9
General
Measuring Channels
Only use accessories provided with the
HDM97
. Use of other devices may damage the instrument and
will void the warranty.
Conductivity/Temperature Probe
The conductivity/temperature transducer is a quadropole design for greater accuracy and longevity than other
designs.
Standard precision pressure transducer
This pressure transducer is watertight. However it is recommended to keep fluids away from the sensor
because residues like salt can falsify measurement results. In this case the sensor needs to be flushed with
deionized water.
High precision pressure transducer
To avoid damage or inaccurate measurement, ensure that no fluids enter the instrument. We recommend the
use of a Transducer Protector for this purpose. Never flush the sensor.
Pressure drop measurement
This is not a real channel, it is a function for measuring pressure loss in systems for a specified time.
Timer
This is not a real channel, it is a function to help performing anything where time is a crucial element.
pH
The input connector is designed exclusively for pH electrodes. It is optimized for glass electrode single-rod
measuring cells with a slope of
Δ
E
of 59mV at 20°C
. Its absolute maximum allowable input voltage span
extends from -3 Volts to +3 Volts with respect to BNC Shield. Applying any voltage beyond these
boundaries will possibly destroy the instrument.
Flow
This connection is designed to be used with the HDU FLOW97 probe only. Do not connect any other
devices to this port even when the connector may fit.