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Summary of Contents for General EP8709
- Page 1 CALIBRATABLE 4-FUNCTION THERMO- HYGROMETER USER’S MANUAL EP8709 Please read this manual carefully and thoroughly before using this product. 99 Washington Street Melrose, MA 02176 Phone 781-665-1400 Toll Free 1-800-517-8431 Visit us at www.TestEquipmentDepot.com...
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Page 2: Table Of Contents
Warranty Information ... . 15 Return for Repair Policy ..16 INTRODUCTION Thank you for purchasing General Tools & Instruments’ EP8709 Calibratable 4-Function Thermo-Hygrometer. Please read this user’s manual carefully and thoroughly before using the instrument. - Page 3 • Water damage restoration contractors • HVAC/R system installers and technicians • 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...
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Page 4: Key Features
The EP8709 is powered by one “9V” battery (included). KEY FEATURES • Jumbo backlit display with 2-line readout •... - Page 5 Fig. 1. The EP8709’s controls, indicators and physical structures A. Humidity and temperature sensors B. LCD (Power on/off) button D. F/C button E. WBT (wet bulb temperature) button F. DEW button G. HOLD button H. MAX/MIN button I. Battery compartment...
- Page 6 Fig. 2. All possible display indications and their meanings A. Low battery icon B. Data hold indicator C. Maximum reading indicator D. Minimum reading indicator E. °C indicator F. °F indicator G. Wet bulb temperature indicator H. Dew point temperature indicator I.
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Page 7: Setup Instructions
SETUP INSTRUCTIONS INSTALL BATTERY 1. The meter’s battery compartment (Fig. 1, Callout I) is accessible from the bottom of the unit. Use a Phillips-head screwdriver to loosen the single screw in the back of the unit that holds the yellow battery compartment cover in place. - Page 8 HOLD button again. This will cause HOLD to disappear from the RH readout. Pressing any button turns on the green backlight for 10 seconds. To extend the life of the “9V” battery powering the EP8709, the unit’s Auto Power...
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Page 9: Tracking Min And Max Levels
DEW button. The APO function will be enabled the next time you power on the unit in the normal way. To power off the EP8709, press and hold button for at least 3 seconds. TRACKING MIN AND MAX LEVELS After being powered on, the EP8709 automatically operates in “Recording”... -
Page 10: Calibrating The Meter
Min/Max mode clears the Min/Max memory and begins a new measurement session. CALIBRATING THE METER Your EP8709 was calibrated at the factory, so its measurements should remain within their specified tolerance for several years. However, you can re-calibrate the unit... - Page 11 Before beginning the calibration procedure—which is a turnkey process but takes at least 80 minutes to complete—you must disable the APO function so the instrument can remain on for more than 20 minutes. To disable the APO function, power on the unit in a special way by pressing and holding the DEW button while pressing the button.
- Page 12 5. Remove the meter from the 33% salt bottle and again press, hold and release the DEW and F/C buttons at the same time. Doing so this time will cause _ _ _ .2 to appear on the lower readout. 6.
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Page 13: Specifications
SPECIFICATIONS Temperature Measurement Range: 14° to 122°F (-10° to 50°C) Temperature Measurement Accuracy: 1.8°F (±1°C) Temperature Measurement Resolution: 0.1° RH Measurement Range: 0 to 99.9% RH Measurement Accuracy: ±3% from 5% to 95% RH RH Measurement Resolution: 0.1% Response Time: <80 seconds Display Size: 1.7 in. -
Page 14: Operating & Maintenance Tips
Do not operate the EP8709 in the presence of a flammable or explosive gas or near an arc welder or induction heater. After subjecting the unit to a large change... -
Page 15: Warranty Information
Acceptance of the exclusive repair and replacement remedies described herein is a condition of the contract for purchase of this product. In no event shall General be liable for any incidental, special, consequential or punitive damages, or for any cost, attorneys’... -
Page 16: Return For Repair Policy
99 Washington Street Melrose, MA 02176 Phone 781-665-1400 Toll Free 1-800-517-8431 Visit us at www.TestEquipmentDepot.com Specifications subject to change without notice ©2015 GENERAL TOOLS & INSTRUMENTS NOTICE - WE ARE NOT RESPONSIBLE FOR TYPOGRAPHICAL ERRORS. MAN# EP8709 07/15/15 General Tools & Instruments...
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