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
Q-Pulse Id VM373
Active 29/10/2013
Page 82 of 122
