172-65188M-08 (
M-COS 3,16,21
Pressure Reducing Valve) 24 Jun 2015
29
<Pressure Sensor (A standard TLV accessory)>
Inspection of Pressure Sensor
A periodic inspection should be carried out at least biannually.
1. Check for corrosion or clogging with dirt.
Check for corrosion or clogging with dirt, etc., that may have occurred at the
pressure inlet to the pressure sensor and the siphon pipe,
2. Inspection and adjustment of pressure outlet signal
Equipment used for adjustment: Reference pressure generator
Inspection and adjustment of the pressure sensor itself requires a power supply,
multi-meter, etc, involving complicated procedures. Use a controller which has
been properly adjusted as described in the previous paragraph “Inspecting and
Adjusting Pressure Indication”.
(1) Check to see that the pressure reading indicates -010 to +010 (-003 to +003
for 500 kPa type) with no pressure applied (under atmospheric pressure).
(2) Applying a randomly selected pressure (between 1500 to 1999 kPa
approximately) from the reference pressure generator, check to see that the
pressure reading indicates a value within
±
10 kPa (
±
3 kPa for 500 kPa type)
(3) If the pressure reading deviates by more than 1%FS from the pressure applied,
abnormality of the pressure sensor is possible. Contact our sales
representative.
