3
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EPDT-299a
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Caution
1. Install the product so that scale plate is vertical.
* If not vertical, accidental error can be made.
2. In case of liquid measurement, if there is head difference between pressure pick-up port and
pressure gauge, accuracy is influenced. For example, to measure water pressure, if installing
pressure gauge of pressure range 0 to 0.1 MPa on the place of 1 m higher than pressure pick-up
port, reading is the value of actual pressure minus 0.01 MPa. This difference is equivalent to 10% of
all scale range (Fig. 4). Conversely, if installing pressure gauge of pressure range 0 to 0.1 MPa on
the place of 1 m lower than pressure pick-up port, reading is the value of actual pressure plus 10%
(Fig. 5).
3. Avoid using the product at place where it is exposed to high temperature. If necessary, prevent the
product from being exposed to heat directly by using closure plate, etc.
4. If the fluid temperature to measure exceeds the max. temperature, mount a siphon tube to the product
to reduce the fluid temperature. Be sure to inject water to the siphon tube to protect the product.
5. Avoid using the product at place where much vibration occurs.
6. If fluid has pulsation, use dampener to install the product. To adjust dampener, close it fully at once,
then adjust it by opening little by little. In this case, do not tighten the product enough to stop pointer
swinging completely. Adjust to the extent that pointer swing remains slightly.
7. To install the product, be sure to apply appropriate tool such as spanner to hexagonal part and
tighten it. Be sure to avoid screwing the product with holding the product case.
8. Before installing the product, be sure to remove foreign substances and scale from the piping.
During installation, prevent foreign substances flowing into the piping, such as packing, seal tape,
liquid seal agent, etc.
* Commingling of foreign substance or scale into the product prevents the product from functioning
properly.
Fig. 4
Fig. 5
Main pipe
Main pipe
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Pock-up port
Pick-up port