Cameron BARTON 764 - Section 1: Specialized Conditions; Specialized Performance Conditions; Pressure and Connection Details; Application and Service Life

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Model 764 Differential Pressure Transmitter Section 1
LOCA Performance* ....................... < ±5.0% error during the rst ve minutes of LOCA
(420°F)
< ±10.0% error thereafter to the conclusion of the
LOCA test, as performed per Document No.
9A-CR3-764-9
The LOCA errors include the cumulative e󰀨ects of
thermal, mechanical, radiation, and seismic aging,
as performed per Document No. 9A-CR3-764-9.
Long Term Drift* ..............................±1.0% of factory-calibrated span per year, cumula-
tive
Time Response .............................. < 180 msec. to reach 50% for 10% to 90% step
function
Maximum Safe Working Pressure .. 3,000 psig
Static Pressure E󰀨ects*
60" WC to 42 psid spans ............ ±0.2% of the factory-calibrated span per 1000 psig
43 to 320 psid spans .................. ±0.5% of the factory-calibrated span per 1000 psig
Overpressure E󰀨ects
60" WC to 42 psid spans ............ ±0.5% of the factory-calibrated span per 1000 psig
43 to 320 psid spans .................. ±1.0% of the factory-calibrated span per 1000 psig
Overpressure Limit ......................... Up to maximum safe working pressure on either side
of DPU without damage to unit
Process Connections...................... 1/4" and 1/2" NPT on both high and low pressure
sides
Weight ............................................20.5 pounds
Electrical Interface .......................... 2-wire (16 AWG) pigtail (20' long)
*Note: Turndown has a directly proportional e󰀨ect on the indicated specications.
IMPORTANT: The Model 764 transmitter has no integral electronic interference sup-
pression features. If an instrument is to be installed in an area containing
EMI/RFI sources and this interference cannot be tolerated, take precau-
tions to protect the transmitter signal. See also EMI/RFI Shielding, page
18.
Application
The Model 764 Dierential Pressure Transmitter was subjected to IEEE
323-1974/344-1975 qualications testing which found the device suitable for
functional service in a harsh environment (LOCA/MSLB).
The service conditions associated with the Model 764 Transmitter nuclear ser-
vice qualications are presented below:
Qualied Service Life
(accelerated aging for
1,830 hours at 257ºF ...................... 85 years at normal conditions of 104ºF
54 years at normal conditions of 113ºF
35 years at normal conditions of 122ºF
23 years at normal conditions of 131ºF
10 years at normal conditions of 140ºF
Radiation Exposure ........................ 200 x 10
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Rads (TID Gamma)