Hanna Instruments HI 504 - Manual (Page 4)

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• Calibration and Setup procedures are password protected.
• Calibration: pH calibration at 2 points with two possible sets
of buffers (either 7.01 - 4.01 - 10.01 or 6.86 - 4.01 - 9.18),
or at 1 point with user-selectable value.
• Temperature compensation of the HANNA standard buffers.
• GLP features: old probe check, dead probe check, calibra-
tion time-out, last calibration data internally recorded (non-
volatile EEPROM memory): calibration date and time, pH
offset, pH slope, number of calibration points and corre-
spondent pH values.
• Solution compensation of the pH reading.
• Manual temperature setting when the temperature probe is
not inserted or temperature is out of range.
• Input: pH/ORP electrode with BNC connector.
• Input: pH/ORP/Temperature Digital Transmitter (HI
504910) which can be connected up to 1.2 km (0.75
miles) far away.
• Output (0-20 or 4-20 mA): one analog output for record-
ing of pH/ORP or controlling (only for models with PID).
• RS485 communication with Short Messaging Service (SMS)
for GSM phones.
• RS485 communication with analog modem for remote con-
nection with PC.
• Data logging: 6000 samples pH/°C or ORP downloadable
through RS485 and HI 92500 application software.
• Real time clock.
OPTIONAL FEATURES (depending on model)
• LEDs: four yellow LEDs are provided for signaling the ener-
gizing of relay 1, relay 2 (optional), relay 3 (optional) and
relay 4 (optional).
• Relays: 1, 2 or 4 output relays. The relays LEDs are switched
ON whenever the correspondent relay is energized (NO
and COM connected).
• Advanced Cleaning is provided through two cleaning commands
and variety of trigger events (relays 3 and 4 only).
• Output (0-20 or 4-20 mA): second independent analog
output for recording of temperature or controlling (only for
models with PID).
• PID control.
PRELIMINARY EXAMINATION
Remove the instrument from the packing material and exam-
ine it carefully to make sure that no damage has occurred
during shipping. If there is any noticeable damage, notify
your Dealer or the nearest Hanna Customer Service Center
immediately.
Note Save all packing materials until you are sure that the instru-
ment functions correctly. Any damaged or defective items must
be returned in their original packing materials together with
the supplied accessories.
GENERAL DESCRIPTION
The product is a real time microprocessor-based pH/ORP
controller. It provides accurate measurements, flexible
control capabilities and dual alarm signals.
The system is composed of a case inside which the signal
conversion circuitry, the microprocessor circuitry and the output
power drivers are contained.
MAIN FEATURES
• Configurations: for measure and control of pH or ORP, with
two separate sets of control settings. Thus no loss of settings
occurs when changing from pH to ORP and vice versa.
• Display: large LCD with 4 ½ 17 mm digits and 3 ½ 10 mm
digits.
• LEDs: a green LED (alarm relay) and a red LED for signaling
the device status.
• Alarm relay: one output relay for alarm condition (fail safe
mode: COM and NC are connected).
• Daily programmable control timing.
• Diagnostic features.
• pH/ORP probe check.
• Temperature sensor (Pt100 or Pt1000 type) with automatic
recognition and damage test.
• Hold management, including hold digital input to enter
hold mode with an external trigger.
• Logging of the last 100 error, configuration, calibration and
cleaning events.