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General tools EP8711P User Manual

6-in-1 in-duct digital psychrometer with enthalpy
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6-IN-1
IN-DUCT DIGITAL
PSYCHROMETER
WITH ENTHALPY
USER'S MANUAL
EP8711P
Please read this manual carefully and
thoroughly before using this product.

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Summary of Contents for General tools EP8711P

  • Page 1 6-IN-1 IN-DUCT DIGITAL PSYCHROMETER WITH ENTHALPY USER’S MANUAL EP8711P Please read this manual carefully and thoroughly before using this product.

  • Page 2: Table Of Contents

    Warranty Information ... 13 – 14 Return for Repair Policy ... . . 14 INTRODUCTION Thank you for purchasing General Tools & Instruments’ EP8711P 6-in-1 In-duct Digital Psychrometer with Enthalpy. Please read this user’s manual carefully and...
  • Page 3 • Professionals charged with monitoring and maintaining the environment of facilities such as office buildings, greenhouses, food and equipment storage facilities, wineries, freezers, shipping containers, computer rooms, labs, libraries, museums and saunas. The dew point is the temperature below which the water vapor in a volume of air at a given constant barometric pressure will condense into liquid water at the same rate at which it evaporates.

  • Page 4: Key Features

    The most common application for the EP8711P's enthalpy-calculating algorithm is measuring the enthalpy of vaporization of air in an HVAC/R system duct. The EP8711P is powered by (3) “AAA” batteries (included). KEY FEATURES • Integral 6 in. long sensor-tipped probe for measuring conditions inside ductwork.

  • Page 5: What's In The Package

    PRODUCT OVERVIEW Figure 1 shows all of the controls, indicators and physical structures on the front and back of the EP8711P. Figure 2 shows all text and icons that could appear on the unit’s LCD. Familiarize yourself with the positions...
  • Page 6 Fig. 1. The EP8711P’s controls, indicators and physical structures A. Humidity and temperature sensors under protective cap B. LCD C. MODE button D. UNIT button E. Pocket clip F. Battery compartment G. Rubber bushing for inserting probe in ductwork...
  • Page 7 Fig. 2. All possible display indications and their meanings RH = Relative humidity mode indicator TEMP = Temperature mode indicator DEW = Dew point mode indicator WET = Wet bulb mode indicator MIX = Mixing ratio mode indicator ENTH = Enthalpy mode indicator GPP = Mixing ratio Imperial unit g/kg = Mixing ratio metric unit kJ/kg = Enthalpy metric unit...

  • Page 8: Setup Instructions

    1. The meter’s battery compartment (Fig. 1, Callout F) is accessible from the bottom of the unit. Slide the battery compartment cover down and away from the EP8711P and set it aside. 2. Insert the three supplied “AAA” batteries in the compartment, orienting them as...
  • Page 9 MIX on the bottom line of the LCD. How pressing the MODE button changes the measured parameter For all parameters except RH, the EP8711P will automatically display readings in Imperial units. To switch to metric units for ambient, dew point or wet bulb...
  • Page 10 EP8711P, the unit’s Auto Power Off (APO) function will automatically shut down the instrument if no front-panel buttons are pressed within any 2-minute period. To power off the EP8711P, press and hold the MODE button for at least 3 seconds.

  • Page 11: Specifications

    SPECIFICATIONS Ambient Temperature Measurement Range: -4° to 158°F (-20° to 70°C) Ambient Temperature Measurement Accuracy: ±0.9°F (0.5°C) from 14° to 104°F (-10° to 40°C); ±1.8°F (1°C) elsewhere in range Temperature Measurement Resolution: 0.1° RH Measurement Range: 0 to 100% RH Measurement Accuracy: ±3% from 20 to 80%RH;...

  • Page 12: Operating & Maintenance Tips

    Remove the batteries when storing the unit or when you do not expect to use it for an extended period of time (months rather than weeks). Do not drop or disassemble the EP8711P or immerse it in water.

  • Page 13: Warranty Information

    The defective unit must be returned to General Tools & Instruments or to a General-authorized service center, freight prepaid and insured. Acceptance of the exclusive repair and...

  • Page 14: Return For Repair Policy

    Goods Authorization) number before forwarding the unit via prepaid freight to the attention of our Service Center at this address: General Tools & Instruments 75 Seaview Drive • Secaucus, NJ 07094 212-431-6100 Remember to include a copy of your proof of purchase, your return address, and your phone number and/or e-mail address.
  • Page 15 NOTES ________________________________ ________________________________ ________________________________ ________________________________ ________________________________ ________________________________ ________________________________ ________________________________ ________________________________ ________________________________ ________________________________ ________________________________ ________________________________ ________________________________ ________________________________ ________________________________ ________________________________ ________________________________...
  • Page 16 75 Seaview Drive Secaucus, NJ 07094-1806 PHONE (212) 431-6100 FAX (212) 431-6499 TOLL FREE (800) 697-8665 e-mail: sales@generaltools.com www.generaltools.com EP8711P User’s Manual Specifications subject to change without notice ©2015 GENERAL TOOLS & INSTRUMENTS NOTICE - WE ARE NOT RESPONSIBLE FOR TYPOGRAPHICAL ERRORS. MAN# EP8711P 05/11/15...

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