User Guide

Instruction Manual pH 510/ Ion 510

If you are performing a 3-point calibration, rinse off the electrode

with deionized water, place it in the next calibration standard and

proceed as follows.

8. Allow meter to stabilize in the next calibration standard. Once the

reading has stabilized, press the ENTER key to confirm the third

calibration point. The upper display flashes for a few seconds then

“SLO” appears in the upper display with the mV indicator, the

number in the lower display is the average electrode slope in mV

(see Figure 6). After a few seconds the meter reverts to the

measurement mode. You are now ready to take ion measurement.

NOTE: All the calibration values are successfully stored. Otherwise

error message will appear in the LCD if the calibration was

unsuccessful with no values stored into memory.

NOTE: You may compare the average electrode slope value with

the expected slope value for your electrode from your electrode

manual to verify electrode operation.

HINT: Minimum of 2

points and maximum

of 3 points are

allowed for Ion

Calibration. All

calibration points

should be at least one

decade apart, i.e.

valid calibration

points are 0.1, 1, 10

ppm or 1, 10, 100 ppm

or 0.1, 1 ppm or 1, 10

ppm or 10, 100 ppm.

Figure 6: Slope value in mV

Figure 7: Error message Er3

if slope not within range