Pyromation Series 642 - 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: