Teledyne LXT-230 manual Appendix A - Specifications

APPENDIX A - SPECIFICATIONS

MEASUREMENT RANGE

pH: 0.00 to 14.00, fully expandable and reversible, standard. -2.00 to 14.00 pH, optional.

ORP: +1000 to -1000 mV, fully expandable and reversible, standard.

OUTPUT 4-20 mA or 20-4 mA, linear and expandable. Up to a maximum of 3 outputs.

POWER REQUIREMENTS

(with zero loop impedance)

Recommended	24 vdc
Maximum	50 vdc
Minimum	13.5 vdc

MAXIMUM LOOP IMPEDANCE (@ 24 vdc)

525 ohms for 4-20 mA compliance on primary (channel 1) output; approximately 800 ohms on secondary outputs

OPERATING TEMPERATURE

-4°F to +158°F (-20°C to +70°C)

DISPLAY

Menu driven, 32 character alpha-numeric, Supertwist LCD. The main menu simultaneously displays (1) process identity (2) process value (and engineering units), (3) percent output, (4) temperature in °C or °F.

ENCLOSURE

NEMA 4X, weatherproof

SHIPPING WEIGHT

Standard LXT-230: 2 lbs (0.91 kgs)

ACCURACY

± 0.10% of full scale

LINEARITY

± 0.05% of full scale

SENSITIVITY

± 1.0 mV

STABILITY

± 0.2% per year @ 0°C to 70°C

RESPONSE TIME

1 second to reach 90% of the change.

REPEATABILITY

± 1.0 mV

TEMPERATURE COMPENSATION

pH: Automatic, -30°C to +140°C, RTD. Accuracy within ±0.1°C over a 0°C - 100°C span.

Specific pH compensation temperature correction) is available. Consult the factory.

ORP: Not used for compensation; however, temperature is displayed. Accuracy within ±0.1°C over a 0°C-100°C span.

50/60 Hz NOISE REJECTION Greater than 70 db

INPUT/OUTPUT ISOLATION

Maximum 300 volts between process input and any 4-20 mA output (single and multiple channel outputs). No isolation between inputs on multiple channel units.

CALIBRATION

Auto Buffer Calibration

Allows the definition of two buffer points, saved in memory, during the initial start-up. This will allow subsequent standardize and span buffer calibrations with only 2 keystrokes.

Back-to-Factory Calibration (Factory

Restart)

With 2 keystrokes, allows the technician to return the transmitter to a zero electrode offset (asymmetry potential) and to an ideal Nernstian slope (1.000 mV per ORP unit).

Model LXT-230 Instruction Manual / 21