15
Manual Operation Test
This option gives the user the opportunity to manually initiate an individual test for each relay, the analog output and the sensor
response to gas. From normal operation mode press the Next button 3 times to get to the Test Mode (tSt). Press the Enter button
once to get into the Test Menu. Press the Next button to scroll through the four test options and press Enter to initiate the selected
test. Note that if the relay or 4–20 mA output has been disabled, the test selection will not be displayed in the test menu.
Art - Alarm Relay Test, 10 seconds
Frt - Fan Relay Test, 60 seconds
42t - 420 loop test, 25 seconds
MAINTENANCE
The MRS-485 does not require regular maintenance. All maintenance and repair of products manufactured by Macurco are to be
performed at the appropriate Macurco manufacturing facility. Macurco does not sanction any third-party repair facilities.
Do not disassemble unit or attempt to repair or modify any component of this instrument. This instrument contains no user
serviceable parts, and substitution of components may impair product performance and result in sickness or death.
CAUTION
Avoid the use of harsh cleaning materials, abrasives and other organic solvents. Such materials may permanently scratch the
surfaces and damage the LEDs labels or instrument housing.
Cleaning
Cleaning of the external surfaces is best carried out using a damp cloth with a mild detergent or soap. Use a vacuum cleaner with
soft brush to remove dust or contamination. Do not blow out the sensor with compressed air.
! WARNING
