Omega HH-23A User Manual

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User’sGuide

®

http://www.omega.com e-mail: info@omega.com

HH-21A, HH-22Aand HH-23A

Handheld Microprocessor Digital

Thermometers

Omega HH-23A User Manual

omega.com TM

OMEGA®

 

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It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that apply. OMEGA is constantly pursuing certification of its products to the European New Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification.

The information contained in this document is believed to be correct but OMEGA Engineering, Inc. accepts no liability for any errors it contains, and reserves the right to alter specifications without notice.

WARNING: These products are not designed for use in, and should not be used for, patient connectedapplications.

TABLE OF CONTENTS

General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Difference Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Manual Addenda. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Unpacking and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Safety Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Battery Installation/Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Memory Backup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Operation with Rechargeable Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Operating Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1. Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2. Display Annunciators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3. Function Keys. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Service Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

1. Calibration Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2. Disassembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3. Mechanical Parts Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

1

GENERAL INFORMATION

This manual provides information on the use of three digital handheld thermometers. Functional features both common and unique to each model are described.

All three models are microprocessor based, and provide accurate and reliable operation. They function with the most popular thermocouples; types K, J, and T. A variety of features in these projects enhance their versatility, while simplifying operation.

It is recommended that you read this manual thoroughly, especially the sections on safety, prior to operating these instruments.

SPECIFICATIONS

THERMOCOUPLE INPUTS: 2 (T1, T2) miniature TC connectors. Accepts male miniature and subminiature TC connectors.

THERMOCOUPLE TYPES: K, J, T

READOUT: T1, T2, T1-T2, and SCAN (T1, T2, T1-T2).

ACCURACY: (18°C to 28°C ambient, 2 years, excludes thermocouple error).

TC

 

 

 

 

Extended Temp.

Type

Range

Resolution

Accuracy (T1, T2)

Accuracy (T1-T2)

Range Acc’y (T1, T2), Typ.

 

 

 

 

 

 

K

0°C to 1372°C

0.1/1°C

±(0.1% rdg + 0.6°C)

Acc’y (T1) + Acc’y (T2)

–200°C to –250°C, ±(3°C)

 

32°F to 2502°F

0.1/1°F

±(0.1% rdg + 1.0°F)

Acc’y (T1) + Acc’y (T2)

–328°F to –418°F, ±(5°F)

 

–200°C to 0°C

0.1/1°C

±(0.3% rdg + 0.6°C)

Acc’y (T1) + Acc’y (T2)

 

 

–328°F to 32°F

0.1/1°F

±(0.3% rdg + 1.0°F)

Acc’y (T1) + Acc’y (T2)

 

 

 

 

 

 

 

J

0°C to 760°C

0.1/1°C

±(0.1% rdg + 0.6°C)

Acc’y (T1) + Acc’y (T2)

 

32°F to 1400°F

0.1/1°F

±(0.1% rdg + 1.0°F)

Acc’y (T1) + Acc’y (T2)

 

–210°C to 0°C

0.1/1°C

±(0.3% rdg + 0.6°C)

Acc’y (T1) + Acc’y (T2)

 

–346°F to 32°F

0.1/1°F

±(0.3% rdg + 1.0°F)

Acc’y (T1) + Acc’y (T2)

 

 

 

 

 

 

T

0°C to 400°C

0.1/1°C

±(0.1% rdg + 0.6°C)

Acc’y (T1) + Acc’y (T2)

–200°C to –250°C, ±(3°C)

 

32°F to 752°F

0.1/1°F

±(0.1% rdg + 1.0°F)

Acc’y (T1) + Acc’y (T2)

–328°F to –418°F, ±(5°F)

 

–200°C to 0°C

0.1/1°C

±(0.3% rdg + 0.6°C)

Acc’y (T1) + Acc’y (T2)

 

 

–328°F to 32°F

0.1/1°F

±(0.3% rdg + 1.0°F)

Acc’y (T1) + Acc’y (T2)

 

 

 

 

 

 

 

REPEATABILITY: ±0.2°C typical for 1 week at constant ambient temperature.

TEMPERATURE COEFFICIENT: 18°C to 28°C; included in accuracy specification. From 0°C to 18°C, and 28°C to 50°C; less than ±(0.02% rdg + 0.1°C)/°C.

ENVIRONMENTAL LIMITS FOR OPERATING: 0°C to 50°C, less than 80% relative humidity (R.H.) up to 35°C; reduce R.H. limit by 3%/°C from 35°C to 50°C.

ENVIRONMENTAL LIMITS FOR STORAGE: –35°C to 60°C, less than 90% relative humidity (R.H.) up to 35°C; reduce R.H. limit by 3%/°C from 35°C to 60°C.

INPUT CURRENT: 50 nA typical.

READING RATE: (T1, T2, T1-T2); 1 reading/second typical, all parameters.

2

MAXIMUM COMMON MODE VOLTAGE: 42V peak to earth.

POWER: 9 volt transistor battery (NEDA 1604).

BATTERYLIFE, CONTINUOUS: 50 hrs typical, carbon-zinc; 100 hrs typical, alkaline; 200 hrs typical, lithium; 15 hrs typical, Ni-Cd (rechargeable).

BATTERYINDICATOR: Display indicates BAT when less than 10% of life remains.

DISPLAY: 5 digit LCD, 0.4" height. Polarity indication, and decimal point. Annunciators

Readout Parameter: T1, T2, T1-T2, SCAN

Record Parameter: MIN or MAX (when viewing recorded data).

Readout Scale: °F, °C

TC Type: K, J, T

Hold (when activated)

Reading Trend: up-arrow for increasing readings, down-arrow for decreasing readings. Both arrows on for stable reading.

Record MIN/MAX readings for T1, T2, and/or T1-T2; Flashing annunciator indicates data being collected. Steady annunciator indicates data available, but not being up-dated.

KEYPAD: 9 momentary switches with tactile feedback select;

Power ON/OFF

Readout: T1, T2, T1-T2, or SCAN

TC type: K, J, T

Readout scale: °F/°C

Resolution: 0.1°/1°

Display Hold

Record MIN/MAX

View MIN/MAX

Stop recording MIN/MAX (first keystroke), clear recorded MIN/MAX (second keystroke)

POWER OFF CONFIGURATION RETENTION: Instrument retains last selected;

Readout: T1, T2, T1-T2, SCAN

TC type: K, J, T

Resolution: 0.1°/1°

Scale: °F/°C

DIAGNOSTICS: Display codes indicate the following conditions:

Low Battery: ‘BAT’

Open Thermocouple(s): ‘OPEN’

Invalid Keypad Entry: Momentary ‘E-1’

Temperature Reading exceeds TC Rating: ‘E-2’

Internal Hardware Fault: ‘E-3’ (consult factory)

LCD Test: During power-up, all segments/annunciators turned on momentarily.

ELECTROMAGNETIC COMPATIBILITY: Add ±0.5% of range to accuracy specifictions for RF fields up to 1 volt/meter. Accuracy not specified for fields greater than

1 volt/meter.

DIMENSIONS, WEIGHT: 7.0" x 2.9" x 1.1". Net weight 10 oz.

3

DIFFERENCE SPECIFICATIONS

MODEL HH-21A:

THERMOCOUPLE INPUTS: 1

DISPLAY: 5 digit LCD, 0.4" height. Polarity indication, and decimal point. Annunciators

Readout Scale: °F, °C

TC Type: K, J, T

Hold (when activated)

KEYPAD: 5 momentary switches with tactile feedback select;

Power ON/OFF

TC type: K, J, T

Readout scale: °F/°C

Resolution: 0.1°/1°

Display Hold

POWER OFF CONFIGURATION RETENTION: Instrument retains last selected;

TC type: K, J, T

Resolution: 0.1°/1°

Scale: °F/°C

MODEL HH-22A:

THERMOCOUPLE TYPES: K, J

4

FEATURES

Temperature trend indication (rising, falling, or stable)

Full range resolution of 0.1 degree

Work with thermocouple types K, J and T

Keypad selectable °F or °C

Two probe inputs (for two point temperature measurements)

Calculates and displays temperature difference between the two probe inputs

Maximum and minimum temperature storage

Dust proof, splash proof, drop proof construction

Built-in tilt stand/hanger for bench use or hands free field measurements

User friendly function programming

Performs self diagnostic test and displays error readout

Retains function settings, even when turned off

Low battery and open sensor indication

Input data scan and display hold modes

MANUAL ADDENDA

Improvements or changes to this manual will be explained on an addendum included with the instrument. All change information should be incorporated immediately into the appropriate places in the manual.

UNPACKING AND INSPECTION

Each instrument is inspected both mechanically and electrically before shipment. Upon receiving your instrument unpack all items from the shipping container and check for any obvious damage that may have occurred during transit. Report any damage to the shipping agent. Retain and use the original packing materials if reshipment is necessary.

5

SAFETY INFORMATION

SAFETY SYMBOLS AND TERMS

The symbol ! on the instrument denotes that the user should refer to the operating instructions.

The WARNING used in this manual explains dangers that could result in personal injury or death.

The CAUTION used in this manual explains hazards that could damage the instrument.

SAFETY PRECAUTIONS

WARNING

These instruments are intended for use by qualified personnel trained in the safe operation of electronic testing equipment. Read the instruction manual thoroughly before using, to become familiar with the instrument’s operations and capabilities.

WARNING

Do not touch a temperature probe sheath when measuring excessively high or low temperatures, or toxic substances.

WARNING

Do not attempt to measure temperatures beyond the range of the probe being used. Probe damage or personal injury could result from exceeding a probe’s maximum temperature rating.

WARNING

The American National Safety Institute (ANSI) states that a shock hazard exists when probes or sensors are exposed to voltage levels greater than 42VDC or 42V peak AC. Do not use this instrument where voltages at the measurement surface exceed these levels.

6

WARNING

Do not substitute a m etal part for the nylon screw in the rear case. Doing so will degrade electrical isolation of the case.

WARNING

The battery is accessible through a cover on th e back of the in strument. To a void ele ctrical shock h azard, disconnect all temperature probes and sensors and turn the unit off before removing the cover.

WARNING

Never use this instrument or any probe or sensor inside a microwave oven.

CAUTION

Avoid making sharp bends in probe or sen sor lead wires. Bending lead wires at a sharp angle can damage the wire causing probe failure.

CAUTION

When using both thermometer inputs, and a voltage differential exists between the two measurement points, at least one probe should be electrically insulated. If not, groundloop current can flow t hrough the th ermocouple le ads causing measurement error or instrument damage.

7

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