1 Safety Regulations 1.1 Correct Use DF-8500 series gas detectors are used to measure toxic gases or oxygen. They are suitable for outdoor and indoor applications without limitations, e.g. petrochemical and gas industry, coal chemical industry, pharmaceutical industry and chemical industry.
Such paint deposits would interfere with the gas diffusion process. - Use only genuine MSA replacement parts when performing any maintenance procedures provided in this manual. Failure to do so may seriously impair instrument performance.
MSA’ s requirements. MSA shall be released from all obligations under this warranty in the events: 1. Calibration, debugging, maintenance, etc., are performed by persons other than personnel from MSA or authorized by MSA;...
The device is factory-calibrated and delivered ready for installation. First calibration is required after installation. After the detector is put into normal operation, it is recommended by MSA to perform calibration once every three months. The device has: - a gas sensor - a four digit 15-segment LED display - four LEDs for displaying the current status of the detector.
When preparing the assembly, make sure that the mounting arrangement is correct for the particular device. 3.1 Mechanical Installation 3.1.1 Dimensions Diagram(Unit: mm) Figure.3 DF-8500 Dimension Diagram...
JP2 JP3 公共端 1-2 1-2 公共端 有源 2-3 2-3 无 源 常闭 常开 Material in the dashed line rectangle is optional Remote Sensor 24V+ Sensor 24V- Connector Controller 4~20mA Figure 5-1 DF-8500 internal wiring (Low alarm relay configured as active mode)
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Remote Sensor 24V+ Sensor 24V- Connector Controller 4~20mA Figure 5-2 DF-8500 internal wiring (Low alarm relay configured as passive mode) Terminal name Application 24V + Connect to DC 24V+ 24V - Connect to DC 24V- 4-20MA (4~20) mA output of device...
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DF-8500 Gas Detector Terminal No. Terminal Name DC 24V+ DC 24V- (4~20)mA signal Figure 6 DF-8500 Power Connection Terminals Terminal No. Terminal Name Not energized,normally open Common terminal Not energized,normally closed Figure 6 DF-8500 relay terminals (Applicable to all relays) 1.
DF-8500 Gas Detector 4 Operation The device is factory-calibrated and delivered ready for installation. First calibration is required after installation. 4.1 Startup The device conducts self-checking during it starts up and sets the operating current as output signal (default: 4.0mA), then displays below information:...
M-03 Detector parameters view M-04 Calibration parameter setting M-05 Sensor replacement M-06 LED testing M-07 Loop testing M-09 Sensor information display M-10 Relay setting M-11 Relay testing M-13 Manual zero calibration M-14 Manual gain calibration Table 2 DF-8500 Menu Items...
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DF-8500 Gas Detector [M-00] -- Alarm(relay)reset This menu item is used to reset the alarm of detector. This menu item will be displayed only when the relay is set as locked. (1) Press “+” to select the menu item M-00.
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DF-8500 Gas Detector [M-03] -- Transmitter parameter view This menu item displays the device information, including gas type, measuring range, and firmware version. (1) Press “+” to select the menu item M-03. (2) Press the “ON” key and the scroll display will show “parameter name = parameter value”...
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DF-8500 Gas Detector Submenu Meaning Default Adjustable Range Remarks Parameter TEST GAS= Calibration gas No decimal point range: μmol / mol concentration setting 5 ~(range-1) or %V/V Decimal point range: 0.5~(range-0.1) CURRENT (4~20)mA output 90 ~ 150 OFFSET= fine tuning...
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DF-8500 Gas Detector (2) Press “ON” and the screen will display the menu for entering password. (3) Enter the password (see Section 4.4). (4) If you enter the correct password, you will enter the next submenu, and the countdown starts from 900 second (total 15 minutes), it means there will be no alarm when you replace the sensor during this time, the sensor service time will be cleared when pressing “ON”...
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DF-8500 Gas Detector Submenu Parameter Meaning TEMP= Current temperature display CURRENT= Output current (4~20)mA display Sensor output signal display ( for CO,H S,the signal is SIGNAL= approximately 0.5V;for O ,it is approximately 0.8V; for ETO,VCM,CH OH,it is approximately 0.8V; all in clean air) V_REF= Refer to voltage signal,approximately 0.5V...
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DF-8500 Gas Detector Note: 1) The energized/de-energized and self-locking/non-self-locking settings of high and low alarm relays cannot be set separately. 2) The alarm delay is only effective for low alarm relays. In addition, in the low alarm delay period, if the high alarm is triggered, the low alarm delay will end immediately, and trigger the low alarm at the same time.
For rare gas, e.g. ETO, methanol and VCM, it needs to be 24 hours. 4.3 Calibration To ensure the stable performance of the product, MSA recommends the users to perform the calibration every three months. The calibration flow should be 0.25 liter/minute and calibration should use calibration cap regulated by MSA.
DF-8500 Gas Detector It is recommended that all calibration components are connected before starting a calibration as it is necessary to apply test gas to the device during a countdown. Wait for calibration gas. After starting any calibration, calibration gas (zero or test gas) must be provided until the calibration is completed.
DF-8500 Gas Detector 6 Technical Data 6.1 Major technical parameters of the detector Detected gas Methane Enclosure Aluminium enclosure Explosion-proof Protection level: IP 67(not including the sensor) Dimensions, mm Approximately 275X125X106 (height × width × depth) Explosion-proof sign Ex d ia [ia Ga] IIC T6 Gb;Ex tD A21 IP66/IP67 T80℃...
This is equivalent to increasing the oxygen content. The display value will increase approximately 0.3% with 1% increase of the carbon dioxide. The DF-8500 oxygen sensor is not suitable for use in occasions where the carbon dioxide concentration exceeds 25% continuously.
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<0.5 Chlorine 13.7 <0.5 Ethanol Hydrogen sulfide Sulfur dioxide Ammonia Precautions for using DF-8500 ETO, VCM and methanol sensor: 1) Must use polytetrafluoroethylene (Teflon)tube for calibration, and the tube is short as much as possible to prevent adsorbing the gas.
Storage temperature range is (20±5)℃。 Please handle the electrochemical sensors in accordance with the professional requirements. 7 Accessories The DF-8500 package contains the standard installation accessories such as the sensor guard, mounting plates, clamps, screws and washers, and quick start guides. 7.1 Sensor Guard The sensor guard must be installed at all times except when an airflow adapter or conduit installation kit is used.
DF-8500 Gas Detector 9 Appendix 9.1 Output Status Digital Display LED Color Status Current Signal Number Green or Red Normal or alarm (4~20) mA Green (flicker) Start Green (flicker) Calibration 4mA or follow E-XX Yellow Fault Over range 20.5mA BOOT...
DF-8500 Gas Detector 9.2 Error Code Error Meaning Possible cause Countermeasure Code Device has not been The circuit board is new Configure the gas type BOOT configured Replace the flash self-check fault Mainboard fault E-07 electronic module Replace the RAM self-check fault...
DF-8500 Gas Detector 9.3 Timeout The automatic calibration has a 4-minute timeout; that is, the error code will appear if the automatic calibration cannot be completed within 4 minutes. When no keys are pressed for over 10 minutes, the menu will automatically return to the concentration measurement mode from any other screen.
10 Special conditions for the safe use according to SIL applications The DF-8500 Gas Monitor has been subjected to rigorous reliability and functional safety assessments, which have culminated in the gas monitor being certified to IEC 61508 by CSA. The tables below list the SIL parameters for this device.
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DF-8500 Gas Detector Possible structures and acquirable SILs The following table shows which structure has to be selected to fulfill the requirements of a specific SIL. LDM = Low Demand Mode HDM = High Demand or Continuous Mode SIL1 SIL2...
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DF-8500 Gas Detector Checking the relay output function is accomplished by proof test every 1 year. And contact welding shall be check by the proof test. The relay contacts must be protected with a fuse rated 0.6 of the nominal specified...
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