Hanna Instruments HI 720 Instruction Manual

21, 40 41 Example: • Max. slope = 30 mS / 5 min = 6 mS/min • Time delay = Tx = approx. 7 minutes • Deviation = Tx * 6 = 42 mS • Ti = Tx / 0.4 = 17.5 min • Td = Tx * 0.4 = 2.8 min Alarm Relay During normal operation (no alarm condition) the alarm relay is energized, while durin…

2, 2 3 TABLE OF CONTENTS WARRANTY .....................................................................................................4 PRELIMINARY EXAMINATION ............................................................................5 MODEL IDENTIFICATION ..........................…

31, 60 61 the first HI 92500 software version compatible with the firmware, even if it may not be able to exploit all the features of the firmware, e.g. “34” for 3.4; CD is the first HI 92500 software version fully compatible with this firmware, e.g. “45” for 4.5. The HOP request pro…

16, 30 31 (17) If the relay 1 (or relay 2) mode is set to “Control-setpoint 1”, the analog output 1 can not be set to “Control-setpoint 1”, and vice versa. Similarly, if the relay 1 (or relay 2) mode is set to “Control-setpoint 2”, the analog output 2 can not be set to “Contr…

11, Hanna Instruments HI 720 20 21 Setup Item Description Valid Values Default Analog Output 1 O.13 Analog output 1 0 to f.s. 1999 μS/cm maximum value (O_VARMIN1 ≤ (O_VARMAX1) O_VARMAX1 -5% f.s. for O_VARMAX1, O_VARMIN1 ≤ O_HOLD1 ≤ O_VARMAX1) O.14 Analog output 1 User selected value, Previous value hold mode (note …