www.gastron.com38_39Version Contents Date1.0 * Initial revision of manual 2011. 06. 271.1 * Change typo for CO measurement range (10% -> 1.0%) 2011. 07. 131.2 * Revise Calibration Mode, Revise IR Sensor Data Mode 2011. 07. 251.3 * Add HART function 2012. 04. 032.0 * Add apparatus drawing and operation Flow, function 2012. 08. 213.0 * Revise current consumption and revise address 2013. 01. 284.0 * Add Maintenance Mode function 2013. 03. 285.0 * Add description on wire connection part for 485 communication* Modify Manual Version 2014. 04. 216.0 * Separate Factory Mode 2016. 09. 10.7.0 * Change Cable Entry installation regulation for explosion-proof instrument 45cm → 50mm 2017. 01. 207.1* Analog output Current - Over 110% LEL: Change 20mA ~ 21.4mA - 22mA* Initial operation state - Revise Self Test content* Revise GROUP OF GAS SEL Parameter Add SO2/VCM/FREON* Revise 7.2 CALIBRATION Menu change* Add content for FAULT 142017.07.047.2* Correct typo for Fault Table and add content* Revision of apparatus-related drawing* Revision of block diagram for GIR-30002017.07.267.3* Revise TABLE OF CONTENTS so as to start from item 3P* Revise measurement range 10,000ppm → 9,999ppm* Revise No.4 item DC 18 ~ 24V → DC 18 ~ 31V* Revise DC 18 ~ 24V → DC 18 ~ 31V* Revise value for Alarm1 Dead band Default 1.0 → 0.0* Revise value for Alarm2 Dead band Default 1.0 → 0.0* Revise HIGH SCALE ADJ. 1~10000 → 1~9999* For filling of combustible and toxic substances → For charging2017.08.187.4 * Arrange document form* Add wire connection diagram of driving method for 4~20mA 3wire sink 2017.09.067.5* Correct typo* Change temperature specification* Add warning paragraph2017.11.2912. Revision record