PGSM系列精密露点仪

冷镜式精密露点仪适用于各种不同的应用场景冷镜式精密露点仪用于测量空气中的露点温度，从而确定空气中的水蒸气含量。

它在许多领域中发挥着重要作用，特别是在气象学、工业控制和环境监测领域。

冷镜式精密露点仪的核心部件是一个冷却装置和一块特殊的镜子。

当空气通过冷却装置时，其中的水分会凝结成水滴，并在镜子上形成雾气或露水。

通过测量这些水滴的形成时间和温度，可以计算出露点温度，从而得知空气中的水蒸气含量。

该仪器具有高精度和稳定性的优点。

其传感器能够测量非常低的露点温度。

这种高精度使得其在特殊气候条件下的应用更加可靠。

还具有快速响应和广泛的测量范围，适用于各种不同的应用场景。

在气象学中，被广泛用于测量大气中的水蒸气含量。

露点温度是一种重要的气象参数，与空气湿度和降水有着密切的关系。

通过监测露点温度的变化，可以预测天气变化和降雨可能性，并提供给气象学家和气象预报员重要的数据。

在工业控制方面，可用于监测空气中的水分含量，以确保生产过程的稳定性和产品质量。

许多工业过程对空气中的水分含量非常敏感，例如电子制造、食品加工和制药行业等。

通过实时监测露点温度，工程师可以及时调整工艺参数，以确保生产环境中的湿度在安全范围内。

在环境监测领域，可用于评估空气质量和室内环境的湿度状况。

室内潮湿度过高可能导致霉菌滋生和健康问题，而潮湿度过低则可能引起静电和干燥不适。

通过使用露点仪，可以及时监测室内空气的湿度，并采取相应的措施来维护良好的室内环境。

冷镜式精密露点仪是一种可靠、高精度的仪器，用于测量空气中的水蒸气含量。

它在气象学、工业控制和环境监测等领域发挥着重要作用。

露点仪安全操作及保养规程露点仪是测量空气中水分浓度的一种仪器，广泛应用于化工、制药、电子等行业。

在使用露点仪时，用户必须遵守安全操作规程，以确保设备的正常运行和维护设备的寿命。

本文将介绍如何安全操作和保养露点仪。

安全操作1. 仪器放置在使用露点仪时，首先要考虑安装位置。

安装位置应该选择一个干燥、通风的场所，并且要远离水源和高湿度环境。

在使用仪器时，操作者不要将设备放置在易受水或湿气侵入的地方，避免对设备造成损坏。

2. 操作流程使用露点仪前，必须了解其操作流程。

首先，应按照说明书的指导，将仪器接通电源并打开电源开关。

根据实际需要，选择合适的传感器并将其插入仪器中。

在进行测量之前，应进行预热，直到仪器达到稳定工作状态。

具体预热时间请参考说明书。

测量时，应按照说明书的要求设置测量参数，以获得准确的测量结果。

使用完毕后，要及时关闭电源开关并断开电源。

3. 保养维护露点仪的保养和维护对于仪器的寿命和使用效果有着至关重要的作用。

常见的保养方法有：•清洁控制面板和外壳：使用干燥的布或毛刷，清除控制面板和外壳上的灰尘和污垢。

•维护传感器：定期检查和清洁传感器，以确保其正常运行。

若发现传感器上有积水或水汽，要及时抹干。

•定期校准：应定期校准仪器，以确保测量结果的准确性。

校准的具体方法请参考说明书。

•更换零部件：如果发现零部件出现损坏或异常磨损时，要及时更换。

4. 安全注意事项在使用过程中，应注意以下安全事项：•不要试图拆开或更换仪器的部件，以免影响仪器的正常运行。

•不要在高湿度的环境中使用仪器，否则可能会导致仪器损坏。

•不要使用化学溶剂或水直接清洁仪器，应该使用特殊的清洁剂。

使用清洁剂时，应按照说明书的指导操作，防止剂液进入仪器内部。

结论露点仪是一种重要的测量设备，在使用前必须了解其安全操作规程和保养方法。

本文介绍了露点仪的安全操作和保养规程，不仅有助于延长设备使用寿命，还有助于提高测量结果的准确性。

为了使用设备更加安全可靠，我们建议用户严格遵守这些规程。

在线精密露点仪安全操作及保养规程在线精密露点仪是一种用于测定气体或气体混合物的露点温度的仪器。

为了确保精度和稳定性，使用者需要遵守安全操作规程和保养规程。

本文将介绍在线精密露点仪的安全操作及保养规程，以确保使用者安全和仪器的长期使用。

安全操作规程1. 电源和电气设备在线精密露点仪的电源电压应符合说明书中的规定。

使用者应具备基本的电气知识，了解电源线路和插头规格，而非专业人士应遵循相关的安全操作规程。

2. 气源在使用在线精密露点仪之前，应将气源连接到仪器上，并确保气源纯度和压力满足仪器的要求。

使用者需要关注气源压力、流量是否满足仪器的要求，同时注意气体是否存在污染。

气体压力过高或过低都会导致仪器测量不准。

3. 环境温度和湿度在线精密露点仪一般应在室温下使用。

在温度过高或过低的环境中使用可能会影响仪器的精确度。

因此，在使用仪器时应避免直接阳光照射、放置在通风不良的环境中。

4. 误差修正和仪器校准为确保在线精密露点仪的精度和稳定性，使用者应定期进行误差修正和仪器校准。

建议在使用前每次测量都进行一次仪器校准，以便更好地保证测量的精确度。

同时，应根据仪器的说明书和相关标准进行误差修正和校准。

5. 预防静电在线精密露点仪在使用过程中容易产生静电，特别是在低温和低湿度环境下。

使用者应注意防止静电的产生，为了安全考虑建议不要在低温和低湿度环境下连续使用。

保养规程1. 清洁仪器表面在线精密露点仪的表面应保持清洁，不要使用含有磨粒的清洁剂或水直接清洗，以免损坏仪器表面和内部结构。

建议使用微渗透性清洁剂或专业清洁剂清洁仪器表面。

2. 更换过滤网和干燥剂在使用仪器一段时间后，过滤网和干燥剂需要定期更换，以维护仪器的正常运转。

使用者应该根据仪器说明书进行更换，建议每隔3个月更换一次过滤网和干燥剂。

3. 确保仪器良好工作状态使用在线精密露点仪时，应注意仪器的工作状态，包括控制面板、电源插头和气源管道是否间断，核查相关指示灯的工作情况，确保仪器正常工作。

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露点仪测量方法一、前言露点仪是一种用于测量空气中水汽含量的仪器，常用于工业、实验室等场合。

正确使用露点仪可以保证生产过程中的质量和安全，因此掌握正确的测量方法非常重要。

本文将介绍露点仪的测量方法，包括准备工作、操作步骤、注意事项等方面，希望对使用者有所帮助。

二、准备工作1. 确定测量目的：在进行露点仪测量之前，需要明确自己的测量目的以及所需数据精度和范围。

这有助于选择合适的仪器型号和设置合适的参数。

2. 检查设备：检查露点仪是否正常运转，并确认所有零部件是否齐全。

特别是需要检查传感器是否干净无污染，并且不要触碰传感器表面。

3. 校准设备：进行校准是确保测量精度和可靠性的关键步骤。

根据厂家提供的校准方法进行操作，并记录校准结果。

4. 准备样品：根据实际需求选择需要测试的样品，并按照标准操作将其装入样品室。

需要注意的是，样品室中的温度和压力应该稳定，并且与待测空气相同。

三、操作步骤1. 打开仪器：按照说明书操作，将露点仪打开并预热至一定温度。

一般情况下，预热时间为20-30分钟。

2. 设置参数：根据实际需求设置合适的参数，包括温度、压力、单位等等。

需要注意的是，在设置参数时应该避免超出仪器的测量范围。

3. 开始测试：将样品室中的空气引入露点仪中，并开始测试。

测试过程中需要保持样品室中的温度和压力稳定，并且避免外界干扰。

4. 记录数据：在测试完成后，记录所得数据并进行分析。

需要注意的是，在记录数据时应该标注清楚测试时间、样品名称、所得结果等信息。

5. 清洗设备：在使用完毕后，及时清洗设备并存放到安全干燥处。

特别是需要注意传感器表面是否干净无污染。

四、注意事项1. 避免外界干扰：在进行露点仪测量时需要保持环境稳定，并且避免外界干扰。

例如，需要避免在强光照射下进行测量，避免在空气流动较大的场合进行测量等等。

2. 校准设备：校准设备是确保测量精度和可靠性的关键步骤。

建议定期进行校准，并记录校准结果。

3. 避免触碰传感器表面：传感器表面是露点仪中最为关键的部分，需要特别注意保护。

Instruction Manual Alpha Moisture SystemsAlpha House96 City RoadBradfordBD8 8ESEnglandTel: +44 1274 733100Fax: +44 1274 733200Email: info@Web: Instruction ManualFor theModel DSP-Ex Portable Dewpoint Meter1458 DSP-Ex User ManualIssue 304/12/2009IndexInformation (2)1 General2 Features (2)Information (2)3 Safety3.1 Warnings (2)3.2 Instructions specific to hazardous area installations (3)3.3 Special Conditions of Use - (denoted by the X after the certificate number) (3)Exposure (4)3.4 Pressure4 Installing the Air/Gas Sampling System (4)4.1 Gases to Avoid (4)4.2 Piping installation Schematic (5)4.3 Piping Schematic Component Index (5)5 Purging the sample connection (6)Start-up (6)6 InstrumentOperation (7)7 NormalVariables (9)8 Adjusting9 Selecting Engineering Units (10)Calibration (12)10 FactorySensor (12)11 The12 Batteries (12)13 Anti Static Carrying Case (13)14 Transit Case - FOR USE IN SAFE AREA ONLY (13)1 General Information• The Model DSP-Ex Automatic Dewpoint Meter is a fully self-contained portable instrument, specifically designed to measure the moisture content of air or gas on a spot-check basis.• The instrument is operated with its own internal batteries and requires no external power source.• The read-out of moisture content is on a dot matrix LCD, in any one of several selectable engineering units.• The unique measuring head is designed to keep the sensor dry when the instrument is not in use, making spot checks a simple and speedy process with minimum air or gasusage.• Model DSP-Ex utilises Alpha Moisture Systems advanced dewSmart sensor, which allows complete interchangeability of sensors and ranges.• The calibrated measuring range is stored within the sensor and is readable from the analyser display (see page 2, item 2).• Details of normal operation, engineering unit selection, sensor data and configuration of the instrument are described within this manual.2 Features• 40 x 2 character dot matrix LCD display.• Tactile membrane keypad, coupled with an easy to operate user interface.• Operates from internal Duracell Alkaline “C” cells.• 7 selectable moisture units (ºC, ºF, ppm(V), ppm (W), ppb(V), g/m3 and lb/MMSCF).• Low battery indicator.• Display Contrast control.3 Safety InformationRead the safety information below, before use.3.1 WarningsThe DSP-Ex is intrinsically safe. Therefore it can be used in hazardous areas.Certification: ATEX Coding – II 1GEx ia IIC T4 Ga (Ta = – 20ºC to +37ºC)Ex ia IIC T3 Ga (Ta = – 20ºC to +50ºC) It is the responsibility of the user to ascertain the suitability of the DSP-Ex for use inhazardous areas. Risk assessments should be performed prior to use, taking into account the DSP-Ex certifications, the ‘X’ rating of the DSP-Ex, and the location and the gasbeing monitored etc.3.2 Instructions specific to hazardous area installations(Reference European ATEX Directive 94/9/EC, Annex II, 1.0.6.) The following instructions apply to equipment covered by certificate 02ATEX2132X:• The certification marking is as follows:• The equipment may be used in zones 0, 1 and 2 with flammable gases and vapours with apparatus groups IIA, IIB & IIC and with temperature classes T1, T2, T3 andT4.• The equipment is only certified for use in ambient temperatures in the range -20o C to +50o C and should not be used outside this range• The certificate number has an ‘X’ suffix, which indicates that the certificate contains one or more special conditions for safe use. Those installing or inspecting theequipment should have access to this section of the certificate.See SpecialConditions of Use below.• Note that only the batteries specified on the equipment may be used.• The equipment has not been assessed as a safety-related device (as referred to by Directive 94/9/EC Annex II, clause 1.5)• Repair of this equipment shall be carried out by the manufacturer or in accordance with the applicable code of practice.3.3 Special Conditions of Use - (denoted by the X after the certificate number)Under certain extreme circumstances, external non-metalic parts of this equipment may generate an ignition-capable level of electrostatic charge. Therefore, when it is used for applications that specifically require group II, category 1 equipment, the equipment shall not be located where the external conditions are conductive to the build-up of electrostatic charge on such surfaces. Additionally the non-metallic parts of the equipment shall only be cleaned with a damp cloth.Also the apparatus enclosure is made from light metals and presents a risk of ignition due to impact or friction. The apparatus must therefore be carried in the (antistatic) protective carry case supplied when being transported in a hazardous area.3.4 Pressure ExposureThe maximum pressure to which the telescopic measuring head is exposedmust not be more than0.3barg, 4.35psig, 30kpag or 0.3kg/cm2gExposing the measuring head to higher pressures may damage the instrument and result in injury to the operator or other personnel in the area4 Installing the Air/Gas Sampling SystemThe piping installation schematic diagram (see section 4.2) shows all components, which could be used in a dry gas measurement application although not all the items shown will be required for every installation.Care should be taken to ensure that the sample presented to the DSP-Ex is notcontaminated with any component that will damage, contaminate or affect the DSP-Ex in a way that will impair the unit’s accuracy.It is strongly recommended that the sample should not contain particulate matter, oil,hydrocarbon or any other condensate. If these components contaminate the sample system and/or the measuring sensor, the DSP-Ex response time will be lengthened, although the sensor calibration will not be effected.The flow rate, although not critical to the sensor measurement, should be low enough to avoid abrasion to the sensor surface without being so low as to extend the DSP-Ex response time to an unacceptable level. In general, a flow rate of between 5 and 8 litres/min at NTP will give the right balance.The sensor used in the DSP-Ex is a variable capacitor, which is directly affected bychanges in partial pressure of water vapour, and these changes, that are proportional to the dew/frost point temperature, are displayed on the instrument indicator.4.1 Gases to AvoidThe moisture sensors are suitable for many different industrial and research applications.Most gases can be checked for their moisture content with no need for the calibration to be altered when changing between different gases, as the sensor operates only with reference to the water vapour content. There are, however, some gases that must be avoided, as they are not compatible with the material of construction of the sensor. Ammonia (NH3), Ozone(O3) and chlorine (Cl) must be avoided at all times, even in small quantities.Hydrogen chloride (HCl) also attacks the sensors very quickly. Some, less aggressive, acidic gases, such as sulphur dioxide (SO2), can be monitored, as long as the moisture content is low, generally less than 100ppm(v). If in doubt, please ask your supplier.Sulphur hexaflouride (SF6) has no effect on the sensor. If the gas has been exposed to arcing, however, it is possible that various acidic species will have been formed that will corrode the sensor. When testing SF6 that may have been arced, therefore, an acidity test should be carried out first; if the gas proves to be acidic then the moisture test should not be carried out.4.2 Piping installation Schematic4.3 Piping Schematic Component Index1. Sample Isolation Valve - This is a recommended item as it allows access to the samplesystem without interrupting the main process line.2. Sample Tube – This should be stainless steel for dry air or gas applications but copper orcarbon steel can be used where wetter gases are to be measured. If any section of thesample tube must be flexible then PTFE should be used. In most cases, 3mm OD (1/8”)is sufficient as it provides good system response time with minimum flow. 6mm OD(1/4”) tube can be used where pressure drops across the 3mm tube are too high3. Filter Unit – A filter unit is recommended when the samples are likely to containparticulate matter. If the air/gas sample contains heavy hydrocarbon condensate, thefilter must be of the coalescing type with a drain. The filter unit should be positioned as close to the sample point as practical.4. Pressure Reduction Valve or Pressure Regulator – the sample is measured atatmospheric pressure requiring that valve 4 is fitted to the system.5. Flow Control Valve – This can be a separate item or combined with the flow indicator(8).6. Sample Connection7. DSP-Ex.8. Flow Indicator – The recommended sample flow is 5 to 8 L/M.9. Sample Exhaust – The exhaust is vented to atmosphere or returned to an atmosphericpressure line.5 Purging the sample connectionRefer to the sample system schematic in section 4.2.It is advisable to carry out an initial purge of the sample loop, before connecting theDSP-Ex, in order to avoid the possibility of sensor damage on start-up.Open the sample isolation valve (1) slowly, until a there is a small flow of air/gas atatmospheric pressure from the pressure reduction valve (4) into DSP-Ex line. Allow the air/gas to exhaust through the sample connection (9).The DSP-Ex is not flow sensitive however the sample flow needs to be enough to purge the sensor head effectively, so anything less than 1 litre/min would mean that the instrument would take too long to settle to a stable reading. The flow should also not be so high that the gas velocity could physically damage the sensor or cause backpressure in the sensor head, so should not exceed about 8 litres/min.Allow this purge to continue for 2 minutes to remove any residual moisture from thesample pipe work and components. Check that no liquid or particulate contamination,which could damage the sensor, is passing through the sample pipe. Directing the sample onto a piece of white paper (such as a filter paper) will make it easier to see any dust or oil mist in the sample.6 Instrument Start-upThe standard factory settings are such that the instrument will display the moisture content in °C Dewpoint has the auto switch-off facility activated and the display contrast set at a mid-point.The other facilities and information available from the sensor and instrument aredetermined by the range of sensor in use, it's calibration data and the hardware of theinstrument itself.To access the available information and change variables use the following procedure:- • Switch the instrument on by pressing the I/0 key once.• The display will read the word INITIALISING. This is the normal start-up routine during which the functions of the instrument and integrity of the sensorcalibration data are verified.• The display will then read INSTRUMENT OK. This confirms that allinstrument functions are working normally.• The display will then read CALIBRATION DATA OK. This confirms that normal communications with the sensor have been established and that theintegrity of the calibration data, held within the sensor, has been verified.• The display will then read the moisture content of the air/gas surrounding the sensor in °C Dewpoint, (or the equivalent in other engineering units if soselected).7 Normal OperationIn order to take moisture content readings of air or gas, having pre-selected the required units of measurement, use the following procedure:-1) Locate the instrument in a convenient position, as close as is practical to the samplepoint and move the handle from its carrying position to allow clear operation of the telescopic measuring head.NOTE. The position of the handle is adjustable, in 300 steps, by pressing the two blackbuttons, one at each pivot point, and manually positioning the handle. Releasing thebuttons allows the handle to lock into the required position.It is not important which position the instrument is placed in, as it will operate in any attitude.2) Switch the instrument ON by pressing the key marked I/0.NOTE. When the instrument is switched ON, the instrument will go through its initialisingroutine and data verification procedures described above. This routine takesapproximately 10 seconds, after which time the instrument will display the moisturecontent of the air or gas surrounding the sensor, in whatever engineering units have beenselected. This will happens every time the instrument is switched ON.3) The sample tube supplied is fitted with a Female Swagelok quick connect coupling, atone end, for connection to the male connector positioned below and to the left of themeasuring head. To make this connection, simply push the two halves of the connector together and allow the locking ring to locate. To disconnect this coupling push thelocking ring towards the instrument panel and the two halves will spring apart.The other end of the sample tube is supplied with a 1/8" NPT male connector whichshould be adapted to fit the sample point connector.NOTE. It is important to note, at this time, that the material used for the sample tubeis critical, especially when measuring very low moisture levels. The ideal material isstainless steel but this is normally impractical for a portable instrument. Where flexibletube is to be used, the preferred material is PTFE (Teflon). This offers a reasonabledegree of flexibility and has good resistance to external moisture ingress. The sampletube supplied with the instrument is ideally suited to this purpose.4) Open the sample valve, at the sample point, to allow a small flow of air or gas throughthe system, at atmospheric pressure. The actual flow is unimportant, as the measuring sensor is not flow sensitive, but it is suggested that a flow of between 5 and 10 L/min is an ideal compromise between minimum gas usage and system response speed.5) Allow the instrument and pipework to purge and then restrict the sample exhaust, fromthe instrument, with a finger. This will cause the telescopic section of the measuring head to extend from the front panel of the instrument under the pressure of air or gas. If there is insufficient gas pressure to extend the head, grip the outer knurled section of the head and, while twisting clockwise, gently extend the head by pulling it out from the front panel, while keeping the sample exhaust blocked. When the head is fully extended, remove the finger from the sample exhaust and allow the sample to flow through the measuring head.6) The display will indicate the change in moisture content surrounding the sensor.Observe the display and when there is no further change in reading; the displayed value is the gas moisture content.NOTE. If there is any uncertainty as to whether equilibrium has been achieved in thesystem (pipe work and measuring head), which is necessary to reach an accuratemeasurement, a simple test can be carried out as follows:-• After the display has stopped moving, increase the sample flow, slightly.• Observe the display.• If the displayed value remains constant the reading is accurate.• If the displayed value begins to fall, the system was insufficiently purged and water vapour is still outgassing from the internal surfaces of the sample pipework or measuring head OR there is a leak at the sample valve or one of theconnections.It is very important to note that if there is a leak in any part of the system, water vapour will defuse, from the ambient air, into the sample, even though the gas is flowing out of the faulty connection.7) When the measurement is complete,• Close the measuring head by manually pushing the extended section back towards the panel front and switch the instrument OFF.NOTE. Ensure that the measuring head is fully closed. Failure to do so will cause theinternal desiccant to become wet and impair the efficiency of operation of the instrument.• Remove the sample by closing the valve at the tapping point,• Disconnect the sample tube from the instrument and sample point.This completes the procedure and the instrument can be removed to the next test pointor stored until required again.NOTE. If the reading taken from the instrument is in 0C or 0F dewpoint, it is important toremember that this value is at 1 bar A pressure. If the dewpoint is required at any otherpressure, the dewpoint calculator, supplied with the instrument, should be used to calculatethat dewpoint. Instructions for use are printed on the calculator face.8 Adjusting VariablesTo read Sensor and Instrument information, change the display contrast andenable/disable the automatic shut-down facility:-• Press the keys marked and together and hold pressed forapproximately 4 seconds.The display will read SENSOR INFORMATION.• Press the key marked once.The display will show the sensor (probe) serial number.• Press the key marked once more.The display will show the calibrated range of the sensor installed.• Press the key marked once more.The display will show the calibration date of the sensor installed.• Press the key marked once more.The display will show the suggested date of recalibration of the sensorinstalled. Normally 12 months after the calibration date.• Press the key marked once.The display will show the instrument type and software version• Press the key marked once more.The display will show LCD CONTRAST- LIGHTER DARKERAt this point the contrast can be adjusted to the desired level by pressing eitherthe key marked to lighten the display or to darken the display.NOTE: The contrast is incremented by the keys and does not scroll by holding pressed.• When the contrast level is satisfactory press the key marked once more.The display will show AUTO SHUT DOWN together with the status of thisfacility, either ON or OFF.To put this facility ON (enable) pressTo turn it OFF (disable) pressNOTE: When the AUTO SHUT DOWN is ON, the instrument will automatically switchOFF if no keys are pressed within a period of 5 minutes.• When the variables have been set to the desired positions press the k ey marked . This fixes the settings within the instrument and on each subsequent start-up these levels will be maintained.The display will now be shown °C Dewpoint (or equivalent).9 Selecting Engineering UnitsTo change the displayed engineering units from ºC Dewpoint to either ºF Dewpoint,PPM(V), PPB(V), g/m3, lb/MMSCF or PPM(W), use the following procedure:- • Press the key marked and hold pressed for approximately 4 seconds.The display will show the letters SU (select units) in the top right hand corner.• Subsequent presses of the key marked will scroll the display through the options of engineering units available.The order in which the engineering units will appear on the display and theirdefinitions is as follows:-°C Dewpoint: The temperature at which Condensation or Frost forms ifthe gas is cooled, expressed in degrees centigrade.It is important to note that the term DEWPOINT iscommonly used to include frost point and all readingsbelow 0ºC are in fact measurements in equilibrium overice.°F Dewpoint: As above but expressed in degrees Fahrenheit.ppm(V): The volume of water vapour per total volume of gasexpressed as parts of water vapour per million parts ofgas.ppb(V): As ppm(V) but expressed in parts of water vapour perbillion parts of gas.This unit is only used in cases where the moisture contentof the gas is less than 1ppm(V) (1000 ppb(V)). At levelsabove 1000 ppb(V) the instrument display will show OUTOF RANGE if switched to the PPB(V) section.g/m3: Mass of water per unit volume of gas expressed as gramsof water per standard cubic meter of gas.lb/MMSCF: As g/m3 but expressed as pounds of water per millionstandard cubic feet of gas.ppm(W): Similar to ppm(V) but with reference to mass (weight)rather than volume. In this case the ratio of weightschange with the molecular weight of the carrier gas.• When the required units of measurement are displayed, press to enter this information into the instrument.The instrument will then display the moisture content in the selected engineering units on each subsequent start-upWhen ppm(W) is selected there is an option available to select one of several common gases or a variable setting where the molecular weight of any other gas can be entered. This option is denoted by the letters SG (Select Gas) that will be seen in the top right hand corner of the display.• The common gas types installed are AIR, ARGON, NITROGEN, CO2, SF6 & H2. Scrolling through these options is achieved by pressing the key.• Following the end of the list shown above, the screen will display PPM(W) Mol Wt: X; where X is any number between 0 and 99.• If ppm(W) is the required unit of measurement and the gas to be measured does not appear on the installed list, then the molecular weight of this gas should beinstalled by pressing the key marked which indexes the number (mol weight) between 0 and 99 (1 press = 1 digit).If the key is pressed at 99 then the number reverts to 0.• When the required gas or molecular weight has been selected, press the key marked , at this point the letters SG will disappear. This installs the selected units into the instrument programme and the instrument will start-up in these units at every subsequent 'start-up'.NOTE. If when the key is pressed to select units in ppm(W), the display alreadyshows the correct gas, simply press again to confirm this setting.Other units can be installed by reselecting and storing, using the above procedure.10 Factory CalibrationComparing the readings given from the instrument with those obtained from a standard, traceable dewpoint analyser performs factory calibration. The traceability is to the British Standard Moisture Generator held at the National Physical Laboratory, London. Thesecomparative results are detailed in the Certificate of Test and Calibration supplied with the instrument.11 The SensorConstruction of the sensor starts with an ultra-high purity aluminium wire, which iscoated with a hygroscopic layer and finally covered by a film of porous gold. Thegold film and the aluminium core form the plates of the capacitor. The capacitancevalue, and the change in capacitance over the measuring range of each sensor ismany times greater than any other device, resulting in a system which can operate atlow frequency (50 or 60Hz) without any risk of interference or pickup from externalcables or other sources.Some of the water vapour molecules in the atmosphere surrounding the sensor willenter the dielectric layer where, due to the extremely small size of the pores, theirBrownian motion will be limited, their energy will consequently be reduced and theywill condense into liquid water. Due to the very high dielectric constant of water(about 80) compared with the other vapours, which may be present, this produces amarked change in the dielectric value of the sensor, which is then measured by theanalyser. A dynamic equilibrium will exist between the water vapour outside thesensor and the condensed water within the pores. This equilibrium is maintained,and the response time of the sensor can generally be considered to be at least as quickas the system into which it is installed.Molecules larger than water vapour (one of the smallest gas molecules) cannot enterthe pores, making the sensor resistant to many contaminants and specific to watervapour pressure regardless of the carrier gas.12 BatteriesThe Model DSP-Ex is powered by 6 x C size batteries.The typical battery life is in excess of 250 hrs. continuous operation.The analyser will display, in the top left hand corner of the screen, the letters LB (LOW BATTERY) when the batteries are to be changed.At the point when the LB sign is displayed there is approximately 2 hrs. battery life left before the sign changes to VLB (VERY LOW BATTERY).At the point when the VLB sign is displayed the batteries will only power the instrument for a further 30 minutes, at which time the instrument will shut-down totally, and will not be operational until new batteries are installed.If the instrument is switched ON after the very low battery automatic shut-down has taken place it will automatically switch itself OFF again.Access to the batteries, for replacement purposes, is gained by firstly removing the cover plate, on the back panel of the instrument, using the Allen Key provided and then unscrewing the covers from both of the battery holders.Fit new batteries as shown on label adjacent to the battery holders, replace the covers and refit the cover plate.13 Anti Static Carrying CaseThe anti static carrying case supplied with the DSP-Ex has been designed for use in intrinsically safe areas. The DSP-Ex unit can be fully operated within the carrying case. It is recommended that the DSP-Ex is left in the carrying case whenever in the intrinsically safe areas.14 Transit Case - FOR USE IN SAFE AREA ONLY(If Supplied)The transit case is designed specifically to protect the instrument during transportation and storage it is not indented that the transit case be used in intrinsically safe areas.The sample tube, dewpoint calculator and Allen key to remove the battery carrier cover plate, are housed in the hinged section inside the lid of the transit case.The transit case carrying shoulder strap and keys to lock the case are also housed in the hinged section inside the lid.Access to this storage compartment is achieved by pulling the small leather strap,positioned near the outer edge of the hinged cover, to release the two spring catches, which secure it.Ensure that both catches are secure when closing the cover of the compartment toguarantee secure storage of the items held within.。

英国sadp露点仪原理
英国sadp露点仪是一种用于测量空气中的湿度的仪器。

它的原理是基于露点的概念，即当空气中的水蒸气饱和时，开始凝结成水或其他形态的现象。

这种仪器通过一系列的传感器和控制器来测量空气中的温度和湿度。

传感器测量空气的温度，控制器则根据温度和湿度的关系来计算出露点温度。

露点温度是指在给定的压力下，空气中的水蒸气开始凝结的温度。

当空气中的水蒸气量超过了一定的限度时，就会出现露点温度。

sadp露点仪的工作原理可以简单描述为以下几个步骤：首先，传感器测量空气中的温度和湿度，然后控制器根据这些数据计算出露点温度。

接下来，控制器将露点温度与预设的阈值进行比较，并根据比较结果来进行相应的操作，例如触发报警或控制其他设备的运行。

该仪器的应用范围非常广泛。

在工业领域中，sadp露点仪常用于监测空气中的湿度，以确保生产过程的稳定性和质量。

在气象领域中，它可以用于预测天气变化和研究气候变化。

在航空航天领域中，该仪器可以用于控制飞机和导弹中的湿度，以确保设备的正常运行。

英国sadp露点仪是一种基于露点原理的仪器，可以准确测量空气中的湿度。

它的工作原理简单明了，应用广泛，对于许多行业和领域都具有重要意义。

通过使用该仪器，我们可以更好地了解和控制湿
度，从而提高生产效率和产品质量。

计量标准技术报告计量标准名称精密露点仪标准装置计量标准负责人建标单位名称（公章）填写日期目录一、建立计量标准的目的………………………………………………………………… ( )二、计量标准的工作原理及其组成………………………………………………………( )三、计量标准器及主要配套设备…………………………………………………………( )四、计量标准的主要技术指标……………………………………………………………( )五、环境条件………………………………………………………………………………( )六、计量标准的量值溯源和传递框图……………………………………………………( )七、计量标准的重复性试验………………………………………………………………( )八、计量标准的稳定性考核………………………………………………………………( )九、检定或校准结果的测量不确定度评定………………………………………………( )十、检定或校准结果的验证………………………………………………………………( ) 十一、结论…………………………………………………………………………………( ) 十二、附加说明……………………………………………………………………………( )七、计量标准的重复性试验温湿度表，编号为：0203，测量时环境温度为60%RH ，在本装置正常工作条件下，在其60%RH 测量点上等精度重复测量10次，测量结果如下：序号 测量值x i （g ） u i＝x i －x (mg)u i2 (mg)1 60 -0.5 0.252 61 0.5 0.253 60 -0.5 0.254 61 0.5 0.25 5 60 -0.5 0.256 61 0.5 0.257 60 -0.5 0.258 61 0.5 0.259 60 -0.5 0.25 10610.50.25x60.5==-=∑∑==-91101212i ini xi Un xs 0.5%RH结论：1. 经过温湿度表测量结果的不确定度U 95＝2.1%RH2. 在重复性条件下，温湿度表重复测量10次，其重复性误差为s=0.53%RH3. 由于s=0.53%RH 满足 JJG205-2005要求 计量标准的重复性考核合格,该计量标准重复性可靠满足JJG205-2005计量标准考核规范的要求。

在线露点仪安全操作及保养规程在线露点仪是一种常用的检测设备，可以用于对物体表面的露点进行精确测量。

为了保障仪器的正常运行和使用者的安全，必须严格按照以下的安全操作和保养规程进行操作。

安全操作规程1. 操作前的准备工作在使用在线露点仪之前，需要进行以下的准备工作：1.检查仪器的外观是否完好无损，仪器是否处于正常状态。

2.仪器的电缆、接头等是否完好，无损坏或腐蚀。

3.规范操作流程，根据实际情况设定合理的测试范围和测试参数。

2. 操作过程中的注意事项1.严格按照仪器使用说明进行操作，不能擅自改变任何设置或标准。

2.操作过程中严禁冲击、振动或摇晃仪器，避免机械撞击、刮擦导致仪器损坏。

3.操作人员应当佩戴防静电手套、防静电鞋、帽子等防护用品，避免静电对仪器的影响。

4.严禁将水、化学品等溅到仪器表面，以免造成损坏。

5.使用过程中注意防护任何可能产生危险、或可能给人员造成不良后果的因素。

3. 操作后的处理工作1.在操作完成之后，需要及时将仪器清洁干净，以免污染仪器表面。

2.仪器需存储在干燥、通风的地方，不能存放在潮湿、高温、多尘、强磁场或有腐蚀性等环境中。

3.仪器需要定期校准和检修，避免因长期使用而导致的误差或故障。

保养规程在线露点仪需要进行定期的保养，以确保仪器能够精确测量，并延长仪器的使用寿命。

1. 仪器外部清洁1.在线露点仪应该放在干燥、无尘的环境中。

2.在使用仪器前，需要清洁仪器的外表面，避免灰尘或污垢附着进入到仪器内部，影响仪器测量的准确性。

3.清洁仪器可以使用软布或干燥的软刷子，避免使用任何腐蚀性或有机溶剂等，以免损坏仪器表面。

2. 维护仪器内部储存器1.在线露点仪内部有存储器件，需要定期检测和清理，否则在测量数据时可能会出现误差。

2.检测储存器的周期与使用环境有关。

通常建议每个季度检测一次，并定期更换或更新存储器设备。

3. 定期维护1.需要定期进行仪器的校准和检修工作，避免因长期使用而导致的误差或故障。

精密露点仪是怎么操作的？操作时要注意哪些事项？精密露点仪是目前湿度测量的精品级产品。

它引进国外传感器，采用阻容法原理，通过电容型高分子聚合物，薄膜测湿传感器及电阻型测温传感器，测出相对温度和表面温度，从这两个参数计算出露点。

是替代进口仪器的*产品。

精密露点仪主要应用于石化，天然气，干燥气和压缩气，发电机冷却氢气，变压器和高压开关绝缘气，焊接气以及船舶和航空用的氧气。

结构原理：内芯为一高纯铝棒，表面氧化成氧化铝薄膜，其外涂一层多空的金膜，该金膜和内芯之间形成电容，由于氧化铝薄膜的吸水特性，当水蒸汽分子被吸入其中时，导致电容值发生变化，检测并放大该电容信号即可得到湿度大小。

精密露点仪操作方法：1、先打开电源，仪器先进行自校，自校结束进入测量状态.2、仪器自校的同时，把本仪器配套的测试管道与所要测量开关的开关接头连接好，再把开关接头与被测开关连接好。

3、关闭流量调节阀，把测试管道与仪器的进气口相连，这时显示屏上显示的压力即是被测开关里的气体的压力。

4、开始测量，打开流量调节阀，把调节流量在0.5升/分左右，最大不要超过0.8升/分，这样就进入测量状态，测量的时间大约在8分钟左右。

5、测量结束时，如要打印数据只要按下打印键，并输入被测的设备编号后，按下确认键后，仪器就开始打印。

最后关闭流量调节阀，再将测试管道从仪器进气口上取下，最后取下开关接头。

6、关闭电源。

把测试管道和开关接头放好，整个测量结束。

精密露点仪使用注意事项：1、仪器应放置在安全位置，放止摔坏，避免剧烈震动。

2、勿测有腐蚀性的气体。

3、探头使用一定时间应清洗并校验，校验期间隔为一年.到需要校验时，请与我公司联系。

4、调节气体流量时，控制针型阀应慢慢打开，使流量指示在0.5-0.6升/分钟。

如果流量超过1升/分钟，液晶上流量显示已超限的提示，这时应减小流量到规定值。

5、仪器使用一天后，应及时充电，充电时只需将电源线接入220V插座，无需打开电源开关，仪器将自动充电，充电时间一般为5个小时以上。