Description And Specifications; 1.1 Features And Applications - Emerson Rosemount 1054B Instruction Manual

MODEL 1054B pH/ORP

DESCRIPTION AND SPECIFICATIONS

•
pH ELECTRODE DIAGNOSTICS warn user of the need for calibration or electrode replace-
ment.
•
AUTOMATIC BUFFER RECOGNITION with stored buffer-temperature curves
(1054B pH only).
•
NEMA 4X (IP65) WEATHERPROOF CORROSION-RESISTANT ENCLOSURE.
•
NO BATTERY BACK-UP REQUIRED. Non-volatile EEPROM memory.
•
SPECIFIC PROCESS TEMPERATURE COMPENSATION for pH changes due to tempera-
ture (1054B pH only).

1.1 FEATURES AND APPLICATIONS

The Model 1054B Microprocessor Analyzers, with the
appropriate sensor, are designed to continuously mea-
sure and control pH, ORP, conductivity, percent concen-
tration, ratio, resistivity, ozone, dissolved oxygen and total
free chlorine in industrial and municipal processes.
The Model 1054B is housed in a NEMA 4X (IP65)
weatherproof corrosion-resistant, flame retardant
enclosure suitable for panel, pipe or wall mounting. All
functions are accessed through the front panel mem-
brane keyboard which features tactile feedback.
Measurement data may be read at any time; however,
settings may be protected against accidental or unau-
thorized changes by a user selectable security code.
The display indicates the measured value in engineer-
ing units as well as temperature, alarm status, hold
output and fault conditions.
The analyzer transmits an isolated current output which
is continuously expandable over the measurement
range for either direct or reverse action. A hold output
function is available for allowing manual control during
routine sensor maintenance. During hold mode the out-
put will be at a preset or last process value.
In the event of one of the following conditions, the
analyzer will drive the output to a preset value in addi-
tion to displaying a fault code. The Model 1054B pH's
continuous self diagnostics alert the user to the follow-
ing:
• Broken or cracked electrode
• Worn out or non-immersed
electrode
• Calibration or coated elec-
trode warning
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SECTION 1.0
• Faulty slope value (off-line
only)
• Open wiring
• Analyzer electronics failure
• Faulty temperature element or
temperature value
DESCRIPTION AND SPECIFICATIONS
With automatic buffer recognition, the analyzer recog-
nizes the buffers, then calculates the electrode slope
using stored pH-temperature curves for ten common
buffers.
Dual alarms are a standard feature on the Model
1054B and are programmable for either high or low
operation. Alarm 2 may be programmed to activate in
event of a failure detected by the continuous diagnos-
tics. Both alarms feature independent setpoints,
adjustable hysteresis and time delay action. A dedicat-
ed interval timer with relay is also provided for chemical
or ultrasonic cleaning.
The 1054B pH automatically compensates the pH
reading for process temperature changes. Automatic
or manual temperature compensation is keyboard
selectable. Additional process temperature compen-
sation is available.
The Analyzer includes a 0.7 inch digital display avail-
able in LCD or LED format.
The Model 1054B can display the process tempera-
ture in °F or °C.
SECTION 1.0
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