MODEL 54e pH/ORP | SECTION 1.0 |
| DESCRIPTION AND SPECIFICATIONS |
SECTION 1.0
DESCRIPTION AND SPECIFICATIONS
1.1 GENERAL DESCRIPTION
The Model 54e pH/ORP analyzer/controller monitors and controls pH in chemical processes used in many industries. This manual's sections and appendices cover the system's configuration, calibration, and maintenance, and provides a troubleshooting guide.
All adjustments to the current outputs, alarm relays, and calibration of the pH and temperature inputs can be made using the controller's membrane keypad.
7.00pH
26.2°C. | 12.0 mA |
AL1: 0.0 | AL2: 14.0 |
FIGURE 1-1. Main Display Screen
1.2 DESCRIPTION OF CONTROLS
Figure 1-1 shows a diagram of the main display screen. Similar diagrams are used throughout this manual. The primary variable is continuously dis- played in large numerals. The process temperature and primary current output value are always dis- played on the second line of the main display screen. The third line can be configured to read several different items, as desired. In this case, it is displaying setpoints for alarms 1 and 2.
The F1-F4 keys are multifunction. The active opera- tion for that key is displayed as a label just above each function key as needed. For example, F1 is usually labeled Exit and F4 may be labeled Edit, Save, or Enter. Pressing Enter 4 will access sub- menus, while pressing Edit allows changing values and Save stores the values in memory. Esc 3 can be used to abort unwanted changes. Exit 1 returns to the previous screen. Other labels may appear for more specialized tasks.
The up t and down b keys are used to:
1.Move the cursor (shown in reverse video) up and down on the menu screens.
2.Scroll through the list of options available for the field shown in reverse video. When the last item of a menu has been reached, the cursor will rest on the third line of the display. If the cursor is on the second line, there are more items to see with the down arrow key.
3.Scroll through values when a highlighted numer- ical value is to be set or changed.
The right and left keys are used to move the cursor to the next digit of a number.
Green LEDs (labeled 1, 2, and 3) indicate when alarm relays 1, 2, and 3 are energized. The fourth relay indicates a fault condition. When a fault occurs, the red LED (labeled FAIL) lights up, a descriptive error message is displayed, and the action of the outputs and relays will be as described in Section 5.6 and Section 5.7 under fault value (e.g. 22 mA).
The red LED also indicates when the interval timer routine is activated and when the time limit has been reached on a feed limit timer. For more information on these subjects, see Section 5.7.
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