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5
HD2106.1
1.
8-pole DIN45326 connector, input for combined 4-ring or 2-ring conductivity/temperature
probes, for direct 4-wire Pt100 temperature probes and 2-wire Pt1000 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 conductivity 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 se-
lection. 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.
χ
-
Ω
-TDS/ESC
key: changes the main variable measurement between conductivity, resistivity,
total dissolved solids (TDS) and salinity. 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 the probe is connected, if this key is pressed twice, it changes the unit of temperature
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).
