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875 Benzene Monitor Manual
Installation Requirements
Please make sure you understand all the installation requirements before you install Titan.
Location Requirements
There are many variables involved in defining the optimum location for a gas detector. Mount the Titan:
in a location where it (or its inlet probe) is most likely to detect the gas
in an area that has good air circulation. Restricting natural air current can result in delayed detection
on a solid, stable support, where it is accessible for servicing
vertically, with the flame arresters underneath the housing
not in direct sunlight or over a heat source (This can cause the Titan to exceed its certified internal working
temperature of 50degC)
not in areas likely to flood.
An exhaust line can be attached to the outlet flame-arrestor to remove the processed air away from the Titan.
An inlet line (inlet probe), with hydrophobic filter can be attached to the inlet flame-arrestor to detect benzene in
areas remote from the Titan.
These lines can be
Maximum of 10 meters long.
Recommended cross-section: 6mm OD x 4mm ID PTFE tube.
Power Requirements
Nominal Voltage
Minimum Voltage
Maximum Voltage
We recommend a power supply unit of 24VDC at 4.5A.
Power consumption depends on the heaters in the temperature control systems. Running in ambient
temperatures below 5degC will use maximum power. Higher temperatures will reduce power consumption.
The 4-20mA output requires its own power supply at 24 (minimum) to 32VDC (maximum). It can share the
instrument's 24 to 32VDC, 4.5A, power supply if:
the 4-20mA output goes to the same location as the instrument power supply and
their Grounds will be connected together.
Refer to Electrical Connections,
Cable and Gland Requirements
We recommend you use screened cables e.g., multicore cable with SWA armour, or Braid Armour to protect
against EMI.
The manufacture and build of the cable glands is the responsibility of the installer. The cable glands must
conform to the certification standards required for the installation site. Install blanking plugs with the appropriate
certification standards to unused cable gland ports.
For general advice on selection of cable glands please visit
guidelines.
RS485 Connections
You can configure Titan for half-duplex, 2-wire, or full-duplex, 4-wire, communication. You can also configure it
to use a built-in 120R termination resistor.
Pin references are to Terminal Block-2 (Refer to Installation,
24VDC @ 3.2A
19VDC @ 4A
32VDC @ 2.4A
Terminal
Block-1.
DC power
2 core (positive and negative) 1.5mm²
4-20mA Comms
2 core 1.5mm² max
RS485 half-duplex
3 cores (including ground) 1.5mm² max
RS485 full-duplex
5 cores (including ground) 1.5mm² max
Relays (2 Outputs)
4 cores 1.5mm² max
Cable Gland
¾" NPT - Intrinsically Safe Certified
Blanking Plug
¾" NPT - Intrinsically Safe Certified
Page 24 of 65
Ion Science Ltd.
http:// cmp-products.com/cable-gland-selection-
Terminal
Block-2)
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