Completing Setup - Emerson MRLDS-250 Installation And Operation Manual

Parameter
Diagnostics Menu
Parameter 18 provides access to
the self diagnostic information.
The LED display shows DIAG
until the Enter button is pressed.
Use the UP and DOWN buttons
to scroll through the list of
diagnostic attributes.
A.-01 Current fault condition
A.-02 Last fault
A.-03 Days in service
A.-04 Days since last adjust/test
A.-05-A.-07 Factory Use Only
A.-08 Detector temperature 
in °C
A.-09 Temperature rate of
change
A.-10-A.-17 Factory Use Only
To aid in troubleshooting, the
operator may choose to reset the
gas detector to its default state
by holding both the UP and
DOWN buttons for 5 seconds
while in the Diagnostics Menu.
All settings, including the alarm
setpoint, gas adjustments, the
selected gas curve, calibration
data, the Modbus address, etc.
revert to specific default values
after a reset.
IMPORTANT: Calibrations on
either gas-specific or broadband
models are lost after a reset. This
returns the gas detector to an
uncalibrated condition. See
parameter P.-17 for information
on how to recalibrate the gas
detector.
See Section 9, Replacement
Parts and Accessories for a
complete list of codes and
details on the reset option.
Table 5-2 - Parameter Numbers, Names, and
Descriptions

Completing Setup

Description Parameter
Response Filtering
This parameter is used to turn
filtered output ON (01) or OFF
(00).
The default setting is ON (01).
The Modbus and analog output
are filtered so that responses
below 75 ppm are squelched. If
the display mode (P.-09) is set to
ON (01) the display shows 0 for
any signal level below 75 ppm.
Some installations may wish to
monitor the small analog output
changes that may be created by
the detector environment.
Turning filtering OFF (00)
allows these small variations
around the minimum analog
output (for example, 4 mA, 1V,
etc.) to be transmitted via
Modbus and the analog output
terminals.
NOTE: The detector display is
OFF when filtering is OFF 
(P.-09 is disabled).
NOTE: Whenever filtering is
OFF the detector display will
turn ON for 10 minutes if the
detector is re-zeroed (see
Section 4.3., Perform a Manual
Zero). This is intended to aid
maintenance testing. The analog
outputs continue to transmit the
full, unfiltered range, and the
alarm setpoint remains active.
NOTE: If filtering is turned off
(00), Analog Output Scaling 
(P.-16) should be adjusted to 500
ppm.
Table 5-2 - Parameter Numbers, Names, and
Descriptions
5.3. Completing Setup
To complete the setup after all parameters are set as
needed, simply press and hold the information
f
button or 5 seconds to exit the Parameter list:
detector is now actively monitoring its surroundings.
NOTE: If no buttons are pressed for two
minutes, the MRLDS-250 exits setup
mode automatically.
Configure the Gas Detector • 19
Description
The gas