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Products video
HM401 Karl Fischer Titrator Setting Introduction Video
Product Overview & Applications

The HM401 Karl Fischer Coulomb titration is the most reliable method to detect trace moisture for different substances, which was utilized successfully by HM401 trace moisture titrator. What's important, this instrument is able to work more reliably and conveniently by using the most advanced control circuit and 32 bit embedded microcontroller processor as the master control core and utilizing embedded mini operating system. Character with fast analyzing speed, simple operation, high precision and strong automatism, the trace moisture titrator has been widely used in the industry of petroleum, chemical, power, railway, pesticide, medicine and environmental protection.
Features & Advantages

●Utilizing 32 bit embedded microcontroller processor as the master control core and embedded mini operating system.
●Be stable and reliable because of constant pressure detection, high precision and rapid measuring speed.
●Simple operation and convenient digital calculation due to color touch screen and full digital keyboard.
●·Four calculation formulas are included, which can meet the different requirement of customer.
·●Miniature thermal printer with time record make searching more convenient.
·● New profile is designed according to the ergonomics.
·●Creative and optimal operating software will bring a different touch experience for you.
Technical Specifications
- Titration method:Coulometric titration(Coulomb analysis)
- Display:Color LCD touch screen
- Electrolytic current control:0~400mA automatic control
- Measurement scope:0ug~200mg
- Sensitive valve:0.1µg H2O
- Accuracy:10µg~1000µg±3µg
- More than 1mg but not greater than 0.3%
- Printer:Miniature thermal printer
- Power supply:220V±10%,50Hz
- Power:< 40W
- Ambient temperature:5~40℃
- Ambient humidity:≤ 85%
- External dimension:340×295×155
- Weight:About 5.5kg

Panel Description
Mainframe of instrument(please see figure 1 and 2):

Figure 1
| 1. Color touch screen | 2. Printer |
| 3. Electrolytic electrode socket | 4. Measuring electrode socket |
| 5. Electrolytic tank socket | 6. Turn the speed knob |

Figure 2
| 7.RS232 Interface | 8. Power socket and integrated switch |
Electrolytic tank schematic diagram:

Figure 3
| (1) Grinding plug | (2)Electrolytic electrode |
| (3)Drying tube | (4)Sample cock |
| (5)Stirrer | (6)Measuring electrode |
Electrolytic tank assembly
5.1 The cleaning, drying and assembly of electrolytic tank
5.1.1 Before use, open all the glass ports of electrolytic tank at first, then clean the titration tank, drying pipe, sealing plug and stirrer by water, methyl alcohol or acetone and clean the cathode chamber and measuring cell by methyl alcohol or acetone. Do not clean the electrode lead. (Note: Do not clean the cathode chamber or measurement electrode by water, otherwise it will result in measurement error.) After cleaning, put all the things into oven with about 60C and dry for 4 hours, and finally let them cool naturally.(New electrolytic tank and electrode are unnecessary to be cleaned, which can be assembled for use directly.)
5.1.2. Firstly, put the allochroic silica gel and silicone rubber pad into drying pipe (Do not put the powder into it) and sample cock separately, then insert the fastening screw. Secondly, paint the grinding mouth of cathode chamber, measuring electrode, drying pipe, sample cock and sealing plug with a thin layer of vacuum grease, and assemble to the relative positions except two ground stoppers and rotate slightly for better sealing.
5.1.3. Inject 100-120mL electrolytic solution by a dried funnel through grinding mouth without ground stopper, and then inject electrolytic solution by funnel through the grinding mouth. Please pay attention that the liquid surface of cathode and anode chamber must be same basically. After that, assemble the drying pipe and sealing plug well and rotate it slightly for better sealing.(The load of electrolytic solution should be carried out in the fuming cupboard)
5.1.4. Screw the fixed axis to mainframe and install the clamp to axis.
5.1.5. Put the electrolytic tank to the electrolytic tank socket of mainframe, then insert the measuring electrode plug and electrolytic electrode plug of cathode chamber into measuring and electrolytic socket separately.(please refer to figure 4)

Figure 4
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