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Summary of Contents for General EP8710
- Page 1 CALIBRATABLE 7-FUNCTION PSYCHROMETER USER’S MANUAL EP8710 Please read this manual carefully and thoroughly before using this product.
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Page 2: Table Of Contents
Warranty Information ....19 Return for Repair Policy ... . . 20 INTRODUCTION Thank you for purchasing General Tools & Instruments’ EP8710 Calibratable 7-Function Psychrometer. Please read this user’s manual carefully and thoroughly... - 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
2) a solid object’s condensation temperature—the difference between its surface temperature and the dew point temperature The EP8710 is powered by one “9V” battery (included). KEY FEATURES • Jumbo backlit display with 2-line readout • Field calibratable using optional 33% and 75% salts •... -
Page 5: What's In The Box
WHAT’S IN THE BOX The EP8710 comes fully assembled in a box along with a sensor protection cap, an external temperature probe, a “9V” battery and this user’s manual. PRODUCT OVERVIEW Figure 1 shows all of the controls, indicators and physical structures on the front, top and bottom of the EP8710. - Page 6 Fig. 1. The EP8710’s controls, indicators and physical structures A. Humidity and temperature sensors B. LCD (Power on/off) button D. HOLD button (Ambient/dew point temperature) button...
- Page 7 F. Battery compartment G. MAX/MIN button Probe/condensation/wet bulb temperature) button I. F/C button J. External temperature probe plugged into jack on side of unit Fig. 2. All possible display indications and their meanings A. Low battery icon B. Data hold indicator C.
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Page 8: Setup Instructions
I. Condensation temperature ( ) indicator (available only with external probe plugged in). An object’s condensation temperature is the difference between its surface temperature and the dew point temperature. J. Probe temperature (T2) indicator (available only with external probe plugged in) K. -
Page 9: Operating Instructions
2. Plug the included “9V” battery into the wired socket inside the compartment. The terminals of the battery and the socket mate in only one way, with the smaller male terminal plugging into the larger female terminal. 3. Replace the battery compartment cover and tighten the screw to secure it to the housing. - Page 10 Pressing any button turns on the green backlight for 10 seconds. To extend the life of the “9V” battery powering the EP8710, the unit’s Auto Power Off (APO) function will automatically shut down the instrument if no front-panel buttons are pressed within any 20-minute period.
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Page 11: Using The External Temperature Probe
To power off the EP8710, press and hold button for at least 3 seconds. USING THE EXTERNAL TEMPERATURE PROBE The external temperature probe included with the EP8710 can measure the surface temperature of any solid object, the internal temperature of an object (if it can be penetrated), or the temperature of a liquid or gas. -
Page 12: Tracking Min And Max Levels
TRACKING MIN AND MAX LEVELS After being powered on, the EP8710 automatically operates in “Recording” mode for the purpose of tracking maximum and minimum RH and ambient temperature measurements. To display the maximum RH and ambient temperature values measured since the meter was powered on, press the MAX/MIN button once. -
Page 13: Calibrating The Meter
CALIBRATING THE METER Your EP8710 was calibrated at the factory, so its measurements should remain within their specified tolerance for several years. However, you can re-calibrate the unit yourself to reassure yourself of the accuracy of readings, especially after the instrument has been operated for many hours in a dusty environment. - Page 14 2. Turn the unit upside-down and insert the sensor structure in the opening of the 33% salt bottle after removing the bottle’s cap. The fit should be tight, with no air leaking into the bottle. 3. Leave the unit upside-down in the 33% salt bottle for at least 40 minutes.
- Page 15 9. Store the calibration adjustment you have just made by pressing the button. The EP8710 is now calibrated to the 33% reference standard. Remove the unit from the 33% salt bottle. 10. Insert the EP8710 upside-down in the opening of the 75% salt bottle after removing the bottle’s cap.
- Page 16 “- -.2”. Two calibrations constitute a cycle. 17. Store the calibration adjustment you have just made by pressing the button. The EP8710 is now calibrated to the 75% reference standard.
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Page 17: Specifications
SPECIFICATIONS Ambient Temperature Measurement Range: 14° to 122°F (-10° to 50°C) Ambient Temperature Measurement Accuracy: 1.8°F (±1°C) External Temperature Probe Measurement Range: 14° to 158°F (-10° to 70°C) External Temperature Probe Measurement Accuracy: ±1.8°F (±1.0°C) External Probe Cord Length: 48 in. (1.22m) Temperature Measurement Resolution: 0.1°... -
Page 18: Operating & Maintenance Tips
Do not operate the EP8710 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 19: 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 20: Return For Repair Policy
80 White Street New York, NY 10013-3567 PHONE (212) 431-6100 FAX (212) 431-6499 TOLL FREE (800) 697-8665 e-mail: sales@generaltools.com www.generaltools.com EP8710 User’s Manual Specifications subject to change without notice ©2013 GENERAL TOOLS & INSTRUMENTS NOTICE - WE ARE NOT RESPONSIBLE FOR TYPOGRAPHICAL ERRORS. MAN#EP8710 5/3/13...
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