7.3 Measurement menu
7.3.1 Instrument configuration
7.3.1.1 Continuous mode description
Continuous mode is typically used for process measurement.
Continuous mode cycle
• Every 2 sec. measurements are refreshed on the display
• The relays and the analog outputs are updated
• Measurements are continuously stored in memory (volatile and non volatile memory) according to
individual settings
7.3.1.2 Continuous mode selection
1. Select Config. instrument from the Measurement menu:
Option Description
Measurement mode Measurement mode is locked on Continuous
for on line process.
Pressure Select the barometric pressure units.
Temperature Select the temperature units.
7.3.2 Measurement configuration
1. EC sensor
Option Description
Membrane Sensor’s membrane number selection.
Medium Liquid or gas phase.
Gas unit type Partial, Fraction, Dissolved.
Gas unit The list of available units depends on unit type selected above.
Note: This is the gas concentration measured by the EC sensor. When a composite unit
is selected (e.g. ppm » ppb) the unit will change depending on the range of the value to
display.
Liquid When medium is liquid, select water or a liquid with a different solubility (if available).
Display
resolution:
Maximum resolution depends on gas, membrane and unit. A maximum of 5 digits can be
displayed. Decimals can be limited to 0, 1, 2 or 3 decimals for easier reading. That does
not affect the actual resolution of data measured and stored, but only the data displayed.
Thermal cutoff: To protect the sensor, the thermal cutoff function allows for setting a sample high
temperature limit. If exceeded (during a Cleaning In Place cycle for example) the
electrical signal to the sensor is cut off, the measurement session is suspended and the
system displays a HOT alarm message. The system resumes when temperature drops
to 90% of the specified cutoff temperature.
• Thermal cut off options: Disabled / enabled.
• Thermal cut off temperature: To be set according to conditions.
2. TC sensor
The measurement configuration for a TC sensor is the same as for an EC sensor with the
addition of one extra selection criteria:
• Purge gas: From the drop-down list, select the purge gas being used for the TC sensor.
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