Aquametrix 2200P pH Analyzer/Controller User Manual - Manual (Page 28)

Model 2200P Page 26
case of a memory loss problem, when so advised by AquaMetrix service
support.
9.3.3 Before performing the "ESCAPE" procedure it is important to know that this
procedure provides the option to erase all programmed values and replace them
with the factory set default values. This is true for the control relay on and relay off
setpoints, the alarm settings and the analog outputs scaling. Also, the temperature
and the pH calibration points will be set to their initial values. This means, that the
temperature and the pH calibration must be performed after an “ESCAPE”
procedure. After that, all the control, alarm and scaling parameters mentioned
above must be set to the user values.
9.3.4 To perform the ""ESCAPE"" proceed as follows.
a) Turn off the power.
b) Press and hold the RUN button for about 3 seconds, while turning on t he
power. The STATUS LED will turn red and status code 7 will be obtained to
show that the "ESCAPE" procedure was just performed.
9.3.5 After the "ESCAPE" procedure it is necessary to do the following:
a) Calibrate the temperature as described in Section 7.4.
b) Tune the analog outputs and the temperature output span to suit your particular
application and loop. See Sections 7.5, 7.6 and 7.7.
c) Leave the Utility Menu by pressing RUN.
d) Calibrate the pH, as described in Section 5.2.
e) Set up the user values for:
• Output High and Low – See Section 5.4
• Control Relay A – See Sections 5.5 and 5.6
• Control Relay B – See Sections 5.7 and 5.8
• Alarm Relay – See Sections 5.10 and 5.11
• The cycling parameters if so equipped – See Section 5.14
f) After all the above operations are performed the STATUS will turn green and
status 0 should be obtained.
g) Bring the unit on-line for measurement and control by pressing RUN.
h) The unit may be tested now, using the TEST menu item (see Section 5.12), or
the built-in self-testing feature (see Section 9.2.5).
9.4 Printed Circuit Board Replacement
9.4.1 a) To replace printed circuit boards or relays shut off all power to the 2200P,
including any independent power to the relay contacts. Make a record of the
external wiring, then disconnect the wires. Unplug the ribbon cable connector.