Hach 900 MAX - Manual (Page 73)

Section 5
Page 71
8990options.fm pH Probe
Figure 22 pH Probe Wiring to Junction Box (grounded)
Figure 23 pH Probe Wiring to Junction Box (un-grounded)
5.2.2 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 the CHANGE CHOICE key 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. Press MAIN MENU to return to the Main Menu display.
5.2.3 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.
Yellow
Green
Clear
pH
Glass
Red
Black
GND REF RT
D RT
D
Yellow
Green
Clear
pH
Glass
Red
GND
REF RT
D RT
D