating efficiency.Simultaneously by the cabinet design of glove-type, make to grasp
Making personnel can operate under the premise of not destroying its temperature and humidity, improve calibration accuracy and efficiency, examined using laser
It surveys view and carries out cooperation calibrating, avoid the detection error as caused by calibrating gas concentration inaccuracy, improve calibration accuracy.
Detailed description of the invention
Fig. 1 is oxygen detection instrument calibrating installation structural schematic diagram disclosed by the utility model.
In figure: 1- cabinet, 2- glove hole, 3- examine and determine station, 4- nitrogen blow valve port, and 5- examines and determine flue, 6- laser spectrum
Oxygen detection instrument, 7- temperature sensor, 8- temperature control system, 9- humidity sensor, 10- humidity control system, 11- observation
Window.
Specific embodiment
The utility model is described further with reference to the accompanying drawings and detailed description.
A kind of portable oxygen detector calibrating installation disclosed in the utility model, including cabinet 1, cabinet are rectangular
Shape, front side are equipped with multiple glove holes 2, and top is equipped with observation window 11,3 calibrating stations 3 are equipped in case, and cabinet side is equipped with inertia
Gas blow valve port 4, inert gas purge mouth respectively correspond the direction of calibrating station, same on the cabinet of inert gas purge mouth side
When be additionally provided with calibrating flue 5, the calibrating flue is divided into 4 channels, wherein 3 channels can connect calibrating station respectively
On portable oxygen detector, another channel connects laser spectrum oxygen detection instrument 6.
Cabinet is equipped with temperature control system 8 and humidity control system 10, and the temperature control system includes that temperature passes
Sensor 7, heating and cooling body.The humidity control system includes humidity sensor 9, humidification and hydrofuge mechanism.
When examining and determine portable oxygen detector, it is first turned on chamber door, by portable oxygen detector to be detected
It is put on the intracorporal calibrating station of case, closes chamber door, opening temperature control system and humidity control system, set temperature 30
DEG C, humidity 45%, later on nitrogen starts to purge, nitrogen gas purity 99.99%, and temperature is 30 DEG C, humidity 45%, to
After the intracorporal temperature and humidity of case stablizes 1.5h, the detector examined and determine on station is passed through pressure reducing valve by glove hole by operator
Calibrating flue is connected with gas flowmeter, while the last one channel for examining and determine flue is connected into laser spectrum oxygen detection
Instrument.
Examining and determine gas is that Oxygen in Nitrogen examines and determine gas, refers to the mixed gas of nitrogen and oxygen, oxygen is dense in gas
Angle value is respectively 10%, 15%, 20%, 25%, is calculated by volume.
(1) after portable oxygen detector being powered first, being filled with purity toward calibrating flue is 99.99% nitrogen, and
Nitrogen is detected by light spectrum oxygen detection instrument, after confirmation, harmonizes oxygen detection instrument and laser spectrum oxygen detection instrument
Zero point.
(2) 25% Oxygen in Nitrogen calibrating gas is passed through instrument by gas flow as defined in instrument, by oxygen detection
The show value of instrument and laser spectrum oxygen detection instrument is transferred to consistent with standard value.
(3) by gas flow as defined in instrument, 10% Oxygen in Nitrogen calibrating gas, first reading laser spectrum are passed through
The oxygen concentration that oxygen detection instrument detects stablizes indicating value, takes 5 times, and its arithmetic average is calculatedIt then calculates and is directed to
It each takes formula oxygen detection instrument and carries out error testing, reading is respectively taken the oxygen concentration stabilization that formula oxygen detection instrument detects every time and shown
Value, takes 3 times, is calculated as x respectively1, x2, x3, and error σ is calculated accordingly:
If σ < 0.5%, then it is assumed that upcheck.
(4) by gas flow as defined in instrument, it is passed through 15% Oxygen in Nitrogen calibrating gas, is repeated the above steps.
(5) by gas flow as defined in instrument, it is passed through 20% Oxygen in Nitrogen calibrating gas, is repeated the above steps.
Alarm error testing: the alarming value of portable oxygen detector is set as 20%, selection is passed through 15% nitrogen
Middle oxygen examines and determine gas, reads instrument show value when alarm, continuously takes 5 times, and calculate its average value, if the error with 20%
Less than 0.1%, then it is assumed that upcheck.
Response time calibrating: being passed through nitrogen, after zero point stability, by the nitrogen for being passed through 15% by gas flow as defined in instrument
Middle oxygen examines and determine gas, and reads stability number shown by portable oxygen detector.It is subsequently passed nitrogen, zero point stability
Afterwards, gas is examined and determine by the Oxygen in Nitrogen that gas flow as defined in instrument is passed through 15% again, value to be shown is remembered when being 13.5%
It records the time, repetition is done 5 times, and calculates average time, and average time is less than 20s and thinks qualified.
The above is only the preferred embodiment of the utility model, not imposes any restrictions to the utility model, all
According to any simple modification to the above embodiments of the utility model technical spirit, change and equivalent structural changes, still
Belong in the protection scope of technical solutions of the utility model.
Claims (4)
1. a kind of portable oxygen detector calibrating installation, which is characterized in that examine and determine unit and laser light including oxygen detection instrument
Oxygen detection instrument is composed, the oxygen detection instrument calibrating unit includes cabinet, and the cabinet is rectangle, and front side is equipped with multiple hands
Sets of holes, top are equipped with observation window, multiple calibrating stations are equipped in case, and cabinet side is equipped with inert gas purge mouth, inert gas
Position of the blow valve port towards calibrating station, is additionally provided with calibrating flue simultaneously on the cabinet of inert gas purge mouth side, described
Calibrating flue have multiple channels, can connect respectively calibrating station on portable oxygen detector and laser spectrum oxygen
Detector, cabinet are equipped with temperature control system and humidity control system.
2. a kind of portable oxygen detector calibrating installation according to claim 1, which is characterized in that the temperature control
System processed includes temperature sensor, heating and cooling body, and the humidity control system includes humidity sensor, humidification and row
Wet mechanism.
3. a kind of portable oxygen detector calibrating installation according to claim 2, which is characterized in that the calibrating station
Number is 3.
4. a kind of portable oxygen detector calibrating installation according to claim 3, which is characterized in that the calibrating gas
Body pipe includes 4 channels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820980594.0U CN208297465U (en) | 2018-06-25 | 2018-06-25 | A kind of portable oxygen detector calibrating installation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820980594.0U CN208297465U (en) | 2018-06-25 | 2018-06-25 | A kind of portable oxygen detector calibrating installation |
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| CN208297465U true CN208297465U (en) | 2018-12-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828154A (en) * | 2018-06-25 | 2018-11-16 | 山东恒量测试科技有限公司 | A kind of oxygen detection instrument calibrating installation and method |
-
2018
- 2018-06-25 CN CN201820980594.0U patent/CN208297465U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828154A (en) * | 2018-06-25 | 2018-11-16 | 山东恒量测试科技有限公司 | A kind of oxygen detection instrument calibrating installation and method |
| CN108828154B (en) * | 2018-06-25 | 2024-02-23 | 山东恒量测试科技有限公司 | Calibrating device and method for oxygen detector |
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