**Expansion number tester

1、 Overview of PZD-8 Expansion Number Measuring Instrument:

PZD-8 type expansion sequence CNC thermometer is used in conjunction with a dedicated electric furnace to perform self heating of bituminous coal according to the requirements of the national standard GB/T5448-1997 electric heating method

Determine the cohesiveness of coal by measuring its expansion number.

2、 The functional characteristics of the PZD-8 expansion number tester are as follows:

1. The expansion number analyzer is an instrument and equipment that uses the expansion number measurement method to determine the slagging index of coal, and is suitable for use

Used by coal, coking departments, and research institutions.

2. The instrument uses resistance wire as the heating element and aluminum silicate fiber cotton as the insulation material, with fast heating speed and low energy consumption.

3. The instrument has superior temperature control performance, simple and reliable operation, and a unique temperature control method can effectively avoid temperature overshoot and burning of resistance wires.

4. Equipped with a focusing observation hole, the obtained focal blocks can be directly compared with a group of standard focal block profiles with serial numbers.

3、 Technical data of PZD-8 expansion number tester:

1. Power: not exceeding 1000W;

2. Temperature measurement range: 0-999 ℃ Accuracy: Level 0.5 Resolution: 1 ℃

3. Time measurement range: 0-999min Time measurement accuracy: ± 30s/24h Resolution: 1s

4. Heating requirements: comply with Appendix GD1341

5. Power supply: 220 (1 ± 10%) V 50Hz

4、 * * Expansion Number Tester PZD-8 * * Use of Expansion Number Temperature Controller:

1. Instrument front panel

The instrument display is divided into three sections, each with three digital tubes. The left section displays the preheating temperature (i.e. furnace temperature), the middle section displays the time, and the right section displays the test temperature

(i.e. crucible temperature).

The 'Start' button is pressed every time the power is turned on to start the program from scratch.

The 'Mute Query' button is pressed once in the * * situation to mute, and pressed twice continuously during normal operation to query. At this time, the left section

The selected preheating temperature value will be displayed, with the middle section showing the current voltage opening (with 220V as 100%), and the right section showing the heating rate per minute at that time

Speed. The "trigger" button is pressed after placing the crucible and covering it with a soil cover to start counting from zero seconds and calculate the test time again.

5、 The PZD-8 expansion number measuring instrument comes with the following accessories:

Number Name Unit Quantity Remarks

1. Electric furnace wire root 3

2 electric furnace plates, 3

3 socket sets 1

4 porcelain crucible sleeves 10

5 crucible pliers handle 1

6 quartz constant temperature dishes 1

7 nickel chromium nickel aluminum thermocouples with 2 thick ones placed underneath and 2 thin ones placed on top

8 Thermocouple Rack Cover 1