Honeywell ERX User Manual
Honeywell Process Solutions
ERX
Electronic Pressure Recorder
User Manual
October 2010
V 1.04
Honeywell
Revisions
1.02 07/16/07
Changed item 780 text to 790, missed labeled item
Edited item 792 description
Change item 789 default to No 09/13/07
1.03
Add Audit Trail & Display list 2 for P3 Voltage monitoring 12/07/07
1.04 Honeywell 10/2010
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Table of Contents
Introduction....................................................................................................................... 5
Warranty ........................................................................................................................... 6
Intrinsic Safety for Hazardous Locations....................................................................... 6
Warning.......................................................................................................................... 7
Modes of Operations......................................................................................................... 7
Sample Mode ................................................................................................................. 7
Display List Mode
.......................................................................................................... 7
Default Display Items and Live Enable....................................................................... 7
Serial Access Mode........................................................................................................ 8
Level 1...................................................
...................................................................... 8
Level 2......................................................................................................................... 8
Instrument Access ............................................................................................................. 9
How the ERX Recorder Works ............................................
........................................... 9
Pressure System ................................................................................................................ 9
Temperature System....................................................................................................... 11
Sample Interval .......................................................................................
........................ 11
Sample Interval Battery Life................................................................................... 11
Log Interval ..................................................................................................................... 11
Audit Trail ....................................................................................................................
... 12
Default Audit Trail Report Items .............................................................................. 12
Audit Trail Report Item 1-10.................................................................................. 12
Description of default Audit Trail items ................................................................... 12
Informational Display (LCD)...............................
.......................................................... 14
Installation and Operation of the ERX Recorder ........................................................ 15
Function Check............................................................................................................ 15
Instrument Setup.............................................................................................
............ 16
Instrument Configuration .......................................................................................... 16
Pressure .................................................................................................................... 16
Site IDs ......................................................................................................................... 16
Using Mas
terLink32 Software:...................................................................................... 17
• Date and Time ........................................................................................................... 17
• Sample Interval ......................................................................................................... 17
• Log Interval ............................
................................................................................... 17
• Start-of-Gas Day ....................................................................................................... 17
• Alarm Limits ................................................................................................................. 17
2-Point Pressure Calibration (Defined)......................
................................................... 18
2-Point Pressure Calibration (Gauge Transducers) .................................................... 18
2-point pressure calibration (procedure)...................................................................... 18
Two-Point Pressure Calibration (Absolute Transducers)........................................... 19
Two-point pressure calibration
(items required) ..................................................... 20
Two-point pressure calibration (procedure - absolute) ........................................... 20
Two-Point Temperature Calibration ............................................................................ 22
Alarm Pulses (Form-A) ................................................................................................
.. 23
Output Pulse Specifications............................................................................................ 23
Communicating to the ERX Recorder with a Modem ................................................ 24
Internal Modem Communications............................................................................. 24
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External Modem Communications without an External RS-232 Case Connector25
Internal or External Communications with a RS-232 Case Connector ................. 25
Automatic Call-In Feature ............................................................................................. 26
Alarm Call-In ............................................................................................................
...... 26
Pulse Method ................................................................................................................... 26
AT Commands Method .................................................................................................. 27
Scheduled Call-In Method.............................................................................................. 27
Alarm and Scheduled C
all-In ........................................................................................ 28
Modem Power Control--Call-out Window ................................................................... 28
30-Minute Window Interval ....................................................................................... 29
4-Hour Window Interval ............................................................
................................ 29
Multiple Windows- within the start and ending interval ........................................ 29
Digi-Span Fuel Switching Feature................................................................................. 31
Firmware Upgrade.......................................................................................................... 32
Procedure to Upgrade ERX Re
corder Firmware:....................................................... 32
Putting the ERX Recorder into “Shutdown” ............................................................... 35
Partial Shutdown......................................................................................................... 35
Complete Shutdown ...............................................................................
..................... 35
Taking the ERX Recorder “Un-Configured”............................................................... 36
Software method: ........................................................................................................ 36
Hardware method--if serial link cannot be established ........................................... 37
Parameter Item List..............................
.......................................................................... 38
Item Item Name & Description............................................................................... 38
P3 Pressure Coefficients....................................................................................... 38
Board Coefficients .................................................................................
.................. 38
P1 Pressure Coefficients................................................................................... 39
P2 Pressure Coefficients....................................................................................... 40
Board Coefficients ................................................................................................... 43
Audit Report Items-Default ........
................................................................................... 53
Pressure only default Audit Trail .............................................................................. 53
P3 Pressure Coefficients 1-26 ................................................................................ 54
ERX Hazardous and Non-Hazardous Installation Drawings ..................................
... 67
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Available Soon….
Introduction
Mercury Instruments ERX is a microprocessor-based, stand-alone, self-powered data recorder
that measures gas pressure(s), gas temperature, case temperature, and applied power supplies.
Sampled measurements, logged Audit Trail data, alarms, and operating parameters are stored in
non-volatile memory and may be retrieved directly with a laptop computer, Palm Pilot, Pocket
PC
, or remotely via modem. Pressure and Temperature, alarms, and other sampled parameters
may be displayed on an optional internal or external Alpha-Numeric LCD (Liquid Crystal
Display).
ERX Recorder is capable of sampling and recording up to three pressure transducers and ambient
and gas temperatures. At the time of manufacturing, the ERX may be fabricated as a wallmounted, pipe stand, or as a
Recorder (single pressure) or a Mini-AT (dual pressure) case.
Calibrating and serial accessing an ERX Recorder is accomplished by using Mercury
Instruments’ MasterLink32 version 3.50 or greater, Palm Suite, or Pocket PC software.
portable unit in an 800 series case, (three pressure default case) ERX
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MasterLink32 is a Window multifunctional software program that’s used to interface with an
ERX Recorder, via a serial cable, modem, or Bluetooth device.
MasterLink32 provides the following functions:
• Instrument configuration
• Date & Time
• Alarm limits
• Sample interval
• Log interval
• Audit Trail items (4 or 10 items)
• Display list (up to 18 displayable items)
• Units of mea
surement
• Pressure(s) and Temperature calibration
• Graph live pressure(s) or temperature
• Graph historical data retrieved for the ERX Recorder
• Audit Trail reports
• Serial Communications
• File management
• Instrument security
• See MasterLink32 ‘Help’ for additional functions and features
Warranty
Mercury instruments, Inc. warrants all instruments covered by this manual to be fr
ee from defects
in material and workmanship under normal use and service of this product. If returned to our
factory, transportation charges prepaid, within 4 years of the original purchase shipment date,
Mercury Instruments agrees to repair or replace any instrument, which its examination reveals to
have been defective due to faulty workmanship or material. All obligations or liabilities on
Mer
cury Instruments part is to repair or replace warranty instruments, and does not include any
other type of claims or damages, including but not limited to consequential damages following
the use of misuse of instruments sold by it. Mercury Instruments reserves the rights, at any time,
to make changes, modifications or enhancements to this product without prior notification. This
warranty is in l
ieu of all other warranties, express or implied. No agent is authorized to assume
for Mercury Instruments any liability except as set forth above
Intrinsic Safety for Hazardous Locations
Underwriter’s laboratories (UL) has listed the ERX Recorder as intrinsically safe for use in Class
I, Division 1, Group D hazardous locations and Canadian Standards Associations (CSA) for use
in Glass I, Divis
intrinsically safe instrument when installed in accordance with UL control drawing 40-3332 or
CSA control drawing 40-3332-A (see appendix).
ion 1, Groups C & D hazardous locations. The ERX Recorder is recognized as
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Warning
Use only Mercury Instruments manufactured battery packs with part numbers as specified
on the certification label or control drawing. Use of third-party battery packs voids
product warranty, voids intrinsic safety certifications and may impair safety.
Modes of Operations
The ERX Recorder is in one of three operating modes. Each mode is well defined and suited to a
particular purpos
Operating Modes:
• Sample
• Display list
• Serial
Sample Mode
While in the sample mode, the instrument obtains, stores and compares pressure(s),
temperature(s), and power supply voltage readings with alarm limit set points. If reading
exceeds the alarm limit set points, the instrument outputs a single pulse out the alarm
channel, display ‘ALARM’ or customer configured message on inst
with an LCD, and if equipped with a modem, jumps into either a modem configured callin sub-routine or an instrument call-in sub-routine.
Display List Mode
An LCD is required for display list mode operation. A push button is used to scroll
through the pre-programmed items. Display list mode contains two lists (display list 1 &
display list 2) and live readings (live enabled).
display list 2 up to twelve items. Any of the instrument items maybe programmed in
either list. Live-enable is determined by the instrument installed hardware, number of
pressure transducers and whether equipped with a temperature probe. While in display
mode operation, no changes are possible that will affect the configuration of the ERX
Recorder; i
e.
ruments equipped
Display list 1 can contain up to six items,
t will only display the pre-selected items.
Default Display Items and Live Enable
Instrument Configuration
Item
Code
P PP PPP PT PPT PPPT T
Display List 1 Items 1-6
530 580 580 580 580 580 580 580
531 582 582 582 582 582 582 582
532 583 583 583 583 583 583 583
533 503 503 503 503 503 503 503
534 521 521 521 521 521 521 521
535 255 255 255 255 255 255 255
Live Display Enable
536 P PP PPP PT PPT PPPT T
Display List 2 Items 1-12
537 631 631 631 631 631 631 635
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537 255 255 255 255 255 255 255
538 255 255 255 255 255 255 255
539 255 255 255 255 255 255 255
540 255 255 255 255 255 255 255
541 255 255 255 255 255 255 255
542 255 255 255 255 255 255 255
543 255 255 255 255 255 255 255
544 255 255 255 255 255 255 255
545 255 255 255 255 255 255 255
546 255 255 255 255 255 255 255
547 255 255 255 255 255 255 255
548 255 255 255 255 255 255 255
Serial Access Mode
Serial access requires a serial cable, modem, or a Bluetooth device along with
MasterLink32, Palm Pilot, or Pocket PC software. In addition, the instrument must be
equipped with the same type of serial hardware that is accessing the instrument. While in
this the mode the instrument may be configured, calibrated, or data can be retrieved from
the instrument. Serial accesses co
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538 637 637 638 637 638 638 645
539 638 638 632 638 632 632 646
540 632 632 640 632 640 640 636
541 639 640 633 639 633 633 647
542 640 670 642 640 642 642 648
543 651 633 634 635 634 634 657
544 650 641 644 645 644 644 656
545 649 642 426 646 635 426 655
546 255 634 428 636 646 428 255
547 255 644 429 647 636 429 255
548 255 673 431 648 648 431 255
Display List 2 Items 1-12 P3 with Voltage Monitor
nsist of two levels, level one and level two.
Level 1
Level 1 software access is considered a lower level access to the instrument and
software functions and is gained through the use of a laptop computer, Palm
Pilot, or Pocket PC and appropriate serial hardware connected to the instrument’s
serial port. The user must enter a five-digit code access code (default 11111) to
enter level one. Leve
instruments parameters and its functionality is control and configurable by Level
2 access.
Level 2
Level 2 software is the highest available level access and has access to all
instrument and software functions and is gained through the use of a laptop
computer, Palm Pilot, or Pocket PC and appropriate serial hardware connected to
the i
nstrument’s serial port. The user must enter a five-digit code access code
(default 22222) to enter level two.
l one is limited in its ability to change or configure the
Instrument Access
In addition, an instrument access code is necessary to maintain the instrument security and must
be entered or preprogrammed in appropriate software site list at the time of either successful level
one or level two serial links. Instrument default access code: 33333
How the ERX Recorder Works
The ERX Recorder utilizes a dedicated microprocessor in conjunction with precisi
on sensors to
measure gas pressure(s) and temperature(s) and records the measured values in memory. The
electronic circuits are powered by a battery pack located inside of recorder case or by an external
power source. The applied power regulated to voltages required by the connected circuits. While
in the sample mode, most of the electronic circuitry is in an un-powered state (sleep mode) to
co
nserve battery power. When an internal timer has reached the selected sample interval time,
the electronics are energized and a sample measurement cycle begins.
When the recorder wakes-up and enters the sample measurement mode, the programmable
firmware instructs the microprocessor to obtain analog measurements. The analog signals
(pressure(s), temperature(s) and power) are multiplexed through
the A/D converter and routed to
the microprocessor. The microprocessor converts and stores the digitized analog signals to an
equivalent numeric value, scaled to the selected engineering units. P1 pressure is stored in item
500; P2 pressure is stored in item 501; P3 pressure is stored in item 420; Gas temperature is
stored in item 502; Case temperature is stored in item 503: and power is stored
in item 521.
Once the all the measurements are obtained, the microprocessor compares the measured values to
the parameter limits already in memory, i.e., high and low limits of pressure(s), temperature,
power, etc; if any of the measured parameters are out-of-range, the firmware instructs the
microprocessor to jump into an alarm subroutine. The alarm subroutine activates the appropriate
alarm co
de item(s), turns on the alarm indicator, transmits an alarm pulse out the alarm channel
and if equipped, activates a call-in, via a Messenger modem, CDMA…etc.
If during a sample measurement cycle wake-up the power supply voltage falls below the low
limit set points, the microprocessor activates the alarm indicator, transmits an alarm pulse out the
alarm channel, and, if equipped, activates a mod
em call-in.
After the microprocessor has completed the sample measurement cycle wake-up, the
microprocessor will update memory, display the new samples data to the LCD, and return to the
‘sleep mode’ to conserve energy.
Other than time, the ERX Recorder will also wake-up due to either a serial link or push button
activation. A wake-up caused by a serial communication link allows the recorder
to
communicate with serial devices connected to J5 or through a COMS I/O port. A push button
activation access will cause the microprocessor to initiate the display list mode, as described on
page XXXXX. In all cases, the microprocessor will initiate a sample measurement cycle as
described earlier and continue to energize most circuits while the recorder is performing the userrequested tasks.
Pressure System
(1 to 5000 PSI)
The pressure-sensing system incorporates one, two or three precision strain gauge transducer. The
transducers are housed in the ERX Recorder case and exit the case via 1/1” NPT female
connector.
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Precision pressure transducers are characterized to 32 numeric points at the factory to determine
offset, linearity, repeatability, and hysteresis. The 32 points of characterization are unique to each
transducer and referred to as ‘Transducer Coefficients’. When replacing a transducer for any
reason, the coefficients must be reloaded with the proper coefficients for the replacement
transducer.
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Temperature System
-40 to 150 (-40 to 65C)
The temperature system consists of a highly stable solid-state transducer connected to the ERX
main circuit board through a 6-foot Teflon cable. The stainless steel probe is ¼” in diameter and
six inches in length; however, longer or shorter probe lengths are available options as well as an
armor cable. A ½” NPT nylon slip-along fitting is also provi
ded for securing the temperature
probe within the thermo well. The temperature probe assembly is universally interchangeable
between ERX Recorders and electronic volume correctors.
Sample Interval
In the ERX Recorder sample-measurement mode applies power to the electronic circuit so the
pressure(s), temperature(s), and power voltage measurements may be obtained. After obtaining
new measureme
nts, the item values and LCD are updated, and then compared to alarm limits, if
the values exceed the alarm limit, the instrument will jump to alarm sub-routine. After
completion of these tasks, the circuitry will return to the sleep mode of operation.
Sample rates: 1, 5, 10, 30, and 60 seconds, default is 10 seconds
Note: the faster the sample rate, the quicker battery powered instruments power
is depleted.
Sample Interval Battery Life
1 second 1 year
10 seconds 3 years
60 seconds 4 years
Log Interval
The log interval is a user-selectable item, its value determines how often Audit Trail report items
are stored into the instrument’s memory. The choices are 1, 5, 10, 15, 30, 60, or 24 hours, 60
minutes as the default. At the selected time interval, the recorder will automaticall
sample measurement wake-up cycle and store the user-defined Audit Trail report items into the
instrument’s memory. The time-stamped record placed in memory will be identified with the log
trigger “Time.”
Hourly and daily time triggers will always occur at the top of the hour, at 00: 00: 00 zero minutes
and seconds. For log triggers less than 60 minutes, time triggers will occur at 1,
minutes with zero seconds. Log triggers other than time will appear randomly and are placed in
memory at the exact time the incident occurred.
y enter a
5, 10, 15, or 30
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Audit Trail
The ERX Recorder is capable of storing either 4 or 10 items in its Audit Trail. Any of the
recorder items may be placed in the Audit Trail. Default: 10 Audit Trail Items
Interval 10 items 4 items
1 minute 3 days 6 days
5 minutes 17 “ 30 “
10 minutes 34 “ 60 “
15 minutes 50 “ 110 “
30 minutes 90 “ 150 “
60 minutes 180 “ 36
24 hours 1000 “ 2000 “
5 “
Default Audit Trail Report Items
Audit Trail Report Item 1-10
Item
Code
P PP PPP PT PPT PPPT T
589 500 500 500 651 651 651 657
590 651 651 651 650 650 650 656
591 650 650 650 649 649 649 655
592 649 649 649 670 670 654 678
593 672 501 501 657 654 653 689
594 681 654 654 656 653 652 677
595 671 653 653 655 652 421 687
596 679 652 652 676 655 655 521
597 503 503 421 503 673 673 255
598 521 521 521 521 521 521 255
Description of default Audit Trail items
Item Description Item Description
421 P3 Average Pressure 656 Temperature Interval High
500 P1 Pressure 657 Temperature Interval Low
501 P2 Pressure 670 P1 Current Day Average
503 Case Temperature 671 P1 Current Day High
521 Battery Voltage 672 P1 Current Day Low
649 P1 Interval Average 673 P2 Current Day Average
650 P1 Interval High
651 P1 Interval Low 677 Temperature Current Day High
652 P2 Interval Average 678 Temperature Current Day Low
653 P2 Interval High 687 Temperature Current Day High
654 P2 Interval Low 681 P1 Current Day Low Time
655 Temperature Interval Average 687 P1 Current Day High Time
676 Temperature Current Day Average
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Default Audit Trail with P3 Voltage Monitor
Audit Trail Report Item 1-10
589 500 501 500 500 501 651 657
590 651 654 651 651 654 650 656
591 650 653 650 650 653 649 655
592 649 652 649 652 652 654 423
593 423 423 501 423 423 653 423
594 422 422 654 421 421 652 422
595 421 421 653 502 502 423 421
596 503 503 652 651 651 651 503
597 255 255 423 657 657 657 255
598 255 255 503 503 503 503 255
Description of default Audit Trail items
Item Description Item Description
421 P3 Average Pressure 656 Temperature Interval High
422 P3 Interval High
423 P3 Interval Low
500 P1 Pressure 657 Temperature Interval Low
501 P2 Pressure 670 P1 Current Day Average
503 Case Temperature 671 P1 Current Day High
521 Battery Voltage 672 P1 Current Day Low
649 P1 Interval Average 673 P2
650 P1 Interval High 676 Temperature Current Day Average
651 P1 Interval Low 677 Temperature Current Day High
652 P2 Interval Average 678 Temperature Current Day Low
653 P2 Interval High 687 Temperature Current Day High
654 P2 Interval Low 681 P1 Current Day Low Time
655 Temperature Interval Average 687 P1 Current Day High Time
Current Day Average
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Informational Display (LCD)
A single 8-digit alphanumeric display (LCD) is a standard feature of the ERX. The LCD may be
mounted externally without a window cover, externally with a window cover, or internally. A
LCD is required for viewing the display lists 1 & 2 data and live readings. Normally the
instrument is in the sample measurement mode and the LCD displays the primary transducer (P1)
last sampled pressure, default setup. The default item (P1) displayed while in the sample mode
may be changed by changing the item entered in item 482, e.g. P2, P3, or etc. When activated by
a push button function, the LCD will display any alarm conditions, display list 1 & 2, and live
pressure(s) and temperature. If an instrument is in an alarm condition, the LCD will display
‘ALARM’ or a user
that’s entered in item 483 can contain any alphanumeric character, but is limited to eight
characters.
-defined message, control by what is entered in item 483. The alarm message
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Installation and Operation of the ERX Recorder
Upon receiving the recorder, be sure that all items received are in good condition. Check the
packing list to make sure the shipment is complete. Report to your Mercury Representative any
damages and immediately file any shipping damage claims with the carrier who delivered the
shipment.
Function Check
1. Open the case door, check for any loo
seated.
2. • Ensure Super Cap jumper is installed onto both pins of J1
3. • Remove Velcro strap that secures the Alkaline Receptacle Battery Pack (default battery
pack)
4. • Remove battery pack; open the cover by pulling on the Velcro tab underneath pack
5. • Install four alkaline D-cell batteries, observe polarity, secure cover and replace
pack in the recorder, then secure with Velcro strap.
6. • Attach battery pack lead to either J3 or J4; J3 and J4 are parallel.
J1 Super Cap Jumper
Super Cap
Battery Velcro Strap J3 J4
se parts, and verify that all connectors are properly
battery
P1 P2 P3
15
The LCD should display a pressure reading of close to ‘0.00. The recorder is now ready for
functional checks.
*Note: All of the function checks assume that the instrument has been configured with a
default setup.
Use the MI Logo (push button) or an optionally installed push button to scroll through the display
list(s) and stop at the live pressure reading. Without having made a pressure connec
will display a value very close to zero, typically, within +/- 0.4% of full scale.
Connect a pressure source to the external ¼” NPT pressure connector, apply a varying pressure
(less than full scale) and observe an increase or decease in the LCD’s reading as the pressure
varies. An automatic ten-minute time-out ensures that if a recorder left in a live reading, the
recorder will r
scroll through the remaining display list items until the recorder has returned to the sample
measurement mode.
eturn to the sample measurement mode to conserve battery power. Continue to
tion, the LCD
Instrument Setup
The following items are critical in the recorder’s operation and proper configuration.
Instrument Configuration
Item 576 configures what the recorder will record, that is, pressure(s) and te
equipped, e.g. P, PP, PPP, PT, or PPPT.
mperature data, if
Pressure
Transducer
Pressure (P1) 570
Pressure (P2) 571
Pressure (P3) 412
605~630
Temperature 551
Range
Xducer
Range Unit Coefficients
572
573
419
549 301~332 178~181
550 341~372 441~444
408 150~155 445~448
Board
Coefficients
Site IDs
Site identification items 580 and 581, used to identify the recorder to the associated software.
Items 580 and 581 Site IDs are preprogrammed using the recorder’s serial number, set by the
factory prior to shipping, but may be changed to meet company’s requirement. Site IDs must
remain unique, that is, no tw
o recorders should have the same Site ID numbers.
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Using MasterLink32 Software:
• Date and Time
Instrument Set Inst. Date/Time via computer, ensure date and time is correct in the computer
before setting date and time via computer.
Or
Manually set time by entering the time in item 582
Manually set the date by entering the date in item 583
• Sample Interval
Item 586
• Log Interval
Item 585
• Start-of-Gas Day
Item 587
• Alarm Limits
Low Limit High Limit Low/Low High/High
Pressure (P1) 554 553 814 813
Pressure (P2) 556 555 818 817
Pressure (P3) 452 451 808 807
Temperature 564 563
Battery 565
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2-Point Pressure Calibration (Defined)
A 2-Point Pressure Calibration requires that two different pressures be applied to the instrument’s
pressure transducer and be sampled by the data acquisition circuits. A low pressure value,
usually 0.00 PSI, is applied to determine the Pressure Zero Calibration (offset). A higher pressure
value is applied to determine the Pressure Span Calibration (gain
). The default Calibration
Parameters require that the Span Pressure exceeds the Zero Pressure by at least 50% of the
transducer range, otherwise a “Points Too Close” error message is displayed.
To produce a linear pressure response for all rated pressures and temperatures, each transducer
has been factory characterized for ambient temperature effects. The characterization process
determines th
e proper compensation coefficients for each transducer. The 2-point calibration
process uses the coefficients when calculating the pressure offset and pressure span values. Once
these two points have been calculated and stored in the instrument’s memory, all other applied
pressures and temperature are automatically compensated by the coefficients.
2-Point Pressure Calibration (Gauge Transducers)
2-point pressure calibration (items required)
• ERX Recorder
• Pressure source and fittings (capable of providing pressures of at least 50% of the ERX
pressure transducer range)
• Pressure Reference (accuracy to equal or exceed the accuracy of the ERX pressure
system)
• Computer (IBM Compatible)
• MasterLink32 Software
• I/O cable, part number 40-1629 and a MPA, part number 40-2
620 or through the use
of I/O cable, part number 40-1629 only if the instrument is equipped with an external
case connector and a third option is through the use of I/O cable 40-2696 that connects
directly to J5 on the main circuit board.
2-point pressure calibration (procedure)
Make certain that the Pressure Compensation Coefficients listed are for the pressure transducer
installed. Also verify that Item Code 087 is
transducer serial number label and item 112 is set for Gauge type transducer. Since the two-point
calibration is mostly a software function, references to the appropriate sections in the
MasterLink32 Link software are included.
1. Connect the pressure source and pressure reference to the ERX pressure connector.
2. Make a serial connect from t
he computer’s serial port to the ERX serial port.
3. Start MasterLink32 software on the computer.
4. Enter the access code for Level 1 or Level 2 when requested. The default Level 1 Access
Code is “11111”, the default Level 2 Access Code is “22222”.
5. If a communications link has not yet been established, the screen will display a box
requesting the user to input the Instrument Access Code. Ent
box appears. The default code is “33333”
the desired pressure unit. Item Code 138 matches the
er the access code when this
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6. Select “Calibrate” from the main menu.
7. Select “Pressure Calibration” from the sub-menu.
8. With zero pressure applied to the ERX pressure transducer, perform the “Pressure Zero
Calibration.” The pressure displayed in green on the computer’s screen is a live reading.
This permits the user to determine if the pressure has stabilized so that a sample may be
obtained. Click the AVERAGE PRES
SURE NOW button when it becomes active (text
changes from gray to black) to obtain a sample of the applied pressure.
9. When MasterLink32 displays “Average Pressure”, the value should be changed to match
the pressure reference by clicking the CHANGE button when it becomes active. Enter
the pressure value for the zero reference pressure (usually 0.00). The ERX will calculate
the required differe
nce offset, store this calculated value within the instrument before
returning to a live pressure reading.
10. Compare the displayed pressure to the reference pressure. If the ERX pressure reading is
not acceptable, click the AVERAGE PRESSURE NOW button again to obtain another
pressure sample. The program will continue to loop back to the live pressure reading.
Obtain as many pressure samples a
s necessary until an acceptable pressure reading is
displayed.
11. If the ERX zero pressure reading is acceptable, click the SPAN button to change to the
Span Calibration sequence.
12. The screen title should have changed to “Pressure Span Calibration.” At this point, the
software is waiting to sample the applied pressure. Increase the pressure applied to the
ERX to the span reference pressure.
This must be greater than 50% of the transducer
range.
Example #1: If the zero reference pressure on a 100 PSI transducer equals 0.00 PSI, then
the span reference pressure must be between 50.00 and 100.00 PSI.
Example #2: If the zero reference pressure on a 600 PSI transducer equals 0.00 PSI, then
the span reference pressure must be between 300.00 and 600.00 PSI.
13. The span calibration a
lso displays a live pressure reading to allow the user to determine if
the span reference pressure has stabilized. When the pressure has stabilized, click the
AVERAGE PRESSURE NOW button when it becomes active to obtain a pressure
sample.
14. If the average pressure reading is not equal to the span reference pressure, click the
CHANGE button when it becomes active. Enter the pressure value for t
he span reference
pressure. As the computer screen updates, the ERX will calculate the required span gain,
store this calculated value within the instrument before returning to a live pressure
reading. Obtain as many pressure samples as necessary until an acceptable span pressure
reading is displayed.
15) Compare the average pressure reading to the span reference pressure. If the average
pressu
re reading is acceptable, the pressure calibration process is complete. As a
suggestion, recheck the pressure zero reading and any number of pressure points within
the transducer range, or click DONE to exit the calibration sequence.
Two-Point Pressure Calibration (Absolute Transducers)
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Two-point pressure calibration (items required)
• ERX
• Pressure Source and fittings (capable of providing pressures of at least 50% of the ERX
pressure transducer range)
• Pressure Reference (accuracy to equal or exceed the accuracy of the ERX pressure system)
• Computer (IBM Compatible)
• I/O cable, part number 40-1629 and a MPA, part number 40-2620 or through the use of
I/O cable, part n
umber 40-1629 only if the instrument is equipped with an external case
connector and a third option is through the use of I/O cable 40-2696 that connects directly to
J5 on the main circuit board.
• Barometer
Two-point pressure calibration (procedure - absolute)
Make certain that the Pressure Compensation Coefficients loaded in the instrument are for the
pressure transducer installed. Also ve
Since the two-point calibration is mostly a software function, references to the appropriate
sections in the MasterLink32 software are included.
1. Connect the pressure source and pressure reference to the ERX pressure connector.
2. Make a serial connect from the computer’s serial port to the ERX serial port.
3. Start MasterLink32 softw
4. Enter the access code for Level 1 or Level 2 when requested. The default Level 1 Access
Code is “11111”, the default Level 2 Access Code is “22222”.
5. If a communications link has not yet been established, the screen will display a box
requesting the user to input the Instrument Access Code. Enter the access code when this
box appears. The default code is “33333”.
6. Se
lect “Calibrate” from the main menu.
7. Select “Pressure Calibration” from the sub-menu.
8. With zero pressure applied to the ERX pressure transducer, perform the “Pressure Zero
Calibration.” The pressure displayed in green on the computer’s screen is a live reading.
This permits the user to determine if the pressure has stabilized so that a sample may be
obtained. Click the AVERAGE PRESSURE NO
changes from gray to black) to obtain a sample of the applied pressure.
9. Obtain the current local atmospheric pressure reading using a barometer or by some other
means. When MasterLink32 displays “Average Pressure”, the value should be changed
to match the current atmospheric pressure value by clicking the CHANGE button when it
becomes active. Enter the c
comparable, i.e., PSIA. The ERX will calculate the required difference offset, store this
calculated value within the instrument before returning to a live absolute pressure
reading.
10. Compare the displayed pressure to the reference pressure. If the ERX absolute pressure
reading is not acceptable, click the AVERAGE PRESSURE NOW butt
another pressure sample. The program will continue to loop back to the live pressure
reading. Obtain as many pressure samples as necessary until an acceptable pressure
reading is displayed.
11. If the ERX absolute pressure reading is acceptable, click the SPAN button to change to
the Span Calibration sequence.
12. The screen title should have changed to “Pressure Span Calibrat
software is waiting to sample the applied pressure. Increase the pressure applied to the
ERX Recorder to the span reference pressure that exceeds the zero reference pressure by
at least 50% of the rated transducer range.
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rify that instrument is setup for the desired pressure unit.
are on the computer.
W button when it becomes active (text
urrent atmospheric pressure value, making sure the units are
on again to obtain
ion.” At this point, the
Example #1: If the zero reference pressure on a 100 PSIA transducer equals 14.73 PSIA,
then the span reference pressure must be between 64.73 and 100.00 PSI.
Example #2: If the zero reference pressure on a 100 PSIA transducer equals 13.25 PSIA,
then the span reference pressure must be between 63.25 and 100.00 PSI.
Example #3: If the zero reference pressure on a 600 PSIA transducer equals
14.73 PSIA,
then the span reference pressure must be between 314.73 and 600.00 PSI.
13. The span calibration also displays a live pressure reading to allow the user to determine if
the span reference pressure has stabilized. When the absolute pressure has stabilized,
click the AVERAGE PRESSURE NOW button when it becomes active to obtain a
pressure sample.
NOTE: The span reference pressure is
equal to the sum of the dead weight tester
pressure, and the atmospheric pressure obtained in step 9 above.
14. If the average pressure reading is not equal to the span reference pressure, click the
CHANGE button when it becomes active. Enter the pressure value for the span reference
pressure. As the computer screen updates, the ERX will calculate the required span gain,
and store this calculat
ed value within the instrument before returning to a live pressure
reading. Obtain as many pressure samples as necessary until an acceptable span pressure
reading is displayed.
15. Compare the average, absolute pressure reading to the span reference pressure. If the
average pressure reading is equal to the sum of the applied pressure plus the atmospheric
pressure, the pressure calibration proces
s is complete. As a suggestion, recheck the
pressure zero reading and any number of pressure points within the transducer range, or
click DONE to exit the calibration sequence.
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Two-Point Temperature Calibration
A Two-point Temperature Calibration requires that two different temperatures be applied to the
instrument's temperature probe and be sampled by the data acquisition circuits. A low
temperature source, usually a 32 degrees F ice bath is used to determine the Temperature Zero
Calibration. A higher temperature source is used to determine the Temperature Span Ca
(gain). The default calibration parameters require the Span Temperature exceed the Zero
Temperature by at least 15% of the instrument temperature range.
The temperature probe provides a nonlinear, but very predictable temperature response for all
rated temperatures. The instrument's firmware chip contains the required information to produce
a linear temperature response for any connec
ted temperature probe. The Two-Point Calibration
process uses the temperature offset and temperature span values to adjust for individual
variations. Once these two points have been calculated and stored in memory, all other applied
temperatures can be determined by a linear interpolation.
libration
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Alarm Pulses (Form-A)
The alarm output pulse is available as a Form-A output only. The alarm output pulse width is
fixed at 50 mS and there is no need for pulse scaling. An alarm pulse output is a one-time
occurrence, at the time any alarm becomes active. Subsequent alarm pulses will not occur until
all previous alarms have been cleared.
Output Pulse Specifications
1.
2. Outputs are rated for DC only, from 3.0 volts to 10.0 volts. Observe polarity.
3. The alarm output will sink up to 5 mA. Pulse duration is 50 mS minimum.
4. Form-A contact closures are between the A- and A+ terminals. The contact closures are
All outputs are isolated from ground and each other.
held for 50 mS. Note: Observe polarity.
Note: A- and A+ output channel is also used to power (on/off) an internal
communication devices, i.e. cellular phones, modem, radio...etc.
or external
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Communicating to the ERX Recorder with a Modem
The ERX Recorder has a single I/O serial port that is used for local serial connections and for
modem connections. The I/O serial port baud rate is controlled by item 588, is set to “Auto baud”
and automatically adjusts from the 38400, the starting baud rate to match the baud rate of
connecting serial device. However, it is highly recommended when
communicating with the
recorder via a modem to adjust item 588 (serial baud) to match the baud rate of the connecting
modem’s RS-232 port. The serial port will support the following lines: TX, RX, and COM,
Internal Modem Communications
Mercury Instruments manufactures a low power modem designed to be installed within the case
of the ERX Recorder, the Messenger Modem. The Messenger Modem can
ERX via a ribbon cable, which is used for internal Messenger Modem installations that do not
have an external case connector. See Messenger Modem manual for additional information.
communicate with the
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Pin1
RS-232 to CMOS I/O port, use to connect serially to the recorder
using an IBM compatible computer or PDA and a communication cable 40-2696-1 technician
cable.
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External Modem Communications without an External RS-232 Case Connector
Requires the use of an optional RS-232 to CMOS I/O Board, 40-2717-2:
See Messenger Modem manual for additional information.
Internal or External Communications with a RS-232 Case Connector
Requires the use of an optional RS-232 to CMOS I/O Board with shorting plug, 40-2717-3:
(Shorting plug not shown)
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External Modem Communications with a RS-232 CMOS I/O Board with shorting plug and
stripped wires, 40-2717-8, same as 40-2717-3 but instead of three stripped wires it has a terminal
block to facilitate external modem connection.
Automatic Call-In Feature
Alarm Call-In
Pulse Method
The ERX Recorder has the capability to initiate a modem-to-modem call. There are two
circumstances where the ERX Recorder will initiate a call, Alarm Call-In and a Schedule Call-In.
The Alarm Call-In feature can be configured to call in two ways: 1is to use the alarm pulse output
of the ERX Recorder to trigger the automatic call-in featur
alarm condition has been detected by the recorder, the recorder will generate an alarm pulse, that
will cause the MI Modem to jump into an alarm subroutine that has been pre-programmed in the
MI Modem program.
To use this method, set the following items:
Item Code Set to
333 Call-In Trigger 1 Alarm Call-In
484 Alarm Channel Control 0 Alarm Pulse Out
789 Modem AT Enable 0 Call-In via Alarm Pulse
Note: The MI Modem must be configured properly for this method to work; see MI Modem
installation guide for more information.
e of the MI Modem. Once and an
put
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