Metex 2200P pH Analyzer/Controller - Manual (Page 16)

Model 2200P Page 14
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, range, and to fine tune the analog outputs. See Section
7.0.
4.13 Watchdog Timer and Self Diagnostics
4.13.1 The 2200P 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. See 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.