Surface electrostatic resistance tester, heavy hammer type volume resistivity

DESCO, USASurface electrostatic resistance tester, heavy hammer type volume resistivityTester 19290

Order item number: 19290 kit, 770760 kit,

Standard configuration includes the following:

1. Test table: 1 unit, item number 19290 (DESCO brand), 770760 (SCS brand)

2. Test line: 1 red line/1 black line, 1.5 meters long, item number 19294

3. Distance marking: 1 10 inch/36 inch each, item number 19293

4. Heavy hammer electrode: 2 pieces, single hammer weight 2.3 kilograms, item number 50003

5. Grounding clip: 1 piece, item number 09750

6. Grounding plug, 1 piece, American standard plug, item number 09838

7. Label paper: 25 sheets, item number 19296

8. Suitcase: All the above items are placed in this box, item number 19292

Explanation: 19290 and 770760 are the same product with the same configuration. 19290 is the DESCO brand sales item number, 770760

It is the SCS brand sales item number. SCS is a sub brand of DESCO. The only difference between the two kits is the logo on the test chart.

Optional accessories:

1. Two point electrode: 1 (including BNC converter head), testing the resistance of small items, item number 19297

*The probe can be replaced by plugging and unplugging, and can be purchased separately. Item number 19299 (1 pair)

2. Concentric circular electrode: 1 (including BNC conversion head), testing surface resistance/resistivity, item number 50005

3. Grip electrode: 1, testing the resistance of the human body, shoes, and floor system, item number 19295

4. Clamp electrode: 1 pair, testing the resistance of irregular items, item number 832

5. Hanging electrode: 1 set (electrode+wristband+winding), testing gloves and finger cots resistance, item number 19298

6. Calibration resistor: 1 set (1K Ω~1T Ω, 10 standard resistors), item number HR10

measurement method

Precautions

Ensure that the tested material itself is not charged

The placement point of the heavy hammer electrode should be at least 2 inches away from the edge of the material

The placement point of the heavy hammer electrode should be at least 3 inches away from the grounding terminal on the material

When testing the point-to-point resistance of the testing table, the distance between the two heavy hammer electrodes should be more than 10 inches (matching 10 inch distance markings can be used)

When testing ground point-to-point resistance, the distance between the two heavy hammer electrodes should be at least 36 inches (matching 36 inch distance markings can be used)

The placement point of the heavy hammer electrode is usually taken at the following position to better evaluate whether the material is qualified

Common locations

Severely worn areas

central location

A location far from the grounding point

If the tested material has seams, such as block flooring, clothing, etc., two heavy hammers should be placed separately in different splicing blocks

When testing materials in the laboratory, pre cleaning treatment can be performed. For materials that have been laid and put into operation on site, do not clean them before testing, only

Only clean and retest when the test fails.

When testing, first connect the test meter and electrodes, place the electrodes on the tested material, and then press the test button

When not testing, try to shut down as much as possible to save battery consumption

50005 concentric circle electrode parameters:

2.3 kg weight, 67mm (diameter) x 120mm (height)

Inner circle rubber pad radius (r1): 15mm

Outer ring rubber radius (r2): 28.5mm

Resistance to resistivity conversion coefficient: x10 (the instrument reading is the resistance value, multiplied by 10 is the resistivity)

832 clamp electrode parameters

Red end clamp rubber pad: 6mmx6mm

Black end clamp rubber pad: 6mmx3mm

Rubber pad resistivity: 0.08 Ω - cm

Clamping force: 4.5 kilograms

Material qualification/conformity testing

Conduct qualification testing on newly purchased or installed materials, and save each test data (the instrument can store 100 sets of data). Write the record number of each test data on label paper and stick it in the appropriate position. In the future, regular compliance testing will be conducted on these materials, which can be compared with the qualification testing data stored in the instrument to understand the wear and tear and performance degradation of the materials.

DESCO, USASurface electrostatic resistance tester, heavy hammer type volume resistivityTester 19290instrument parameters

Test range: 1x103 Ω~1x1012 Ω

Test voltage: 10/100V+/-5% (automatic, 10V for less than 106 ohms, 100V for greater than or equal to 106 ohms)

Test accuracy:+/-10%,+/-20% (less than or equal to 5x103 ohms and greater than or equal to 1x1012 ohms)

Test time: 15 seconds/fast (optional)

Reading unit: Ohm (Ω)

Environmental temperature: Testing accuracy+/-10%

Relative humidity: testing accuracy+/-10 words

Data storage: 100 sets (stored in instrument memory, cannot be exported)

Screen specifications: 2.7-inch OLED display screen, 128 x 64 pixels

Battery: 4 AA alkaline batteries

Instrument specifications: 100mm (width) x 210mm (height) x 32mm (depth), weighing 0.4 kilograms

Heavy hammer electrode: 2.3 kg

Test line: 1.5 meters long, red line (4mm plug -4mm plug), black line (SMA terminal -4mm plug)

instrument calibration

Calibration environment requirements: temperature 23.9+/-1.7 ℃, relative humidity 40%~60%

The instrument needs to be exposed to the calibration environment for more than 1 hour

Ensure that the instrument battery has sufficient power

Clean the instrument test line socket with isopropanol, and do not touch the socket with your fingers after cleaning

Insert the original test line into the instrument

Insert the other end of the test line into a multimeter (with an accuracy of+/-1.25%), set the multimeter to DC voltage mode, and the multimeter will display a voltage of 10V+/-5%. Press the red test button in the middle of the tester, and the voltage will rise to 100V+/-5%, indicating that the test voltage is correct

Then connect the test line to a single standard resistor or resistor box

The standard resistance used for calibration has an accuracy of+/-2% within 1010 ohms, and an accuracy of+/-5% for 1010 ohms and above

A resistance value less than or equal to 5x103 ohms is qualified within+/-20% of the standard resistance range; The resistance value between 5x103 ohms and less than 1x1012 ohms is qualified within the range of+/-10% of the standard resistance, and the resistance value greater than or equal to 1x1012 ohms is qualified within the range of+/-20% of the standard resistance