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Summary of Contents for Det-Tronics UD20
- Page 1 Instructions ® FlexVu Explosion-Proof Universal Display Unit Model UD20 Rev: 6/15 95-8620...
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Page 2: Table Of Contents
Table Of Contents APPLICATION ......1 DESCRIPTION ......1 HART Communication . -
Page 3: Application
During normal operation, the UD20 continually polls the gas detector for status information. Because the UD20 is a primary master, a secondary master can also be used to communicate with the gas detector at the same time. If an Asset Management System (AMS) is used, it should be configured as a secondary master to avoid communication conflicts with the UD20. -
Page 4: Magnetic Switches
UD20 include: • Calibration • Sensor running hours • Sensor temperature • Events PREVIOUS OUTpUT TEST CANCEL / ESCAPE The UD20 can start and stop a 4-20 mA Loop Test for checking correct operation of system output devices. ENTER / SELECT NEXT B2426 Figure 1—Faceplate of UD20 95-8620... -
Page 5: Important Safety Notes
Zero Drift Faults are not specifically indicated by the UD20. When the process variable drops between 3.9 CaUtIon and 3.1 mA, no fault is indicated by the UD20. When the Unused entries must be closed with suitably process variable reaches 3.0 mA, the UD20 will display certified blanking elements upon installation. -
Page 6: Identification Of Detector Mounting Locations
The maximum cable length between the termination identifying the best detector mounting locations. In box and the UD20 is 2000 ft. addition, identification of air current / wind patterns within the protected area is useful in predicting gas leak dispersion behavior. -
Page 7: Wiring Cable Requirements
The device can be powered off the PIRECL detector in a two-wire configuration. Figures 5 through 8 illustrate CaUtIon the Eclipse wired to a UD20 with the 4-20 mA output The use of proper conduit installation techniques, shown in various wiring schemes. - Page 8 THE 250 OHM RESISTOR, ACROSS J2-5 AND J2-6, OR ACROSS J2-2 AND J2-3. NOTE 4 JUNCTION BOXES MUST BE ELECTRICALLY CONNECTED TO EARTH GROUND. B2483 Figure 4—Basic Wiring for Explosion Proof UD20 and GT3000 with Terminal Box PIRECL POINTWATCH ECLIPSE ANALOG INPUT / POWER 24 VDC –...
- Page 9 NOTE 1 JUNCTION BOXES MUST BE ELECTRICALLY CONNECTED TO EARTH GROUND. NOTE 2 THE TOTAL LOOP RESISTANCE = 250 OHMS MINIMUM, 440 OHMS MAXIMUM. B2689 Figure 6—PIRECL Detector Wired to UD20 (Non-Isolated 4-20 mA Output, Sourcing, 4-Wire) POWER SUPPLY PIRECL...
- Page 10 NOTE 1 JUNCTION BOXES MUST BE ELECTRICALLY CONNECTED TO EARTH GROUND. NOTE 2 THE TOTAL LOOP RESISTANCE = 250 OHMS MINIMUM, 440 OHMS MAXIMUM. B2691 Figure 8—PIRECL Detector Wired to UD20 (Isolated 4-20 mA Output, Sourcing, 4-Wire) NON-HAZARDOUS LOCATION CLASS I, DIV. 2 HAZARDOUS LOCATION...
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Page 11: Calibration
The yellow LED on the gas detector and The UD20 allows the operator to adjust the the digital display on the UD20 are used to inform the calibration gas concentration within the range of operator of the progress of the calibration procedure, 30 to 90% full scale. -
Page 12: Calibration Procedure
B. Initiate calibration via the magnetic switches on NOTE the UD20. Select Main Menu > Device Cal > To ensure reliable protection, it is important to Calibration > Execute. check and calibrate the detection system on a regularly scheduled basis. -
Page 13: Input Trim
INpUT TRIm WIRING TERMINALS— Terminals can handle wire sized from 22 to 14 AWG. The input current loop of the UD20 is trimmed at the factory. However, it can also be trimmed in the field CONDUIT ENTRIES— using the following automated process. - Page 14 6.48 (16.5) (11.9) 3.46 (8.8) (13.2) 5.86 (14.9) 11.28 (28.7) R0.175 A2442 Figure 12—Dimensions of UD20 with GT3000 in Inches (Centimeters) 95-8620...
- Page 15 UD20 CERTIFICATIONS— 5.86 (14.9) Class I, Div. 1, Groups B, C & D; Class I, Div. 2, Groups B, C & D (T4); (13.2) Class I, Zone 1/2 AEx d IIC T6; (6.9) Class II/III, Div. 1/2, Groups E, F & G.
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Page 16: Device Repair And Return
(if used) must be ordered separately. Identification (RMI) number can be assigned. A written statement describing the malfunction must Refer to the UD20 Model Matrix for ordering details. accompany the returned device or component to assist and expedite finding the root cause of the failure. -
Page 17: With Gt3000
AppenDix A HART COmmUNICATION – UD20 wITH gT3000 menU strUctUre This section displays the menu trees for the UD20 connected to the GT3000. The menu tree shows the primary commands and options available when using menu selections. 95-8620... - Page 18 95-8620...
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Page 19: With Pirecl
AppenDix b HART COmmUNICATION – UD20 wITH pIRECl menU strUctUre This section displays the menu trees for the UD20 connected to the PIRECL. The menu tree shows the primary commands and options available when using menu selections. 95-8620... - Page 20 95-8620...
- Page 21 95-8620 FlexSonic ® Acoustic X3301 Multispectrum PointWatch Eclipse ® FlexVu ® Universal Display Eagle Quantum Leak Detector IR Flame Detector Combustible Gas Detector with GT3000 Toxic Gas Detector Premier ® Safety System Corporate Office Phone: 952.946.6491 All trademarks are the property of their respective owners. ©...
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