Diagnostic Attributes (P.-18); Resetting The Mrlds-250 To Default Values; Ttributes (P.-18) - Emerson MRLDS-250 Installation And Operation Manual

7.2. Diagnostic Attributes
(P.-18)
Use this option to review the built-in diagnostic
attributes. Access the parameter list (see Section 5,
Configure the Gas Detector) and select P.-18. Press
the Enter button to access the diagnostics, and then
use the UP or DOWN buttons to select each attribute.
The following information is available.
Attribute
Displays the current fault condition code
in hex format:
0000 = no faults are active
XXXX = HEX number
See for the HEX format cross reference.
Displays a hex format code that
corresponds to any faults that occurred
since the internal fault record was last
erased. See Table 7-1 for the HEX format
cross reference. The records may be
erased by pressing the ENTER button.
Displays the number of days that the
MRLDS-250 has been in service. The
value of this attribute rolls over after
9999.
Displays the elapsed time (in days) from
the last gas adjustment or test. This value
is automatically reset to 0000 after
completing a gas adjustment via Test
Mode P.-17. (Note that the new
adjustment is stored using the Enter
button.) The value may be reset to 0000
by pressing the ENTER button.
:
Reserved
Displays the sensor temperature in °C.
Table 7-2 Diagnostics Attributes
20 • MRLDS-250 Gas Detector Manual
Description
Attribute
Displays the sensor's approximate rate of
temperature change per half minute
interval (°C change over 30 seconds).
:
Reserved
Table 7-2 Diagnostics Attributes
7.3. Resetting the MRLDS-
250 to Default Values
The gas detector may be reset to its default state
(as shipped from the factory) if needed, to aid in
troubleshooting. All settings, including alarm
setpoint, gas adjustments, selected gas curve, and
others revert to the factory default condition. Before
performing this operation it is advisable to write down
all parameter settings for later reference so they can
be re-programmed.
Symptom
1 Access diagnostics menu P.-18.
2
Press and hold both the UP and DOWN
buttons for five (5) seconds. This will cause
the following to occur:
• All the LED segments will then light for
three (3) seconds.
• The gas detector resets to the default
settings.
• The gas detector beeper sounds for three
(3) seconds.
3
After three (3) seconds the user is returned
to the parameter list at parameter P.-18.
4 The gas detector may now be
re-programmed for further troubleshooting
if needed.
Table 7-3 Resetting MRLDS-250 to Default Values
Description
Description
026-1315 Rev 2 11-APR-2017