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DICKSON
THDx
Temperature, Humidity & Dew Point Chart Recorder
Contents:
Product Specifications & Features
Operating Instructions & Display Symbols
Charts & Accessories, Calibration
Instrument Anatomy
Getting Started / Installation
Keypad Operation
Dip Switch Setup & Warranty
Troubleshooting, Factory Service & Returns
Order Form
DICKSON
930 South Westwood Avenue
Addison, Illinois 60101
Rev. 06/03
Phone: (630) 543-3747 • E-mail: DicksonCSR@dicksonweb.com
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Summary of Contents for Dickson Industrial THDx
- Page 1 DICKSON THDx Temperature, Humidity & Dew Point Chart Recorder Contents: Product Specifications & Features Operating Instructions & Display Symbols Charts & Accessories, Calibration Instrument Anatomy Getting Started / Installation Keypad Operation Dip Switch Setup & Warranty Troubleshooting, Factory Service & Returns...
- Page 2 Product Specifications Temperature Ranges: User Selectable: -20 to +120˚F (-20 to +50˚C), +40 to +110˚F (+5 to +40˚C) Temperature Accuracy: ±1.8˚F (±1.0˚C) Temperature Sensor: Thermistor Humidity Range: 0 to 95% (non-condensing) Humidity Accuracy: ±2% from 0 and 60%, ±3% from 60 to 95% Humidity Sensor: Monolithic IC humidity sensor Dew Point Range:...
- Page 3 Probe slowly to extend battery life. The 120V AC adapter The THDx probe sits in the cradle in the back of the plugs into the back of the recorder beneath the unit. The THDx probe comes with the standard 8”...
- Page 4 1. Turn the unit on and use dip switch #5 to select display. humidity or dew point (RH=#5 off, Dew 2. Place the THDx probe, along with your precision Point=#5 on). Use dip switch #3 to select °F or temperature instrument (your temperature °C (°F=#3 off, °C=#3 on).
- Page 5 Instrument Anatomy Figure 1 Probe Strain Relief Alarm Sound Source AC Adapter Jack Figure 2 Pen Cap Chart Holders Guide Clip Pen Lifting Bar Chart Hub Humidity/ Temperature Timing Clip Dew Point Pen Rev. 06/03...
- Page 6 Getting Started Your THDx recorder has been preset to operate using into the groove in the chart hub and turning the post popular settings. clockwise until the correct hour and day on the chart is referenced to the timing clip (see...
- Page 7 Keypad Operation The defaults for alarm settings are: ON/OFF Temperature: +40°F min to +110°F max Humidity: 20% min, 80% max NOTE: Alarm settings will return to the default when MIN/MAX AC power fails and there are no batteries installed for back-up power. Alarm ON/OFF DISPLAY ALARM...
- Page 8 °F/C calibration. (For more information on use of the You can record in °F or °C with the THDx by using keypad see “Keypad Operations” on pg. 5.) dip switch #3.
- Page 9 Troubleshooting Problem Solution Temperature Pen & Display do not match • Check dip switch setting & proper chart • May also be hysteresis, see page 4, “Pens” • Need for pen adjustment, see page 4, “Pen Adjust” Instrument is not responding to key presses •...
- Page 10 Fax to: 1-800-676-0498 Mail to: Dickson, 930 S. Westwood Ave, Addison, IL 60101 Step 1 - Bill To: Name Company Address City State Phone ( – Email Step 2 - Ship To (if different than above) Name Company Address City State Phone ( –...
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