Aquametrix 2200R ORP Analyzer/Controller User Manual - Manual (Page 15)

Model 2200R Page 13
4.9 Parameter and Operation Checking
4.9.1 The instrument continuously checks all parameters in its memory, while measuring
the ORP. When it detects an invalid value, it flashes the LEDs in the operation
menu to indicate the parameter is at fault. You must then access the operation
menu to take corrective actions.
4.10 Simulated Input for Testing
4.10.1 TEST is function that can be used to check the setup of the 2200R. When in the
test mode the display will show a value between 0mV and 1000mV. The arrow keys
are used to change the display. The relays and analog outputs will react to the
changes of the display as if it were monitoring the ORP. This feature enables the
user to verify that the controller has been configured correctly, and that it will
correctly react to the process. Of course, the relays and outputs are no longer on
hold once the arrow buttons are used in TEST mode.
4.11 Manual Override for Control Relay A
4.11.1 The AUTO/OFF/ON button is used to set the operating mode of Relay A. This
useful feature allows the operator to check the operation of the device controlled by
the relay. On power up the control relay always returns to the AUTO setting. Be
sure to return to AUTO after completing your test if you wish to work automatically.
4.12 Utility Menu
4.12.1 The Utility Menu is provided to enable authorized personnel to change the range,
calibrate the temperature, and fine tune the analog outputs. Refer to Section 7.0.
4.13 Watchdog Timer and Self Diagnostics
4.13.1 The 2200R continuously monitors the condition of all key components of the
measuring system to ensure that the measurements are reliable. Invalid entries and
memory loss are indicated on the panel. Refer to Section 8.0.
4.14 Cycle Feature
4.14.1 With this feature the output of Relay A and/or Relay B can be cycled. The ON time
and the OFF time are independently adjustable. This feature can help eliminate the
problem of overshooting. Saving expensive chemicals.