Hanna Instruments HI 720 Instruction Manual page 11

Setup Item Description
Other Parameters
C.70 Hold mode end delay 00 to 99 seconds
C.80 On/Off control
action delay (note 26)
OUTPUT
Relays
O.01 Relay 1 mode
(see notes 16, 17)
O.02 Relay 2 mode
(see notes 16, 17)
O.03 Relay 3 mode
(see notes 12, 16)
O.04 Relay 4 mode
(see notes 12, 16)
O.05 Hold digital output
Analog Output 1
O.10 Analog output 1
mode (notes 1, 17)
O.11 Analog output 1
type
O.12 Analog output 1
minimum value
(O_VARMIN1)
20
Valid Values Default
00 sec
00:00 to 30:00 min. 00:00 min
Disabled, Control-
Control-setpoint 1, setpoint 1
Control-setpoint 2,
Simple cleaning,
Hold mode
Disabled, Control-
Control-setpoint 1, setpoint 2
Control-setpoint 2,
Simple cleaning,
Hold mode
Disabled, Disabled
Simple cleaning,
Advanced cleaning,
Hold mode
Disabled, Disabled
Simple cleaning,
Advanced cleaning,
Hold mode
Disabled or Hold mode
Hold mode
Recorder or Recorder
Control-setpoint 1
0-20 mA or 4-20 mA
4-20 mA
0 to f.s. 0 μS/cm
(O_VARMIN1 ≤
O_VARMAX1 -5% f.s. for
O_VARMAX1, O_VARMIN1
≤ O_HOLD1 ≤ O_VARMAX1)
Setup Item Description
Analog Output 1
O.13 Analog output 1
maximum value
(O_VARMAX1)
O.14 Analog output 1
hold mode (note 13)
O.15 Analog output 1
hold mode value
(O_HOLD1)
Analog Output 2
O.20 Analog output 2
mode (notes 1, 17)
O.21 Analog output 2
type
O.22 Analog output 2
minimum value
(O_VARMIN2)
O.23 Analog output 2
maximum value
(O_VARMAX2)
O.24 Analog output 2
hold mode (note 13)
O.25 Analog output 2
hold mode value
(O_HOLD2)
Valid Values Default
0 to f.s. 1999 μS/cm
(O_VARMIN1 ≤
O_VARMAX1 -5% f.s. for
O_VARMAX1, O_VARMIN1
≤ O_HOLD1 ≤ O_VARMAX1)
User selected value, Previous value
Previous value
0 to f.s. 1000 μS/cm
(it must be within the
O_VARMIN1 to
O_VARMAX1 interval)
Recorder (temperature), Recorder
Control-setpoint 2
(conductivity/concentration
/temperature)
0-20 mA or 4-20 mA
4-20 mA
-30.0 to 130.0°C 0.0°C
(O_VARMIN2 ≤
O_VARMAX2 -10°C,
O_VARMIN2 ≤ O_HOLD2
≤ O_VARMAX2)
-30.0 to 130.0°C 100.0°C
(O_VARMIN2 ≤
O_VARMAX2 -10°C,
O_VARMIN2 ≤ O_HOLD2
≤ O_VARMAX2)
User selected value, Previous value
Previous value
-30.0 to 130.0°C 25.0°C
(it must be within the
O_VARMIN2 to
O_VARMAX2 interval)
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