7
6
REAR PANEL
1. 6-pin RS485 terminal (
HI 700222
and
HI 710222
only)
2. Analog Output (
HI 700221
and
HI 710221
only)
3. Power Supply
4. Alarm Terminal
5. Contact 2 - Second Dosing Terminal
6. Timer
7. Hold
8. Contact 1 - First Dosing Terminal
9. Pt 100 Temperature Sensor connector
10. EC/TDS probe connector
11. Power supply output for external transmitter
12. 4-20 mA input from external transmitter
Unplug the meter before any electrical connection.
MECHANICAL DIMENSIONS
FRONT VIEW
SIDE VIEW
FUNCTIONAL DESCRIPTION
FRONT PANEL
1. Liquid Crystal Display
2. SETUP key
enters setup mode
3. CFM key
confirms current choice (and skips to the next item)
4. CAL key
initiates and exits calibration mode
5.
key
increases the blinking digit/letter by one when selecting a
parameter. Advances forward while in last calibration data
viewing mode. Increases the temperature setting when
temperature probe is not inserted
6. CAL DATA key
last calibration data viewing (enters and exits)
7.
key
decreases the blinking digit/letter by one when selecting a
parameter. Reverts backward while in last calibration data
viewing mode. Decreases the temperature setting when
temperature probe is not inserted
8. LCD key
exits from setup and reverts back to normal mode (in idle
or control phases with the measurement on the display).
During EC/TDS calibration, it alternates EC/TDS buffer
value and current cell constant on the display. In
HI 710
models only, it switches between EC and TDS reading
9.
key
moves to the next digit/letter (circular solution) when se-
lecting a parameter. Same as
key during last calibration
data viewing mode
10. LEDs
