Summary
This instrument is made as per national standard GB/T1792 Distillate fuels－Determination of mercaptan sulfur－Potentiometric titration method. It is used to determine the mercaptan sulfur in jet fuel, gasoline,kerosene, and light diesel without hydrothion and the content is within the range of 0.0003～0.01%(m/m).
Interferences will appear when elemental sulfur is over 0.0005%（m/m）
The instrument is composed of PHS-3C PH meter, 95-1 magnetic stirrer and support device.It is the standard instrument for determining mercaptan sulfur distillate fuel.
Main technical specifications
PHS-3C PH meter
1. Grade of instrument： 0.01
2. Measurement range pH：（0～14.00）PH
mV：（0～±1999）mV(automatically polarity display）
Temp.：（0～100.0）℃
3. Minimum display unit： 0.01pH，1mV，0.1℃
4. Compensated temperature range： （0～60）℃
5. Basic error of electronic unit： pH：±0.01pH
mV：±0.1%FS
6. Basic error of instrument： pH：±0.0２pH±１word
Temp.：±0.5℃±１word
7. Incoming current of electronic unit： ≤ 2×10-12A
8. Input resistance of electronic unit： ≥１×1012Ω
9. Compensated temperature error： ±0.01pH
10. Repeatability error of electronic unit： pH： ≤ 0.01pH
mV： ≥ 1mV
11. Repeatability error of instrument： ≤ 0.01pH
12. Stability of electronic unit： ±0.01pH±１word/3h
13. Dimension： 290mm×210mm×95mm
14. Net weight： 1.5kg
15. Working condition：
a) Ambient temperature：（５～40）℃
b) Relative humidity： ≤85%
c) Power supply： AC（220±22）V， （50±0.5）Hz
d) No obvious vibration
e) No external magnetic field interference except earth magnetic field
95-1 magnetic stirrer
1. Power supply： AC220V±10% 50Hz
2. Working mode： Continuously
3. Maximum stirring capacity：2000ml
4. Heating power： Step-less adjustable within 300W
5. Rotation speed： (20～1200)r/min
6. Electric motor torque： 7.6mm/V.m
7. Temperature controlling accuracy： ±1℃
8. Temperature controlling range： room temperature +5℃～100℃
9. Timing range： (20～1200)min
10. Reversing time： (5～30)s
11. Dimension： 230mm×150mm×130mm（The bar is not included）
Burette： 10mL,scale division is 0.05mL
