Discontinued, User options & adjustments – Max Machinery 276-5XX SERIES 4-20MA TRANSMITTERS User Manual
Page 7
Zero Adjustment: R52 (276-515/276-525) R64 (276-517/276-527) Adjust the output current
to 4.000mA with zero flow through the Flowmeter.
Span Adjustment: S1 Coarse Range and R35 or R47 Fine Span Adjustment. Table I lists the
approximate volumetric displacements of flow meters that can be used with the 276
transmitters. Use this table to calculate the RPM of the flow meter at maximum flow.
TABLE I.
METER MAXIMUM FLOW AND DISPLACEMENT
FLOWMETER
MAXIMUM FLOW
DISPLACEMENT PER REVOLUTION
CC/MIN
GAL/MIN
CC
GALLONS
213
1,800
0.48
0.870
.00023
214
10,000
2.64
10.5
.00285
215
40,000
10.6
47.6
.0128
216
100,000
26.4
169.5
.0446
220
10,000
2.64
9.12
.0024
221
55,000
14.5
23.5
.0062
222
75,000
19.8
47.4
.0125
241
189,000
50.0
62.1
.0164
251
189,000
50.0
62.1
.0164
242
540,000
143.0
182.0
.0480
243
1,400,000
370.0
574.0
.152
244
3,500,000
925.0
1700.0
.456
245
8,000,000
2114.0
6060.0
1.60
(FOR EXAMPLE: THE 213 MAX RPM IS: 1800 CC/MIN ÷ 0.870 CC/REV = 2069 RPM.)
Table II lists the RPM range of each Range Switch setting for both 276 transmitters. Use this
table to estimate the correct range position.
TABLE II.
RPM RANGE VS SWITCH POSITION (RPM AT 20mA OUT)
2 7 6 - 5 X 5
2 7 6 - 5 X 7
SWITCH
MAX
MIN
MAX
MIN
POSITION
GAIN
GAIN
GAIN
GAIN
1
1294
3620
1290
3612
2
568
1589
549
1537
3
249
697
233.6
654
4
109
306
99.4
278.3
5
48
134
42.3
118.4
6
21
59
18
50.4
276-515-350 © 2006 Max Machinery, Inc.
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USER OPTIONS & ADJUSTMENTS
—Zero & Span Adjustments
Discontinued