Second, the technical parameters
Display mode: large screen dot matrix liquid crystal display, with backlight function, Chinese character menu prompt, and all test and calculation contents in GB654l standard are written in Chinese character menu.
Keys: unmarked keys prompted by Chinese menu.
Measuring range: insulating oil for power 2-100 Mn/m.
Other petroleum products 2 ~ 200mn/m
Sensitivity: 0. 1 mN/m
Accuracy: 0. 1 mN/m
Resolution: 0. 1 millinewton/meter
Repeatability: 0.3%
Applicable temperature: 10-30℃ (typical value: 25℃)
Applicable humidity: (20-75)% RH
Power supply: AC 220 V 5% 50 Hz.
Power: 20VA
External dimensions: 185X260X360 (mm)
Weight: 10 kg
Third, the working principle
The working principle of the instrument is to apply the high-frequency induction micro-displacement automatic balance measurement system to the torsion balance, that is, when the force acting on the platinum ring changes, the balance bar connected with the platinum ring shifts in the two eddy current probes, so that the inductance generated in the two eddy current probes changes. This causes the differential transformer to lose balance, and then the input signal of the differential amplifier in the circuit loses balance. After being amplified by the amplifier, it outputs an electrical signal that changes with the force on the platinum ring and sends it to the microprocessor for processing and international standards.
Four. Structural features (Figure 1)
1, large screen LCD
2. Sample cup: used to hold the sample to be tested.
3, zero fine-tuning
4, ring frame rod
5. Platinum ring: used for measuring samples.
6. Sample tray
7, no logo button
9. Machine foot: adjust the level of the instrument.
10, printer, computer interface
1 1, power switch
12, power socket
13, fuse box
Verb (abbreviation for verb) installation and horizontal adjustment
Put the main engine on a stable platform without airflow, as shown in Figure 2, unscrew the two fixing screws on the back of the instrument, remove the upper top plate, and install the control magnet, ring frame rod and platinum ring in the position shown in Figure 3 (the platinum ring is inserted into the ring frame rod first, and the external flame of the alcohol lamp is burned out before installation. Note: Don't touch the burnt platinum ring. Adjust the three legs to center the water-pushing bubble on the sample tray, and finally put the top plate back in its original position and fix it with screws.
Edited on 20021-12-09, the copyright belongs to the author.
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