Model 948 Pressure Transmitter
948 is Viatran's low pressure HART® transmitter with hazardous location approvals. Applications include fuel tank level, gas compressors, chemical processing.
PERFORMANCE
| Full Scale Pressure Ranges | 0-3 thru 0-5K PSIA, PSIG, PSIS | |
| Turndown | 10:1 with no degradation on static accuracy or thermal effect | |
| Combined Accuracy (Non-Linearity, Hysteresis, Repeatability) | ≤±0.2% FSI | |
| Total Performance | <±0.1% /span/±50°F | |
| Thermal Effect | Over operating range: <0.35% at 1:1 -30°F to 185°F | |
| Full Scale Output (FSO) | 16 mA ± 0.1% FSO | |
| Operating Temperature Range | -40° F to 185° F | |
| Non-Operating Temperature Range | -65° F to 250° F | |
| Digitally compensated at 6 points from | -30° F to 185° F |
ELECTRICAL
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Supply Voltage:
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11.5 VDC min with 230 Ohms load
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Power Supply Regulation Effect
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±0.02% FSO per Volt
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Output Signal
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Two wire 4 to 20 mA. Digital process signal super-imposed on a 4-20 mA signal, available to any host computer system conforming to HART protocol.
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| Load Impedance | 230 Ohms to 1,100 Ohms for HART communication | |
| Circuit Protection | Reverse polarity protected. | |
| Insulation Resistance | > 200 MegOhms between all terminals in parallel and at the transmitter case. | |
| Electrical Connection | 1/2" NPT Male, 3 Wires, 18AWG, 72"L | |
| RFI /EMI | Negligible effect to 500 Mhz at | |
| Wire Color Codes |
Red + Signal Black - Signal Green Case Ground |
MATERIALS OF CONSTRUCTION
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Housing
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316 stainless steel
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Wetted Materials
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316 stainless steel
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| Shock Limitation | 100 G’s | |
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Identification
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Laser etched into body
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| Mounting | May be mounted by process piping, electrical con-duit, or optional mounting bracket to 2" pipe. |
MECHANICAL
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Pressure Connection:
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1/4" NPT(F)
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Proof Pressure:
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0-3 thru 0-500 0-750 thru 0-5000 |
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Burst Pressure:
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0-3 thru 0-500 0-750 thru 0-5000 |
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| Weight | 24 oz. ±3 oz. |
OPTIONS
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CL
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Extra lead length
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| DF | Bleed port (10K PSI and below)s | |
| DQ | Oxygen cleaning | |
| EA | Special calibration | |
| NG | ATEX Flameproof label | |
| NH | Customer specified CE label | |
| NK | ATEX Intrinsic Safety/Nonincendive label | |
| NX | CSA Intrinsic Safety label | |
| NY | FM Explosion Proof /Dust Ignition Proof label | |
| NZ | FM Nonincendive label | |
| TF | FM Intrinsic Safety label | |
| TJ | CSA Div/Zone 2 label | |
| TK | ATEX Type N Label | |
| YI | 1/8" NPT(F) | |
| YM | 1/4" high pressure tube F250-C | |
| YN | 3/8" NPT(F) | |
| YR | 1/2" NPT(F) | |
| YS | 3/8" high pressure tube F375-C |