Sensor Calibration - Hach 29971-72 Benutzerhandbuch

Flush the system
When a series of analyses is complete, flush the system with warm water as follows:
1. Discard the content of the beverage package.
2. Fill the package with water.
3. Use the available gas pressure to flush the water through the system.

Sensor calibration

Refer to the indicating instrument and sensor documentation for the calibration requirements and
procedures for the sensor.
Optional devices and accessories
One or more of the optional items that follow are necessary based on the user application. Contact
your Hach representative for more information.
Model 29089—Regulator and filter
Refer to Install a regulator and filter (optional) on page 11.
Model 32301—Sensor cleaning and regeneration center
The model 32301 sensor cleaning and regeneration center is a multi-function device for
ORBISPHERE electrochemical (EC) sensors. Use model 32301 to:
• Clean the sensor electrodes.
• Examine the sensor for correct operation or to find a fault.
Model 32559—External temperature sensor
The model 32559 external temperature sensor is available for applications where the sample
temperature can continuously change. The external temperature sensor supplies a constant sample
temperature signal independently from the room temperature.
The temperature sensor is installed directly in the flow chamber. The temperature sensor is
connected with a cable with a LEMO-4 connector to a junction box that is installed at the rear of the
TC sensor.
Model 32605—Purge gas backup unit
The user must keep the indicating instrument always set to on to continuously apply purge gas to the
CO (or N ) sensor and prevent sensor damage, even when there is no CO (or N ) analysis. Use
2 2 2 2
the purge gas backup unit, model 32605, to set the indicating instrument to off without removing the
sensor from the flow chamber. The purge gas backup unit lets the user set the indicating instrument
to off.
Install the purge gas backup unit directly between the instrument and the sensor through the sensor
cable. The unit is energized by internal batteries. The internal batteries are automatically recharged
when the instrument is set to on. When the instrument is set to off, the purge backup unit continues
to purge the sensor for a maximum of 4 days.
Model 32816—Reciprocating shaker
In some beverage sampling applications, it is necessary to shake the beverage packages to
equilibrate the contents of the package.
If applicable, use the reciprocating shaker for a minimum of 3 minutes. The reciprocating shaker,
model 32816, operates at a frequency of 280 cycles/minute, with an amplitude of approximately 5 cm
(2 in).
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