1188 Instruction Man DS5000.doc Page 6 of 16
Allow this purge to continue for about 15 to 20 minutes to remove any residual moisture from
the sample pipe work and components.
Close the inlet isolation valve and install the sensor into the sensor holder. Locate and secure
the four pin sensor cable connector in positioned on the sensor. Use the locking screw in
order to affect a weatherproof seal.
NOTE
The Plug and socket will only locate in one position as the 0V pin is different to the
other three pins. However, the plug is designed so that when the retaining collar is
loosened the plug can rotate. Take care not to overly twist the wires within the DT45
case.
Open the inlet valve slowly, again and, by opening all valves after the sensor holder, allow a
low-pressure purge through the whole sample system. (Note. If a closed by-pass loop is
installed, this section of the procedure is not possible).
Set the required pressures and flows within the sample loop.
This completes the installation and commissioning but, on initial start-up, it could take
several hours for the system to reach equilibrium.
The instrument will now indicate the dewpoint of the air/gas surrounding the sensor, at sensor
pressure and the analogue outputs will be giving voltage and mA signals proportional to the
indicated dewpoint.
6 Default Instrument Configuration
The standard factory settings are as follows
•
The instrument will display the moisture content in
o
C Dewpoint.
•
Both alarms are set to trigger when rising above 20
o
C.
•
The internal buzzer is set to on.
•
The pressure compensation value is set at 0Barg.
•
The 4-20mA output is set to the full range of the transmitter e.g. 4mA = -80
o
C
20mA = 20
o
C
•
The voltage output is set to the full range of the transmitter e.g. 0v = -80
o
C
5v = 20
o
C
•
All ACAL calibrations are removed.
•
All offsets are removed.
•
All security codes are disabled.
7 Resetting the DS5000
It is possible to reset the DS5000 to factory set conditions by powering up the unit while any
one of the four front panel keys is pressed. See ‘Default Instrument Configuration’ above for
details of the default values.
