E-822-9-E
6
POWER SOURCE
POWER TO PULSE
GENERATOR
FLOWRATE
PULSE INPUT
WEIGHT
ANALOG OUTPUT
WEIGHT
PULSE OUTPUT
0.5A or 1A
24V
5V
POWER
SUPPLY
CURRENT LIMIT
AND OVERCURRENT
DETECTOR CIRCUIT
WAVESHAPING
F/I CONVERTER
CIRCUIT
(OPTION)
ONE-SHOT MULT.
OUTPUT CKT.
CHECK/RUN
CONTROL CKT.
FREQ. DIVISION
SELECTOR
1/1, 1/10, 1/100
INSTANTANEOUS POWER
INTERRUPTION DETECTOR
AND POWER RESET CKT.
METER ERROR, FREQ.
DIVISION. APPLICABLE
STANDARD SETING
JUMPERS
INTERRUPT CKT.
SETTING RANGE
0.00 to 1.99MPa
PRESSURE
SETTING
SWITCH
7-DIGIT
TOTAL
COUNTER
LED
TEST
CHECK/RUN
SELECT
SWITCH
(FRONT PANEL)
SIZE (NOM. DIA.)
SETTING
SWITCH
ONE-SHOT MULT. CIRCUIT
SINGLE-CHIP MICROPROCESSOR
6．OVERALL BLOCK DIAGRAM
Fig. 6.1
7．CONVERSION FORMULA
In response to the incoming flowrate signal from a delta meter, the computer performs weight conversion
of saturated steam according to the setpoints established on the front panel preset switches.
（
Input pulse factor
）×（
Specific weight
）×ε
t
〈
Conversion Formula
〉＝
（
Output unit
）
ε
t
＝１＋３α（
t
－
20
）
where t : Temperature
３α：
4.8
×
10
－
5
（
stainless steel
）
The specific weight is thus determined in approximation as a function of the second degree.
