User Manual

9
10.1 Parameter Settings Tutorial
When turned off, long press to enter parameter settings → Short press to switch P1-P2-P3
…P8 → Short press to select parameter (starts flickering) → Short press to change
parameter → Short press to confirm the change → Long press to return to measurement
mode.
10.2 Parameter Setting Instruction
a) Select standard pH buffer solution (P1): There are two options of standard buffer solutions: USA
series and NIST series. Refer to following chart:
Icons
pH Standard Buffer Solution Series
USA series
NIST series
Three-point calibration
1.68 pH and 4.00 pH
1.68 pH and 4.01 pH
7.00 pH
6.86 pH
10.01 pH and 12.45 pH
9.18 pH and 12.45 pH
b) Automatic lock (P2): Select “On” to activate auto lock function. When reading is stable for more than
10 seconds, the tester will lock the value automatically, and HOLD icon will display on LCD.
Press to cancel auto. hold.
c) Backlight (P3)
“Off”-turn off backlight, “On”-turn on backlight, 1- backlight will last for 1 minute.
d) Factory default setting(P8)
Select “Yes” to recover instrument calibration to theoretical value (pH value in zero potential is 7.00,
slope is 100%), parameter setting return to initial value. This function can be used when instrument
does not work well in calibration or measurement. Calibrate and measure again after recover the
instrument to factory default status.
11 Technical Specifications
pH
Range
-2.00 to 16.00 pH
Resolution
0.01 pH
Accuracy
±0.01 pH ±1 digit
Calibration Points
1 to 3 points
Automatic Temperature Compensation
0 – 50˚C (32 – 122˚F)