Thank you for choosing the nVision Reference Recorder from Crystal Engineering Corporation. The philosophy behind nVision:
nVision lets you visualize measurements graphically, with or without a pc, in real time as it is being recorded. It is much easier to identify trends or anomalies
visually, than in tables of data or spreadsheets.
nVision is tremendously exible and can be congured to measure and record a variety of combinations of measurements. In addition to pressure, modules
for temperature, voltage and current can be used.
Because all of these inputs can be displayed individually as numbers or as graphs, or in combination with other inputs (numerically and graphically) we also
provide a way to simplify nVision, so you can limit the available screens to only those that are of use to your specic task.
Accuracy is up to 0.025 percent of reading
temperature compensated
The nVision features two identical bays allowing conguration of the reference recorder to meet your requirements. All modules are eld-replaceable allowing
you the exibility to react to changing needs and module calibration requirements.
The nVision’s case is made from a rugged injection molded polymer utilizing a gasket to seal the enclosure against dust and water intrusion. Even the mini
USB B connector is fully sealed (with or without the protective boot cover). Circuitry is mounted in a shock-absorbing elastomeric system and the batteries are
easily accessible by removing four captive screws.
Other features include:
Log and display 500,000 points at up to 10 readings per second on up to two modules simultaneously
•
Interactive real-time graphing of measurements
•
ATEX / IECEx Scheme intrinsically safe
•
IP67 rated enclosure —1 meter immersion for 30 minutes
•
Uses Crystal’s CPF ttings and hose system (leak-free and nger-tight to 10 000 psi (700 bar))
•
– so there is no change in accuracy throughout the entire operating temperature range!
– so any nVision can typically replace several gauges or calibrators you may have been using. The nVision is fully
U.S. Patent No. 8,794,677
Overview 1
Crystal Engineer
calibrators, MultiCal multimeter pressure modules, and a variety of industry specic pressure measuring equipment.
Crystal Engineering pioneered features like full temperature compensation and “of reading” rated gauges and calibrators. Pressure measuring equipment is
the only thing we do and that’s why we say:
Press and hold the (power) button for 1 second to turn the nVision on or o. The nVision will automatically power down if not used for the time period
dened in CrystalControl.
Automatic Shuto - Low Power Mode
seconds to “always on.” During a recording, the nVision will enter Low Power Mode instead of shutting o.
When power
CrystalControl.
During a recording with a Logging Interval of 1 reading/minute or slower, your nVision will enter Ultra-Low Power Mode after the rst reading elapses and the
Automatic Shuto Timer runs out.
The Backlight Shuto is set separately in CrystalControl. It is unaected by other settings.
MEASUREMENTS & RECORDING
Recording
The nVision can record at rates from 10 readings per second to 1 reading per hour as set in CrystalControl. Adjust your recording rate to optimize battery life
and data recording space.
number doubles. CrystalControl will give you a more accurate view of recording times based on the logging rate and enabled screens for your nVision.
When connected to CrystalControl you can congure, control, and graph an nVision recording directly from your PC, without handling the nVision chassis.
To start or stop a recording run from any screen:
1 Press the
Note:
2 The red LED will start ashing when the recording begins.
3 To stop recording, press the
Note:
Adjust your Automatic Shuto time (shut o time in absence of key press) to optimize battery life.This feature is adjustable from 30
ed by USB, the nVision does not employ any power management strategies.
Your nVision is capable of recording more than 500,000 data points when both module bays are populated. With one bay populated, this
Therefore, it will not automatically shut o to the settings dened by
(record) button for one second.
You may be prompted to enter a Run Tag, if enabled. For more information, see Run Tags.
(record) button again. The red LED will ash twice.
data for the upper module will still record if any of the screens for that module are enabled. Use CrystalControl to check which data screens are enabled.
The nVision records data for all screens enabled in Crystal Control. Even if you are viewing data for the lower module numerical display,
Press the (zero) button for at least 1 second while vented to atmosphere until the dashed lines (- - - - -) appear.
•
To clear the zero value:
Hold the (zero) button for 5 seconds until the display changes from (- - - - -) to the zeroed value, then to (- - -).
•
entirely, by setting the zero value to a negative number less than -15 psi.
Note: If you attempt to zero the gauge with more pressure applied than the Zero Limit set in with CrystalControl, the command will be ignored, and “- -HI- -”
Note: You can never zero the BARO sensor.
WARNING: This gauge can display zero pressure when connected to a source of pressure! Do not rely on the display indication before disconnecting—
!
You can adjust the Zero Limit at which the (zero) button will display “- -HI- -” inCrystalControl.You can also disable the (zero) button
will display.
it may not be indicating true pressure. Never disconnect pressure instrumentation without rst relieving system pressure!
displayed regardless of
cursor location or zoom level
Left y-axis indicates the scale of the
lower module. Right y-axis indicates
the scale of the upper module
Date and Time
Stamping
Pressure module reading
BARO module reading
Displays barometric pressure from
BARO module vs. output from one
pressure module (Upper or Lower)
nVision Operation Manual
GRAPHING
Navigating the Graphical Display
In the graphical modes the nVision navipad enables you to control how you view your data. The ( ) & () keys allow you to navigate to
specic points along your run, while displaying reading and time information. The
recorded run to suit your needs.
() & () keys allow you to zoom in and out of your
Panning Across the Data Set
To inspect the latest or current data recording, use the ( ) & () keys to move the cursor within the display window. During live recording, data streams
from the right side of graphical display screens. Therefore, the most recent data will always appear on the far right of the display.
Cursor location
Live recording area
Zooming in on Specic Data
To see more detail on the latest or current data recording, you may zoom in or out on your cursor.
1 Use the
() and () arrows to zoom in or out in any graphical display, during or after recording.
2 To return to the fully zoomed out view (viewing the complete run) simply hold the
Normal View Zoom View
() arrow for 5 seconds, or until you are completely zoomed out.
When zoomed in, small arrows appear on
the horizontal time bar.
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nVision Operation Manual
AVERAGING MODE
Averaging mode reports the average reading during the recorded run. If this screen is enabled, data displayed here represents the average of all past data
points, over the duration of a recording. The start date and time, duration of the recorded run, and the live reading are displayed.
nVision calculates averages as follows:
r
+r2 +r
1
r
n
n
Averaging Mode
DIFFERENTIAL MODE
The nVision automatically displays numerical and graphical dierential screens if two similar module types are installed. ΔP becomes available if your nVision
is populated with two PM modules. ΔT becomes available if your nVision is populated with two RTD100 modules.
In the case of the pressure modules (PM), this mode does not require them to be the same full scale range.
WARNING: Two MA20 modules cannot be installed at once. This conguration may permanently damage your nVision.
!
In Dierential Mode the ΔP or ΔT represents a ltered reading of the upper module – lower module + tare reading.
...+r
3
n
n
current reading
=
total number of readings
=
Filtered live reading of upper module
Filtered live reading of lower module
Tare value equalizes the upper and lower modules
Functions 7
Dierential Mode
The units selected for this view are independent of the units selected for the other screens such as the Numerical or Graphical views. Data viewed in the
Graphical screens will represent the data acquired from either module and not represent the specialized view of the Dierential Mode.
Note: To change the displayed units on any Dierential Display, see the Units section.
Using the Tare function improves your dierential measurement uncertainty signicantly if used properly. The Tare function equalizes (normalizes) the nVision’s two modules at a non-ambient datum. The Tare reading displays the same units as the main ΔP or ΔT reading.
If you apply the same static line pr
to the allowable error tolerance for each module, the reading may not be zero. The Tare function allows you to normalize both readings so that the dierential
reading is zero. This gives you a more accurate dierential reading than if this process were not completed.
Note: Tare should be reestablished every time your measurement conditions change, including vent condition. For instance if your ΔP reading has 8 inH20 of
Tare at 1500 psi static, when you return to vent condition this 8 inH20 of Tare will remain in place on your ΔP reading until cleared with the Tare button.
To Tare:
1 Use the (next) button to select the Dierential Mode Numerical Screen.
2 Press the
3 To clear the Tare value in the Dierential Mode, hold the button for 3 seconds until the main display readings change from (- - - - -) to (- - -).
RUN TAGS
The Run Tags you choose will display in CrystalControl's DataViewer and your downloaded data.
To use Run Tags:
(zero) button until the display ashes dashed lines (- - - - -).
Run Tags are 22 character identiers you can enter to name each data run. They are enabled by selecting the Enable Run Tags checkbox.
essure, temperature, or resistance signal to both sensors simultaneously, you should have a dierential reading of zero. Due
1 Press (record) from any screen. A QWERTY keyboard will appear, giving you the option to add your Run Tag.
() , () , () , and ( ) arrows and the (select) button to edit your Run Tag on the QWER TY keyboard.
2 Use the
3 Press the
Your recording will begin immediately.
(next) button, or move to the onscreen checkbox and press the (select) button.
Functions 8
You can also enter up to ve predened Run Tags when the Predened Run Tags box is checked.
1 Press
(record) from any screen.
() , () arrows and the (select) button to choose a Run Tag from the list.
2 Use the
() , () , () , and ( ) arrows and the (select) button to edit your Run Tag on the QWER TY keyboard.
3 Use the
4 Press the
Your recording will begin immediately.
Note: If you enable Run Tags in CrystalControl, you will be prompted to select a Run Tag prior to every recording. You can also see your Run Tag info through
the setup button during a recording. See View the current Run Tag during a recording for instructions.
(next) button, or move to the onscreen checkbox and press the (select) button.
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nVision Operation Manual
Chassis
CHASSIS CONTROLS
Setup Button
Pressing the (setup) button brings up a selectable menu including Clear Peaks, Units, Settings, Summary, and Recording.On the (navipad), use the
() and () arrows to move to the desired feature and use the (select) button or ( ) and () arrows to move into the desired function.
The nVision Setup menu
Clear Peaks (Resetting Hi and Lo Peaks)
Note: Dashed lines will briey appear across the peak value indicators. Clearing the peaks will not aect the zero values or the Filter value.
Units
Selecting Units allows you to change the displayed units on any screen. See the module specications in the Modules section for a list of available units. With
a BARO module installed, you can switch between absolute and gauge pressure. On the Dierential Mode screen, you can switch the units of the dierential
measurement. When you change the displayed units for a module, the units for that module will change in every screen—except Dierential Mode.
Note:
CrystalControl will be available in CrystalControl’s DataViewer.
The unit displayed at the beginning of a recording run remains the default unit for that run. All other units enabled in
The Screen Lock Password feature will also be found in Settings, if enabled in CrystalControl.Prevent access to your nVision by protecting
CrystalControl.
(100%)
(75%)
Chassis 11
(50%)
To unlock the nVision, simply enter the 4 digit password with the arrow keys and press the (select) button. The correct password will allow you back into
standard nVision operation.
Note: In the event you lose the password, you will need to contact the factory for an unlock code, which will remove the password protection.
An invalid code will reject your attempt and allow you to enter another password.
Press the (record) button until the red LED indicator ashes.
View the current Run Tag during a recording
Erase All Runs
A conrmation screen will ask, Are You Sure?. Press (select) to continue and erase all the data runs on this nVision. Press the (back) button to cancel.
CAUTION: Never remove power (either battery or USB) during the erasing process.
!
Chassis 13
SERIAL NUMBERS
All serial numbers can be viewed using the nVision Summary screens or in CrystalControl.
Each product has a maximum of four serial numbers, one for the chassis and one for each of the modules (upper, lower, and BARO). Chassis serial numbers are
located in the power bay. Module serial numbers are located on the module and can also be viewed in the power bay of the Reference Recorder. Serial Numbers consist of 6 numbers, with the left most digit representing the year of manufacture. For example: 937834 was manufactured during 2009.
nVision under USB power consumes less than 100 mA.
WARNING: The mini USB B connector shall not be used within the hazardous atmosphere. It shall
!
SELV and PELV denitions per IEC60079-11 ar
Safety extra-low voltage (SELV): Extra-low voltage system (i.e. normally not exceeding 50 VAC or 120
V ripple-free DC) electrically separated from earth and from other systems in such a way that a single
fault cannot give rise to an electrical shock.
Protective extra-low voltage (PELV): Extra-low voltage system which is not electrically separated from earth but which otherwise satises the requirements
for SELV.
Note:
be used in the non-hazardous atmosphere with either “Safety Extra Low Voltage
Circuits” (SELV ) or “Protective Extra Low Voltage Circuits” (PELV). The USB connector
has a Um of 6V
.
e:
A 50V center-tapped earth system is a PELV system.
The nVision enclosure
178
[7.08]
204
8.05
MAXIMUM
WITH TWO
PRESSURE
MODULES
PRESSURE MODULE (PM) SHOWN
CRYSTAL CPF SYSTEM:
MEDIUM PRESSURE FEMALE (MPF)
(1/4" MEDIUM PRESSURE
WITH 7/16"-20 INTERNAL THREADS)
TUBE SYSTEM
25
1.00
SENSOR
DIAPHRAGM
SURFACE
Mounting
Permanent Mounting . . . . . . . . . . . .four M4 x 0.7 threaded inserts: 8mm deep (see drawing for location)
Enclosure
Impact resistant injection molded housing and elastomeric protective boot compatible with common industrial uids, including Skydrol.
Weight: 680g (1.5 lbs) including one each PM and RTD100 module, 4AA battery module, and protective boot.
The nVision’s upper and lower bays allow for removal of modules in the eld. All module changes should be completed in a dry, clean environment, indoors.
Proper electrostatic discharge (ESD) grounding techniques should be taken into account prior to the module change over. If you’re removing a module without installing a replacement, a blank plate (P/N: BNKPLT) must be installed to ensure your IP67 rating and to protect the product.
WARNING: Do not install two MA20 modules simultaneously. Permanent damage may occur.
!
CAUTION: Do not proceed unless you have a suitable replacement module or blank plate for the module bay in question.
!
Note: Follow these steps to change modules.
1
CrystalControl.
2 Clean exterior of nVision, if necessary, to ensure no moisture or foreign matter will enter the enclosure when disassembled.
3 Power o nVision and remove any existing power or USB connections.
WARNING: Failure to disconnect nVision from 4AA, USB, or AC power before module removal or installation may cause damage.
!
4
Loosen the four T10 Torx screws retaining the module face plate and carefully pull the module straight out of the chassis (avoid twisting). Make note of the
orientation of module connector (located closest toward the display) in relation to the nVision chassis.
Note: Please ensure that the module's o-ring is also removed with the module.
Before removing or replacing any modules, ensure that all recorded data has been archived properly through the use of Export Data in
Modules 15
(4x)
Note:
Due the physical form and the IP67 sealing strategy employed, some modules may be dicult to remove. If necessary, connect a tting or RTD cable to
the appropriate module to aid in module removal. Never force the separation of a module from an nVision chassis.
5 Install a new module in the same orientation as the one removed in step 4. The tri-lobe design of the module will not allow improper installation; do not
force installation of the module as permanent damage may occur. To ensure an IP67 rated seal, lightly lubricate the module’s o-ring (P/N: 4110) with Dow
111 silicon lubricant or equivalent.
(4x)
Lightly lubricate the o-ring, then install the module in the proper orientation.
Note: If installing a Blank Plate, conrm orientation is at and even within the module bay for proper sealing.
6 Tighten face plate T10 Torx screws to 50 in-oz (0.35 newton meter (N-m)) torque.
7
Replace power module/plug and tighten to 50 in-oz (0.35 newton meter (N-m)) torque to ensure IP67 seal. When power is rst applied the unit will automatically
turn on. Ensure that nVision recognizes the new module by conrming in CrystalControl or the Summary screens.
8 Before using the nVision to record, Erase All Data. See Recording in the Chassis chapter.
Crystal CPF System: Medium Pressure Female (MPF) (1/4” medium pressure tube system with 7/16-20 threads). See our CPF Brochure for further information.
For most applications CPF Fittings can be hand tightened (no tools required). Wrench tightening is recommended (to achieve a metal to metal cone seal) for
applications where chemical compatibility of the process uid and the o-ring are a concern. Cone seals require only moderate assembly torque to seal up to
10 000 psi (700 bar). We recommend a tightening torque of 120 in-lbs ±20 in-lbs for our CPF ttings. Please note this is only a fraction of the typical torque
required to seal a 1/4” NPT tting. If a torque wrench isn’t practical to use, the ttings can be assembled as follows: Hand tighten tting fully
until the cone has bottomed out. Tighten an additional 20º using a wrench. Apply a small amount of media-compatible lubricant to the gland threads and
male cone to increase tting life
, reduce the likelihood of galling, and promote sealing.
Measuring Vacuum
All versions of the nVision can be used to measure moderate vacuum.
When measuring pressure less than ambient barometric conditions, a minus (-) sign will appear.
CAUTION: The nVision is not recommended for continuous use at high vacuum.
!
Water Density (Inches of Water)
The following applies only to models where inches of water is a selectable pressure unit. As shipped from the factory, the nVision is set to display inches of
water corresponding to the density of water at 4°C (39.2°F).
at 4°C (39.2°F), 20°C (68°F), or 15.6°C (60°F) temperatures.
You may require a dierent water density for your application. CrystalControl allows the user to select the appropriate water density desired
Modules 17
Overpressure Conditions
The nVision will read pressure up to approximately 110% of the rated pressure range. Above 110% of the range the display will start ashing and the readings
will not be reliable. The zero function does not aect when the display starts ashing to indicate overpressure, so depending on the zero value it is possible
that the display can start ashing without the maximum pressure being displayed.
For instance, if a 100 psi nVision is zeroed when 30 psi is being applied, it will indicate that the overpressure condition has been reached at 80 psi
(i.e., 110% x 100 psi – 30 psi = 80 psi).
Accuracy specications include all eects of linearity, hysteresis, repeatability, temperature, and stability for one year.
Note: Exposure to environmental extremes of temperature, shock, and/or vibration may warrant a more frequent
recertication period.
PM modules must be exer
specications. To exercise a gauge, cycle the gauge between zero (ambient barometric pressure) and the pressure of interest.
A properly exercised gauge will return to a zero reading (or return to the same ambient barometric reading).
CAUTION: Pressure Modules (PM) are not recommended for continuous use at high vacuum.
!
cised and re-zeroed whenever exposed to signicant changes in environmental conditions to achieve these
Dierential Pressure Measurement Uncertainties without Tare
The total nVision Reference Calibrator measurement uncertainty in the ΔP mode conguration will need to consider the uncertainties of both pressure modules. We recommend the module uncertainties to be combined with the preferred square root of the sum of the squares (or “root sum squares”) method.
The following table lists the possible c
are without using the Tare feature which will greatly improve your measurement uncertainty.
Lower Pressure
Module Uncertainties
(of Static Line Pressure)
(of Reading)
ombinations of combining Pressure Modules (PM) with dierent accuracy statements. The uncertainties reported below
Upper Pressure
Module Uncertainties
(of Static Line Pressure)
(of Reading)
0.025%0.05%
0.025%0.035%0.056%
0.05%0.056%0.071%
Dierential Pressure Measurement Uncertainties with Tare
The Tare function can improve measurement uncertainties on two modules with the same full scale pressure range installed into one nVision Reference
Recorder.
The following specications apply to the measurement system with a logging interval of 1 reading/second or slower:
Modules 20
Full Scale Range of Both SensorsThe Greater of (+/–)
desired. You may also view the barometric reference reading directly on a dedicated numerical screen. When the BARO module is installed, it may also be
disabled in CrystalControl to conserve battery power, however your nVision will not be able to display absolute readings unless it is active.
Installation of the BARO module in the power bay allows you to convert your gauge pressure measurement to the absolute scale if so
Installation
The BARO module is located in the power bay of the nVision. As with the traditional modules, installation of the BARO module should be done in a ESD
compliant, dry, clean environment, using the instructions below.
CAUTION: The BARO module requires CPLD version 6 or greater to operate properly. If you have CPLD 5 or earlier the nVision must return to the
!
1
Place the nVision face down on clean stable work surface.
2 Remove USB power connection and power pack from the nVision.
3 Remove your BARO module from factory packaging, grasp the cover, and orient as shown.
4 Slide the BARO module into the connector system.
5 Insert screw through cover and into the nVision, and tighten to 16 in-oz
Note: Remember to enable the module in CrystalControl if module is a new installation.
Note: Reset the nVision chassis after enabling or disabling the BARO.
factory for updating. You may determine your CPLD version in the Chassis Summary screen or in CrystalControl.
Absolute pressure mode is achieved by using the BARO Reference Module to establish a datum. The PM and BARO sensor uncertainties were combined to
establish a new accuracy statement for readings taken in the absolute mode. It must be noted that the accuracy statement is valid for readings of 1 barA or
greater.
Accuracy
± 0.00725 psi, ± 0.5 mbar
Accuracy specications include all eects of linearity, hysteresis, repeatability, temperature, and stability within the specied operating temperature range
for one year.
Exposure to environmental extremes of temperature, shock, and/or vibration may warrant a more frequent recertication period.
CURRENT, VOLTAGE, AND SWITCH TEST MA20 MODULE INSTRUCTIONS
The nVision MA20 module has three operational modes: current measurement, voltage measurement, and switch test. Each mode may be selected via the
Setup menu, and can only be operated one at a time.
To ensure proper connection to the MA20 Module use the following strategy:
1 Ensure that power is o on the circuit that you are about to measure.
2 Ensure your nVision is in correct MA20 Mode: mA, %4-20mA, %10-50mA, Voltage, or Switch Test.
3 Insert the Negative (black) 2mm lead jack to the proper location (black terminal) on the MA20 module. Connect the other end of the black lead to the
appropriate terminal of the source.
Insert the Positive (red) 2mm lead jack to the proper location (red terminal) on the MA20 module. Connect the other end of the red lead to the appropriate
4
terminal of the source.
5 Power up circuit and measure or record the readings as appropriate.
6 Never change modes or electrical sources without rst removing the nVision from the circuit. Failure to do so may damage the nVision.
WARNINGS: The following warnings apply to the MA20 module:
!
Never install two (2) MA20 modules simultaneously. This conguration may permanently damage your nVision.
•
Never exceed the maximum specied voltage or current ratings on the MA20 inputs. Doing so may permanently damage the MA20 module.
•
Check the test leads for continuity before using. Replace damaged test leads. Do not use the probes if they are cracked, have damaged insulation,
•
exposed metal, or high resistance.
Always remove the test leads from the module before opening the battery compartment.
•
When using test lead probes, always make sure your ngers are behind the nger guards on the probes.
•
Never connect more than two (2) test leads to a MA20 module at a time.
•
Modules 25
Current Mode
The nVision is capable of measuring current in three dierent modes. They are:
mA: Measured current is displayed (mA). The module is capable of measuring inputs up to 55mA
•
4–20%: Current is displayed as a percentage of the 4–20mA current range, where 4mA = 0%, and 20mA = 100%
•
10–50%: Current is displayed as a percentage of the 10–50mA current range, where 10mA = 0%, and 50mA = 100%
The nVision may be used to measure current up to 50mA. Select the desired current mode through the Setup menu to properly congure the nVision prior to
connection and use.
Current Measurement with HART Resistor
The nVision may be used to measure current in a circuit that includes a HART transmitter or device. For devices that use the HART protocol, a load resistor
must be placed in the loop. The HART input on the MA20 provides a 250 Ohm load resistor. Select the desired current mode through the Setup menu to
properly congure the nVision prior to connection and use.
MA20 module Current Measurement connection. MA20 module with HART load resistor.
Voltage Mode
The nVision may be used to measure voltages up to 28VDC. Select the Voltage mode through the Setup
menu to properly congure the nVision prior to connection and use.
The nVision may be used to detect switch closures. Select the Switch Test mode through the Setup menu to
properly congure the nVision prior to connection and use. The illustration denotes the proper Switch Test
connection scheme to the MA20 module.
MA20 module Switch Test connection.
CURRENT, VOLTAGE, AND SWITCH TEST MA20 MODULE SPECIFICATIONS
Modes
CurrentmA% 4–20, %10–50
Current with HART ResistormA%4–20, %10–50
VoltageV
Switch DetectionOpenClosed
Connection
2mm banana jacks for sheathed plugs. 12.7mm (0.5 in) spacing.
Note: Although nVision logging interval may be set to a faster rate, the MA20 module will update the reading at 6 times per second.
ATEX and IECEx Scheme Entity Parameters
The MA20 Module has these specic input entity parameters:
Ui = 28 V Uo = 6.6 V
li = 93.3 mA lo = 4.45 mA
Pi = 653.3 mW Po = 7.34 mW
Ci = 0.36 uF Co = 0.5 uF**
Li = 39.1 uH Lo = 12 uH*
*Total cable inductance between all modules
** Dependent on the supply to the terminals but shall not be greater than 0.5 uF
Current (mA) Input
Accuracy
±(0.015% of reading + 0.002mA)
Accuracy specications include all eects of linearity, hysteresis, repeatability, temperature, and stability within the specied operating temperature range
for one year.
ote:
Exposure to environmental extremes of temperature, shock, and/or vibration may warrant a more frequent recertication period.
Accuracy specications include all eects of linearity, hysteresis, repeatability, temperature, and stability within the specied operating temperature range
for one year.
ote:
Exposure to environmental extremes of temperature, shock, and/or vibration may warrant a more frequent recertication period.
Open State Resistance . . . . . . . . . . . > 10 MΩ
TEMPERATURE RTD100 MODULE INSTRUCTIONS
Your nVision has the ability to measure temperature very accurately if populated with an RTD100 module. With this system you may connect your resistance
temperature detector (platinum RTD) or platinum resistance thermometer (PRT) to the nVision using the provided IP67 rated connector system (P/N: 3953).
Once the sensing element is connected, you may display the temperature reading in your desired unit. The nVision can also measure electrical resistance (Ω)
to help in troubleshooting your resistance based sensing element.
Modules 29
Temperature Coecient of Resistance (TCR)
Your nVision comes pre-loaded with several common RTD sensing element TCR values with the appropriate Callendar-Van Dusen Coecients to convert your
resistance measurement to the appropriate temperature measurement. The available 100Ω platinum RTD TCRs are:
Pt100 (385) Euro
•
Pt100 (3911) US
•
Pt100 (3926)
•
you have selected the correct setting for your sensing element.
Simply select the desired TCR or coecient values in CrystalControl for use on the nVision. You may also view the Summary page to conrm
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nVision Operation Manual
Connecting your RTD to the RTD100 Module
Your nVision RTD100 module has been shipped with an IP67 rated, M8 connector (P/N: 3953). The terminal block based connector allows you to attach your
RTD sensor for 2-, 3-, or 4-wire connections. Care must be taken to install the RTD connector shell properly to ensure the robust IP67 sealing.
1 RTD sensor element connection requirements:
100Ω Platinum RTD with:
•
TCR of 385, 3926, or 3911
•
Cable diameter of 3.5 to 5.0mm [0.14 to 0.2 inches] with smooth, continuous covering adequate for IP67 sealing.
•
Stranded conductor cross section of 0.14 to 0.5mm2 [0.0002 to 0.0008 in2].
•
2 For your ease in sourcing this connector, the following sources of supply may be used:
Phoenix Contact:
•
Order Number: 1501265, or Part Number: SACC-M8MS-4CON-M-SW
•
Binder:
•
Part Number 99-3383-100-04
•
3 RTD sensor element cable preparation:
(a) Strip approximately 12.0mm [0.5 in] outer insulation from RTD cable.
(b) Strip the individual RTD element sense wires approximately 4.0mm [0.16 in].
(c) Install 3 piece sealing system onto the cable assembly. Take care to place parts in proper order and orientation.
(d) Install your RTD sense element wires as appropriate for your conguration (see illustration below), and tighten the set screws.
(e) Conrm correct orientation of element wires in connected state.
2-wire 3-wire 4-wire
4 Lubricate o-ring and thread system with Dow 111 or equivalent in location near terminal block as required to prevent water intrusion when connector shell
is installed. Thread shell in place until tight.
5 Leak check to ensure water tight seal. If any leaking occurs, rework and lubricate as necessary. If leak-free, your RTD sensor is ready to use with the nVision
Reference Recorder.
Note:
Your nVision has the RTD100 module TCR set to Pt100 (385) Euro. Modify this setting in CrystalControl as needed.
Modifying the Base Resistance (Ro)
As with any measurement device, it is possible the sensor will drift over time or from extreme temperatures. The nVision allows a user dened oset to the
100Ω base resistance experienced at 0ºC if needed to improve the performance of your sensor.
Dierential Temperature
The Tare function also allows you to equalize the dierential temperature or resistance measurements to improve your measurement accuracy. Therefore,
if you apply the same temperature or resistance signal to both RTD100 sensor elements simultaneously you should have a ΔT reading of zero. Due to the allowable error tolerance for each module, the reading may not be zero. The Tare function allows you to normalize both of these readings so that the ΔT reading
ero.
Therefore, you will have a much more accurate ΔT reading than you normally would have if this process was not completed. Note that generally ac-
is z
cepted lab practices should be followed when trying to establish a common temperature measurement on two independent sensors.
he Tar
e should be reestablished every time you are at a new temperature or resistance. For instance if your ΔT reading has 0.2°C of Tare at 220°C, when you
T
return to ambient conditions this 0.2°C of Tare will remain in place on your ΔT reading until cleared with the button.
Modules 31
Dierential Temperature Measurement Uncertainties without Tare
The RTD100 module is capable of both temperature and resistance measurements. The resistance measurement uncertainty can be calculated by
combining the uncertainties of the two resistance measurements. The following formulas describe the combined uncertainty of two RTD100 Module
resistance measurements.
To calculate the total uncertainty of the dierential temperature measurement (
and RTD sensor element systems (
Usystem for the upper and lower RTD100 and RTD sensor element systems:Calculate the total dierential pressure uncertainty:
Calculate
U
system).
U
ΔT ) you must combine the uncertainties of the upper and lower RTD100
Dierential Temperature Measurement Uncertainties with Tare
To determine the improved Tare function uncertainties it may be necessary to conduct an analysis of the application. A suggested method of analysis is to
Tare the ΔT reading when measuring the isolated temperature at site A. Without resetting the Tare, measure the isolated site B temperature and determine the
error in your ΔT reading. Comparing these results would represent the full range of Δt readings that you would see in your application.
TEMPERATURE RTD100 MODULE SPECIFICATIONS
Accuracy
0% to 100% of Full Scale . . . . . . . . . ±(0.015% of reading + 0.02Ω)
Accuracy specications include all eects of linearity, hysteresis, repeatability, temperature, and stability within the specied operating temperature range
for one year.
Exposure to environmental extremes of temperature, shock, and/or vibration may warrant a more frequent recertication period.
Note:
Ranges, Resolutions, and Units
Range . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 400Ω for use with 100Ω PRT (platinum resistance temperature detectors)
Available TCR Selections: 0.00385, 0.003911, or 0.003926
Connection
RTD Sensor Connector Interface
P/N 3953: RTD Connection Kit (one IP67 terminal block connector) (equivalent to Phoenix Contact Order Number: 1501265,
or Part Number: SACC-M8MS-4CON-M-SW, or Binder P/N: 99-3383-100-04)
Cable Diameter. . . . . . . . . . . . . . . . . .
Stranded Conductor Cross Section ........ 0.14 to 0.5mm
Note: Although the nVision logging interval may be set to a faster rate, the RTD100 module will update the reading at 5 times per second.
ATEX and IECEx Scheme Entity Parameters
The RTD100 module has these specic input entity parameters:
Ui = 0 Uo = 9.73 V
li = 0 lo = 1.6642 APi = 0 Po = 1.1 WCo = 0.5 uFLo = 12 uH*
* Total cable inductance between all modules
RESISTANCE TEMPERATURE DETECTORS RTD
Resistance Temperature Detectors (RTDs) are temperature sensors that contain a resistor that utilize the predictable change in electrical resistance of particular materials over temperature. Platinum elements have been used for many years in laboratories and industrial processes, and have a reputation for range,
epeatability, and stability. The selection strengths of RTDs, or sometimes called PRT (platinum resistance thermometer) are their wide temperature
linearity, r
range (approximately -200 to 850ºC), accuracy (better than thermocouples), good interchangeability between similar sensors, and long-term stability.
Callendar-Van Dusen Equation
The relationship between temperature and resistance is given by the Callendar-Van Dusen equation.
RT = R0 [1 + AT + BT
RT = R0 [1 + AT + BT
Where: RT = the resistance at temperature, T; R0 = the resistance at 0°C; and the constants A, B, and C dependent upon RTD selected (TCR).
nVision (TCR)
Temp. Coecient of
Resistance
Pt100 (385) Euro
Pt100 (3926) US
Pt100 (3911)
2
+ CT3 (T-100)] for (-200°C < T < 0°C)
2
] for (0°C ≤ T ≤ °C of Upper Temperature Range listed below)
To understand the total system measurement uncertainty of the temperature measurement you must consider both the nVision and the RTD sensing element
uncertainties utilized in the test application. Since the uncertainties of nVision and the sense element are independent of each other, they must be combined
properly with the preferred square root of the sum of the squares
The proper selection of the RTD sensing element is very important as the error associated with this device is the majority of the overall system measurement
uncertainty. IEC 751 is the standard that denes the temperature versus resistance for 100Ω, 0.00385 Ω/Ω/°C platinum RTDs. IEC 751 denes two classes of
RTDs: Class A and B. Class A RTDs operate over the -200 to 630°C range versus -200 to 800°C for the Class B elements. For example, the Class A uncertainty is
about half that of the Class B elements as illustrated in the following table.
Tolerance ClassTemperature DeviationAccuracy at 0°CStandard
Class A±(0.15 + 0.002*t)°C100.00 ± 0.06 ΩDIN/IEC751
Class B±(0.3 + 0.005*t)°C100.00 ± 0.12 ΩDIN/IEC751
1We recommend combining system expanded uncertainties in accordance with recommendations
outlined in ISO “Guide to Expression of Uncertainty in Measurement (GUM).
The uncertainties typically reported by us represent expanded uncertainties using a coverage factor
k=2 to approximate a 95% condence level. The typical method of combining
uncertainties is the root sum squares of the individual contributing uncertainties and will be
The nVision Reference screen display has the following power icon states:
Power Icon Key - nVision Reference Recorder
Icon
Description
The icon will appear when the batteries are exhausted and will need to be changed to ensure full functionality of the nVision. Continued use will further drain the batteries to a non-operational state where the message “Replace Batteries” will appear across the display. From this state, the only operational
parameter will be the pow
recorded data will be preserved.
CAUTION: Never remove battery or USB power when Recording.
!
WARNING: Do not remove or change the batteries in a hazardous atmosphere.
!
External
Power
Automatic Shuto Timer and Low Power Mode
100%75%50%25% 0%*
(USB)
er button . After “Replace Batteries” appears, no measurements will be possible until the batteries are replaced, however, the
Power Remaining
*Replace Batteries or connect to USB Power
The Automatic Shuto Timer is set in CrystalControl. During normal (non-recording) operation, the nVision will power
down when the Automatic Shuto Timer runs out. The Automatic Shuto timer will not shut o your nVision while
recording. Instead, The Low Power Mode screen will appear after the Automatic Shuto Timer runs out. To return to
normal operation simply press the
Note that the nVision reference recorder has many customizable battery saving features available to you for optimization in CrystalControl.
Low Power Mode
You may extend battery life substantially by slowing down your Logging Interval (recording rate), reducing the Automatic Shuto and Backlight Shuto times,
or reducing the number of screens enabled.
Ultra Low Power Mode
During a recording with a Logging Interval of 1 reading/minute or slower, your nVision will enter Ultra-Low Power Mode after the rst reading elapses AND
the Automatic Shuto Timer runs out. The battery conservation measures used in Ultra-Low Power Mode allow the nVision to enter a deep-sleep condition
between data readings
Note: The Backlight Shuto is set separately in CrystalControl. It is unaected by the Automatic Shuto Timer, Low Power Mode, or Ultra Low Power Mode.
Battery Replacement
The nVision uses four AA batteries. Unscrew the four captive screws (knurled Phillips head) to gain access to the battery compartment. Replace the batteries
taking care to note polarity for their proper installation. After replacing the batteries and reinstalling the power module, the nVision will start operating immediately (without having to press the button). This indicates that a complete reset has occurred, and is normal. Verify the battery module is properly sealed
and installed t
nVision. IP67 rating will be void if nVision is operated without 4AA power module in place.
WARNING: Do not remove or change the batteries in a hazardous atmosphere.
!
o maintain your IP67 r
ating. Failure to properly seal the battery compartment may allow water damage that could permanently compromise the
WARNING: Do not remove or change the batteries in a hazardous atmosphere.
!
The nVision is Intrinsically Safe only if powered by one of the following battery types:
Approved Battery TypeTa=Marking
Rayovac Max Plus 815-20 to 50 ° C
Duracell MN1500-20 to 45° C
Energizer E91, EN91*
Duracell MN1500
Replace batteries with approved type in non-hazardous locations only
Energizer is manufactured by Energizer Holdings, Inc., and the Eveready Battery Company, Inc.
*
Many other battery types and models have been tested but failed to meet the requirements for Intrinsic Safety—do not assume other models are equivalent.
The nVision can be operated and powered from the mini-USB serial interface.
WARNING: Do not use the mini-USB serial interface in a hazardous atmosphere.
The nVision is CSA certied only if powered by one of the following battery types:
Approved Battery TypeTa=Marking
Rayovac Max Plus 815-20 to 50° C
Duracell MN1500-20 to 45° C
Energizer E91
Energizer EN91
Duracell MN1500Class I, Division 1, Grp C, D T3C
Replace batteries with approved type in non-hazardous locations only
Battery Life
Settings such as Auto Shuto, Logging Interval, and Backlight Shuto greatly vary battery life.
Standard . . . . . . . . . . . . . . . . . . . . . . . . 200 hours (typical) (1 reading per second recording, auto shuto 20 minutes).
Ultra Low Power . . . . . . . . . . . . . . . . . 60 Days (typical) (2 installed modules, 1 reading per 5 minute recording interval with Auto Shuto enabled
USB POWER
The USB connected/powered icon ( ) will become active when connected. The mini USB connection will power the nVision with and without the battery
pack installed. Since the power module consists of alkaline AA batteries, they will not be recharged by the USB device.
IP67 rating will be void if nVision is operated without 4AA power module in place. Therefore, if you desire to power the nVision with USB it is recommended to
install the 4AA power module (with or without batteries) to protect the reference recorder from the elements.
nVision under USB power consumes less than 100mA.
RESET
If for some reason the nVision needs to be reset, remove the battery pack and USB power for at least one minute, then reinstall. If the reset is
successful, the nVision will start operating without pressing the power button when the power pack is reinstalled.
-20 to 50° C
Class I, Division 1, Grp C, D T4
Class I, Division 1, Grp C, D T3B
Class I, Division 1, Grp C, D T3A
and 23° C ambient temperature).
Power 37
WARNING: Do not remove or change the batteries in a hazardous atmosphere.
The nVision reference recorder includes the following Intrinsic Safety approvals:
Safety and Certications 38
II 1G Ex ia IIB T4 Ga -or- Ex ia IIB T3 Ga
Ta = -20C to 50C or -20C to 45C (depending on type of approved battery used)
See the Appr
All module entity parameters may be found under the specic module specication section.
WARNINGS: The following warnings apply to the Reference Recorder:
!
The mini USB B connector shall not be used within the hazardous atmosphere. It shall be used in the non-hazardous atmosphere with either “Safety
•
Substitution of components may impair intrinsic safety.
•
Replace batteries with approved type in non-hazardous locations only.
•
Parts of the enclosure may generate an ignition-capable level of electrostatic charge under certain extreme conditions. The user should ensure that the
•
CERTIFICATIONS
The nVision has been tested and certied to comply with a variety of international standards.
oved Batteries section for more details
SIRA 09ATEX2008X
This product conforms to the following standards:
Extra Low Voltage Circuits” (SELV) or “Protective Extra Low Voltage Circuits” (PELV). The USB connector has an Um of 6V.
equipment is not installed or used in a location where it may be subjected to external conditions, which might cause a build-up of electrostatic charge
on non-conducting surfaces. Additionally, cleaning of the equipment should be done only with a damp cloth.
We declare that the nVision is in accordance with the ATEX Directive,
the Electromagnetic Compatibility Directive, and the Pressure
Equipment Directive per our declaration(s).
This nVision complies with the A
(Electromagnetic Compatibility) Standard 2008.
ustralian Radiocommunications
Intrinsically Safe and Non-incendive for Hazardous Locations:
Class I, Division 1, Groups C and D, Temperature Code T4
IECEx SIR09.0053X
This product conforms to the following standards:
The nVision is approved for use as a portable test instrument for
Marine use and complies with Det Norsjke Veritas’ Rules for Classi
cation of Ships, High Speed & Light Craft and Oshore Standards.
Bezpečnostní instrukce pro prostředí s nebezpečím výbuchu
V prostředí s nebezpečím výbuchu nepoužívejte přípojku USB.
•
Baterie vyměňujte pouze v bezpečném prostředí. Používejte pouze schválené baterie.
•
Za správné použití tohoto přístroje v prostředí s nebezpečím výbuchu odpovídá jeho uživatel.
•
Schválené baterie
Přístroj nVision je jiskrově bezpečný pouze pokud je napájen jedním z následujících typů baterií:
Approved Battery TypeTa=Marking
Rayovac Max Plus 815-20 to 50 ° C
Duracell MN1500-20 to 45° C
Energizer E91, EN91
Duracell MN1500
Replace batteries with approved type in non-hazardous locations only
Mnoho dalších druhů a typů baterií bylo zkoušeno, ale nesplnily požadavky na jiskrovou bezpečnost - nepředpokládejte, že jiné typy jsou rovnocenné.
Energizer vyrábí Energizer Holdings, Inc. a the Eveready Battery Company, Inc.
-20 to 50 ° CEx ia IIB T3 Ga
Ex ia IIB T4 Ga
Deutsch (German)
Sicherheitshinweise für explosionsgefährdeten Orten
Die USB Schnittstellenverbindung darf niemals in einer explosionsgefährdeten Umgebung benutzt werden.
•
Der Batteriewechsel muß ausschließlich in sicherer Umgebung mit den vom Hersteller vorgeschriebenen Batterie-Typen erfolgen.
•
Der Benutzer ist für den richtigen Umgang des Digitalmanometers in explosions- gefährdeter Umgebung verantwortlich.
•
Vom Hersteller vorgeschriebene Batterien
Das nVision ist nur dann eigensicher, wenn die vom Hersteller vorgeschriebenen Batterien eingetzt werden:
Approved Battery TypeTa=Marking
Rayovac Max Plus 815-20 to 50 ° C
Duracell MN1500-20 to 45° C
Energizer E91, EN91
Duracell MN1500
Replace batteries with approved type in non-hazardous locations only
Es wurden viele andere Batterietypen vom Hersteller getestet, aber diese haben den Hersteller-Anforderungen für Eigensicherheit nicht entsprochen. Aus diesem Grund dürfen nur
vom Hersteller vorgeschriebene Batterie-Typen in das Gerät eingesetzt werden, um die Eigensicherheit zu gewährleisten.
Energizer wird von Energizer Holdings, Inc., und der Eveready Battery Company, Inc. hergestellt.
Do not use the USB connector in a hazardous location.
•
Replace batteries in non-hazardous locations, with approved batteries, only.
•
It is the users responsibility to understand the proper application of this product in potentially explosive atmospheres.
•
Approved Batteries
The nVision is Intrinsically Safe only if powered by one of the following battery types:
Approved Battery TypeTa=Marking
Rayovac Max Plus 815-20 to 50 ° C
Duracell MN1500-20 to 45° C
Energizer E91, EN91
Duracell MN1500
Replace batteries with approved type in non-hazardous locations only
Many other battery types and models have been tested but failed to meet the requirements for Intrinsic Safety - do not assume other models are equivalent.
Energizer is manufactured by Energizer Holdings, Inc., and the Eveready Battery Company, Inc.
-20 to 50 ° CEx ia IIB T3 Ga
Ex ia IIB T4 Ga
Español (Spanish)
Instrucciones de seguridad para zonas peligrosas
No use el conector USB en zona clasicada.
•
Cambie las pilas en zona no clasicada, solo con pilas aprobadas.
•
Es responsabilidad del usario comprender la aplicación de este producto en atmósferas potencialmente explosivas.
•
Pilas aprobadas
El nVision solo es intrínsecamente seguro si se alimenta con uno de los siguientes tipos de pilas:
Approved Battery TypeTa=Marking
Rayovac Max Plus 815-20 to 50 ° C
Duracell MN1500-20 to 45° C
Energizer E91, EN91
Duracell MN1500
Replace batteries with approved type in non-hazardous locations only
Se han probado muchos otros tipos de baterías pero han fallado el cumplimiento de los requisitos para la seguridad intrínseca - No asuma que otros modelos son equivalentes.
Energizer está fabricado por Energizer Holdings, Inc., y por Eveready Battery Company, Inc.
Instructions de sécurité pour les Zones Dangereuses
Ne pas utilisez le connecteur USB dans une Zone Dangereuse.
•
Remplacez les piles dans des Zones non-dangereuses, avec les piles appropriées, uniquement.
•
Il est de la responsabilité de l’utilisateur de bien comprendre l’application appropriée de ce produit en atmosphères explosives.
•
Piles approuvées
Le nVision est un système à sécurité Intrinsèque seulement s’il est alimenté par un des Piles de type suivant:
Approved Battery TypeTa=Marking
Rayovac Max Plus 815-20 to 50 ° C
Duracell MN1500-20 to 45° C
Energizer E91, EN91
Duracell MN1500
Replace batteries with approved type in non-hazardous locations only
Beaucoup d’autres types et modèles de Piles ont été examinés mais ne conviennent pas pour répondre aux conditions de sécurité intrinsèque - Ne jamais supposez que d’autres
modèles pourraient être équivalents.
Les batteries Energizer sont fabriquées par les sociétés Energizer Holdings inc. et Eveready Battery Inc.
-20 to 50 ° CEx ia IIB T3 Ga
Ex ia IIB T4 Ga
Italiano (Italian)
Prescrizioni di Sicurezza per Area Pericolosa
Non utilizzare il connettore USB in Area Pericolosa.
•
Sostituire le batterie in Aree non Pericolose e solamente con Batterie approvate.
•
E’ responsabilità dell’utilizzatore comprendere l’adatta applicazione di questo prodotto in atmosfere potenzialmente esplosive.
•
Batterie Approvate
L’ nVision è a Sicurezza Intrinseca solo se alimentato da uno dei seguenti tipi di batteria:
Approved Battery TypeTa=Marking
Rayovac Max Plus 815-20 to 50 ° C
Duracell MN1500-20 to 45° C
Energizer E91, EN91
Duracell MN1500
Replace batteries with approved type in non-hazardous locations only
Molti altri tipi e modelli di batteria sono stati testati ma non sono risultati conformi alle richieste per Sicurezza Intrinseca - non supponete che altri modelli siano equivalenti.
La batteria (Energizer) è fabbricata da Energizer Holdings Inc. e Eveready Battery Company Inc.
Veiligheidsinstructie voor gebruik in een explosie gevaarlijkeomgeving
Het gebruik van de USB interface is niet toegestaan in een explosie gevaarlijke omgeving.
•
Vervang de batterijen uitsluitend in een niet explosie gevaarlijke omgeving en gebruik alleen batterijen welke zijn goedgekeurd en toegestaan.
•
De gebruiker dient er mee bekend te zijn welke gevaren er kunnen optreden in een explosie gevaarlijke ruimte bij gebruik van dit product. Het is de verant-
•
woordelijkheid van de gebruiker om dit product op een juiste wijze toe te passen.
Batterijen welke zijn goedgekeurd
De nVision is alleen intrinsiek veilig bij gebruik van de volgende batterijen:
Approved Battery TypeTa=Marking
Rayovac Max Plus 815-20 to 50 ° C
Duracell MN1500-20 to 45° C
Energizer E91, EN91
Duracell MN1500
Replace batteries with approved type in non-hazardous locations only
Bij gebruik van andere niet gecerticeerde batterijen vervalt de intrinsiek veilige ATEX certicering. Een aantal andere batterij merken en types zijn getest maar voldeden niet aan de
ATEX voorwaarden voor intrinsieke veiligheid, U mag er daarom niet van uitgaan dat andere equivalente types wel geschikt zullen zijn.
Energizer wordt gefabriceerd door Energizer Holdings, Inc en de Eveready Battery Company, Inc
-20 to 50 ° CEx ia IIB T3 Ga
Ex ia IIB T4 Ga
Polski (Polish)
Instrukcja Bezpieczeństwa Dla Srefy Zagrożonej Wybuchem
Połączenie USB może być używane tylko poza strefą zagrożenia wybuchem.
•
Wymiana baterii tylko poza strefą zagrożenia wybuchem, używaż tylko zatwierdzony typ baterii.
•
Odpowiedzialnością użytkownika jest używanie tego produktu we wlaściwy sposób w stree zagrożonej wybuchem.
•
Zatwierdzone baterie
nVision wersja Iskrbezpieczna może być tylko zasilana przez nastepujące typy baterii:
Approved Battery TypeTa=Marking
Rayovac Max Plus 815-20 to 50 ° C
Duracell MN1500-20 to 45° C
Energizer E91, EN91
Duracell MN1500
Replace batteries with approved type in non-hazardous locations only
Wiele innych typów i modeli baterii przetesowano lecz nie spelniały wymagań Iskrobezpieczeństwa - nie przyjmuje się że inne modele są równoważne.
Energizer jest produkowany przez Energizer Holdings, Inc. lub przez Eveready Battery Company, Inc.
The nVision is a very high performance reference recorder. Due to the high resolution of this product, you may observe conditions that appear to be defects in the
product, but are in fact a result of being able to read and measure pressure to a degree not possible with other instruments.
Noisy or unstable reading when used with uids
When calibrating or comparing the indicated pressure from an nVision against a hydraulic deadweight tester or piston gauge, the reading on the nVision may
appear unstable—the least signicant digit jumps up and down several counts.
Reason
Gas (usually air) is trapped in the line between the nVision and the deadweight tester. What is actually happening is the mass is oscillating up and down, and
the combination of gas and uid is acting like a spring. At higher pressures (above 2000 psi, typically) this may eventually diminish, as the gas dissolves into
the uid.
Solution
Evacuate all tubing with a vacuum pump before introducing uid into the system.
Non-repeatability of pressure measurements
When checking the gauge against a hydraulic deadweight, increasing pressure measurements do not match decreasing pressure measurements.
Reason
As in the previous note, gas has dissolved into the hydraulic uid. When decreasing the pressure, the dissolved gas then leaves the uid, but at an uneven rate,
so a small pressure dierential (due to uid head pressure) may exist between the reference deadweight and the gauge being tested.
Solution
Evacuate all tubing with a vacuum pump before introducing uid into the system.
Support 44
Slow return to zero and/or non-repeatability of pressure measurements
Reason
Pressure port is obstructed.
Solution
Clean with low pressure uid. Do not touch diaphragm as damage will result.
The nVision checks the integrity of internal calibration coecients every time it’s turned on. If any coecients have been corrupted in any way, “Error 1” is
displayed.
Solution
Contact factory for instructions on how to restore the memory to the original factory settings.
Error 2 displayed
Reason
The nVision has tried to display a number too large for the display (i.e., more than 6 digits). May be due to an electrical malfunction or numerical error.
Solution
Contact factory for further instructions.
Error 5 or Error 6 displayed
Reason
The nVision pressure module (PM) is exhibiting out of normal operating condition behavior.
Solution
Contact factory for module replacement.
Error 7 displayed
Reason:
The nVision has lost communication with one or both of your modules.
Solution
It may be possible to recover from this condition by removing and reconnecting your modules using the Module Installation Instructions in this manual. This
may happen if you change modules but do not remove and replace the 4AA, USB, or AC Power to the unit to force a complete reset of the product. Once this
is done the module should be recognized properly. If unsuccessful in resolving the issue, contact factory for module replacement.
Support 45
Date and Time are incorrect
Reason
The nVision has its date and time synchronised to computers located in our factory.
Solution
Connect to CrystalControl on a computer with the correct date and time settings you desire. During the connection process, the nVision
If adjustment is required, we recommend returning the nVision or separate modules to the factory. Factory service oers benets you won’t nd anywhere
else. Factory calibration tests your nVision at a variety of temperatures utilizing NIST traceable standards, resulting in calibration certicates that provide
performance data over temperature. Our calibration facilities are A2LA accredited to ISO 17025:2005 & ANSI/NCSL Z540-1-1994. A2LA is internationally recog
nized as an accreditation body by the International Laboratory Accreditation Cooperation, ILAC. Furthermore, upgrades may be available to add or enhance
operating fea
Under normal operating conditions, we recommend the nVision be calibrated on an annual basis. Your quality system may require more or less frequent
calibration, or your experience with the gauge, or operating environment may suggest longer or shorter intervals.
Although we pref
nel with appropriate training and equipment. The following instructions are ONLY intended for such qualied personnel with appropriate test equipment. We
recommend that the calibr
of accuracy requires the use of piston (deadweight) gauges or very high performance pressure controllers.
As components age this may need to be changed to a value slightly higher or lower, to slightly increase or decrease all readings. This adjustment can be made
with a computer through CrystalControl.
tures. We designed the product to last, and we support it so that you can get the most from your investment.
er that you return the nVision to us for calibration, ordinary recertication and/or adjustments may be performed by any qualied person-
ation standards used have a minimum rated accuracy of 0.008% of reading, or equivalent in terms of percent of full scale. This level
There are no internal potentiometers. The nVision contains a “span” fac tor (userspan), set to approximately 1 (as shipped from the factory).
Calibration for Pressure Modules (PM)
increase or decrease of the indicated pressures.
“Zero” the nVision, then record displayed pressure for two or more pressure points. Determine if the nVision would benet from an overall
Adjust userspan accordingly and validate results.
Calibration for Barometric Reference Module (BARO)
and Oset information directly, or you can use the Calibration Wizard to calculate the optimum values for a 1 or 2 point calibration.
1 Connect USB power to the nVision and remove the 4AA power module
2 Remove the plastic mounting screw and bend the cover to allow access to the small, round, BARO sensor while in the electrically connected state.
3 Connect exible 4.8mm [3/16"] ID tubing from your clean pneumatic calibration reference directly to the BARO sensor.
The BARO module can be calibrated by selecting the Edit Calibration Data button while within the BARO Cong screen. Enter Userspan
Support 46
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CAUTION: Do not subject the BARO sensor to pressures less than 700 mbarA (10.153 psiA), or greater than 1100 mbarA (15.954 psiA),
!
CAUTION: Direct contact with the sur face of the BARO sensor may cause permanent damage. Direct sunlight on exposed BARO sensor
as this may cause permanent damage. Use only clean a clean dry pneumatic source.
may aect readings slightly.
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nVision Operation Manual
Calibration for Current, Voltage & Switch Test Module (MA20)
played current or voltage for two or more points. Determine if the nVision would benet from an overal increase or decrease of the indicated reading and
modify using the userspan and oset featur
To setup the Switch Test feature, select the Setup Wizard button in the MA20 Module Cong screen and follow the instructions.
The MA20 can be calibrated through the use of the span factor (userspan) and the Oset for the current and voltage modes. Record dis-
e of CrystalControl.
Calibration for Temperature Modules (RTD100)
temperature for two or more temperature points.
and modify using the userspan feature in
default value of 100 Ω using the Base Resistance (Ro) at 0ºC in
should be used with care.
ACCESSORIES AND REPLACEMENT PARTS
P/N 4547BARO Calibration Kit
Includes 3/16" calibration hose with tting coupler
P/N 4087Soft Carrying Case
Durable, padded case with separate pockets for your nVision and accessories
P/N 3951USB A to mini USB B Cable
6' [1
.8m] USB A to mini USB B Cable.
WARNING: Do not use USB interface within a hazardous atmosphere (Um = 6V).
!
P/N 3952Test Lead Kit (included in MA20)
Two 39" [1m] 2mm banana jack test leads with multi-purpose clip
P/N 3953RTD Connection Kit (included in RTD100)
One IP67 terminal block connector (RTD Module or RTD Sense Element not included)
P/N 3985Protective Boot
Skydrol™ resistant protective boot
The RTD sensor can be calibrated through the use of the span factor (userspan) and the Base Resistance (Ro) at 0ºC.Record displayed
. Blue.
Determine if the nVision would benet from an overall increase or decrease of the indicated temperatures
CrystalControl.It is also possible to modify the RTD sensor resistance reading at 0 to a custom value other than the
CrystalControl. Note, however, that the Ro oset will aect all RTDs used with the nVision and
This manual contains the following third-party trademarks, both registered and unregistered. All marks are the property of their respective companies.
Rayovac® and Maximum Plus™ .................Rayovac Corporation
Duracell® ......................................Duracell Inc. Corporation
Energizer® and Eveready .......................Eveready Battery Company, Inc.
“Pressure is Our Business” is a registered trademark of Crystal Engineering Corp.
WARRANTY
Crystal Engineering Corporation warrants the nVision Reference Recorder to be free from defects in material and workmanship under normal use and service
for one (1) year from date of purchase to the original purchaser. It does not apply to batteries or when the product has been misused, altered or damaged by
accident or abnormal conditions of operation.
Crystal Engineering will, at our option, repair or replace the defective device free of charge and the device will be returned, transportation prepaid. However, if
we determine the failure was caused by misuse, alteration, accident or abnormal condition of operation, you will be billed for the repair.
CRYSTAL ENGINEERING CORPORATION MAKES NO WARRANTY OTHER THAN THE LIMITED WARRANTY STATED ABOVE. ALL WARRANTIES, INCLUDING IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE, ARE LIMITED TO A PERIOD OF ONE (1) YEAR FROM THE DATE OF PURCHASE.
CRYSTAL ENGINEERING SHALL NOT BE LIABLE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES, WHETHER IN CONTRACT, TORT OR OTHERWISE.
Note: (USA only) Some states do not allow limitations of implied warranties or the exclusion of incidental or consequential damages, so the above limitations
or exclusions may not apply to you. This warranty gives you specic legal rights and you may have other rights which vary from state to state.