Delta OHM HD2109.1, Operating Manual

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HD2109
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V2.4
HD2109.1
1. 8-pole DIN45326 connector, input for dissolved oxygen and temperature combined probes,
for Pt100 SICRAM temperature probes and direct 4-wire Pt100 probes complete with TP47
module.
2. External auxiliary power supply connector input (positive at centre).
3. Battery symbol: displays the battery charge level.
4. Function indicators.
5. Secondary display line.
6. CAL/ key: during normal operation starts the dissolved oxygen probe calibration; in the
menu, increases the current value.
7. FUNC/ENTER key: during normal operation displays the maximum (MAX), the minimum
(MIN) and the average (AVG) of current measurements; in the menu, confirms the current
selection. This updates the display measurement when the
Auto-Hold function is enabled.
8. REL/ key: enables the relative measurement (displays the difference between the current
value and the logged value when the key is pressed); in the menu, decreases the current
value.
9. SERIAL key: starts and ends the data transfer to the serial communication port.
10. MENU key: allows access to and exit from the menu.
11. mg/l-%-ESC key: cyclically changes the main variable measurement between:
•
dissolved oxygen concentration (in mg/l),
•
saturation index (in %),
•
barometric pressure (in mbar).
In the menu, cancels the operation in progress without making changes.
12. °C/°F key: when the probe is not connected, allows manual modification of the temperature.
When a probe with temperature sensor is connected, pressing this key twice changes the unit
of measurement from degrees Celsius to Fahrenheit.
13. ON-OFF/AUTO-OFF key: turns the instrument on and off; when pressed together with the
CAL key, disables the automatic turn off.
14. MAX, MIN and AVG symbols.
15. Main display line.
16. Line for symbols and comments.
17. 8-pole MiniDin connector for RS232C. For the connection to PC (with cable HD2110CSNM
or C206) or printer (with cable HD2110CSNM).