Liquid Controls SP3000 User Manual
INSTALLATION & INSTRUCTION
MANUAL
SP3000
FLOW COMPUTER
DOC#: MN-3000.DOC
2
- WARNING -
This instrument contains electronic components that are susceptible to damage by static electricity.
Please observe the following handling procedures during the removal, installation, or handling of the
internal circuit boards or devices.
HANDLING PROCEDURES
1. Power to unit must be removed.
2. Personnel must be grounded, via wrist strap or other safe, suitable means, before any printed
circuit board or other internal device is installed, removed, or adjusted.
3. Printed circuit boards must be transported in a conductive bag or other conductive container.
Boards must not be removed from protective enclosure until the immediate time of installation.
Removed boards must be placed immediately in protective container for transport, storage, or
return to factory.
COMMENTS
This instrument is not unique in its content of EDS (electrostatic discharge) sensitive components. Most
modern electrical designs contain components that utilize metal oxide technology (NMOS, CMOS, etc.).
Experience has proven that even small amounts of static electricity can damage or destroy these devices.
Damaged components, even though they appear to function properly, exhibit early failure.
*** SPONSLER, INC. STRONLY RECOMMENDS THOROUGH UNDERSTANDING AND REVIEW OF
THIS MANUAL PRIOR TO INSTALLATION.
3
TABLE OF CONTENTS
INTRODUCTION 4
1.1 GENERAL DESCRIPTION 4
1.2 FEATURES 4
1.3 APPLICATION 5
1.4 GENERAL SPECIFICATIONS 6
1.5 INPUT S PEC I F ICATIONS 6
1.51 ANALOG INPUTS 6
1.52 RTD TEMPERATURE INPUTS 7
1.53 DIGITAL FLOW INPUT 7
1.6 OUTPUT SPECIFICATIONS 8
1.61 ANALOG OUTPUT 8
1.62 DIGITAL FLOW PULSE OUTPUT 8
1.63 RELAY OUTPUTS 9
1.64 AUXILIARY POWER OUTPUT 9
1.7 RS-232 COMMUNICATIONS PORT 9
1.8 DATA DISPLAY AND KE YPAD 10
INSTALLATION 10
2.1 MOUNTING THE INSTRUMENT 10
2.2 CONNECTING INPUTS AND OUTPUTS 11
PROGRAMMING CONSIDERATIONS 18
3.1 FRONT PANEL KEYPAD OPERATION 19
3.2 SETTING COMPUTATIONS 20
3.3 SELECTING THE ENGINEERING UNITS 22
3.4 SETTING THE HARDWARE 22
3.5 SETTING THE VARIABLES 24
3.51 SETTING THE PRESSURE VARIABLES 24
3.52 SETTING THE TEMPERATURE VARIABLES 25
3.53 SETTI NG T H E FLOW VARIABLES 26
3.54 FLOWCHART: DIGITAL PULSE -LINEAR 26
3.55 FLOWCHART: DIGITAL PULSE - SIXTEEN POINT 27
3.551 DIGITAL PULSE – SIXTEEN POINT PROGRAMMING 28
3.6 ANALOG LINEAR INPUT SETTINGS
3.7 ANALOG ORIFICE/PITOT INPUT SETTINGS 33
3.8 SETTING THE FLOW OUTPUT VARIABLES 34
CLEARING THE TOTALIZER: RESETTING THE TOTALIZER TO 0.000 34
CHECKING THE ALARM: VIEW THE MOST RECENT ALARM CONDITION 36
REAL TIME CLOCK 39
RUNNING MODE 40
8.1 SHOW DATA 41
8.2 PRINT LIST (RS-232 OPTION) 42
8.3 PRINT SYSTEM SETUP (RS-232 OPTION) 42
8.4 EXAMINE HARDWARE 43
8.5 EXAMINE COMPUTATIONS 43
8.6 EXAMINE VARIABLES 43
8.7 CHECK ALARM 44
8.8 LOCK/UNLOCK 45
PRINCIPLES OF OPERATION 46
9.1 GENERAL 46
9.2 TEMPERATURE CALCULATIONS 46
9.3 PRESSURE CALCULATIONS 46
9.4 FLOW CALCULATIONS 46
Appendix i 48
Appendix ii 51
Appendix iii 51
Appendix iv 52
Appendix v Troubleshooting Guide 52
RS-232 OPERATING INSTRUCTIONS 53
3.552 PROGRAMMING EXAMPLE 29 31
3.61 ANALOG 16 POINT INPUT SETTINGS 32
8.1.1 DISPLAY DATA SE TUP 41
4
MODEL SP3000 MASS FLOW COMPUTER
INTRODUCTION
1.1 GENERAL DESCRIPTION
The Model SP3000 is a microprocessor based instrument designed to measure and compensate
flow in an industrial environment. Three inputs - temperature, pressure, and flow – are provided
for calculating the flow at standard conditions. Special signal conditioning circuitry is included to
allow direct connection of 2, 3, or 4 wire platinum Resistance Temperature Detectors (RTDs),
voltage inputs or current loops. A high speed digital input is provided for interfacing with the
meter mounted SP714 Pulse Amplifier. A 32 terminal strip on the rear panel provides easy
connection to the instrument.
The Model SP3000 is powered by 50 or 60 Hz, 110 or 220 VAC, switch selectable, or can be
ordered for 24 VDC power.
The Model SP3000 is designed to provide continuous, on-line, compensation for true flowrate
from volumetric flow transducers. All volumetric, mass, or heat flow calculations are taken with
permission from the Flow Measurement Engineering Handbook written by R.W. Miller. Steam
(100% quality, saturated, or superheated to 850
Steam tables.
Operator interface is through a 16 key keypad and a 2 line by 20 character liquid crystal display.
(The Model SP3000 may also be set up entirely through the optional RS-232 port). Range
selection, input filtering characteristics, scaling factors, etc. are selected through the front panel
keypad or RS-232 interface. There is no need to disassemble the unit or set any dip switches.
Scaled digital and 4-20mA analog current outputs, that represent compensated flow, are standard
for use in remote monitoring of flow. Two form C relays provide isolated flow or
temperature/pressure alarm outputs.
There is a single precision voltage reference in the unit used for all analog measurements. A
single multi-turn potentiometer is provided for factory calibration. No field adjustments are
necessary.
1.2 FEATURES
The Model SP3000 is designed to provide accurate and low cost compensated flow
measurement for industrial applications. The instrument can be set up to display volumetric,
mass, or heat flow, as well as totalized flow, with an overall accuracy of 0.25%.
Fully programmable from the front keypad, the microprocessor-based Model SP3000 Flow
Computer provides the operator with prompts to set up the operating parameters of the
instrument.
The Flow Computer offers the following features:
* Front Panel 16 key programming keypad
* 2 line 20 character liquid crystal display
* Compensates gas & steam flowrates for
temperature and pressure
* Compensates liquid flowrates for temperature
* Direct input of 100 ohms RTD
* Can display flow and heat flowrates and totals
* Scaleable 5V output pulse
* Analog output of 4-20mA proportional to
compensated flowrate
* 12 bit input resolution for A/D conversion
o
F) computations are based on the 1967 ASME
* Non-volatile RAM memory
* Self diagnostics of instrument
* Supervisory lockout of keypad
* Provides 24 VDC excitation at 100mA
* English and metric engineering units selectable via
front keypad
* Flowrate and temperature/pressure alarms via two
SPDT relays
* Real time clock and calendar (not battery backed)
* Optional 16 point linearization of input signal
* Optional RS-232 communications
5
1.3 APPLICATION
P
Pulse Output
RS232 Output
4-20mA Output
TRANSDUCER
AMPLIFIER
100 OHMS RTD
FLOWMETER
COMPUTER
TOTALIZER
PRINTER
PRESSURE
SP714 PULSE
SP3000
MASS FLOW
BELL
LIGHT
Alarm Outputs
1 2 3 4 5 6
REMOTE
* Pressure Transducer sends 4-20mA signal to Model SP3000
* 100 ohms RTD direct hook-up to Model SP3000
* Meter Mounted SP714 Pulse Amplifier sends digital signal to Model SP3000
* Model SP3000 calculates flow and sends out signals
* 5V pulse out to remote totalizer in supervisory area
* 4-20mA out to stripchart recorder tracks trends
* RS-232 out to printer for data logging
* Alarm relays activate bell and/or light as needed
*
6
1.4 GENERAL SPECIFICATIONS
1.5 F
12
11
A/D
92 K
Operating Temperature: 32
Storage Temperature: -10
o
to 122o F (0o to 50o C)
o
to 160o F (-32o to 71o C)
Humidity: 0 to 90% Non-Condensing
Front Bezel: NEMA 4X
Case: ABS Plastic
Dimensions: See page 2-1, fig 2-1
Voltage: 115 or 230 VAC +/- 15% (Switch Selectable)
50/60 Hz, 24 VDC +/- 20%
Power Consumption: 10 Watts max.
1.5 INPUT SPECIFICATIONS
The following applies to all inputs in all modes. Inputs are referenced to the signal ground. All ground terminals are
connected internally. The exception is the RTD input which is differential but is referenced to ground.
Transient Protection: 100V 5nsec
Note: In the event of the specified fault conditions, unit may temporarily malfunction, but no permanent
damage will occur.
1.51 ANALOG INPUTS
Temperature, Pressure, and Flow (1 each)
* Current Input
Input Impedance: 100 ohms
Range: 0-20mA, 4-20mA
Maximum sustained input voltage: 5VDC (Fault Condition)
100
22.9 K
A/D
1.5 F
13
14
Typical Current Input Schematic:
* Voltage Input
Input Impedance: 100K ohms
Range: 0-5V, 0-10V
Typical Voltage Input Schematic:
7
1.52 RTD TEMPERATURE INPUTS
2.2 VDC @ 2mA
1.5 F
1.5 F
20K
20K
100K
1.5 F
5 VDC
@ 0.9 mA
5.6 K
39 K
100 K
+5 VDC
+5 VDC
16
1718COUNTER
Compatible RTD type: 100 ohms Platinum
(a=0.00385; DIN 43-760 Calibration)
Configuration: 2, 3, or 4 wire
Excitation Current: 2mA typical
Max Fault Current: 15mA
Max Voltage on Sense Inputs: 50 VDC
Rejection of 50-60Hz signal: 40 dB (minimum)
(Automatically based on line frequency)
Raw Accuracy: 0.2% FS RTI
Temperature Range: -323.5
(-197.5
Typical RTD Schematic:
o
to +1378.7o F
1
2
3
4
o
to +748.1o C)
~
A/D
1.53 DIGITAL FLOW INPUT
Range: 3-30 VD C Pu ls e
Type: Dry contact, opto-isolated or
voltage source
Max Input Frequency: 40kHz
Min. Pulse Width: 10µsec (with 40kHz filter)
Thresholds: OFF is less than 2.0V/ ON is
greater than 2.5V
Input Impedance: Less than 30K ohms to ground
Excitation Voltage: 5VDC through 5.6K ohms resistor
Min. Frequency to maintain rate display: 1 Hz
Note: Totalizer counts all pulses down to 0 Hz
Typical Digital Pulse Input & Schematic:
8
1.6 OUTPUT SPECIFICATIONS
~
.001 F
1.5 F
TTL 5 VDC
@ 21mA
+ 5 VDC
CPU
3.3 K
3.3 K
3.3 K
220
220
21
20
1.61 ANALOG OUTPUT
Number: 1
Range: 4-20mA DC, sink only
Compliance Voltage Range: 3.0-24 VDC
Load Type: Non-Inductive
Accuracy: +/- 100 µA
Update Rate: 1 Hz
Analog Output Schematic:
1.62 DIGITAL FLOW PULSE OUTPUT
This output is intended to drive a counter with a minimum input impedance of 1000 ohms. It is also
compatible with TTL, LSTTL, and 5V CMOS logic inputs. It is slew rate limited to help prevent RFI.
Number: 1
Output High Voltage No Load: 4.5 Volts min.
4.0mA source: 4.5 Volts min.
Output Low Voltage No Load: 0.2 Volts max.
4.0mA sink: 1.0 Volts max.
Output Waveform: Symmetric square wave above 1Hz
100msec pulse below 1Hz
Max Output Slew Rate: 27 Volts/µsec
Sustained Fault Voltage for
no permanent damage: 7 Volts
Transient Protection: 1500V 50µsec
Pulse Output Schematic:
19
CPU
A/D
100
18
9
1.63 RELAY OUTPUTS
Ground (7)
One relay is provided as a flow alarm and a second is provided for the other alarm conditions.
Each has the following specifications:
Type: Dry contact, Form C
Contac t Rat ing: 10A at 115/230 VAC/28 VDC
Typical Relay Output Schematics:
22
23
24
1.64 AUXILIARY POWER OUTPUT
Voltage: 24 VDC regulated and filtered
Isolation: 230 VAC max
Current: 0 to 100 mA
Protection: Short Circuit Proof
1.7 RS-232 COMMUNICATIONS PORT
(Refer to RS-232 Addendu m supplied with RS-232 option)
Connector: 25 Pin Sub-D
Input Impedance: 3000 ohms to 7000 ohms
Compliance Voltage:
Output: -25 to –5 (Mark); 5 to 25 (Space); Volts
Input: -25 to –3 (Mark); 3 to 25 (Space); Volts
Protection: Short Circuit Proof
Protocol: 8 bits, 1 stop bit
Parity: None (Not Monitored)
Available Baud Rates: 300, 1200, 9600
RS-232 Connector Pin Out:
Printer Busy (11)
Transmit (3)
Recieve (2)
12345678910111213
25
Pins 6, 8, and 20 are jumpered together
Pins 4 and 5 are ju m pered together
24 23
22 212019
18 17
16 15
14
10
1.8 DATA DISPLAY AND KEYPAD
7.055 (179.2)
2.495 +/- .010
7.365 +/- .010
.525
6.000 (152.4)
2.480
3.305
(207.5)
8.170
Internal 2 line by 20 character dot matrix LCD display. Sealed, 16 key panel featuring numeric keys 0-9,
plus the following keys:
A Advance through menus
B Back up through menus
C Cancel current menu selection
D Decimal point key
ENT General purpose enter or recall data key
CLR Data clear key
INSTALLATION
2.1 MOUNTING THE INSTRUMENT
The Model SP3000 can be mounted in a user panel greater than 0.047” (1.2mm) and less than 0.187”
(4.7mm) thick. Figure 2-1 shows the cutout dimensions, bezel size, and depth needed for the instrument.
Be sure to provide additional space for cabling and connections behind the instrument (approximately 1.0”).
Additionally, all wiring to the back of the instrument should have sufficient service loops to allow for the
easy removal of the instrument from the panel.
Slip the gasket provided over the rear of the instrument case and slide it forward until it engages the inner
surface of the front bezel, slide the instrument into the panel opening. Install the screws provided in the
mounting brackets and insert in the slots located on all four sides of the instrument. Tighten the screws to
firmly secure the bezel and gask et up against the pa nel .
CAUTION: Do not over tighten mounting screw brackets
7.349 (186.7)
(187.0 +/- .25)
(63.4 +/- .25)
PANEL CUTOUT DIMENSIONS
321
654
987
DCBA
C0E
(83.9)
(13.5)
(62.9)
Figure 2-1
Dimensional Layout
11
2.2 CONNECTING INPUTS AND OUTPUTS
PIN
RTD
VOLTAGE IN
CURRENT IN
FUNCTION
1
6
RTD EXCITATION +
----------------------------
-------------------------
V IN +
----------------------
----------------------
GROUND (SHIELD)
20
21
PULSE OUTPUT
GROUND (SHIELD)
5 V SCALED
PULSE OUTPUT
24
COMMON
25
N.O.
28
29
115/230 VAC 50/60 HZ
115/230 VAC 50/60 HZ
POWER (AC)
30
31
+24 VOLTS ISOLATED Output available
24 VOLTS RTN on AC Powered Units
+24 VDC IN Power input for
-- DC (GND) DC Powered Units
32
CHASSIS GROUND
Make sure all power is disconnected before making any electrical connections. All connections are
completed at the rear terminal strips as indicated in the external wiring diagram. If cables are in areas with
heavy electrical fields, shielding will be required for noise immunity. One end of the shielding should be
connected to earth ground. Figures 2-2 though 2-9 show the input, output and power wiring locations for
the 32 point terminal block on the back of the instrument.
2
RTD SENSE +
3
RTD SENSE –
4
RTD EXCITATION –
5
GROUND (SHIELD)
7
RTD EXCITATION +
8
RTD SENSE +
9
RTD SENSE –
10
RTD EXCITATION –
11
GROUND (SHIELD)
12
----------------------------
13
----------------------------
14
GROUND (SHIELD)
15
----------------------------
16
EXCITATION VOLTAGE (5.6K Ω PULLUP TO 5 VDC)
17
PULSE INPUT (3-30 VOLTS)
18
19 ANALOG OUTPUT (SINK) ANALOG OUT 4-20mA
-------------------------
-------------------------
------------------------V IN – (GND)
-------------------------
------------------------V IN – (GND)
V IN +
------------------------V IN – (GND)
V IN +
----------------------
---------------------I IN +
I IN – (GND)
---------------------I IN +
I IN – (GND)
---------------------I IN +
I IN – (GND)
----------------------
CHANNEL 1
TEMPERATURE
CHANNEL 2
PRESSURE OR
AUX TEMP
CHANNEL 3
FLOW
ANALOG INPUT
CHANNEL 3
FLOW
ANALOG INPUT
22
N.O.
23
N.C.
26
N.C.
27
COMMON
Figure 2-2
Terminal Designation Label
ALARM RELAY
FLOW ALARM
RELAY
12
12345
17
183031
32
171830
31
32
12345
SP714 REV B
POWER
D1
TEST
SENS
S1
R1
J1
OUTPUT SIGNAL
D2
- DC (GND)
SIGNAL OUT +
+24 VDC
PICKUP COIL
A SIG IN +
B SIG IN -
FLOW COMPUTER
PULSE INPUT
GROUND (SHIELD)
+ 24 V
24 V RETURN
CHASSIS GROUND
PULSE INPUT CONNECTION
FLOW COMPUTER
PULSE INPUT
GROUND (SHIELD)
+ 24 V
24 V RETURN
CHASSIS GROUND
PULSE INPUT CONNECTION
J1
- DC (GND)
SIGNAL OUT +
+24 VDC
PICKUP COIL
A SIG IN +
B SIG IN -
(JU1 INSTALLED)
D1
SP717 REV A
(JU1 INSTALLED)
OUTPUT SIGNAL
D2
Figure 2-3
SP714 & SP717 Pulse Amplifiers Wiring Diagram
13
2 WIRE CONNECTION
RTD EXCITATION +
GROUND (SHIELD)
4 WIRE CONNECTION
RTD WIRING DIAGRAMS
I IN +
CHASSIS GROUND
456
303132
3 WIRE CONNECTION
1
2 3 4 5 1 2 3 4 5
RTD SENSE +
RTD SENSE -
RTD EXCITATION GROUND (SHIELD)
1 2 3 4 5
RTD SENSE +
RTD SENSE -
RTD EXCITATION GROUND (SHIELD)
RTD EXCITATION +
RTD SENSE +
RTD SENSE -
RTD EXCITATION -
4-20mA T/C
TRANSMITTER
TEMPERATURE TRANSMITTER
4-20mA CONNECTION
FLOW COMPUTER
GROUND (SHIELD)
V IN +
+ 24 V
24 V RETURN
Figure 2-4
Temperature Transmitter Input Wiring Diagrams
14
+
10
-
-
I IN +
GROUND (SHIELD)
V IN +
+ 24 V
24 V RETURN
CHASSIS GROUND
FLOW COMPUTER
4-20Ma PRESSURE
TRANSMITTER
11
12
30
31
32
4-20mA CONNECTION
10
I IN +
GROUND (SHIELD)
V IN +
+ 24 V
24 V RETURN
CHASSIS GROUND
FLOW COMPUTER
5 VOLT PRESSURE
TRANSMITTER
11
12
30
31
32
0-5 VOLT CONNECTION
Figure 2-5
Pressure Transmitter
Analog Input Wiring Diagrams
15
FLOW COMPUTER
192021
30
31
32
STRIP CHART
192021
COUNTER
12345678
RECORDER
-
+
ANALOG OUTPUT CONNECTION
SINK (4-20mA)
PULSE OUT
GROUND (SHIELD)
+ 24 V
24 V RETURN
CHASSIS GROUND
Figure 2-6
Analog Output Wiring Diagram
FLOW COMPUTER
REMOTE ELECTRONIC
+
-
PULSE OUTPUT CONNECTION
SINK (4-20mA)
PULSE OUT
CHASSIS GROUND
Figure 2-7
Pulse Output Wiring Diagram
16
Figure 2-8: Wiring Diagram-2-wire Probe
17 Figure 2-8: Wiring Diagram-2-wire Probe
18
PROGRAMMING CONSIDERATIONS
Run? Allows crossover from Setup to Run
Go To Standby? Allows crossover from Run to
made
Programming the SP3000 Flow Computer for the desired operation is very simple. All programming
selections and data entry are accomplished via the 16 keys located and labeled on the front panel. The
software in the unit contains two Top Level Menus: “Setup” Menu and “Running” Menu. The “Setup” Menu
allows the selection of operating parameters and entry of data variables. The “Computation” selection sets
the formulas used to process the raw input data into meaningful information. The “Engineering Units”
selection establishes the measuring system that is used for entry and display of the data. The “Hardware”
selection sets the type of input data and activates the proper input terminals on the rear of the unit. The
unit will automatically determine the setup parameter requirements based on the “Computation” and
“Hardware” selections. Prompts are displayed for entry of the required data as the operator progresses
through the setup menu. To aid in the setup, a calibration worksheet is provided. Fill out the worksheet
before beginning setup. Review this section for setup procedures and follow the worksheet for data to be
entered.
The “Running” menu allows the setup of the data display and examination of the programmed operating
parameters. The parameters may not be changed in the “Running” menu.
Either menu allows checking the alarm, clearing the totalizer, or accessing the lock.
Structural Division of the two Top Level Menus:
SETUP MODE RUNNING MODE
Sponsler V6.13 MS197
Run?
Set Computations?
Engineering Units?
Set Hardware?
Set Variables?
Clear Totalizer?
Check Alarm?
Lock/Unlock?
Real Time Clock?
Serial Interface?
Running...
Show Data?
Go To Standby?
Setup Data Display?
Setup Print List?
Print System Setup?
Clear Totalizer?
Examine Hardware?
Examine Comps?
Examine Variables?
Check Alarm?
Lock/Unlock?
When in this mode, the operating
parameters of the instrument may be set
up or changed
In either mode, check alarm, clear totalizer, or the lock may be accessed.
NOTE: Locking the unit in either mode prevents crossover to the other mode.
Setup
When in this mode, the operating parameters
may be examined, but no changes may be
19
3.1 FRONT PANEL KEYPAD OPERATION
SPONSLER CO., INC.
123
473
6
9
8
0
SP3000
A
B C D
0
9
DEC. PT.
CANCEL
BACKUP
ENT
CLR
Programming is accomplished via the 16 keys labeled and located on the front panel.
Sponsler V6.13 MS197
Run?
ADVANCE
BACKUP CANCEL DEC PT
A B C D
ENT CLR
The function of each key is described below:
ADVANCE
Advances to the next item in the menu or sub-menu. If the last item in the menu is displayed,
pressing this button will have no effect on the display. The display will not wrap around to the top
of the menu.
Backs up to the previous item on the menu or sub-menu. If the first item in the menu is displayed,
pressing this button will have no effect on the display. The display will not wrap around to the
bottom of the menu.
Cancels current operation and goes back to the top of the menu or sub-menu. From any point in
the menu structure, pressing “Cancel” twice will always return to Run? Or Show Data? Option.
Inserts a decimal point in the numerical value being entered.
THRU
Keys used to enter numbers. Numerical values appear from left to right as keys are pressed.
When entering numerical values, pressing this key will erase the last digit typed. If a previously
entered value is displayed, pressing this key will erase the entire value.
Enters a selection or displayed value. If a parameter prompt is displayed, pressing this key will
display the value presently in memory. If there is no default or previously stored value, an error
message will be displayed.
NOTE: The unit must be in the “Setup” mode to program or change operating parameters. On power up,
the unit will return to the mode in which it was operating when power was removed. If the unit was
operating in the “Running” mode, the unit will display operating data on the power up. To enter the “Setup”
mode:
20
DISPLAY SHOWS
the Top Level Menu
A
A
ENT
A
B
C
C
PRESS
Operating Data Scroll
Running...
Show Data?
Running...
Go to Standby?
Sponsler V6.13 MS197
Run? (This display indicates that the unit is in the
“Setup” mode. If the unit was in the “Setup” mode
when the power was removed, the unit will return
to this display on power up)
The function keys allow entry to the menus and sub-menus for selecting operating options or entering
numerical parameters.
Press
Press
Press
Press
Press
Press
Press
ENT
ENT
ENT
ENT
To advance a menu or sub-menu
To backup a menu or sub-menu
To access a menu or sub-menu
To select a displayed option. When an option has
been selected, the unit will autom atical l y advanc e to
the next menu item
To view the previously entered value at any data entry
point.
To erase the last digit typed or to erase a previously
entered value
To cancel current operation and return to the top of the
menu or sub-menu. From any point in the menu
structure, pressing twice will return to the top of
3.2 SETTING COMPUTATIONS
The computation selects the formulas that are used to process the raw input data into meaningful
information. Section 9 details the formulas used in each computation.
Flow Computation Selection and Applications
Ideal Gas – Volume: uses volume, temperature and pressure to yield a compensated
Volumetric flow rate displayed in SCFM (Nm3/h) and total in SCF
(Nm3)
Ideal Gas – Mass: uses volume, temperature to yield a compensated a Mass flow
rate displayed in lbm/h (kg/h) and total lbm (kg)
Steam Tables – Mass: uses volume and temperature and/or pressure to yield a
compensated Mass flow rate displayed in lbm/h (kg/h) and total in
lbm (kg). The unit may be set up to follow saturated steam curve;
see SPECIAL NOTE on page 3-9. (Steam tables are saturated 1
PSIA to 3200 PSIA with super heated values up to 900
o
F. Higher
temperatures cause an alarm condition).
Loading...