H391
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Catalog excerpts

PORTABLE ENGiNE TEST SETS & TRIMMERS The H391 TEMPCAL® Tester dynamically tests thermal switches and continuous-wire fire detection loops on or off aircraft, reducing maintenance time, increasing aircraft availability and improving safety. Tests thermal switches and continuous-wire fire detection systems with precision Is a solid-state device designed to be an effective and dependable tester Features a user-friendly design that requires little training for new users 1 TEMPCAL® is a registered trademark of Howell Instruments, Inc. .^8945 South Freeway Fort Worth, Texas 76140 www.howellinst.com 817-336-7411 Fax: 817-336-7874 info@howellinst.com

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Portable engine test sets & trimmers Functions Power Selects temp display in degrees Fahrenheit or degrees Celsius. Turns on and off an audible tone to signal thermal switch closure/opening (as applicable). Increases temp setting. (Holding the + button down will increase digit rate of change for temp setting.) Decreases temp setting. (Holding the - button down will decrease digit rate of change for temp setting.) Identifies to unit whether thermal switch under test is normally closed (NC) or normally open (NO). Display indicates temperature setting, TEMPCAL® Probe temperature in digits, °F...

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