Electrical Stability Tester (EST) DWY-2A

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DWY-2A
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Electrical Stability Tester (EST) DWY-2A

Product Introduction

I.             R&D background

The former structure of the electrical stability tester is mainly composed of external host, electrode, power supply and battery, which is inconvenient to carry and limited to field use. Therefore, the instrument is placed in the instrument box to provide favorable conditions for the use of the outdoor environment.

II       Product introduction

The electrical stability tester is a portable instrument for measuring the electrical stability (ES) of oil-based drilling fluid. The electrical stability of drilling fluid is related to the stability and wettability of emulsion. The tester is in accordance with the electrical stability test procedure described in API rp13b-2 Recommended Practice for field testing of oil based drilling fluids.

The instrument is mainly composed of instrument box, test body, electrode, power adapter and glass beaker.

The electrical stability tester is a sine wave instrument, which is used to measure the relative electric strength of drilling fluid with continuous oil phase in conventional field and laboratory. It is accurate, simple and portable. The influence of chemical composition and shear history of drilling fluid on the absolute value of ES is very complex. Therefore, it is not advisable to interpret the oil wetting state of drilling fluid based on single measurement of es. When determining the treatment process of drilling fluid, only can use the change trend of ES.

 

Characteristic:

AC power plug to allow general operation of power supply requirements

Power supply: 16V 4.5a (power adapter)

Auto calibration, real time performance check

The monitor is large and easy to read


Working principle

The measurement of electrical stability (ES) is to apply a sinusoidal telecomunication signal with gradually rising voltage to a pair of parallel plate electrodes immersed in drilling fluid. The generated current is very weak until it reaches a critical voltage, and then the current intensity rises sharply. This critical voltage is called the ES value of the oil-based drilling fluid and is defined as the peak voltage measured at the current intensity of 61ua, unit is volts.


Models and Specifications

NO.

Name

Model

1

The electrical stability   tester

DWY-2A


The main technical parameters

No.

Item

Specifications

1

Power supply

16V 4.5A power   adapter

2

Range

0V~2048VPeak

3

AC Frequency

340Hz±2Hz

4

Output waveform

Sine wave

5

Pressure up speed

150V/s±10V/sAutomatic boosting

6

Breakdown current

61uA±5uA

7

Accuracy

±5%

8

Operating ambient temperature

18℃~26℃64.4°F~78.8°F

9

Electrode test temperature range

0℃~93℃32°F~199.4°F± 3° y Packstery

10

Storage temperature range

5~50℃41°F~122°F

11

Automatic power-off time

1min

12

Peak voltage display

Digital LCD

13

Electrode spacing

1.55mm0.061in

14

Net   weight/Gross weight

3/3.9kg

15

Dimensions

360×260×175mm

16

Packing   dimensions (cardboard box)

370×290×240mm


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