| 1440 |
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| 1200 |
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Loop | 800 |
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Resistance |
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|
(ohms) | 650 |
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| |
| 450 |
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| 250 |
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| 0 | 10.8 | 16.28 | 20.63 | 25 | 28.3 | 37.0 | 42.4 |
Operating Voltage (Vdc)
Note: A minimum of 250 ohms of loop resistance is necessary to support communications.
Loop resistance equals barrier resistance plus wire resistance plus receiver resistance.
= Operating Area
Figure 16—Supply voltage/loop resistance chart.
LP Side
Maximum level
H2
Fixed ref. leg
Variable
Head
H1
Minimum level
. |
HP Side | 24249 |
NOTE: Lower flange seal should not be mounted over 22 feet below or above the transmitter for silicone fill fluid (11 feet for CTFE fill fluid) with tank at one atmosphere. The combination of tank vacuum and high pressure capillary head effect should not exceed 9 psi vacuum (300 mmHg absolute).
Consult Honeywell for installation of STR13D.
Figure
