OAKTON hygrothermograph manual
Contents
1. the groove See figure O 8 Install the new chart paper on the Chart Roll e Load the new chart paper onto the Chart Roll making sure that the slot on the chart paper roll fits into the ridge on the lower disk e Make sure that the chart paper is loaded correctly The side of the paper with the oval shaped sprocket holes should be at the upper disk top while the side with the round sprocket holes should be at the lower disk bottom e Replace the upper plastic disk of the Chart Roll by turning it clockwise See figure Q Take up roll upper disk J stopper slot cardboard tube 15 9 Install the Chart Roll with the new chart paper back into the chart assembly e Place the pointed spindle tip pro truding through the upper disk into the receptacle at the left on the upper part of the assembly Push to the left and reinsert the right end of the starting roll into the groove on the lower part of the assembly Make sure that the roll is securely installed and can pivot easily See figure e Make sure paper is positioned so it will run in a counterclockwise direction around the Chart Roll See figure 1 10 Pull out the chart paper about 6 inches Draw the paper around the Timing Roll Make sure the sprock et holes in the paper are placed correctly over the sprockets on the Timing Roll See figure 0 11 Tape the end of the chart paper to the Take Up Roll Remove any oth2. 08368 20 2 or 3 speed 14 to 122 F 7 day 2 hour 100 WD 08368 30 2 or3 speed 10 to 50 C 1 day 15 minute 100 WD 08368 40 2 or3 speed 10 to 50 C 7 day 2 hour 100 WD 08368 22 3 speed 14 to 122 F 32 day 6 hour 25 WD 08368 42 3 speed 10 to 50 C 32 day 6 hour 25 WD 37250 60 Long cycle 20 to 50 C 1 month 2 hour 1 roll WD 37250 62 Long cycle 20 to 50 C 3 month 2 hour 1 roll Extra Pens For use with all OAKTON hygrothermographs WD 08368 75 Blue pens 6 pack WD 08368 70 Red pens 6 pack Axial Fan WD 37250 50 Optional axial fan Use with 2 speed 3 speed and long cycle models for more uniform sample measurements in fluctuating environments 110 VAC WD 01578 02 Transformer Use to operate axial fan at 220 VAC 100 W 26 9 Appendix 1 Readings in areas with high humidity The specially processed human hair bundle such as the one used in this instrument is the best sensor for ambient humidity measurements in terms of linearity repeatability and temperature compensation Human hair will elongate linearly as humidity increases or decreases in the range of 5 to 90 RH However one of the characteristics of human hair is that exposure to humidity levels above 90 RH causes it to undergo a change of state This condition is called the saturated state and occurs with even short exposure to high humidity levels When the hair bundle reaches the saturated state it contracts and causes a 7 to 9 downward shift in
3. L Pen tip for temperature 6 Protective cover drum is completely lowered over the 2 Cylinder drum with quartz clock 7 Pen arms center shaft 3 Pen tip for humidity 8 Pen guide See figure Q 4 Paper holder 3 Replace the hold down nut on the top of the center shaft 5 Pen lift lever 4 Hygrothermograph operation ES Powering your hygrothermograph Minidrum models 08369 50 and 70 These models require one AA battery The battery compartment is located on top of the cylinder drum To open the battery compartment slide the cover of the battery compartment to the side Make sure that the end of the battery is facing up Spring wound 2 speed model 37250 10 This model is spring wound requires no batteries The spring winding shaft is located on top of the cylinder drum To wind up the unit turn the shaft counterclockwise until it is too stiff to move any further This hygrothermograph will make a clicking sound while running The drum will maintain an even rotation speed even when the spring is winding down 3 speed model 37250 00 This model requires two C batteries The battery compartment is located on top of the cylinder drum To open the battery compartment pull the silver knob on top of the battery compartment away from the center of the cylinder drum Note polarity on the lid of the battery compartment This model features a battery indicator To check the battery press the
4. best results we recommend you use our chart paper See the Accessories section on page 26 to order extra chart paper rolls When the chart paper is nearing the end of its cycle a red stripe will appear on the lower edge of the chart paper The stripe means there are only three days left and that the paper should be changed by that time Timing roll knob To change the chart paper 1 Remove the protective cover Pull the pen lift lever towards you so the pen tips do not touch the paper Write the time and date on the chart paper 2 Wind the old chart paper onto the Take Up Roll by turning the Timing Roll knob clockwise in the direction of the arrow See figure Q 3 Release the right and left chart assembly locks located on the base of the instrument near the chart drive mechanism See figure O 4 Pull the chart assembly back using the handle located behind the chart assembly To prevent the unit from tipping over hold the base of the instrument with your other hand Use the handle to keep the chart assembly in a horizontal position See figure O 5 Remove the empty cardboard tube from the Chart Roll see sticker on top of chart assembly for position See figure D e Push the Chart Roll towards the top of the chart assembly which removes it from the groove at the base of the assembly e Pull the Chart Roll out from the bottom e Remove the upper plastic disk of the Chart Roll by tu
5. it from the post See figure B 3 Using two screwdrivers lift the gear currently installed on the bottom of the cylinder drum See figure c 4 Insert the other gear onto the oppo site shaft on the bottom of the drum e The one day gear slides on the shaft marked 24 H Z 22 This gear has 22 teeth and a larger diameter than the 7 day gear e The seven day gear slides onto the shaft marked 168H Z 18 This gear has 18 teeth 5 Place the gear not in use over the post at the corner of the thermohy grometer s base for storage 6 Install the cylinder drum onto the cylinder shaft See page 7 for directions 20 Three speed hygrothermograph 37250 00 This model lets you select between a 1 7 and 32 day drum rotation When you receive your hygrothermograph from the factory it is set for a 7 day rotation o0 See figure _ IMPORTANT make sure you have the appropriate chart paper for the rotation speed you select See page 26 to order more chart paper 1 To switch from 7 day operation to 1 day operation flip the switch on top of the cylinder drum to 1D See figure Q 2 To switch from 7 day operation to 32 day operation flip the switch on top of the cylinder drum to 32D See figure Q 21 5 Installing optional axial fan NOTE The axial fan is not for use with minidrum models 08369 50 and 08369 70 The external draft fan optional att
6. red check button next to the battery compartment Note the color of the LED indicator e A green LED means the batteries are in good condition e A red LED means the batteries need to be replaced Top of Drum Close up of battery indicator I BATTERY Long cycle model 37250 20 This model requires one C battery The battery compartment is located on top of the cylinder drum To open the battery compartment flip open the lid on top of the cylinder drum Note polarity inside the battery compartment This model features a battery indicator To check the battery press the red check button next to the battery compartment The power indicator has green white and red zones e the green zone means the battery is in good condition e The white zone means the battery is low and will have to be replaced soon e The red zone means the battery is very low and should be replaced immediately Close up of battery indicator AN BATTERY E Cartridge pens To operate the pens 1 Pull the pen lift lever towards you to move the temperature and humidity pens to their resting position See figure Q 2 Remove the pen caps by rotating them counter clockwise 3 Push the pen lift lever away from you until the temperature and humidity pens are touching the paper on the cylinder drum NOTE Do not touch the pen tips because skin oils will prevent the ink from flowing sm
7. the humidity indications If the humidity then stays below 80 the hair bundle will elongate linearly for approximately two weeks After this time period the hair bundle is in its dry state The hair bundle has two curves depending on the state of the hair bundle These characteristics can be taken into account when using the instrument The instrument is calibrated at the factory with the hair bundle in the dry state Generally the instrument is used indoors with humidity levels below 90 When used in air conditioned areas or other areas of moderate humidity you do not need to adjust the instrument How to use the instrument in high humidity areas For use above 85 RH turn the humidity fine adjustment screw counterclockwise to raise the humidity reading by 7 to 9 Readings will be within specifications over the entire range when the instrument is exposed to high humidity conditions 85 to 100 at least once every two weeks Note any calibration change either on the chart paper or on the instrument itself This way you can change the instrument back to its original calibration if required 27
8. 10 Warranty OAKTON warrants this instrument to be free from significant deviations in material and workmanship for a period of one year from date of purchase If repair or adjustment is necessary and has not been the result of abuse or misuse within the warrantied time period please return freight prepaid and correction will be made without charge OAKTON alone will determine if the product problem is due to deviations or customer misuse Out of warranty products will be repaired on a charge basis 11 Return of items Authorization must be obtained from our Customer Service Department before returning items for any reason When applying for authorization please include data regarding the reason the items are to be returned For your protection items must be carefully packed to prevent damage in shipment and insured against possi ble damage or loss We will not be responsible for damage resulting from careless or insufficient packing A restocking charge will be made on all unauthorized returns NOTE We reserve the right to make improvements in design construction and appearance of products without notice 00703 07 OAKION OPERATING INSTRUCTIONS OAKTON Models 08369 50 70 37250 00 10 20 grothermographs Printed in the U S A 1 00 Write down the name and information of your OAKTON distributor here Table of Co
9. F 41 C 1 8 F bimetallic strip 1 C 2 F GE al WLL 1 day 26 hr or 7 day 172 hr Spring wound 13 3 W x 11 5 H x 5 1 D 9 Ibs Three speed hygrothermograph 37250 00 5 to 90 RH 3 from 10 to 90 RH 5 from 5 to 10 RH 0 to 100 RH human hair bundle 1 RH 10 to 50 C 14 to 122 F 41 C 41 8 F bimetallic strip T C 2 F Gye ial xe US IL 1 day 26 hr 7 day 172 hr or 32 day 810 hr Two C batteries included 13 3 W x 11 5 H x 5 1 D 9 Ibs Long cycle hygrothermograph 37250 20 5 to 90 RH 3 from 10 to 90 RH 5 from 5 to 10 RH 0 to 100 RH human hair bundle 1 RH 20 to 50 C 1 C bimetallic strip 1 C 6 6 H x 114 L 1 month 6 6 H x 300 L 3 month 1 month 38 day max or 3 month 100 day max One C battery included 13 3 W x 11 5 H x 5 1 D 9 Ibs 25 8 Ordering information Additional Hygrothermographs WD 08369 70 Minidrum hygrothermograph WD 08369 70 Domed minidrum hygrothermograph WD 37250 10 Spring wound two speed hygrothermograph WD 37250 00 Three speed hygrothermograph WD 37250 20 Long cycle hygrothermograph Extra Chart Paper Model Use with Temperature Rotation Increments Quantity number model type range pack WD 08369 60 Mini drum 22 to 104 F 7 day 2 hour 100 WD 08369 55 Mini drum 6 to 40 C 7 day 2 hour 100 WD 08368 10 2 or 3 speed 14 to 122 F 1 day 15 minute 100 WD
10. aches to the protective cover It improves instru ment response and accuracy by directly pulling surrounding air into the instrument Use the fan in areas where ventilation is poor If you want to order an axial fan see the Accessories section on page 26 To attach the fan 1 Install the fan on the single column of five vents located on the protective cover See figure Q 2 Position fan so that the spring clips on the fan go into the upper vent slots on the hygrothermograph cover See figure 3 Let the fan slide down until it stops Make sure both spring clips are fully engaged in the cover See figure O 4 Position the instrument so the flow of air from the fan will not be blocked 5 Plug the power cord into an 110 to 120 volt 50 60 Hz outlet For 220 V operation order optional 220 V transformer sold separately in Accessories section on page 26 22 1 Do not use your hygrothermograph 4 e in direct sunlight e in temperatures below 20 C or above 50 C e near ovens stoves or other heating equipment e near harsh chemicals such as paint thinner or ammonia e in dusty or wet environments e within magnetic fields e in areas with strong vibrations such as loudspeakers or motors For best results use only the pens and chart paper listed under the Accessories section of this manual page 26 We cannot guarantee results with other pens and other paper D
11. en the time printed on the chart paper and pen tips line up about two hours past the present time 4 Turn the cylinder counterclockwise to the correct present time 5 To take up slack in the chart paper turn the chart paper roll counterclock wise until the paper is taut Be sure not to offset the alignment of present time and pen tips See figure E EZ Chart paper NOTE See pages 13 17 for directions on changing the chart paper on long cycle model 37250 20 Your cylinder drum comes with one sheet of chart paper already attached See the Accessories section on page 26 to order extra chart paper To replace chart paper for models 08369 50 08369 50 37250 10 37250 00 1 Wind the new chart onto the cylinder so that the two ends of the paper overlap See figure Q 2 Secure this overlapping section with the paper holder See figure O 3 Make sure the markings on the paper coincide where the overlap occurs 4 Follow directions on bottom of page 11 to set the correct time 12 To replace chart paper for long cycle model 37250 20 The long cycle hygrothermograph comes with one roll of paper installed As the unit records paper moves from the Chart Roll to the Take Up Roll When the paper is completely used you need to replace the chart paper NOTE do not discard cardboard tube from the original chart paper roll You will need this cardboard tube for use on the Take Up Roll For
12. er paper that might still be attached to the Take Up Roll Be sure the paper is straight and even so that it tracks properly See figure Q 16 Tipe i J 5 Tl DEEDS g R ry A l iy 12 Advance the chart with the timing knob 13 Return the chart assembly upright to its original position See figure 14 Tighten the right and left assembly locks to hold chart assembly in place See figure Q 15 To set time see bottom of page 11 16 Make sure to check that pen car tridges and batteries are still fresh Notes Be sure to check at least once a month to guarantee accuracy since the instru ment operates over a long period of time 30 or 90 days Also make sure to periodically check that the pens are operating correctly Vibrations could loosen the chart paper in about 60 days The paper should be tightened for accurate time readings XJ Calibration adjustment Your hygrothermograph is factory calibrated However vibration during shipment may make a slight readjustment necessary To adjust calibration 1 Compare the hygrothermograph reading to another temperature humidity instrument known to be accurate 2 Raise and lower the reading by turning the adjustment screws See drawings on these two pages for location of the adjustment screws Calibration adjustment screw locations Minidrum hygrothermograph model 08369 70 On the min
13. eturn Of IteMS sssssssssnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nnmnnn nnmnnn nnmnnn nnana 28 3 1 Introduction Thank you for selecting an OAKTON thermohygrometer These precision instru ments are useful for monitoring temperature and relative humidity conditions over time They create a permanent chart recording of these measurements for your records Their quartz controlled drive maintains an even drum speed even when batteries are weak or when the spring winding runs down Typical applications include general weather measurements agriculture horticulture monitoring the condition of test laboratories humidity chambers computer rooms precision machinery rooms food storage facilities warehouses museums bank vaults film and book storage facilities You have one of five available models Minidrum hygrothermograph Model number 08369 70 Special features e Compact size e Records on 7 day rotation e Protective acrylic cover locks into place Domed minidrum hygrothermograph Model number 08369 50 Special features e Our most compact model e Records on 7 day rotation e Protective glass dome Spring wound two speed hygrothermograph Model number 37250 10 Special features e Spring wound no batteries needed e Records on 1 or 7 day
14. idrum hygrothermograph model the calibration screws are locat ed behind the two stickers on the back of the beige case protecting the pen mechanism See figure Q Remove the stickers to reach the cali bration adjustment screws See figure O 18 Domed minidrum hygrothermograph model 08369 50 All other models models 37250 00 10 20 Temperature calibration adjustment screw Humidity calibration adjustment screw Temperature calibration adjustment Humidity calibration adjustment screw 19 EJ Changing drum rotation length NOTE Minidrum models 08369 50 and 08369 70 operate on a 7 day rotation only Long cycle model 37250 20 accepts either 1 month or 3 month chart rolls it is not necessary to adjust drum speed Spring wound two speed hygrothermograph 37250 10 This model lets you select between a 1 and 7 day drum rotation When you receive your hygrothermograph from the factory it is set for a 7 day rotation IMPORTANT make sure you have the appropriate chart paper for the rotation speed you select See page 26 to order more chart paper 1 Look at the bottom of the cylinder drum You will see notches for two gears Only one gear will be in place See figure Q 2 The alternate gear is located on a post at the corner of the thermohygrome ter s base Remove
15. ntents 1 Introd ctionN Bee es eee 4 5 2 COMPONENKS ccceeeeeeeeeeeeeeeeeeeeeeneeseeeeeeseeeeaeeenaeeeseaneeeeeeeeseeeeeseeeeeceneeeeeee 6 3 Getting Started ccccceecceeeeeeeeneeeeeeeeeeeeaeeeeeeeeeneoeseeeeeeeeenaeeeeeeeeseaseeeeeeesenans 7 Si Tp a Cin Gs cis veel sana stewed evades ess esau esta KERE Ueatted ence ae taeertalcensoiacdeavdervarksuctuasdayeaiaieies 7 3 2 Attaching the cylinder drum 4 Hygrothermograph operation 4 1 Powering your hygrothermograp himasin EEEE 8 9 4 2 Cartridge Pens sisssrsssssissssesrsierssrsesssiisneiosetessstdstsoE rE nE E bESE STEES ESEESE EESTE BARM SASEN ESAE SETENE 10 43 Setting Heera np iiare eiiiai EEEE ENEAS AS RELAT ENRE ARE ie 1 A A CARE papelpin eaea ia neler a VaR EARE 12 17 4 5 Calibration adjustment scis lt sczsiiessecasatantecssence hoc cadsas gesdsdeack St reias i ea hierati ieie 18 19 4 6 Changing drum rotation length xc cciinnc ated aati aren S 20 21 5 Installing optional axial fan ccececeseeseeeeeeeeeeaneeeeeeeeeeeeeeeeeeeeeeneneeeeee 22 6 Precautions 0 c eee 23 7 SPCCHFICATIONS ceeceeeeeeeeeeeeeeeeeeeeneneeeeeeeeneeeseeeeeeeeenaseeeeeaeseoanaeeeeeesnons 24 25 8 Ordering information cccccesseeeeeeeeeeeeeeeeeeeeeeeeseeeeeeaeenaeeeeeeaesneeeeeeeenans 26 9 Appendix 1 Readings in areas with high humidity csssseseeee 27 10 Warranty ccccccseeeeeeeeeeenseeeeneeseeseeeeeeneueeseanegeeeneageeneagessaeeaeeeneenseneneennnas 28 11 R
16. o not repair the instrument yourself Should repairs be necessary please return the instrument to place of purchase See the back cover of this manual for infor mation on instrument Warranty and Return of Items If your instrument will not be used for long periods of time make sure to replace the pen caps and remove the battery 23 7 Specifications Model Model number Humidity range Humidity accuracy Humidity chart range Humidity sensor Humidity chart graduations Temperature range Temperature accuracy Temperature sensor Temp chart graduations Chart size Chart rotation Power Dimensions Shipping weight 24 Minidrum hygrothermograph 08369 70 5 to 90 RH 5 from 10 to 90 RH 7 from 5 to 10 RH 5 to 100 RH human hair bundle 5 RH 6 to 40 C 22 to 104 F 42 C 43 6 F bimetallic strip 2 C 2 F SHO lal ey INL 7 day 172 hr One AA battery included 6 W x 7 4 H x 3 9 D 4 lbs Domed minidrum hygrothermograph W08369 50 5 to 90 RH 5 from 10 to 90 RH 7 from 5 to 10 RH 5 to 100 RH human hair bundle 5 RH 6 to 40 C 22 to 104 F 42 C 43 6 F bimetallic strip 2 C 2 F 3 6 H x 8 1 L 7 day 172 hr One AA battery included 7 5 H x 5 dia 4 lbs Spring wound two speed hygrothermograph 37250 10 5 to 90 RH 3 from 10 to 90 RH 5 from 5 to 10 RH 0 to 100 RH human hair bundle 1 RH 10 to 50 C 14 to 122
17. oothly To replace the pens The pen tips can be used for up to a year but we recommend that you replace them at least every six months Conditions such as high temperature or low humidity may shorten pen life to three months See the Accessories section on page 26 to order extra pens 1 Hold the pen arm in your right hand and pull the pen cartridge off with your left hand If it is difficult to pull off use a small pliers See figure O 2 To attach the replacement cartridge pen insert it over the arm until it is fully attached 10 EE Setting the time Models 08369 50 08369 50 37250 10 37250 00 1 Pull the pen lift lever towards you to move the temperature and humidity pens to their resting position See figure Q 2 Turn the cylinder drum one full rotation clockwise See figure 3 Turn the cylinder drum counterclock wise until the pen tips align with the correct time of day or night Numbers indicating time are located at the top and bottom of the chart paper NOTE Make sure that the numbers on the graph are right side up Change the chart paper when the cylinder has com pleted one rotation Long cycle model 37250 20 only 1 Pull the pen lift lever slightly towards you to move the temperature and humidity pens away from the chart See figure QO 2 Turn the chart assembly knob located on top of the chart assembly clockwise See figure 3 Stop wh
18. rning it counter clockwise e Remove the cardboard tube from the metal spindle spindle is inside the cardboard tube Save this cardboard tube for step 7 See figure E 6 Remove the Take Up Roll with the old chart paper from the chart assembly see sticker on top of chart assembly for position See figure Q e Push the Take Up Roll toward the top of the chart assembly which removes it from the groove at the base of the assembly e Pull the Take Up Roll out from the bottom e Remove the upper plastic disk of the Take Up Roll by turning it counter clockwise e Remove the used chart paper complete with inner cardboard tube from the metal spindle spindle is inside the cardboard tube See figure E 14 upper disk cardboard tube Take up roll 7 Replace the Take Up Roll with the empty cardboard tube into the chart assembly e Place the empty cardboard tube from step 5 back over the metal spindle of the Take Up Roll Make sure that the slot on the Take Up Roll fits into the ridge on the lower disk e Replace the upper plastic disk of the Take Up Roll by turning it clockwise See figure Q e Place the pointed spindle tip protruding through the upper disk into the receptacle at the left on the upper part of the assembly Push to the left and reinsert the right end of the take up cylinder into the bottom groove You may have to turn the cylinder slightly until it slides into
19. rotation e Protective acrylic cover locks into place Three speed hygrothermograph Model number 37250 00 Special features e Records on 1 or 7 or 32 day rotation e Protective acrylic cover locks into place Long cycle hygrothermograph Model number 37250 20 Special features e Records on 1 or 3 month rotation e Protective acrylic cover locks into place 2 Components 3 Getting started All OAKTON hygrothermographs have these same features EES Unpacking 1 Remove all components from the packing material 2 Carefully remove the acrylic or glass protective cover from the hygrothermo graph If your model has a handle turn the carrying handle to the left until it stops then lift up the protective cover 3 Carefully remove the styrofoam piece located beneath the pen arm mechanism A Remove the white paper that secures the humidity pen 5 Lift the metal pen holding fitting up from the temperature pen until it is removed from the pen guide 6 Move the pen lift lever towards you to pull the temperature and humidity pens to their resting position NOTE Keep all original packing in case you need to transport the instrument EQ Attaching the cylinder drum NOTE Long cycle model 37250 20 already has an attached cylinder drum 1 Unscrew the hold down nut from the center shaft 2 Carefully insert the cylinder drum onto the center shaft Make sure the cylinder
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