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APPLICATIONS
The Model 1153 Digital Conductivity meter provides a measurement of electrical conductivity of fluids in conductivity units (CU), which are defined as picosiemens per meter in ASTM D2624. The rugged Electro/mechanical design of the Model 1153 meter facilitates ease of use for both laboratory and field applications. The meter was designed and developed for safety reasons to measure the electrical conductivity of hydrocarbon fuels, particularly jet fuels. Additional pre-amp versions are available to accommodate measurement of a variety of fluids for different applications.
Safety - Hydrocarbon fuels typically have low electrical conductivity and consequently, are susceptible to retaining a static charge. Static charges are induced, especially, when the fuel is pumped at high rates through filters.
Due to the relatively low conductivity, the static charge does not readily dissipate and is retained for a considerable period of time. This condition can result in an explosion and/or fire. Since conductivity is a function of temperature, it is very important to record the fuel temperature at which the measurement was performed.
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Specifications:
| Range: |
0 - 2000 pS/m |
| Resolution: |
+/-1 (0-2k pS/m) |
| Accuracy: |
2% of reading |
| Controls: |
1 Pushbutton, dual function |
| Display: |
Liquid crystal, 5 digits |
| Ground: |
Banana jack on electronics assy. |
| Power: |
Battery, 3 each, 3 volt lithium |
| Temp. Range: |
32° to 122° F (0° to 50° C) |
| Dimensions: |
L= 7.9 W= 2.75 D= 1.7 Probe Dia= .75 inches |
| Weight: |
12.9 ounces |
| Carrying Case: |
Hard, solvent resistant, molded plastic
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Theory of Operation - The EMCEE Model 1153 meter consists of an electronics assembly and a stainless steel probe. The probe, which is similar to a capacitor having concentric electrodes, is immersed into the fluid, up to the set of holes. During the read cycle a relatively small direct current flows through the fluid between the electrodes. The current is amplified in the electronics assembly and is displayed on the liquid crystal display in picosiemens per meter(pS/m). This data is then stored in non-volatile memory and can be retrieved until the next read.
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