YOKOGAWA CM6G, Руководство пользователя

Страница: 48 / 65

<6. Calibration>
6-1
IM 11R02A01-02E 5th Edition : Dec. 28, 2016-00
6. Calibration
For calibration, zero and span gases are necessary. Use the gas with the specifications as near
to each measuring range for both lower and upper limit as possible.
6.1 Supply of the Calibration Gas
6.1.1 For Town Gas Use
Refer to Figure 3.2 and 3.3.
1) Close V-6 and open V-7. At this time, the flame of burner is extinguished. But if the pump is
attached, turn off the power supply of the pump first, then close V-6 and open V-7.
2) Adjust the secondary pressure of the pressure reducing valve for calibration gas cylinder, to
approx. 200 kPa.
3) Open V-9 or V-10 and introduce the calibration gas.
4) Adjust the indication of the flowmeter (3-3), by the pressure reducing valve (4-1), to become
about 10 l/min. In case of only indication check, the adjustment to approximately 2 to 3 l/min
is permissible.
5) Push the “START” switch of the calorie detector to ignite.
6) Set the computing station to Input/Output display screen. If the indication of “X2 (A-PRESS)”
and “X3 (G-PRESS)” is not ”500”, adjust each with the pressure reducing valve (3-6) and
V-16.
7) In the case of the density meter being attached, confirm and readjust (if necessary) the
indication of the flowmeter (5-3).
8) When the calibration is completed, close V-9, V-10, V-7, and open V-6. When a pump is
attached, turn on the power of pump now.
9) Push the “START” switch of the calorie detector to ignite.
10) Confirm and readjust (if necessary) the gas differential pressure and the flow rate to the
density meter.
11) Do not forget to close the root valve of the calibration gas cylinder.