User’s Guide Shop online at omega.com ® e-mail: info@omega.com For latest product manuals: www.omegamanual.
omega.com info@omega.com U.S.A.: Servicing North America: Omega Engineering, Inc., One Omega Drive, P.O. Box 4047 Stamford, CT 06907-0047 USA Toll-Free: 1-800-826-6342 (USA & Canada only) Customer Service: 1-800-622-2378 (USA & Canada only) Engineering Service: 1-800-872-9436 (USA & Canada only) Tel: (203) 359-1660 Fax: (203) 359-7700 e-mail: info@omega.com For Other Locations Visit omega.
TABLE OF CONTENTS Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . 2 – 3 What’s in the Package . . . . . . . . . . . . . . . . . . . . . . 3 Quick Start Guide . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Product Overview . . . . . . . . . . . . . . . . . . . . . . . 3 – 7 Setup Instructions . . . . . . . . . . . . . . . . . . . . . 7 – 11 Install Battery . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Perform Setup Procedure . . . . . . . . . . . . .
• Choice of three temperature units: °C, °F and °K • Data hold button • Manual temperature compensation (offset) for thermocouple(s) • Adjustable Auto Power Off trigger • Powered by “9V” battery WHAT’S IN THE PACKAGE Both models come in a white box with this user’s manual. The HH91 includes one “K” type bead thermocouple probe with a measurement range of 40° to 572°F (-40° to 300°C). The HH92 comes with two “K” type probes with the same range.
TOP Fig. 1. The controls, display and physical features of the HH91 and HH92 HH91 POWER MAX AVG MIN TC TYPE HOLD ENTER SETUP HH91 Keypad C°/F°K POWER MAX AVG MIN T1/T2/T1-T2 C°/F°K HOLD ENTER SETUP HH92 Keypad 1. Keypad 2. T1 jack for spade lug thermocouple 3. T2 jack for spade lug thermocouple (HH92 only) 4. Ambient temperature sensor 5. LCD 6. Flip-up stand (on back) 7.
POWER button. Powers thermometer on and off. TC TYPE button (HH91 only). Selects thermometer type (“K”, “J”, “T” or “E”) T1/T2/T1-T2 button (HH92 only). Selects one of four display options: a) T1 on primary readout and T2 on secondary readout b) T2 on primary readout and T1 on secondary readout c) T1-T2 on primary readout and T1 on secondary readout d) T1-T2 on primary readout and T2 on secondary readout °C/°F/K button. Selects temperature unit of primary and secondary readouts MAX/AVG/MIN button.
and change values of temperature compensation, Auto Power Off triggering time, relative time clock and local power line frequency. On HH92, also used to select thermocouple type (during Step 1 of Setup procedure). Fig. 2. All possible display indications 1. Auto Power Off enabled indicator 2. Low battery icon 3. OFFSET. Indicates that primary readout is showing thermocouple temperature compensation value 4. SETUP. Flashes during setup procedure 5. READ. Not used on HH91 or HH92 6. REC.
15. Relative time clock readout 16. min:sec. Relative time units 17. CAL. Flashes during calibration 18. INTERVAL. Not used on HH91 and HH92 19. hour:min. Relative time units 20. Type KJTERSN. Indicates selected thermocouple type SETUP INSTRUCTIONS INSTALL BATTERY To open the battery compartment, turn the thermometer over and lift the flip-up stand (Fig. 1, Callout 6) to gain access to the battery compartment (Callout 7). Remove the single Philips-head screw securing the battery compartment cover.
To enter Setup mode, press the SETUP button once. Doing so will clear all three readouts and cause the word SETUP to begin flashing on the top line of the LCD. SETUP will continue to flash until all steps of the setup procedure have been completed. Note: It’s important to understand that you must complete the entire 7-step Setup procedure shown above each time you initiate it. If you power off the thermometer during an interim step, none of your settings or changes will be saved.
maximum amount of temperature compensation allowable is ±6°C. You cannot apply temperature compensation using Fahrenheit or Kelvin units. After applying the desired amount of temperature compensation to T1, press the SETUP button again to save your setting and proceed to the next step. On the HH92, the next step is Step 2A––setting the amount of temperature compensation (offset) to be applied to the Channel 2 (T2) thermocouple.
After adjusting the APO triggering time, press the SETUP button again to proceed to Step 4. Step 4 enables you to reset the relative time clock to a time other the default value: how long it has been since the thermometer was powered on. The usual reason to change the value is to establish a new “zero” for the measurement timeline following any change that does not involve powering the thermometer off.
Step 6 enables you to enable or disable ambient temperature compensation for the thermometer’s thermocouple(s). At the beginning of Step 6, the term ntC (an abbreviation of normal temperature compensation) appears on the primary readout, with on displayed on the secondary readout. Press either the or button to change on to oFF. If you disable ambient temperature compensation, it will be re-enabled after the thermometer is rebooted.
OPERATING INSTRUCTIONS MONITORING TEMPERATURE(S) IN REAL TIME To measure temperatures sensed by one or more installed thermocouples, press the POWER button to activate the thermometer. On the HH91, the temperature sensed by the T1 thermocouple will appear on the primary readout. On the HH92, the temperature sensed by the T1 thermocouple will appear on the primary readout and the T2 temperature (if a T2 thermocouple is installed) will appear on the secondary readout.
To change the temperature unit used on the primary readout (HH91) or press the primary and secondary readouts (HH92), press the K, °F, °C button. Both models will “remember” the last selection and resume using that unit following a reboot. DISPLAYING MIN/MAX/AVG TEMPERATURES To display the minimum, maximum or average values of T1 (HH91) or T1-T2 (HH92) sensed during a measurement session (the period of time since the thermometer was last powered on), begin by briefly pressing the MAX/AVG/MIN button once.
Measurement Accuracy (excluding thermocouple error) from 64° to 82°F (18° to 28°C): ±(0.5% of reading + 0.9°F/0.5°C) Measurement Resolution: 0.1° (F or C) below 1000°; 1° (F or C) above 1000° Measurement Range of Included Thermocouple(s): -40° to 572°F (-40° to 300°C) Auto Power Off Trigger: Adjustable from 5 minutes to 1 hour; can be disabled Operating Temperature: 32° to 122°F (0° to 50°C) @<80% RH Dimensions: 7.5 x 3.5 x 1.6 in. (191 x 89 x 41mm) Weight: 14.1 oz.
WARRANTY/ DISCLAIMER OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase. OMEGA’s Warranty adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping time. This ensures that OMEGA’s customers receive maximum coverage on each product. If the unit malfunctions, it must be returned to the factory for evaluation.
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