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- Rugged & Time Proven Designs
- Microprocessor type and Fully Configurable
- Specifically used for Natural Gases only
- Accuarcy inclines to the Custodial Transfer of NG
- Pressure / Temp. Compensations given
- Contact Outputs on Flow rate given
- Retransmission output on FLOW RATE
- 8 digit resolution for Totalizer / Batch value
- Transmitter P.S. @ 24 V DC for each transmitter
- Various sizes / Mountings / Enclosures supported
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| FLOW INDICATORS / CONTROLLERS � NATURAL GAS FLOW METERING SYSTEMS � AS PER AGA3 Nx19 NORMS and CONDITIONS MODEL 845N
( Microprocessor based electronics ) |
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| Introduction
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Pantech Instrument’s Model 845N represents FLOW INDICATORS / TOTALIZERS / CONTROLLERS for flow applications related to NATURAL GAS flow. These are majorly applicable in ORIFICE TYPE FLOW METERING systems. The instrument is so designed to accept 3 inputs of FLOW, PRESSURE and TEMPERATURE at a time. Based on these inputs, and other fed in parameters, the instrument calculates the INSTANTANEOUS NATURAL GAS FLOW RATE to a resolution of 4.5 digits. These calculations totally comply with AGA3, Nx19 Norms and conditions. TOTALIZED value is displayed through 8 digits red LED and this totalizer value is always protected against power failures through internal memory structures of microprocessor. Optionally the instrument is designed to give two contact relay outputs and a RETRANSMISSION ISOLATED signal on INSTANTANEOUS FLOW RATE. All configurations, calibrations output fine tunings, parameter feed ins etc. can be performed by front four keys only without opening the instrument. In the core of all the functions lies the latest and highly proven microprocessor based chipsets. The high end softwares ensure the most user friendly interactions by the user. The instrument incorporates low drift operational amplifiers and industrial grade components for long trouble free operation. Burn in of each module ensures long trouble free operations.
Model 845S at a glance :
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Used for the NATURAL GAS FLOW METERINGS based on AGA-3 Nx19 norms of ORIFICE FLOW METERING SYSTEMS.
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The high accurate calculations and heavy algorithms fed in the instrument thus allows it to be used for CUSTODIAL TRANSFER OF NATURAL GAS applications.
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Accepts three inputs – FLOW ( mA ), PRESSURE ( mA ), TEMP ( mA / RTD Pt.100 ).
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The user is required to FED IN – DP Transmitter range in MMWC, Pressure range in Kg/cm2, Flow rate for retransmission output, Orifice diameter in mm, Pipe inside diameter in mm, Specific gravity, mole % CO2 gas, mole % N2 gas, DP threshold in %.
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Response time in microseconds.
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Automatic Decimal selection in FLOW RATE CALCULATIONS. To give the highest possible resolutions in the flow rate.
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Calculates Flow rates in NM3/Hr. or SM3/Hr. . – as selected.
Pre-requisite data from the client :
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Max. / Min. / Operating Flow rates of the system
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Max. / Min. / Operating Pressure in line
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Operating Temperature
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Line size
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| Specifications |
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Inputs – 3 nos.
FLOW– 4-20mA / 0-20 mA DC
PRESSURE – 4-20 mA / 0-20 mA DC
TEMP.- 4-20 mA DC / RTD Pt. 100-3 wire
Calculations – Fixed
As per AGA-3 Nx19 orifice metering algorithms
Analog output
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Isolated / Non Isolated 4 – 20 mA DC
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Isolated / Non Isolated 0-10 V DC
Other types on factory confirmations
Contact output
Maximum 2 sets of C,NC,NO on FLOW RATE
Display (any one type)
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5 digit red LED for Instant flow rate, 3 digit green LED for Engg. Unit display, 8 digit red LED for totalized value ( LED size : 0.25” ) ( Engg. Units selectable )
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16*2 Alphanumeric LCD with above resolutions.
Accuracy
+/-0.1% of span
Communication outputs
Modem connectivity
Transmitter Power
3*24 V DC @ 40 mA
Other types on factory confirmations
Power supply
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24 V DC
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110 V AC, 50 Hz, +/- 10%
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230 V AC, 50 Hz, +/- 10%
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90-270 V AC – SMPS type
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Specials on factory confirmations
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Backup
Zero power RAM provided backup for data
Power consumption
6 VA max.
Ambient temperature
0 – 50 °C.
Storage temperature
0 – 70 °C.
Humidity
90% RH (non-condensing)
Security
Single level – Password protected
Enclosures
Weatherproof, Flameproof and all other standard types
Mounting
Panel / Wall / Field
Dimensions
96*96 / 72*144 / 144*144 / SPECIALS
*All config/calibration from front keys only
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Following table describes the availability of several models with the company right now. A general preview is only presented to the user. The dimensional and display sizes are the relational virtues of each other and hence the user is always requested to clarify the specifications of instrument with the factory prior to placement of the order.
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On confirmation with factory, changes of all types in all specifications is possible
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Model |
Mounting & Dimension in mm (H * W * D) |
Input |
Power |
Output option |
Indication Options |
Display size |
Analog output |
Contact output |
Display resolution |
Counter resolution |
845N |
Panel |
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96*96*150 |
All |
All |
Yes |
Yes |
5 digit |
8 digit |
½“- ¼” size |
144*72*150 |
All |
All |
Yes |
Yes |
5 digit |
8 digit |
½”- ¼” size |
144*144*150 |
All |
All |
Yes |
Yes |
5 digit |
8 digit |
½” size |
Wall |
Opttimum |
All |
All |
Yes |
Yes |
5 digit |
8 digit |
4” size |
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| Ordering Information |
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Please confirm the availability of the model by cross checking the table mentioned on the backside. |
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Basic Model No. (Specified by first 3 digits)
845N - Natural Gas Flow meters
Mounting & Encl. (Specified by letter following 3 digits)
P - Weatherproof - Panel
W - Weatherproof - Wall
F - Flameproof - Wall / field
I - IP65 grade – wall / field
S - Specials
Input (Specified by first digit following the letter)
1 - 3 * ( 4-20 mA DC )
2 - 2 * ( 4-20 mA DC ) & RTD
3 - 2 * ( 4-20 mA DC ) & Thcpl
Power option (Specified by the next digit / letter)
1 - 24 V DC
2 - 110 V AC
3 - 230 V AC
4 - 90-270 V AC – SMPS type
S - Specials
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Analog O/P Option (Specified by the next digit / letter)
0 - None
1 - mA/V DC isolated
2 - mA/V DC non-isolated
S - Specials
Contact output option (Specified by the next digit / letter)
0 - None
1 - 1NO + 1NC on flow
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- 2NO + 2NC on flow
Display Resolution (Specified by the next digit / letter)
1 - 5 digit instantaneous
3 digit for Eng.units
8 digit totalizer
2 - 16*2 alphanumeric LCD
with above resolution
** Please mention the color of displays clearly |
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** Customized developments can be made if the quantity permits |
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Made in India By:
PANTECH INSTRUMENTS,
102, Shailja Complex II,
Akota – Padra Road,
Nr. R. C. Patel Ind. Estate,
Vadodara – 390 020.
Telefax: (265) 2331380/6616080
Mobile: +9198240 16466/ + 9199242 10722 |
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