콘크리트 전기저항측정기 (Model RM MK.II)

rmmkII.jpg

● Applications
     · Designed specifically to measure the resitivity of concrete.
     · May also be used be check the continuty, or measure the electrical resistance between areas of steel
       reinforcement, overcoming problems encountered by conventional techniques.  

● Features
     · The resistivity meter is a portable instrument designed specifically to measure the resistivity of concrete
       whose steel reinforcement has the potential to corrode.
     · Resistivity measurements can be made in areas with a potential gradient as determinded by the PW &
       DB to enable an estimate of the portable rate of corrosion to be made.
     · The resistivity meter may be used in conjunction with the data bucket to produce a resistivity map of an
       area of concrete.


 Specifications

 1. Display

 0∼1,999 digital panel meter, decimal points and annunciators are automatically selected by the range and
 function switches but the resistivity range are only shown as ㏀, NOT, ㏀·㎝.
 An over range indication is given by blaking off the last 3-digit.
 A low-battery indication is given when the supply voltage falls below 3.6V.

 2. Range Switch

 6-position switch to select range 1∼6

 3. Function Switch

 3-position toggle switch centre biased to resistivity measurements-the current or resistance(R/10) functions
 may be temporarily selected by switching to the appropriate function as indicated

 4. Analog Output

 0∼10V full-scale representing the FSR of the selected range and function
 The o/p is available via a bnc soket on the front panel or via pins 1(sig.) & 2(gnd) of the remote soket
 This may be connected to a data logger such as the CNS data bucket

 5. Remote Function

 The resistivity meter can be remotely switched ON & OFF by positive(3.5-30v) or negative(0-1.5v) logic signals
 on pins 4 or 5, respectively with respect to pin 6(gnd), of the remote socket
 A closing switch contact(between pins 3 & 4 or pins 5 & 6 of the remote socket) may alternatively be used  

 6. Probe Socket

 6-pin, front panel mounted for connection to the wenner probe array

 7. Remote Socket

 6-pin, back panel mounted for connection to an external power supply, remote ON/OFF signals and to provide
 an alternative analog output

 8. Battery Supplies

 4 x 1.5V C type manganese-alkaline cells, or 4 x 1.25 C type Ni-Cd rechargeable cells
 An external voltage of 5/6V may be applied through pins 3(+ve) & 6(-ve) of the remote socket

 9. Battery Life

 Approximately 34hrs using duracell type cells
 Approximately 10hrs using Ni-Cd rechargeable cells

10. Weight

 Complete kit including leather carrying case 5.5㎏

11. Components

 Main unit, Test bench, Accelerometer & vibrator with connection cable, Contact rod assembly, Coupling plate,   Surface mounting accelorometer, Longitudinal block, Flexural & torsional block, Operation manual