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4.10.
CABLE PORT
One or two cable portis are fitted to the left hand side of the cabinet to enable wiresAeads
etc to pass into and out of the cabinet. The port has two plugs, one inside, one outside
the cabinet and both plugs must be fitted when the cabinet is in operation to maintain
the cabinets excellent insulation. The plugs can be slit or holes bored to enable
wiresAeads to pass through the port. WiresAeads should enter the cabinet via the top of
the outside plug and the bottom of the inside plug to prevent condensation accumulating
between the plugs. Extra or replacement plugs can be obtained, see PART NUMBERS
4.11.
VENT
An air vent is situated at the rear of the cabinet. The hole in the vent must always be
kept clear as it prevents pressurisation of the cabinet.
4.12.
GLASS INNER DOOR
When fitted, a glass inner door enables observation of the test without unduly disturbing
the cabinet's climatic conditions. The door is held closed by sash fasteners which should
be hand tight and not forced.
If the test load dissipates heat, the glass door must be protected from absorbing heat by
radiation effect, see section 3.8 Test load protection.
4.13. RS232 CONNECTOR
On the right hand side of the instrument compartment is the 25 pin "D" type RS232
serial communications connector of the Format 550 programmer. Further details of the
pin connections are given in Part 2 of this manual.
4.14. SAFETY THERMOSTAT
A factory preset safety thermostat is fitted inside the instrument compartment to protect
against overheating of the cabinet in the event of failure of the temperature control
system.
The thermostat is set to a temperature 10°C above the maximum operating specification
of the cabinet. The thermostat must not be reset.
Should the cabinet air temperature exceed that set on this thermostat it will cause the
cabinet to fail-safe, i.e. shutdown automatically.
N.B.this thermostat monitors the cabinet only - see also 4.9 - Test load protection.
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