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Model TS420
5
3.0 Installation
3.1 Receipt of Equipment
All equipment shipped by General Monitors is packed in shock absorbing containers, which
provide considerable protection against physical damage. The contents should be carefully
removed and checked against the packing slip. If any damage has occurred or if there is any
discrepancy in the order, notify General Monitors as soon as possible. All subsequent
correspondence with General Monitors must specify the equipment part number and serial
number.
Each TS420 is thoroughly checked by the factory. However, a complete check-out and initial
calibration is necessary upon initial installation and start up to ensure system integrity.
3.2 Detector Location Considerations
There are no standard rules for detector placement since the optimum sensor location is
different for each application. The customer must evaluate conditions at the facility to make this
determination. Generally, the TS420 should be easily accessible for calibration checks. The
TS420 should be mounted pointing down to prevent water build-up on the detector head. The
detector assembly should not be placed where it may be coated by contaminating substances.
Although the Model TS420 is RFI resistant, it should not be mounted in close proximity to radio
transmitters or similar equipment.
Some general guidelines for sensor location:
! The TS420 should be used in locations that are tightly enclosed with poor or no
ventilation, such as utility tunnels or underground storage areas. These areas are likely
to have dangerously low oxygen concentrations.
! Observe the TS420’s environmental specifications when locating the unit.
The environmental specifications covering the electrochemical cell are found in the Appendix,
Section 5.1.4.
Detectors should be mounted in an area that is as free from wind, dust, water, shock and
vibration as possible.
WARNING - Operation above or below temperature limits will provide unstable readings, which
may cause false alarms or failure to alarm. See Section 5.1.4 for guidelines.
General Monitors discourages painting of detector assemblies. If the detector head is painted
over, the gas will not be able to diffuse into the sensor. If the TS420 body is painted over, the
LCD display cannot be read.