Overview
Mass Flow measurement at a comparatively low cost can be achieved using the Model 405L and 414L instruments, an RTD temperature sensor and a volumetric flowmeter such as a turbine or positive displacement meter.
Volume correction to 15°C or 60°F for petroleum products is also possible. Petroleum tables and equations that comply with API/ASTM standards for metric and US units are included in both instruments.
With additional features such as a 10 point non-linearity correction and quadrature pulse input, the Models 405L and 414L are ideally suited to the precise measurement of flow, as required in custody transfer applications.
Displayed Information
The 405L Flow Computer displays Flow Rate, Resettable Total, Accumulated Total, Gross Total and Temperature.
The 414L Batch Controller displays Batch Total, Preset Quantity, Accumulated Total, Flow Rate, Gross Total and Temperature.
Computer/Printer Interface
An RS232/422/485 option enables ticket printing and communications with a computer. Software drivers are included for a number of printers.
A ticket with time and date, a sequential delivery/batch number and the gross, net and accumulated totals can be printed with an optional header if required.
Quadrature input capability
Quadrature applies only to frequency type inputs and requires two input signals, 90° out of phase, from a single flowmeter. Through the phasing of signals, forward and reverse flows can be detected, as well as loss of signal.
This capability makes the 405L and 414L suitable for custody transfer applications where integrity of signal can be assured.
Features at a glance
- Mass Flow calculation
- Volume Correction for petroleum products
- Single and quadrature pulse inputs
- Ticket printing option with time and date
Applications
- General liquids
- Petroleums
- LPG
- Custody Transfer
- Truck Mounted
Versatile performance options
The 414L incorporates two relays that can be used to control a single or two stage control valve.
Both instruments will operate from 12 to 28V dc or from 110/220V ac mains.
The facias are watertight to Nema 4X (IP65) and resistant to most chemicals.
Each instrument is supplied with a sheet of self-adhesive engineering unit labels. A recess, adjacent to the display, is provided in which the correct label can be placed.
The instruments are supplied as standard in a panel mount enclosure. Field enclosures and explosionproof enclosures are optionally available.
Input Options
The input options for the 405L and 414L are shown in the following table:
| Model | 405LA | 405LR | 414LA | 414LR |
|---|---|---|---|---|
| Temperature | ||||
| 4-20mA | • | • | ||
| RTD | • | • | ||
| Frequency | ||||
| Single | • | • | • | • |
| Quadrature | • | • | • | • |
| Analog FLow | ||||
| 4-20mA | • | • | ||
| Density | ||||
| 4-20mA | • | • |
Temperature Compensation
Three methods of compensation are built into the instruments with the appropriate method selected during setup.
Density Correction
Providing a fluid has a known relationship between density and temperature, the density can be determined by measuring the temperature. Up to five temperature and density points can be programmed and the resulting curve is used to determine density.
The Mass Flow is then calculated as:
Mass Flow = Volumetric Flow x Density
The volumetric flow can be accurately determined by turbine, positive displacement or vortex flowmeters.
(Note: Non-volumetric inputs from pressure transmitters can also be handled.)
Volume Correction for Petroleums
Volume correction to 15°C or 60°F, as determined by API/ASTM Tables for metric and US units, is possible to the following tables:
Crude Oil: Tables 24A and 54A
Gasoline, Jet Fuels, Kerosene & Solvents: Tables 24B and 54B
Diesel, Heating Oils & Fuel Oils: Tables 24C and 54C
LPG: Tables 34 and 54
Volume Correction for General Liquids
The thermal co-efficient of expansion can be programmed and a volume corrected flow, to a programmable base temperature, will be calculated as follows:
Net Flow =
Volumetric Flow
1 + (Tf – Tb) . a
where
Tf is the flow temperature (°C or °F).
Tb is the base temperature (°C or °F).
a is the thermal co-efficient of expansion.
Batch Control – 414L
One or two stage valve control
Two output relays provide control for single or dual stage valve operation. The first relay will energise at the start of the batch and de-energise when the batch is complete.
The second relay can be programmed to energise at a set time after the start, and to de-energise at a set quantity prior to completion of the batch. This feature enables a slow start-up and slow shutdown of the flow.
The Batch Controller can also be programmed to count up from zero or down from the batch quantity.
Batch Functions
Batch Total
Batching can be performed on the Gross Total, or on the Net Total (or Mass Total).
Remote Start/Stop
Inputs on rear panel to connect momentary switches to the RUN and STOP keys.
Signal Timeout
If the flow cuts out midway through a batch, the outputs are de-energised and an alarm signalled. Timeout: 0-999s.
Batch Limit
The maximum batch limit can be programmed.
End of Batch
An open collector output signals the end of batch.
Auto-Restart
The Batch Controller can be programmed to continually repeat batches with a delay of up to 99 minutes between batches.
Batch Operations
Four key switches on the front facia, enable the batch quantity to be set, and batch operations to be started, stopped or reset.
To set batch quantity, The Batch Set key is pressed, and then the > and ± keys can be used to change and increment digits. Once set, the Batch Set key is again pressed to return to RUN mode. Key operations are straight forward and four LED’s indicate the operational status at all times.
In the RUN mode, the Display key can be used to display Flow Rate, Gross Total, Accumulated Total and Temperature.
The unique four-key operation of the Batch Controller is designed to simplify operation, making the instrument suited to use by operators with minimal training.
Specifications
General
Display
6 digit 0.7” (17.8mm) high LCD.
Display Update Rate
0.25s.
Data Retention
All set-up parameters and totals are stored in a non-volatile memory with 10 years retention.
Transducer Supply
8-24V dc field adjustable, 50mA maximum.
Power Requirements
dc Supply:
11.5-28.5V dc, 130mA typical current (no options).
ac Supply:
ac mains set internally to 95-135V ac or 190-260V ac.
Operating Temp
0 to 55ºC.
Frequency Input
Frequency Range
Rate:
0.25 to 10kHz.
Total:
0 to 10kHz.
Input Circuits
Will accept most logic, proximity switch, mV, pulse and reed switch inputs.
Scaling Range
0.1000 to 50,000.
RTD Input
Measurement
Range:
-100ºC (212ºF) to 200ºC (392ºF).
Accuracy:
0.1ºC.
RTD Type
PT100.
Linearity Correction
Internally compensated.
Adjustment
Offset can be programmed to compensate for RTD tolerance.
4-20mA Inputs
Measured
Flow, temperature and density.
Input Impedance
250 ohms.
Measurement Accuracy
0.05%.
Isolation
Inputs are non-isolated.
Tempereature Measurement Ranges
General Liquids
-273ºC to 200ºC (-459ºF to 392ºF).
Petroleums
-100ºC to 200ºC (-148ºF to 392ºF).
LPG
-45ºC to 60ºC (-49ºF to 140ºF).
Pulse Output
Type
Open collector.
Pulse Width
10ms (negative going pulse).
Max Rate
49 pulses per second.
Scaling
The pulse output is scaled and outputs one pulse each time the accumulated total increments.
Relay Outputs
Max Power
1250VA.
Max Voltage
250V ac, 30V dc.
Max Current
5 Amps.
4-20mA Output Option
(Model 405L only)
Resolution
10 bits.
Accuracy
Better than 0.1%.
Maximum Load
500 ohms internally powered. 950 ohms if powered from 24V.
Isolation
Output is isolated.
RS232/422 Option
Baud Rate
300-9600.
Parity
None, odd or even.
Word Length
7 or 8 bits.
ID Code
0-999.
Clock
24 hour clock will keep time for a minimum of 72 hours without power to the instrument.
Date
US or European format.
Optional Enclosures
Field Enclosures
IP67 (Nema 4X).
Explosion proof Enclosures
CENELEC, FM, CSA and SAA approved enclosures available for hazardous areas.
Approvals
Electrical
ETL (US) approved to UL 508 and CSA.
Interference
CE Compliance.
Important: Specifications are subject to change without notice.
Terminal Descriptions
| Standard Terminal Connections 405LR/414LR | |||
|---|---|---|---|
| No. | No. | ||
| 1 | Calibration Link | 8 | Flow Common (-) |
| 2 | Signal Ground | 9 | Flow Pulse Input (Ch. 1) |
| 3 | Flow Pulse Input (Ch. 2) | 10 | Pulse Out |
| 4 | PT100 I (+) | 11 | dc Power Out (8-24V) |
| 5 | PT100 Signal (+) | 12 | dc Ground |
| 6 | PT100 Signal (-) | 13 | dc Power Input |
| 7 | Flow Alarm | 14 | PT100 (-) |
| Standard Terminal Connections 405LA/414LA | |||
|---|---|---|---|
| No. | No. | ||
| 1 | Calibration Link | 8 | Flow Common (-) |
| 2 | Signal Ground | 9 | Flow Pulse Input (Ch. 1) |
| 3 | Flow Pulse Input (Ch. 2) | 10 | Pulse Out |
| 4 | Not to be used | 11 | dc Power Out (8-24V) |
| 5 | Temperature Input (4-20mA) | 12 | dc Ground |
| 6 | Not to be used | 13 | dc Power Input |
| 7 | Flow Alarm | 14 | Flow Input (4-20mA) |
| Relay Outputs 405L | |
|---|---|
| No. | |
| 31 | Relay 2 - Normally Open |
| 32 | Relay 2 - Normally Closed |
| 33 | Relay 2 - Common |
| 34 | Relay 1 - Normally Open |
| 35 | Relay 1 - Normally Closed |
| 36 | Relay 1 - Common |
| Relay Outputs & Switches 414L | |
|---|---|
| No. | |
| 28 | Remote RUN Switch |
| 29 | Remote STOP Switch |
| 30 | End of Batch |
| 31 | Relay 2 - Normally Open |
| 32 | Relay 2 - Normally Closed |
| 33 | Relay 2 - Common |
| 34 | Relay 1 - Normally Open |
| 35 | Relay 1 - Normally Closed |
| 36 | Relay 1 - Common |
| RS232/422/485 Options All Models | |
|---|---|
| No. | |
| 20 | RS232 Signal Ground |
| 21 | RS232 Data In |
| 22 | RS232 Data Out |
| 23 | RS422/485 (-) Data Out |
| 24 | RS422/485 (+) Data Out |
| 25 | RS422/485 (-) Data In |
| 26 | RS422/485 (+) Data In |
| 27 | RS232 CTS |
| Analog Flow Output (4-20mA) - 405L Only | |
|---|---|
| No. | |
| 20 | Not to be used |
| 21 | 0 Volts |
| 22 | 0-10 Volts |
| 23 | -12 Volts |
| 24 | I (-) |
| 25 | I (+) |
| 26 | +15 Volts |
| 27 | Not to be used |
Ordering Information
When specifying indicate model(s) required using the following method.
