82
Optional device installation
7.2.2 pH probe programming
1. From the Main Menu, select OPTIONS, ADVANCED OPTIONS, DATALOG.
2. Highlight Select Inputs using the up and down keys and press SELECT.
3. Highlight pH using the
up and down keys, then press SELECT.
4. Press
CHANGE CHOICE to cycle between Logged and Not Logged, then press
ACCEPT.
5. Enter a logging interval, then press
ACCEPT. Valid logging intervals are shown on the
status bar along the bottom edge of the display.
6. Select another channel to configure or press
RETURN to back up one step or press
MAIN MENU to return to the Main Menu display.
7.2.3 pH probe calibration
Calibrate the pH probe after the pH probe is connected and programmed. Calibrating the
pH probe requires a thermometer and any two of the following buffer solutions: 4, 7, or 10
pH.
The pH probe is an application sensitive device. When used in harsh environments, the
accuracy and life expectancy of pH probes can decrease considerably. Probes must be
calibrated to the sampler each time they are cleaned or replaced. Regular inspection and
comparison to a hand-held pH meter can help determine the optimum cleaning and
calibration schedule for
specific applications.
1. From the Main Menu, select
OPTIONS, ADVANCED OPTIONS, CALIBRATION, pH.
2. Place the pH probe into the first buffer solution, then press any key to continue.
3. Enter the temperature of the first buffer solution using the numeric keypad. Press
ACCEPT to continue.
Figure 28 pH probe wiring to junction box (grounded)
1 Yellow 5 Glass
2 Green 6 Black
3 Clear 7 Red
4 pH
Goodnal STP ST041 Pre Treatment (Sigma 900 MAX All Weather Refrigerated Sampler) Vendor Manual
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