Milltronics CVCC Instruction Manual download pdf (Page 53)

SIMPLE EXPONENTIAL DEVICES, P3 = 0

TYPICAL SHARP-CRESTED WEIRS

Typical Weir Profiles

For rated flows under free flow conditions, the head is measured upstream of the weir

plate at a minimum distance of 3 times the maximum head (i.e. where the liquid

surface is not affected by drawdown).

transducer *

Rectangular - suppressed

U 0 = 1.5

V - notch or Triangular

U 0 = 2.5

Sutro (Proportional)

U 0 = 1

(symmetrical or asymmetrical)

Trapezoidal (Cipolletti)

U 0 = 1.5

* The transducer must be above the maximum head by at least the

blanking value, P47.

minimum

3 x h

max

7ML19985AB01 OCM III 54

1 2 ... 48 49 50 51 52 53 54 55 56 57 58 ... 111 112

Measurement 2
Continuous 2
Weighing Systems 2
TABLE OF CONTENTS 3
7ML19985AB01 OCM III 6 6
ABOUT THIS 7
SPECIFICATIONS 9
PROGRAMMER 10
TRANSDUCER 11
TEMPERATURE SENSOR 11
COMMUNICATION SOFTWARE 12
INSTALLATION 13
OCM-3 LAYOUT 14
SYSTEM DIAGRAM 15
INSTALLING THE TRANSDUCER 16
17 OCM III 7ML19985AB01 17
SYNCHRONIZATION 18
POWER CONNECTIONS 19
DC POWER 19
AC POWER 19
COMMUNICATING VIA COMPUTER 20
INSTALLING THE PROGRAMMER 20
START UP 21
INITIAL START UP 22
11: 41 a.m 24
FUNDAMENTAL CHECKS 25
7ML19985AB01 OCM III 26 26
OPERATION 27
FLOW CALCULATION 28
FAIL-SAFE 31
FLOW RATE AND TOTALIZING 31
Flow rate 31
Viewing the data log 33
7ML19985AB01 OCM III 33 33
BLANKING 34
TEMPERATURE 34
TIME AND DATE 34
EMULATION MODE 35
FLOW VELOCITY INPUT 36
AUXILIARY HEAD INPUT 36
DC OUTPUT 37
DIAGNOSTIC AIDS 37
‘D’ PARAMETER LISTING 38
7ML19985AB01 OCM III 40 39
‘F’ PARAMETER LISTING 40
7ML19985AB01 OCM III 42 41
‘P’ PARAMETER LISTING 42
flowrate 43
% flow / min 48
‘U’ parameters required * 52
U1 = throat width b U5 = Cd 57
U2 = hump height p U6 = A 57
U3 = throat length L 57
BS-3680 RECTANGULAR FLUME 58
blanking value, P47 58
7ML19985AB01 OCM III 59 58
U0 = crest width b U3 = Cv 59
U1 = crest height p U4 = Cd 59
U2 = crest length L U5 = A 59
7ML19985AB01 OCM III 61 60
U1 = throat width b U6 = Cd 61
U2 = hump height p U7 = Cs 61
U3 = throat length L U8 = A 61
U4 = slope m 61
BS-3680 TRAPEZOIDAL FLUME 62
7ML19985AB01 OCM III 63 62
BS-3680 U-Flume, P3 = 4 63
BS-3680 U-FLUME 64
7ML19985AB01 OCM III 65 64
U0 = crest width b U3 = C 65
U1 = crest height p U4 = Cp 65
U2 = crest length L 65
BS-3680 FINITE CREST WEIR 66
3 to 4 x h 66
7ML19985AB01 OCM III 67 66
U1 = crest width b U4 = K 67
U2 = crest height p 67
7ML19985AB01 OCM III 69 68
Reference 69
7ML19985AB01 OCM III 71 70
RECTANGULAR WEIR - CONTRACTED 72
7ML19985AB01 OCM III 73 72
‘U’ parameters required ** 75
PALMER-BOWLUS FLUME 76
blanking value, P47 76
7ML19985AB01 OCM III 77 76
RECTANGULAR AREA X VELOCITY 82
7ML19985AB01 OCM III 83 82
U1 = channel base width b 83
U2 = channel depth ht 83
TRAPEZOIDAL AREA X VELOCITY 84
7ML19985AB01 OCM III 85 84
U1 = channel base width b 85
U2 = transition height ht 85
7ML19985AB01 OCM III 87 86
7ML19985AB01 OCM III 88 87
U-CHANNEL AREA x VELOCITY 88
7ML19985AB01 OCM III 89 88
7ML19985AB01 OCM III 90 89
U1 = lower angle alpha (α) 91
U2 = upper angle beta (β) 91
U3 = transition height ht 91
GULL WING AREA X VELOCITY 92
7ML19985AB01 OCM III 93 92
U1 = bottom radius r 93
U2 = axial displacement d 93
7ML19985AB01 OCM III 98 97
MAINTENANCE 98
ERROR CODES 99
COMMUNICATIONS 100
Protocol 101
Interconnection 102
Timed Print Out 103
Command Response 107
Modem Communication 109
Establishing Communication 110
Ending Communication 111
*7ml19985AB01* 112
Rev. 1.0 112

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Milltronics CVCC Instruction Manual Page 53

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