Omega Engineering HH-21 Скачать руководство пользователя страница 26

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Schematic

Designation*

Description

Part Number*

I.C., Schmitt Inv.

IC-834

U11

I.C., LCD Controller

IC-761

U12

I.C., EEPROM

IC-851

U13

(3)

I.C., Microcomputer

LSI-120

Resonator, Ceramic, 1MHz

CR-60

—

Keypad

(4)

—

Connector, LCD

CS-810

—

Clip, Battery

865-306-1

—

Header, Pin

CS-790-2

* Numbers in parentheses refer to notes below:

(1) Deleted from Model

HH-21

(2) Matched pair.

(3) Full part number by Model:

HH-21

; LSI-120-819

HH-22

; LSI-120-820

HH-

; LSI-120-821

(4) Part number by Model:

HH-21

; 819-322

HH-22

; 821-322-C

HH-23

; 821-322-C

Содержание HH-21

Страница 1: ......

Страница 2: ......

Страница 3: ...lation 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 Pr...

Страница 4: ...eek 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 OPERAT...

Страница 5: ...dicates 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...

Страница 6: ...nciators 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 O...

Страница 7: ...splays 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...

Страница 8: ...nstruction 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 te...

Страница 9: ...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 sensor lead wires Bending lead wires at a sharp angle...

Страница 10: ...ng it off in the direction of the arrow located on the battery cover 2 Remove the old battery 3 Place the new battery in the battery compartment Be sure to observe proper polarity 4 Re install the bat...

Страница 11: ......

Страница 12: ...us operation This duration can be extended indefinitely by operating simultaneously from both the battery and recharger OPERATING INSTRUCTIONS The following instructions make reference to keypad input...

Страница 13: ...mo couple type Remove thermocouple from temperature source WARNING Do not touch the probe sheath when measuring excessively high or low temperatures WARNING Probe damage and personal injury could resu...

Страница 14: ...hen less than 10 of battery life remains 5 K J T Thermocouple Type Annunciator These symbols indicate the thermocouple type selection NOTE To insure correct temperature readings the displayed thermoco...

Страница 15: ...into the appropriate TC connector will give actual thermocouple temperature readings If the unit is turning on for the first time after installation of a new battery it will default to K type thermoco...

Страница 16: ...retained during power off To insure proper temperature readings be sure that the displayed thermocouple type matches the type of thermocouple you are using The HOLD key when pressed will freeze the te...

Страница 17: ...atures is enabled This function can be activated in one or more of the 3 measurement modes T1 T2 and T1 T2 To start recording select a desired measurement mode T1 T2 or T1 T2 then press REC When more...

Страница 18: ...instructions to stop recording In this case the VIEW function will display static data that does not update The VIEW function cannot be initiated while the readout is in the SCAN mode For example to v...

Страница 19: ...y See REC If the STOP CLR key is pressed again after stopping data recording MIN MAX data for the corresponding measurement mode is cleared and the REC annunciator is turned off NOTES MIN MAX data is...

Страница 20: ...1 Turn OFF U U T 2 Remove rear cover Refer to Disassembly Instructions 3 Remove shorting plug J1 from circuit board Refer to Mechanical Parts Diagram for location P N CS 791 4 Replace rear cover Reins...

Страница 21: ...0 F type T 20 Press HOLD key one last time Wait for HOLD annunciator to show on readout Indicates that calibration data is stored in EEPROM 21 Carefully remove battery cover while holding battery in p...

Страница 22: ...edure CAUTION Do not use excessive torque when re installing the nylon machine screw into the rear case Excess torque will dam age the part WARNING Do not substitute a metal part for the nylon machine...

Страница 23: ......

Страница 24: ...22 4 COMPONENT LAYOUT...

Страница 25: ...or Carbon R 76 15M R3 4 9 13 14 15 16 Resistor Metal Film R 88 1K 32 R5 6 Resistor Metal Film R 88 909K R7 21 24 25 26 27 Resistor Metal Film R 88 10K 28 33 R8 Resistor Metal Film R 88 23 7K R10 Resis...

Страница 26: ...LSI 120 Y1 Resonator Ceramic 1MHz CR 60 Keypad 4 Connector LCD CS 810 Clip Battery 865 306 1 Header Pin CS 790 2 Numbers in parentheses refer to notes below 1 Deleted from Model HH 21 2 Matched pair...

Страница 27: ...25 6 SCHEMATIC DIAGRAMS 1 Signal Conditioning and A D...

Страница 28: ...26 2 Microcomputer and Display...

Страница 29: ...27 3 Power Supply...

Страница 30: ......

Страница 31: ......

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