18
EM2
Maintenance
Start-up Test
After setup and programming is complete, it is
recommended to perform a functionality test of the
unit. Refer to sensor manual for proper warm-up time
of sensor prior to any sensor test.
Because sensors are normally located at a distance
from the main unit, the test time required and
accuracy of the response checks will be improved if
two people perform the start-up procedure and use
radio contact.
Start-Up Test:
1) One person exposes the sensor to calibration gas or
test gas.
2) The second person stays at the control unit to
determine that when exposed to the gas, the alarm
functions as intended.
Signal Levels
The EM2 is designed to over-range approximately
8% up to 21.3 mA. Monitoring equipment must be
configured to indicate a fault if the analog input signal
is below 1 mA. All analog input signals over 20 mA
must be considered high gas concentrations.
Start-Up
All gas detection systems should be calibrated with
certified calibration gas once every six months. At this
interval, all alarm functions and outputs should be
tested, verified and documented.
If sensor span or zero cannot be adjusted, refer to the
sensor manual. The sensor may be approaching its end
of life and may need to be replaced. Keep an operation
log of all maintenance, calibrations and alarm events.
To clean the controller, use a mild cleaning solution
and soft cloth.
Always disconnect power before performing any wiring
at the controller.
Replacement parts:
EM2-24
(entrance monitor, 24Vdc)
EM2-120
(entrance monitor, 120Vac)
EM2-PS-KIT
(120Vac power supply kit with back-box)
EM2-PS
(120Vac power supply, 1.1A)
EM2-Latch
(set of two enclosure latches)
EM2-Key
(hinge lock key)
EM2-MP
(mounting plate, black, powder-coated
aluminum)
Summary of Contents for EM2 Series
Page 1: ...Installation and Operation Manual EM2 ENTRANCE MONITOR...
Page 22: ...22 EM2...
Page 23: ...23 EM2...
Page 24: ...ctiengineering com 866 394 5861 CT2 DOC1 1 20200109...