Michell Instruments XZR-400-BM, Руководство пользователя

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XZR400 Series User’s Manual
22 97472 Issue 3, August 2018
INSTALLATION
2.9.6 Signal Processing Path
The values of oxygen concentration and fl ow passing through the sensor are displayed
continuously.
On speci fi c screen pages the following control parameters are displayed:
• Oven temperature
• Ambient temperature (corresponding to the thermocouple junction
temperature)
• O
2
concentration
• MSRS sensor voltage
• Barometric pressure (standard) or process pressure (optional)
• Flow passing through the sensor
Analog Outputs:
The analog output can be con fi gured to represent the measured oxygen parameters and
is provided as a 2-wire signal. It can be set-up as a current loop signal 4-20 mA. The
con
fi guration of the output can be set via the
Main Menu
.
The analog output is proportional to user-defined scale. The connection is inside the
enclosure, behind the removable panel on the front of the unit. An optional second
4-20 mA output is available.
2.9.7 Alarm Outputs
Standard Alarms:
• general fault alarm
• 2 concentration alarms with user-con fi gurable high/low thresholds and
hysteresis
Two alarm relays are provided. They are connected to the instrument via the terminal
block inside the XZR400A2 Analyzer.
Under the
Main Menu
, the two concentration alarms can be set-up to operate when a
pre-set parameter threshold level is exceeded (refer to Section 3.6.2). The direction of
the activation, as well as the hysteresis can be con fi gured.
The fault alarm is a non-con fi gurable alarm which continuously monitors the status of
the analyzer. During normal operating conditions the alarm is off. The alarm will be
triggered and both relay contacts will open if:
• the oven temperature is low
• the thermocouple breaks
• a fault with the memory occurs
Optional Alarm:
• an optional fl ow alarm is available