Teledyne LXT-280 User Manual
Page 17

Dissolved Oxygen Transmitter
Installation
Teledyne Analytical Instruments
7
Figure 2-2: Intrinsically Safe Wiring Diagram
2.3 Wiring
2.3.1 Site Wiring
Two conduits should be run to the transmitter location, one for
the sensor and the other for the 24 VDC-power source. Proper methods
of terminating the conduit for hazardous locations should be reviewed
by your local plant safety engineer based on State and Federal
requirements.
2.3.2 Power Wiring
For power wiring, the LXT-280 transmitter requires a nominal 24-
VDC voltage source. With zero loop impedance, the minimum voltage
requirement is 14 VDC. The maximum voltage limit is 50 VDC.
Maximum loop impedance at 24 VDC is 450 ohms for the 4-20 mA
compliance. Impedance levels higher than 450 ohms will require
additional DC voltage.
Figure 2-3 illustrates the proper 24 VDC power wiring for the LXT-
280 transmitter. When connecting the power wires, it is important to
- 1220 - Multipoint flammable gas and vapor detection system (50 pages)
- 212R - Thermal conductivity analyzer (28 pages)
- 235 - Thermal conductivity analyzer (38 pages)
- 275R - Portable turbine generator purge gas analyzer (21 pages)
- 2000A-EU - General purpose thermal conductivity analyzer (86 pages)
- 2000XTC - Thermal conductivity analyzer (40 pages)
- 2010A - Split architecture thermal conductivity analyzer (110 pages)
- 2010B - Split architecture thermal conductivity analyzer (98 pages)
- 2020 - Explosion proof thermal conductivity analyzer (80 pages)
- 2120 - Trace Nitrogen in Argon Analyzer (66 pages)
- 2120XL - Trace Nitrogen Analyzer (85 pages)
- 2230R - Process Hydrogen Analyzer (26 pages)
- 2240 – Portable Handheld Hydrogen Leak Detector, 3rd generation (updated 1/31/11) (30 pages)
- 2240 - Portable Handheld Hydrogen Leak Detector, 3rd generation (revision 2/29/08) (40 pages)
- 2240 – Portable Handheld Hydrogen Leak Detector, 2nd generation (13 pages)
- 2750 - Portable turbine generator gas analzyer (40 pages)
- 300P - Percent oxygen analyzer (24 pages)
- 306WA - Analog trace oxygen analyzer (46 pages)
- 311 - Portable trace oxygen analyzer (19 pages)
- 311D - Portable trace oxygen analyzer with digital meter (18 pages)
- 311XL - Portable trace oxygen analyzer (18 pages)
- 316RA / RB / RAD / RBD - Oxygen analyzers (24 pages)
- 319R - Oxygen analyzer (23 pages)
- 320 Series - Portable oxygen detectors (24 pages)
- 326, 327 and 328 - Oxygen analyzers (45 pages)
- 329R - Oxygen analyzer (22 pages)
- 335 - Analog control room monitor for personnel safety (24 pages)
- 356WA - Analog trace oxygen analyzer (42 pages)
- 3000MA - Paramagnetic oxygen analyzer (63 pages)
- 3000MA - Paramagnetic oxygen analyzer Addendum (2 pages)
- 3000MB - Paramagnetic oxygen analyzer (59 pages)
- 3000PA - General purpose percent oxygen analyzer (69 pages)
- 3000PAEU - General purpose percent oxygen analyzer (78 pages)
- 3000PB - Bulkhead mount percent oxygen analyzer (82 pages)
- 3000TA - General purpose trace oxygen analyzer (75 pages)
- 3000TA-EU - General purpose trace oxygen analyzer (89 pages)
- 3000TA-XLEU - Trace oxygen analyzer (108 pages)
- 3000TB - Bulkhead mount trace oxygen analyzer (78 pages)
- 3000TB-XL - Trace oxygen analyzer (78 pages)
- 3000ZA - Trace oxygen analyzer (81 pages)
- 3000ZA-3X - Trace oxygen analyzer (72 pages)
- 3000ZA2G - Zirconium oxide analyzer (72 pages)
- 3000 Ultra Trace - PPB oxygen analyzer (72 pages)
- 3010MA - Paramagnetic oxygen analyzer, includes 0-100% range (88 pages)
- 3010MA – Paramagnetic oxygen analyzer, no 0-100% range – (superceded) (88 pages)