HND-R106
HND-R106 K09/0422
page 5
5. Operating Principle
The KOBOLD hand-held pH, Redox and temperature measuring instruments of
the HND-R106 model are compact and universally applicable measuring units for
electrodes with BNC plug connection. An extensive selection of electrodes makes
it possible to use the HND-R106 in almost all application areas. The KOBOLD
HND-R105 measuring unit offers functions like minimum/maximum value
memory, hold function, auto off function and automatic temperature
compensation. In addition to pH, Redox and temperature measurement, the
device can display the rH value. This is calculated from the measured Redox-
value and the previously measured or manually entered pH-value.
6. Electrical Connection and Maintenance Advice
Treat device and sensor carefully. Use only in accordance with above
specification (do not throw, hit against etc.). Protect plug and socket from soiling.
6.1 Mains operation
Attention: When using a power supply device please note that
operating voltage has to be 10.5 to 12 V
DC
. Do not apply
overvoltage!! Cheap 12 V-power supply devices often have
excessive no-load voltage. We, therefore, recommend using
regulated voltage power supply devices. Trouble-free operation is
guaranteed by our power supply HND-Z002. Prior to connecting
the plug power supply device with the mains supply make sure
that the operating voltage stated at the power supply device is
identical to the mains voltage.
6.2 When to replace battery
If
and ´bAt´ are shown in the lower display the battery has been used up and
needs to be replaced. The device will, however, operate correctly for a certain
time. If ´bAt´ is shown in the upper display the voltage is too low to operate the
device; the battery has been completely used up.
Please note: The battery has to be taken out, when storing
device above 50 °C. We recommend taking out battery if device
is not used for a longer period of time.
