Servomex 2700 User Manual

Servomex 2700 Quickstart Manual
Servomex 2700 Quickstart Manual
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other analogue outputs to be configured. Use the QUIT or
MEASURE keys to return to the assign menu or measurement
display as required.
3.3.4 Setting up a blowback process
The blowback procedure allows the user to apply a burst of a
selected gas to the calibration port of the analyser to back flush
the sample probe and filter. The blowback gas is controlled via
a solenoid valve switched by one of the relay outputs. The
required relay output must be assigned before starting a
blowback operation. The blowback setup will include a start
time and date, a time period between blowback processes, and
a duration for the blowback process.
A blowback operation may be executed by one of the following
means:
1. By timer when the indicated start time and date is reached.
2. By external contact closure between pins 13 and 14 on
terminal block TB2 on control unit PCB.
3. From the keypad using the START BLOWBACK entry in
the setup blowback menu. The supervisor password will be
required and a relay output must be assigned to blowback.
If a start date and time is not set then the blowback can only be
initiated by contact closure or from the keypad. If the period
between blowback processes is set to zero then only a single
timed blowback will be executed. The process for setting the
blowback parameters is as follows:
1. Press the MENU key, then select CONFIGURE, enter a
valid password, select SETUP and then BLOWBACK.
2. Select SET UP BLOWBACK to set the blowback
parameters.
3. Use the arrow keys to define the duration in minutes (MM)
and seconds (SS) of the blowback. Use the ENTER key to
save the value.
4. Use the arrow keys to define the period in days and hours,
between successive blowback processes. Use the ENTER
key to save the value.

Servomex 2700 Specifications

General

Technology	Paramagnetic
Measurement Range	0-100% O2
Outputs	4-20 mA, RS232/RS485
Power Supply	24 VDC or 100-240 VAC
Operating Temperature	0 to 50°C (32 to 122°F)