Instruction manual

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MODEL XMT-P pH/ORP SECTION 1.0
DESCRIPTION AND SPECIFICATIONS
pH/ORP SENSOR DIAGNOSTIC CAPABILITY
320B Glass and Reference
330B Glass and Reference
320HP-58 Glass only
328A Glass only
370 Glass only
371 Glass only
372 Glass only
381 pHE-31-41-52 Glass only
381+ Glass and Reference
385-08-53 Glass only
385+ Glass and Reference
389-02-54 / 389VP-54 Glass only
396-54-62 / 396VP Glass only
396P-55 / 396PVP-55 Glass and Reference
396R / 396RVP-54 Glass and Reference
397-54-62 Glass only
398-54-62 / 398VP-54 Glass only
398R-54-62 / 398RVP-54 Glass and Reference
399-09-62 / 399VP-09 Glass only
399-10 / 399-14 Glass only
399-33 none
Hx338 Glass only
Hx348 Glass only
TF396 none
SENSOR COMPATIBILITY CHART
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1.2.2 FUNCTIONAL SPECIFICATIONS
pH Range: 0 to 14
ORP
Range: -1400 to +1400mV
Calibrations/standardization: The automatic buffer
recognition uses stored buffer values and their temper-
ature curves for the most common buffer standards
available worldwide. The transmitter also performs a
stabilization check on the sensor in each buffer.
A manual two-point calibration is made by immersing
the sensor in two different buffer solutions and entering
the pH values. The microprocessor automatically calcu-
lates the slope which is used for self-diagnostics. An
error message will be displayed if the pH sensor is
faulty. This slope can be read on the display and/or
manually adjusted if desired.
An on-line one-point process standardization is accom-
plished by entering the pH or ORP value of a grab
sample.
Preamplifier Location: A preamplifier must be used to
convert the high impedance pH electrode signal to a low
impedance signal for transmitter use. The integral pre-
amplifier of the Model Xmt-P may be used when the
sensor to transmitter distance is less than 15 ft (4.5 m).
Locate the preamplifier in the sensor or junction box for
longer distances.
Automatic Temperature Compensation: External 3-wire
Pt100 RTD or Pt1000 RTD located in the sensor, compen-
sates the pH reading for temperature fluctuations.
Compensation covers the range -15 to 130°C (5 to 270°F).
Manual temperature compensation is also selectable.
Accuracy: ±1.4 mV @ 25°C ±0.01 pH
Repeatability: ±1 mV @ 25°C ± 0.01 pH
Diagnostics: The internal diagnostics can detect:
Calibration Error Sensor Failure
High Temperature Warning CPU Failure
Low Temperature Warning Input Warning
ROM Failure Glass Warning
Glass Failure Reference Warning
Reference Failure
Once one of the above is diagnosed, the display will
show a message describing the problem.
DIGITAL COMMUNICATIONS:
HART (pH): PV assigned to pH. SV, TV, and 4V
assignable to pH, temperature, mV, glass imped-
ance, reference impedance, or RTD resistance.
HART (ORP): PV assigned to ORP. SV, TV, and 4V
assignable to ORP, temperature, reference imped-
ance, or RTD resistance.
Fieldbus (pH): Four AI blocks assigned to pH, tem-
perature, reference impedance, and glass imped-
ance.
Fieldbus (ORP): Three AI blocks assigned to ORP,
temperature, and reference impedance.
Fieldbus (pH and ORP): Execution time 75 msec.
One PID block; execution time 150 msec. Device
type 4085. Device revision 1. Certified to ITK 4.5.