Omega PHCN-961, Руководство пользователя, Страница: 9 / 46

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2 PRODUCT DESCRIPTION
2.1 DESCRIPTION OF INSTRUMENT SPECIALITY:
OMEGA ENGINEERING
. pH / ORP transmitters are used to measure pH or ORP
and temperature value.
This transmitter has many user-friendly and safety features which include:
• Menu-driven programs that are easy to set-up.
• IP65 enclosure.
• Built-in memory backup to ensure that setup parameter and calibration information are
not erased if power is lost.
• Can separately set process temperature (TST1) and Calibration temperature (TST2)
manually. If the temperature sensor fails, under automatic temperature compensation
mode, instrument will automatically switch to process temperature (TST1) of manual
temperature compensation to compensate.
• pH measured value can make offset adjustment (adjusting scope
±
2PH) so that users can
calibrate online.
• Various choice of electric current output. 0/4-20mA Output range can be user
programmed.
• Two sets of relay contacts, users can choose high-low meta control independently.
• Separately adjustable high and low set point hysteresis (dead bands) prevent oscillating of
relays around the set points.
• Large dual display LCD for easy reading with clear multiple annunciators, alarm status
and operational message annunciators.
• Can set calibration time. Instrument will automatically appear “CAL” at regular time to
call person to alert that a calibration is needed.
• Glass electrode and Metal antimony electrode can be chosen and be used under different
industrial situations.
• During calibrating and setting, hold function freezes output current (0/4 20ma) and releases
control relays.
• Ultraviolet rays resistant, LCE of blue back light (LCD=liquid crystal display)
• RS-485. Maximum 100 instruments can be connected.