MGS-550 Fixed Gas Detector50 P/N: 1100-1000 Version 15.5 Sensor Maintenance (Explosion Proof Housings)5.5.1 Components OverviewCAUTIONThis product uses semiconductors which can be damaged by electrostatic discharge(ESD). When handling the PCB, care must be taken so that the electronics is notdamaged.NOTICEIf the instrument has two sensors installed, and both sensors, modules or heads are tobe replaced, then replace and register them one at a time. Failing to do so might cause afault. Observe the sensor type (target gas, measuring range) and replace the sensorwith the same type.If sensors are to be replaced with different types, be sure to de-register the sensor(s)first, and then register them one at a time. Refer to the following sections:• 4.3.8: De-register All Sensors and Reset Node Address (F-08) on page 27• 4.3.7: De-register One Sensor (F-07) on page 27• 4.3.6: Register Sensor (F-06) on page 26.Item Description Replacement Instructions1 Sensor cable See figure above2 Sensor connector See figure above3 Sensing head base See figure above4 Sensor control board 5.5.3: Replacing the Sensor Control Board on page 525 Sensor module (sensorplus PCB)5.5.2: Replacing the Sensor Module on page 516 Optional spacer See figure above (optional)7 Foam piece See figure above8 Sensing head cap See figure above1-8 Entire Assy (Local) 5.5.4: Replacing the Local Sensing Head Assembly on page 531-8 Entire Assy (Remote) 5.5.5: Replacing the Remote Sensing Head Assembly on page 54www. .com information@itm.com1.800.561.8187
