6
• Calibration and Setup procedures are password pro-
tected .
• 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 Instruments
Office standard buffers .
• GLP features: old probe check, dead probe check, cali-
bration time-out, last calibration data internally recorded
(nonvolatile EEPROM memory): calibration date and
time, pH offset, pH slope, number of calibration points
and correspondent 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
(
HI504910
) 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
connection with PC .
• Data logging: 6000 samples pH/°C or ORP download-
able through RS485 and HI92500 application software .
• Real time clock .
OPTIONAL FEATURES (depending on model)
• LEDs: four yellow LEDs are provided for signaling the
energizing 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 ener-
gized (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 .
