Pyromation Series 642 User Manual
Page 22
Commissioning
Series 642
22
Pyromation, Inc.
Function group SAFETY/MAINTENANCE
Availability in TransComm Light, HART
®
communicator DXR375 (symbol
7
)
TransComm Light
7
Fault condition
Input of the output signal on sensor rupture or short circuit.
Input:
• max (
≥ 21.0 mA)
• min (
≤ 3.6 mA)
+
+
Error current
specification
Input only possible if fault condition = max
Input: 21.6 to 23 mA
21.7 mA
+
+
Alarm hysteresis
Transient alarms are suppressed at the analog output (e.g. caused by electrostatic
discharge).
Input:
• 0 s
• 2 s
• 5 s
In the time entered, the last measured value before the alarm is output. If the error is still
present after this period, an alarm is signalled.
+
+
Alarm ambient
temperature
An alarm for overshooting/undershooting of permitted ambient temperature is
deactivated here.
Input:
• on
• off
If the ambient temperature alarm is deactivated then the unit will not go into alarm but
will transmit a warning. Change is the responsibility of the user.
+
+
Corrosion detection
Sensor connection cable corrosion can lead to false measured value readings. Therefore
our unit offers the possibility to recognise any corrosion before the measured values are
affected. (see chapter 9.2.1).
There are 2 different steps selectable dependent on the application requirements:
• off (warning output just before reaching the alarm set point. This allows for
preventative maintenance/trouble-shooting to be done.)
• on (no warning, immediate alarm)
+
+
Alarm for
undershooting/
overshooting
Input:
• OFF
If the measuring range is undershot or overshot, the output signal is temperature-linear
up to 3.8 mA or 20.5 mA and remains at these values (as per NAMUR NE43).
• ON
An error is signalled if the measured temperature corresponds to an output value < 3.8
mA or > 20.5 mA, (see 'Fault condition').
+
+
Mains filter
Selection of mains filter
•
50 Hz
•
60 Hz
+
+
Function group DISPLAY
Availability in TransComm Light, HART
®
communicator DXR375 (symbol
7
)
TransComm Light
7
DISPLAY
Activating the values to be shown on the device display: