ACM-7 (keller)

ACM-7 (keller)

ACM-7 self-contained downhole pressure and temperature gauge


ACM-7 designed to record pressure and temperature by the hydrodynamic studies in the process of drilling and operation of oil and injection wells.

The tool measures pressure and temperature at set intervals of time and records the digital information in an electronic non-volatile memory. The pressure sensor at the same time is a temperature sensor.

After the measurement, the data is read into the computer for processing, analysis, display (printer) in graphic or digital form and transfer to other programs.

ACM-7 has improved characteristics of pressure channel through the use of pressure sensor "Keller" (Germany).

Parameter Value
Pressure channel (P)
Measuring range, kgf/ 0-250, 0-400, 0-600, 0-1000
The number of ADC bits 19
Absolute error*, kgf/ +/-0.18
Drift of zero pressure by sharp heating (30 min.) from 20 to 50°C, kgf/sq. cm +/-0.1
Hysteresis at room temperature, kgf/sq. cm +/-0.02
The sensitivity of pressure (depending on operation mode), kgf/sq cm 0.001
* the maximum absolute error for the range 0-600 kgf/sq cm  
** 1 kgf/sq cm=0.098066 MPa  
Temperature channel (T)
Measuring range, °C 0...+100, 0...+120, 0...+150
The number of ADC bits 13
Absolute error, °C +/-1
Time constant, min, not more than 3
Tool memory
Amount of memory of the tool 4 MB (1 081 344 of measurement points) or 8 MB (2 162 688 of measurement points)
Filling time memory from 300 hours (cycle 1 sec) up to 1 239 days (cycle 99 sec)
The time of storage of information 10 years
Number of write cycles in the internal memory 100000
Time parameters
The response time (measurement period), sec 1-99
The variance in time of the internal clock per day, sec, not more than +/-5
Power supply
Power source Lithium battery 3.6 V
The minimum voltage, V 3
The current consumption in the storage mode, µA 40
Current consumption in operational mode (depending on the time cycle), mA 0.043 (cycle 99 sec)
0.36 (cycle 1 sec)
The duration of the power source, the day 115 (cycle of 1 sec) 969 (cycle 99 sec) (when power supply capacity 1000mAh)
Switching on and off of the tool in the record mode using a computer  
The read data from the tool to the PC in any interval of time worked  
View the real values of pressure, temperature and voltage of the power supply to test instrument  
Setting the time cycle from 1 to 99 sec
View data on the computer screen in numerical and graphical form  
Conclusion the data obtained in the selected range to the printer in numerical and graphic form  
Save a received data in formats *.txt, *.las, *.xls (Excel)  
Communication with PC USB2.0
Read the entire memory of the tool, min, not more 2
The reliability of the tool
The average repair time, h, not more 4
Average lifetime, years 5
Length, mm от 300
Diameter, mm 20, 25, 30
Weight, kg, not more than 2
Model Diame­ter, mm Pres­sure, MPa Tempe­rature, °C Description
ACM-7-30 MPa/°С3040, 60, 80, 100100, 120, 150Channels: P, Tin. Pressure sensor Keller.
ACM-7G-30 MPa/°С3040, 60, 80, 100100, 120, 150Channels: P, Tin. Pressure sensor Keller. Gas-resistant.
ACM-7T-30 MPa/°С3040, 60, 80, 100100, 120, 150Channels: P, Tout, Tin. Pressure sensor Keller. With thermometer.
ACM-7TG-30 MPa/°С3040, 60, 80, 100100, 120, 150Channels: P, Tout, Tin. Pressure gauge Keller. Gas-resistant. With thermometer.