18
OPERATION
2.6 INSERT SENSOR NEEDLE INTO SAMPLE MATERIAL
This section instructs how to use the different types of needles with each sample material.
2.6.1 SOFT MATERIAL SAMPLE (TC-S70 OR TC-S100 SENSOR)
Follow these instructions for use with soil, and other loose material.
METER designed the two VARIOS sensors to be easy to install and use. The sensor needle(s)
must be inserted all the way into the sample material. It is easier to get the needles inserted
into some materials than others. Please observe the following considerations when installing
the sensors.
• Ensure there is a minimum of 1.5 cm of material surrounding the sensor needle in all
directions to avoid errors.
• Ensure there are no air gaps around the sensor needle.
• Insert the sensor needle all the way into the sample material (
).
CAUTION
Bending the needles can damage any sensor beyond repair. If the needle becomes bent, gently bend it back. If a
needle has been bent and is no longer taking good readings, a replacement may be needed. Contact
for a replacement.
Below is a list of tools needed to install and secure the sensor in the soil sample:
• Installation tool
• Sensor with a TC-S100 or TC-S70 needle
• At least 2 Retaining rings
Using the tools listed above, please follow the steps below to insert the sensor needle into
the soil sample.
1. Clean any soil off the sample ring.
2. Cover the sample ring with a clean cover.
3. Place the saturated soil sample in the installation tool (
).
4. Align one of the soil sample ring drill holes with the installation tool guide rail (
).
Installation
tool
Soil sample ring
Guide
rail
Figure 18 Soil sample ring on installation tool