Testing Parameters

PH/ISEtest

Dissolved oxygen test

Conductivity Test

range

pH:-2.0 …＋20.0

-2.00 …＋20.00

-2.000 …＋19.999

mV: -1200 …＋1200 mV

-2500 …＋2500 mV

ISE :0.000 … 9.999

10.00 … 99.99

100.0 … 999.9

1000 … 999999

Temperature:- 5.0 … 105.0 ℃ ± 0.1 ℃

Dissolved O2: 0.00... 20.00 mg/l;

0 … 90 mg/L

O2 saturation: 0.0... 200.0%

0… 600 %

Partial pressure: 0... 200.0 hPa, 0 …1250 hPa

0.00… 1000 mS/cm

0.00 … 19.99 µS/cm. K= 0.1 cm-1

0.000 … 1.999 µS/cm. K= 0.01 cm-1

Electrical resistivity: 0.00... 20 M Ω· cm

Salinity 0.0... 70.0

Temperature:- 5.0 …105.0 ℃ ± 0.1℃TDS :1 … 1999 mg/l, 0 … 199.9 g/l

Electrode constant

Fixed: 0.01 cm-1

Calibration: 0.450... 0.500 cm-1,

0.800 … 0.880 cm-1

Adjustable: 0.090... 0.110 cm-1,

0.250… 25.000 cm-1

accuracy

pH: ±-0.1 pH/±0.01 pH/±0.005 pH

mV：± 0.3 mV/ ±1 mV

Dissolved O2: ± 0.5%

O2 saturation: ± 0.5%

Voltage division: ± 0.5%

Temperature: ± 0.1 ℃

± 0.5 %

correct

Single point/2pm/3pm to 5pm

Automatic correction

one o'clock

temperature compensation

Automatic:- 5 … 105 ℃

Manual:- 25 …130 ℃

0.… 40.0 ℃

None/nlF/linear 0.000... 3.000%/K

Data Storage

200 sets manually or 5000 sets automatically, with adjustable storage time intervals

IP GRADE

IP67

interface

USB waterproof interface

power supply

4 x 1.5 V AA or 4 x 1.2 V rechargeable batteries, capable of continuous operation for 1000 hours (without backlight) or 150 hours (with backlight)