1、 Overview

The DWS-51 sodium ion meter is a high-precision sodium ion activity meter with a 31/2 decimal digit display
Abbreviated as instrument). It can be used in conjunction with a sodium ion selective electrode and a reference electrode composite electrode to accurately measure the battery electromotive force generated by the electrode in aqueous solution. The instrument can directly read the negative logarithm (PNa) value of sodium ion concentration in the solution.
The instrument has a solution temperature compensator, slope calibration, positioning calibrator and positioning calibration compensator (positioning coarse adjustment), slope calibration compensator slope (slope coarse adjustment).

2、 Main technical performance

1. Measurement range:
mV：(-1500～1500)mV
PNa: 0～6 pNa
2. Basic error of electronic unit:
MV: ± 0.03% (FS) ± 1 word
pNa: ±0.05pNa
3. Resolution:
mV： 1 mV
pNa：0.01pNa
4. Slope calibration compensation range: (40-100)%
5. Input current of electronic unit: 1 × 10-12A
6. Input impedance of electronic unit: 3 × 1012 Ω
7. Positioning calibration compensation range 0-7.00pNa
8. Repeatability error of electronic unit: pNa: ± 0.02pNa
9. Electronic unit stability: ± 0.03pNa
10. Basic instrument error: ± 0.03pNa
11. Instrument repeatability error: 0.03pNa
12. Environmental conditions for instrument use
(1) Environmental temperature: (15-35) ℃
(2) Relative humidity: 80%
(3) Power supply voltage: (220 ± 22) V frequency: (50 ± 1) Hz
14. Power consumption: 8VA
15. Size: 300mm × 256mm × 110mm
16. Weight: 1 kg