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8.3

Wood moisture

The Wöhler A 550 can perform a wood moisture test based on a resistance measure-

ment. In order to obtain an exact measurement, the respective material will be consid-

ered.
As the measured value depends on the material temperature, the meter will perform an

automatic temperature compensation on the basis of the temperature entered by the

user.

NOTE!

It is necessary to connect the Wood moisture probe Wöhler A 550 to the analyzer be-

fore performing the wood moisture test.

ATTENTION!

Before starting the test, check that the needles/electrodes are not bent. If the elec-

trodes are bent, the distance will not be 25 mm any more, so that the measurement

result may not be correct.

8.3.1 Theoretical background

The resistance measurement uses the needles of the wood moisture probe. The meter

will automatically determine the wood moisture

. This is the water mass m

bound in

the fuel and related to the absolute dry fuel mass m

according to equation (1):

𝑢

𝑚

𝑤

𝑚

𝐵

∙

100%

Equation 1

Explanation:

= wood moisture

mw = water mass bound in the wood
mb = absolut dry fuel mass

NOTE!

According to the above equation the wood moisture may be higher than 100 %.

Содержание A 550

Страница 1: ...The Measure of Technology Operation Manual Flue Gas Analyzer W hler A 550 W hler A 550 L W hler A 550 H Best Nr 23442 2018 02 08...

Страница 2: ...Values 14 3 3 Technical Data 15 4 Setting up the instrument 16 4 1 Component Explanation 16 4 2 Probes and sensors 19 4 3 Tightness test 21 4 4 Display 22 4 5 Gas sampling path W hler A 550 23 5 Getti...

Страница 3: ...de 48 8 6 Manifold Pressure 49 8 7 Temperatures 50 8 8 4 Pa Test 51 8 9 Logger Measurement W hler A 550 only 56 8 10 SETUP 59 8 11 Calibration 62 9 Customer data 62 9 1 Set up a new customer 62 9 2 Sa...

Страница 4: ...Water Stop Filter 69 12 3 Sensor diagnosis and replacement 70 12 4 Replacing the battery 74 12 5 Replacing the electrodes of the wood moisture probe 76 13 Analyzer check 76 14 Warranty and Service 77...

Страница 5: ...ages caused by not following this manual 1 2 Notes WARNING Not following this warning can cause injury or death ATTENTION Not following this note can cause permanent damage to the device NOTE Useful i...

Страница 6: ...ion Pressure adapter Charger with micro USB cable 1 Water stop filter 1 Coarse Filter W hler A 550 L Probe and hose as sembly 1 7 m Flue gas probe 295 mm Wood Moisture Probe option Charger with micro...

Страница 7: ...n When the instrument is delivered the battery is always deactivated 1 6 Information on disposal Electronic equipment does not belong into domes tic waste but must be disposed in accordance with the a...

Страница 8: ...strong magnets to fix it during the measurement The magnetic field may harm heart pacemakers hard disks data mediums magnetic stripe cards controls etc Keep sufficient distance to magnet sensitive ob...

Страница 9: ...es 4 Pa Test Wood moisture Spillage test Tuning guide Possible number of sen sors 5 3 Functionality Fresh air pump search for the hotspot during fresh air calibration is possible Start Stop Button Re...

Страница 10: ...to 4 000 Vol ppm resolution 1 Vol ppm Accuracy 20 ppm 400 ppm otherwise 5 of reading Carbon monoxide in flue gas Option for W hler A 550 Unit ppm of flue gas volume dry conditions Meas principle Elect...

Страница 11: ...ol ppm resolution 1 Vol ppm Accuracy 5 vol ppm 100ppm otherwise 5 of reading Nitrogen dioxide NO2 in flue gas option Unit ppm of flue gas volume dry conditions Measurement principle electrochemical se...

Страница 12: ...a Accuracy 2 Pa 40Pa otherwise 5 of reading Flue gas temperature TS Unit C Measurement principle Thermocouple NiCr Ni Range 20 0 C to 800 0 C resolution 0 1 C Accuracy 0 133 C 2 C 133 to 800 C 1 5 of...

Страница 13: ...el mass Measurement principle resistance measurement Range 10 0 to 40 0 resolution 0 1 Accuracy 40 of reading wood temperature 5 to 25 C lifetime of the electrodes Depending on the frequency of utiliz...

Страница 14: ...O2 in Vol Range 0 CO2max resolution 0 1 COc SO2c NOc NO2C air free corrected Default 0 oil and gas Dpt C Dew Point in the flue gas Medium soot level Soot number 0 1 Excess air coefficient Lambda e g 1...

Страница 15: ...cklight Charging time for a full charge Approx 7 hours Charging cycles of the batteries After 500 charging cycles at least 70 of the capacity are still available Storage Temperature 20 C to 50 C Opera...

Страница 16: ...t Explanation 1 On off button 2 Condensate trap 3 Opening handle for the condensate trap 4 Probe compartment 5 Opening handle for the probe compart ment NOTE Open the probe compartment by pulling down...

Страница 17: ...er A 550 9 Gas Probe 10 Union nut 11 Plexiglas plug with Coarse Filter On Off key 8 Fig 4 Pressing the ON Off Key during the measurement only W hler A 550 It is possible to start and stop the measurem...

Страница 18: ...ture probe connector 16 Negative pressure connector 17 Loud speaker for alarm signals Fig 6 Probe compartment Probe compartment 18 Gas probe connector Fig 7 Interior of the probe compartment W hler A...

Страница 19: ...ing the flow speed with adapter Fig 9 Flexible capillaries Flexible capillaries for the 4 PA test an adapter is needed Always use the CHP filter W hler A 550 article 5523 when measuring the flue gas o...

Страница 20: ...t 20 Fig 12 Ambient Temperature Plug Ambient Temperature Plug Fig 13 Ambient Temperature Probe Ambient Temperature Probe W hler A 550 185 mm Fig 14 Wood Moisture Probe Wood Moisture Probe Fig 15 Spill...

Страница 21: ...ueeze the ball pump part 1 2 Plug the ball pump part 1 on the gas probe part 2 3 Release the ball pump After the ball pump has been released it may not fill with air or only fill very slowly Otherwise...

Страница 22: ...vided into different segments The fuel is shown in the topline on the left The currently selected customer and measurement mode are shown on the right of the fuel Date and time system diagnostic statu...

Страница 23: ...Setting up the instrument 23 4 5 Gas sampling path W hler A 550 Fig 18 Gas sampling path W hler A 550...

Страница 24: ...protection pump The sensors are protected against condensate by a four step filter conditioning The first step is the coarse filter in the probe handle Most of the particles will be re moved from the...

Страница 25: ...e black probe handle Fig 20 Push transport lock to the left batteries activated Push transport lock to the right batteries deactivated Before the first start up activate the batteries by pushing the t...

Страница 26: ...the recharger to the USB port at the bottom of the analyzer During the charging process a jack symbol will blink in the upper right part of the screen and the ON OFF key will blink red NOTE Recharging...

Страница 27: ...arse filter 5 2 1 Connecting the probe Use different probes depending on the measurement to be done one hole probe or multi hole probe Connect the probe as follows Fig 23 Connecting the probe Remove t...

Страница 28: ...oned on top of each other The connector must audibly engage To remove the con nector pull the snap shell down Guide the cable through the cable duct Close the probe compartment as follows Pull down th...

Страница 29: ...tomatically start to calibrate the sensors with fresh air During the calibration the user can already search the hotspot and measure the flue draft at the same time Press PD to zero the draft sensor...

Страница 30: ...enter the analyzers self diagnosis mode see chapter 12 3 Customers Click on the Customers icon to finish the hotspot search and enter the Customers menu The Cus tomers Menu allows to set up a new cos...

Страница 31: ...ime the purge pump will turn off and the sample pump will turn on 6 3 1 Readings screen Al readings measured and computed values will be shown continuously in the readings segment NOTE The user can ch...

Страница 32: ...rrected air free NO2 ppm mg m 3 Nitrogen dioxide NO2c ppm mg m 3 mg kWh mg MJ lbs mmbtu g GJ Nitrogen dioxyde corrected air free SO2 ppm mg m 3 Sulfur dioxide SO2c ppm mg m 3 mg kWh mg MJ lbs mmbtu g...

Страница 33: ...our finger over the screen Click on a fuel The fuel will be selected for the next measurement After turning off and on the analyzer the last selected fuel will be active again 6 3 3 Setting the fuel p...

Страница 34: ...p the measurement and hold the values Click Back to return to the numeric screen Copy values Click on the Copy values icon to copy the readings into the clipboard The Copy val ues icon will appear in...

Страница 35: ...old value is exceeded During the measurement the pump will suck the gas from the CO sensor to avoid an excessive load Meanwhile the gas pump will continue to work so that the measurement can continue...

Страница 36: ...pped click on Purge on In this case the sensors will be exposed to fresh air without the need to remove the probe from the stack Accept The Accept icon will only appear if the meas urement is stopped...

Страница 37: ...h a checkmark Those tests that have already been saved will be marked by a lock Select a measurement to delete print or save it Customer Logo and Technician last item will always be marked by a checkm...

Страница 38: ...W hler A 550 on the Thermoprinter W hler TD 100 NOTE Place the printer with the IR receiver toward the IR interface of the analyzer After printing the analyzer will enter the meas urement mode again...

Страница 39: ...ll be the measurement date and the measurement time After the measurement click on Accept Click on the Save icon to save a customer record 8 Menu Menu Click on the main Menu icon to enter the main men...

Страница 40: ...ondent information Press OK to confirm NOTE The value to be entered must be within the preset limits in the example on the left between 0 0 and 14 0 If the value is not between the preset limits it wi...

Страница 41: ...ick the left key to exit without performing an Ambient CO test and return to the main menu New Start a new Ambient CO test Option CO 0 click to zero out the CO sen sor offset reading To evaluate the t...

Страница 42: ...he wood moisture test ATTENTION Before starting the test check that the needles electrodes are not bent If the elec trodes are bent the distance will not be 25 mm any more so that the measurement resu...

Страница 43: ...obe Fig 39 Connectors for the wood mois ture probe at the bottom of the analyzer Plug the connectors of the Wood Moisture Probe W hler A 550 or the Wood Moisture Probe W hler HBF 420 to the female con...

Страница 44: ...be measured and confirm with Accept Entering the wood temperature Fig 42 Wood moisture test If a temperature probe or plug is connected the measured wood temperature will appear under TA Click on TA T...

Страница 45: ...nt will be displayed Average value Fig 43 Situation of the measurement points at the log In general the wood moisture should be measured at three different points see figure on the left After that the...

Страница 46: ...emely dangerous when it contains CO which is highly toxic Two independent measurements guaranty a reliable result of the measurement 1 Measurement of the condensation on the sensor board 2 Temperature...

Страница 47: ...user can observe on the graph when condensation rises Additionally an acoustic signal is emitted that will become more intensive when the condensate content is getting higher The available menu optio...

Страница 48: ...for adjusting the burner will be shown The current reading is marked with a red box and any former reading is tracked with a green line The Green Zone indicates the best combustion performance excess...

Страница 49: ...he ana lyzer Figure 1 Manifold Pressure mode screen The options in the Manifold Pressure mode screen are Option Cancel click Cancel to exit the Manifold Pressure test and return to the main menu Optio...

Страница 50: ...n in the main menu screen NOTE Make sure you connect the Ambient Air Plug see Fig 11 The options in the Manifold Pressure mode screen are Option Cancel click Cancel to exit the Temperature mode and re...

Страница 51: ...heating appliances and ventilation and air conditioning systems can cause dangerous depression With the 4 Pa Pressure Test the depression value can be controlled The readings are plotted in a graph du...

Страница 52: ...arrow only W hler A 550 Screw the adapter for the 4 Pa test on the probe handle as follows Plug the guide pin of the adapter into the guide bush marked by an arrow After that tighten the union nut Plu...

Страница 53: ...are no back draft conditions 3 Zero the pressure sensor NOTE During the zeroing proces the icon will appear at the top of the screen 4 How to position the reference capillary hose Lead the hose outsid...

Страница 54: ...about 30 seconds control depression 8 Open the window door for about 30 seconds the zero line should be reached again 9 Close the window door for about 30 seconds control depression 10 Open the window...

Страница 55: ...g the window is less or equal to 4 Pa 8 Pa in the case of wood burning depending on room air After the 4 Pa test is completed click on Measurement OK or Measurement not OK according to the test result...

Страница 56: ...orm additional purging sequences Interval 8 min The analyser will not turn off between two meas urements A purging interval can be configured Interval 8 min The analyser will turn off between two meas...

Страница 57: ...o activate the fresh air pump in a selected interval only available when interval duration is 8 min In this case the sensors will be purged with fresh air in the selected purging interval NOTE During...

Страница 58: ...5 hours we recommend to connect the USB power bank Before starting Before starting a long term logger measurement Configure the logger measurement Ensure sufficient battery power is available or conne...

Страница 59: ...isplayed Sweep the left column with a finger to navi gate through the setup menu To change a parameter click on the corre spondent key in the right column Click on OK to save the new setting before le...

Страница 60: ...name or ID Number Option Devicen Search by Change the order of the saved records between name or ID Number of the fireplace CO protection Here the user can enter a CO threshold value between 500 and 4...

Страница 61: ...to be substituted The key will turn to green In the right column signals click on the key that shall substitute the green key in the left column This key will now appear in the left column instead of...

Страница 62: ...r is allowed to trained personnel ONLY Please contact W hler for more information 9 Customer data The analyzer allows to save the values in different fireplace folders You can assign a fireplace or se...

Страница 63: ...Customer data 63 Fig 59 Creating a new customer folder Enter the name and the number of the cus tomer and the fireplace Confirm with OK...

Страница 64: ...customer and a fire place The analyzer will enter the customer menu The customer menu shows a list of all customers Fig 60 Selecting a customer in the customer menu Click on a customer The analyzer w...

Страница 65: ...er and lower case At the bottom the first result will be shown Click on the arrow key to see the other results and se lect the customer When the customer is selected search the instal lation in the sa...

Страница 66: ...he PC With the W hler A 550 Sorftware it is possible to exchange the data with the PC via USB or Blue tooth NOTE The data transfer and the functions of the Software are explained in the Manual W hler...

Страница 67: ...if necessary Control the cotton filter Replace it if polluted or wet After the wood moisture meas urement Control the distance between the needles Replace needles if necessary After every working day...

Страница 68: ...le Use tweezers or a similar tool to remove the filter from its chamber Press not rub the filter to remove humidity Replace the plexiglas filter into its old position After the working day remove the...

Страница 69: ...ion test control the cotton filter and replace it if wet or dirty 12 2 4 Water Stop Filter Behind the condensate spiral a water stop filter is located The water stop filter blocks water from entering...

Страница 70: ...this information about the average life of measuring sensors is based on specific experience O2 sensor 4 years CO sensor 4 years The sensors can be changed by the customer or by an authorized service...

Страница 71: ...e hotspot again Status OK Status Service Zeroing sensor The sensor status is continuously displayed in the right top of the screen The list below shows the possible diagnosis feedback Status icon Yell...

Страница 72: ...himself The order of the sensors is as follows from the left to the right O2 Sensor NO Sensor NO2 Sensor option SO2 Sensor only W hler A 550 COhigh Sensor only W hler A 550 CO Sensor NOTE If the user...

Страница 73: ...ke the sensor holder out of the unit first the left and then the right side Replacing the O2 Sensor Remove the 2 pin connector of the O2 sensor Replace the O2 sensor by a new one Plug the new 2 pin co...

Страница 74: ...of the gas channel into the sensor holder Fig 73 Corrugated tube correctly posi tioned guiding hooks marked by an arrow ATTENTION Make sure that the flexible connectors are not bent Make sure that the...

Страница 75: ...yzer as described before in the chapter sensor re placement Fig 74 Before exchanging the battery remove the purge pump Carefully remove the purge pump out of the analyzer so that the battery plug is n...

Страница 76: ...owing tests have to be performed With test gas O2 measurement CO measurement NO measurement option The flue gas temperature TS has to be checked with a reference standard at two measuring points one p...

Страница 77: ...in customer service Therefore of course we are readily available to assist you after the warranty period ends Send us the device and we will repair it and return it to you with our package ser vice I...

Страница 78: ...der no 4651 Aluminium Framed Case Order no 5515 Printer W hler TD 100 Thermal Printer Order no 4160 Paper for W hler TD 100 Thermal Printer Order no 4145 Spare parts and consumables Water Stop Filters...

Страница 79: ...9 1589223 0 Fax 49 89 1589223 99 sued woehler de International USA Wohler USA Inc 5 Hudchinson Drive Danvers MA 01923 Tel 1 978 750 9876 Fax 1 978 750 9799 www wohlerusa com Italy W hler Italia srl Co...

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