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Getting Started

Your THDx recorder has been preset to operate using 
the post popular settings.

  Recording Time: 

7 day

  °F/C: 

°F

  Temperature Range:  -20 to +120°F
  Variables Recorded:  °F and %RH

Pens and a chart have already been installed for your 
convenience. All you need to do to start using your 
THDx recorder with the settings listed above is fol-
low these quick start instructions:

1.  Plug in the AC adapter
2.  Set the appropriate time by inserting a coin    

Chart Installation

1.  Press the “Pen Home” key to make pens move to  
     the outside of the chart.
2.  Press the pen lifting bar to raise the pens.    
     Remove the recorded chart if present.
3.  Place the new appropriate chart on the chart hub, 
     being certain that the edge of the chart slides  
     under the chart guide clips located at the outside  
     of the chart. NOTE: The chart should lay flat on  
     the dial face.

  into the groove in the chart hub and turning 
  clockwise until the correct hour and day on    
  the chart is referenced to the timing clip (see  
  “Instrument Anatomy” if you need assistance  
  locating instrument parts).
3.  Remove the protective pen caps
4.  Press the “On/Off” key and the pens will move to  
  the current reading.

After you get started using the “Quick Start 
Instructions,” we recommend that you also read the 
rest of the manual to ensure that you get the most 
our of your instrument.
 
Requires 4 “D” size batteries for battery back-up.

4. Set time by inserting a coin into the groove in the
     chart hub and turning clockwise until the correct  
     hour (and day if applicable) on the chart is 
     referenced to the timing clip.
5. Lower the pen lifting bar so that the pen tips rest  
     firmly on the paper.
6. Press the pen home key to return the pens to  
     position. At the end of tone recording time cycle,  
     simply repeat steps 1-5, replacing the used chart  
     with a new one.

Pen Installation

1.  Press the “Pen Home” key to return pen to the home position.
2.  Use the “Pen Arm” lifter to raise the pens.
3.  Simply slide used pen cartridge off and slide new one on. Lower pen arm lifter.
4. Press the “Pen Home” key to return pen to chart position.

Summary of Contents for THDx

Page 1: ... Operation Dip Switch Setup Warranty Troubleshooting Factory Service Returns Order Form Product Specifications Features Operating Information Display Symbols Charts Accessories Calibration Instrument Anatomy Getting Started Installation Keypad Operation Dip Switch Setup Warranty Troubleshooting Factory Service Returns DICKSON DICKSON 930 South Westwood Avenue Addison Illinois 60101 Phone 630 543 3...

Page 2: ...se Time 2 5 min for 63 of full scale NOTE Response time is slower when using battery Calibration User calibration of all variables Product Features Remote sensing capability with optional extension cords 10 50 and 100 available see Accessories Alarms Audio Visual with High Low setting capabilities Microprocessor control and electronic sensing C F and RH Dew Point switchable Large 8 diameter circul...

Page 3: ...he unit upside down or on its side so that you can see where the probe connects to the back of THDx 2 Twist and pull the black rubber strain relief beginning on the back of the recorder body see Instrument Anatomy 3 Slide the strain relief on the cord 4 Inside you will see a standard connector which looks like a phone jack Using a small screw driver press retention tab and the connector will pop o...

Page 4: ...tch 5 to select humidity or dew point RH 5 off Dew Point 5 on Use dip switch 3 to select F or C F 3 off C 3 on 2 To activate the calibration mode turn the unit off Now press the On Off key and the up arrow key at the same time The UC symbol will appear in the display to indicate you are in User Calibration mode 3 Place the probe of the unit along with your precision relative humidity dew point ins...

Page 5: ...tomy Getting Started Installation Keypad Operation Dip Switch Setup Warranty Troubleshooting Factory Service Returns DICKSON Instrument Anatomy Figure 1 Figure 2 Alarm Sound Source AC Adapter Jack Strain Relief Probe Pen Lifting Bar Chart Hub Timing Clip Temperature Pen Humidity Dew Point Pen Pen Cap Holders Chart Guide Clip ...

Page 6: ... chart should lay flat on the dial face into the groove in the chart hub and turning clockwise until the correct hour and day on the chart is referenced to the timing clip see Instrument Anatomy if you need assistance locating instrument parts 3 Remove the protective pen caps 4 Press the On Off key and the pens will move to the current reading After you get started using the Quick Start Instructio...

Page 7: ... settings are Temperature 40 F min to 110 F max Humidity 20 min 80 max NOTE Alarm settings will return to the default when AC power fails and there are no batteries installed for back up power Alarm ON OFF This button turns the alarms on and off When alarms are ON the alarm symbol appears on the display When alarm sounds it will sound audibly for approximately 1 minute and then it will stop For a ...

Page 8: ...s four different recording time options 1 day 7 day 14 day and 31 day Dip Switch 1 and 2 control the recording time 7 day 1 off 2 off 1 day 1 off 2 on 14 day 1 on 2 off 31 day 1 on 2 on NOTE Remember to install correct chart to match corresponding switch setting F C You can record in F or C with the THDx by using dip switch 3 F 3 off C 3 on Temperature Range The THDx will record in two temperature...

Page 9: ...Check both dip switch 7 8 Both should be off to allow operation Pen trace too fine or absent Pen may need to be replaced moistened or sanded Remove pen cap Display shows Err Temperature being monitored is too high see pg 2 Display shows Prob Temperature being monitored is extremely cold or probe is disconnected Display shows cold Temperature being monitored is too low see pg 2 Display shows frozen...

Page 10: ...ice Unit Total each each each each Subtotal In Illinois add 7 5 sales tax 4 Tax Freight All Prices in U S Dollars 4 Total Step 4 Payment Method Check Check Money Order Credit Card Credit Card Number Expires mm yy Signature Purchase Order P O Net 15 days for established customers Customer U S A Freight Charges Fax to 1 800 676 0498 Mail to Dickson 930 S Westwood Ave Addison IL 60101 Total Order UPS...

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