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Table of Contents
Summary of Contents for Kewtech KEW301
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Page 2: Table Of Contents
CONTENTS TITLE PAGE I. Introduction……………………………………..1 II. Specifications………………………………….1 III. Symbol Definition and Button Location…….4 IV. Operation Instructions……………………….6 4.1 Power-Up………………………………..6 4.2 Connection the Thermocouples…..…..6 4.3 Selecting the Temperature Scale……6 4.4 Data-Hold Operation……………..6 4.5 T1, T2, T1-T2 Display Control……….6 4.6 Relative Operation…………………….7 4.7 MAX/MIN/AVG Operation…….….…….7 4.8 Auto Power Off…………….……….…...8 4.9 Low Battery Condition.…….…………..8 4.10 Calibration Point………………………8... -
Page 3: Introduction
KEW301 I. Introduction: This instrument is a digital thermometer for use with any K-type thermocouple as temperature sensor. Temperature indication follows National Bureau of Standards and IEC584 temperature/voltage table for K-type thermocouples. II. Specifications: Numerical Display: 4 digital liquid crystal display Measurement Range: -200°C ~ 1370°C ;... - Page 4 KEW301 Accuracy: at (23 ± 5°C) Range Accuracy -200°C ~ 200°C ±(0.3% reading + 1°C) 200°C ~ 400°C ±(0.5% reading + 1°C) 400°C~1370°C ±(0.3% reading + 1°C) -328°F ~ -400°F ±(0.5% reading + 2°F) -200°F ~ 200°F ±(0.3% reading + 2°F) 200°F ~ 400°F...
- Page 5 KEW301 Accessory: K Type Bead Probe, Battery, Carrying Case, Instruction Menu. Option: Soft Ware Package ( Program, RS232 Connection Cable) , AC Adapter. Power requirement: 9 Volt Battery, NEDA 1604 or JIS 006P or IEC6F22 Battery Life: Approx. 100hrs with alkaline battery AC Adapter: 9VDC ±15% 100mA ;...
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Page 6: Symbol Definition And Button Location
KEW301 III. Symbol Definition and Button Location: Main Display Second Display : This indicates that the minus temperature is sensed. : Centigrade and Fahrenheit indication. °C °F : Thermocouple Type Indication : This indicates that the display data is HOLD being hold. - Page 7 KEW301 T1 K type temperature sensor connector ○ T2 K type temperature sensor connector ○ LCD display ○ ON/OFF button ○ HOLD button ○ T1, T2, T1-T2 control button ○ Relative readout button ○ MAX MIN Average control button ○...
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Page 8: Operation Instructions
KEW301 IV. Operation Instructions: 4.1 Power-Up: Press the ○ I key to turn the thermometer On or OFF. 4.2 Connection the Thermocouples: For measurement, plug the thermocouple into the input connectors. 4.3 Selecting the Temperature Scale: When the meter was first power on, the default scale setting is set at Celsius (°C) scale. -
Page 9: Relative Operation
KEW301 show on the main display, T1 and T2 will be shown on the second display alternately. 4.6 Relative Operation for Main Display: When one press the “△REL” button, the meter will memorize the present reading and the difference between the new reading and the memorized data will be shown on the display. -
Page 10: Auto Power Off
KEW301 To exit the MAX/MIN mode, one may press and hold for two seconds. 4.8 Auto Power Off: By default, when the meter is powered on, it is under auto power off mode. The meter will power itself off after 30 minutes if no key operation or RS232 communication. -
Page 11: Digital Output
KEW301 4.11 Digital Output: The Digital Output is a 9600bps N 81 serial interface. The RX is a 5V normal high input port. The TX is a 5V normal high output port. The command of Digital Output is list below. - Page 12 KEW301 ‧ Command D: Return data of main window. Range: T1, T2, T1-T2 (7bytes), the unused characters is left as space ASC(13). Data: ±9999.9,-OL,OL ( 7bytes include polarity and decimal point), Unit: C,F(5bytes) When the meter receive the D command, it will send : Range□Data□Unit.
- Page 13 KEW301 /MAX/MIN button and no message is returned. ‧ Command R: Equivalent to one pushing on the REL button and no message is returned. ‧ Command C: Equivalent to one pushing on the C/F button and no message is returned.
- Page 14 KEW301 BYTE: bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 point minus point minus bit0: 1→ main window value is OL 0→ not OL bit1: 1→ main window value is minus, 0→ main window value is plus. bit2: 1→ 4...
- Page 15 KEW301 BYTE: Last two BCD code of sub window value. BYTE: The last byte is the end byte, it value is 3, first and last byte are used to check frame error.
- Page 16 GCBKEW301-02000...