ENMET Corporation PO Box 979 Ann Arbor, MI 48106-0979 www.enmet.
Table of Contents 1.0 INTRODUCTION ....................................................................................................................................................... 1 1.1 Unpack ...............................................................................................................................................................................1 1.2 Check Order .......................................................................................................................
EX-5120 ENMET Corporation 1.0 Introduction The ENMET EX-5120 infrared sensor/transmitter (S/T) is a 3-wire, 24Vdc, 4-20mA S/T for the detection of combustible gas. The EX-5120 is meant to be used in conjunction with an appropriate power supply and controller. The ENMET EX-5120 sensor/transmitter has been designed for use in a Class I, Div. 1, Groups B, C, D, classified areas. NOTE: All specifications stated in this manual may change without notice. 1.
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EX-5120 ENMET Corporation 3.0 Installation of the EX-5120 CAUTION: Area must be declassified during installation. The ENMET EX-5120 gas sensor/transmitter (S/T) is a 3-wire, 24 Vdc, 4-20 mA S/T for the detection of combustible gas. The S/T is meant to be used in conjunction with an appropriate power supply and controller. The ENMET EX-5120 sensor/transmitter is in an enclosure rated for use in a Class I, Div. 1, Groups B, C, D, classified area.
EX-5120 ENMET Corporation 3.2 Wiring the EX-5120 to a Control Unit CAUTION: Area must be declassified during installation. Run conduit and 16 AWG (1.5MM2) wires to the enclosure from the power supply and controller. If the EX-5120 is installed in a hazardous location as defined by the National Electrical Code, then ALL wiring must be in accordance with the National code and any local governing codes. Open the enclosure, and remove the 2 screws that retain the display overlay to the circuit board.
EX-5120 ENMET Corporation Display Overlay Display Overlay Screws (2 places) Display Overlay Display Magnetic Switches (2 places) Display Overlay Standoffs (2 places) Printed Circuit Board (PCB) J4 and J8 Terminals are located on the bottom side of PCB Optional Relay Output Circuit Board Sensor/Transmitter Enclosure Cutaway View Display Overlay Magnetic Switches (2 places) Printed Circuit Board (PCB) Figure 3: Terminal Positions EX-5120 Sensor/Transmitter When wiring is complete, reassemble the EX-5
EX-5120 ENMET Corporation 4.0 Operation of the EX-5120 It is best to have the EX-5120 transmitters powered up, operational and stable for several minutes before applying calibration or test gas to them. When the EX-5120 transmitter is first powered up, it goes through a series of momentary screens, which identify the instrument model number, serial number and software revision.
EX-5120 ENMET Corporation 4.2 Normal Display Mode When the EX-5120 is installed as described in section 3, and in clean air, the POWER green LED is on, the display is lit and the information on the display is measurement of the target gas detected by the EX-5120. The red alarm and fault LEDs are not lit. To advance through displays of operational information tap the magnet over the MENU button. NOTE: Software revision may cause variations of display output.
EX-5120 ENMET Corporation 5.0 Maintenance of the EX-5120 CAUTION: Do not open the EX-5120 S/T in a classified area. CAUTION: Do Not Attempt A Span Procedure Without Calibration Gas Applied to The Sensor; if this is done, the S/T is forced into a calibration fault mode. Magnetic switches control the MENU and SELECT functions. The MENU and SELECT switch locations are indicated on the display panel, see Figure 3.
EX-5120 ENMET Corporation 5.2 Calibration of the EX-5120 Calibration is the process of setting the instrument up to read accurately when exposed to a target gas. The Zero function sets the clean air reference point and the Span function sets the sensitivity of the instrument. Initial Calibration: Wait several minutes for stabilization after supplying power to the EX-5120 sensor/transmitter (S/T) before initial calibration.
EX-5120 ENMET Corporation 5.2.2 Gas Span It is recommended that the Zero Function be performed first. Enter the maintenance menu. See Figure 5, EX-5120 Maintenance Menu flow chart. 1. Tap the MENU switch once to show Span on the display. 2. Tap the SELECT switch to perform a Span procedure. The display will alternate between the calibration gas concentration and a signal level. NOTE: You can change the Calibration Gas Level.
EX-5120 ENMET Corporation Span SELECT PV: 0 50 MENU Cal OK OR mV OR Bad Alarm1 SELECT MENU Λ 10 SetTDsec SELECT MENU Λ 20 SetTDsec 0 Alarm3 SELECT Apply Calibration Gas until signal value becomes stable (about 1 to 4 minutes) See Figure 4 If cal is good display will indicate OK or Same If cal is not within preset “range” display will indicate Bad Sens Sens 0 Alarm2 The MENU switch changes digit indicated by underscore cursor The SELECT switch locks underscored digit and moves to ne
EX-5120 ENMET Corporation 5.3 Sensor Replacement CAUTION: Area must be declassified during sensor replacement. Sensors should be replaced when they can no longer be calibrated. Replacement sensor part numbers are listed in Section 6.0 of this manual. If you do not know the proper part number for your sensor, be sure to have the EX-5120 serial number available when contacting your Distributor or ENMET Corporation Technical Support. To replace a sensor, it is not necessary to open the transmitter housing.
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EX-5120 ENMET Corporation 7.0 WARRANTY ENMET warrants new instruments to be free from defects in workmanship and material under normal use for a period of one year from date of shipment from ENMET. The warranty covers both parts and labor excluding instrument calibration and expendable parts such as calibration gas, filters, batteries, etc... Equipment believed to be defective should be returned to ENMET within the warranty period (transportation prepaid) for inspection.
PO Box 979 680 Fairfield Court Ann Arbor, Michigan 48106-0979 734.761.1270 Fax 734.761.3220 Returning an Instrument for Repair ENMET instruments may be returned to the factory or any one of our Field Service Centers for regular repair service or calibration. The ENMET Repair Department and Field Service Centers also perform warranty service work.
Repair Return Form Mailing Address: ENMET Corporation PO Box 979 Ann Arbor, Michigan 48106 Phone Number: FAX Number: Shipping Address: ENMET Corporation Attn: Repair Department 680 Fairfield Court Ann Arbor, Michigan 48108 734.761.1270 734.761.
