AMETEK BARO 100 psi nVision Reference Recorder User Manual

NVISION Operation Manual
for Reference Recorder

Overview

INTRODUCTION

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 pe, 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 flexible and can be configured 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 specific task.
Accuracy is up to 0.025 percent of reading – so any nVision can typically replace several gauges or calibrators you may have been using. The nVision is fully temperature compensated – so there is no change in accuracy throughout the entire operating temperature range!
The nVision features two identical bays allowing configuration of the reference recorder to meet your requirements. All modules are field- replaceable allowing you the flexibility 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 a t up to 10 readings per second on up to two modules simultaneously
• ATEX/IECEx Scheme intrinsically safe
• Interactive real-time graphing of measurements
• IP 67 rated enclosure —1 meter immersion for 30 minutes

Your nVision can be customized to meet your specific test needs through the use of CrystalControl™ software. Your personal computer can disable, enable, or modify a variety of features of your nVision. Look for the (CrvstaLContro.) logo for user programmable features, like:

• User defined pressure units, and/or disable unused pressure units
• Password protection to prevent unauthorized changes to gauge settings and/or product keypad access
• Expand or decrease allowable Zero range
• Set the gauge to a different density of water factor (4°C, 60°F, or 68°F)
• Store custom ID or tag numbers in non-volatile memory

Functions

ON/OFF
  Power button
Press and hold the (power) button for 1 second to turn the nVision on or off. The nVision will automatically power down if not used for the time period defined in CrystalControl.
Automatic Shutoff – Low Power Mode
Adjust your Automatic Shutoff time (shut off time in absence of key press) to optimize battery life. This feature is adjustable from 30 seconds to “always on.” During a recording, the nVision will enter Low Power Mode instead of shutting off.
When powered by USB, the nVision does not employ any power management strategies. Therefore, it will not automatically shut off to the settings defined by CrystalControl.
During a recording with a Logging Interval of 1 reading/minute or slower, your nVision will enter Ultra-Low Power Mode after the first reading elapses and the Automatic Shutoff Timer runs out.
The Backlight Shutoff is set separately in CrystalControl. It is unaffected 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.
Your nVision is capable of recording more than 500,000 data points when both module bays are populated. With one bay populated, this 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 configure, 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 (record) button for one second.
   Note: You may be prompted to enter a Run Tag, if enabled. For more information, see Run Tags.

2. The red LED will start flashing when the recording begins.

3. Tostop recording, press the (record) button again. The red LED will flash twice.

Note: The nVision records data for all screens enabled in Crystal Control. Even if you are viewing data for the lower module numerical display, 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.
Zero
To zero the nVision:

• 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 (- – -).
  ***You can adjust the Zero Limit at which the (zero) button will display - -HI- -” in CrystalControl. You can also disable the (zero) button 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 Crystal Control, the command will be ignored, and *- – HI – – ” will display.
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 it may not be indicating true pressure. Never disconnect pressure instrumentation without first relieving system pressure!

NUMERICAL DISPLAY OVERVIEW

GRAPHICAL DISPLAY OVERVIEW

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 specific points along your run, while displaying reading and time information. The (▲) & (▼) keys allow you to zoom in and out of your recorded run to suit your needs.
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.

Zooming in o n Specific 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 (▼) arrow s 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 (▼) arrow for 5 seconds, or until you are completely zoomed out.

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.

DIFFERENTIAL MODE
The nVision automatically displays numerical and graphical differential screens if two similar module types are installed. AP becomes available if your nVision is populated with two PM modules, AT 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 configuration may permanently damage your nVision.
In Differential Mode the AP or AT represents a filtered reading of the upper module – lower module + tare reading.

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 Differential Mode.
Note: To change the displayed units on any Differential Display, see the Units section.

Tare
Using the Tare function improves your differential measurement uncertainty significantly 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 AP or AT reading.
If you apply the same static line pressure, temperature, or resistance signal to both sensors simultaneously, you should have a differential 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 readings so that the differential reading is zero. This gives you a more accurate differential 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 AP 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 AP reading until cleared with the Tare button.
▶To Tare:

1. Use the (next) button to select the Differential Mode Numerical Screen.
2. Press the (zero) button until the display flashes dashed lines ( – – – – ).
3. To clear the Tare value i n the Differential Mode, hold the button for 3 seconds until the main display readings change from( – – – – – ; ) to (– -).

RUN TAGS
Run Tags are 22 character identifiers you can enter to name each data run. They are enabled by selecting the Enable Run Tags checkbox.
The Run Tags you choose will display in Crystal Control’s Data Viewer and your downloaded data.
▶ To use Run Tags:

1. Press (record) from any screen. A QWERTY keyboard will appear, giving you the option to add your Run T a g .
2. Use the (▲) , (▼), (▶) , and (◀) arrows and the (select) button to edit your Run Tag o n the QWERTY keyboard.
3. Press the (next) button, or move to the onscreen checkbox and press the (select) button. Your recording will begin immediately.

You can also enter up to five predefined Run Tags when the Predefined Run Tags box is checked.

1. Press (record) from any screen.
2. Use the (▲), (▼) arrows and the (select) button to choose a Run Tag from the list.
3. Use the (▲), (▼), (▶), and (◀) arrows and the (select) button to edit your Run Tag on the QWERTY keyboard.
4. Press the (next) button, or move to the onscreen checkbox and press the (select) button. Your recording will begin immediately.

Note: If you enable Run Tags in Crystal Control, 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.

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 briefly appear across the peak value indicators. Clearing the peaks will not affect the zero values or the Filter value.
Units
Selecting Units allows you to change the displayed units on any screen. See the module specifications 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 Differential Mode screen, you can switch the units of the differential measurement. When you change the displayed units for a module, the units for that module will change in every screen – except Differential Mode.
Note: (CRYSTGLCONTROL) The unit displayed at the beginning of a recording run remains the default unit for that run. All other units enabled in Crystal Control will be available in Crystal Control’s Data Viewer.

Settings
▶ Adjust Contrast

▶ Lock the nVision
The Screen Lock Password feature will also be found in Settings, if enabled in Crystal Control. Prevent access to your nVision by protecting your device with a 4-digit keypad lockout set in CrystalControl.

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. An invalid code will reject your attempt and allow you to enter another password.
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.

Summary Screen
The Summary screen allows you to view details or settings in your chassis or module.
▶ View a Module Summary

Once you have selected a summary screen, you may also use the (▶) and (◀) arrows to move to the next summary screen.
Press the (Setup) button again to exit the summary screen.
Note: If a BARO module is installed, BARO Module will appear in the Summary drop-down menu list below Lower Module.

▶ Summary Contents
The specific information i n the Summary screens are:
Chassis Summary

– Serial Number
– Firmware Version
– CPLD Version| – Date/Time
– Automatic Shutoff
– Backlight Shutoff| – Logging Interval
– Message Store
– Installed Modules
---|---|---

Module

– Model
– Serial Number
– Firmware Version| – Calibration Date
– Calibration Due
– @ Message Store| – Userspan
– Available Units
---|---|---

Module Specific Information

– Temp. Coefficients (RTD100)
– Base Resistance (RTD100)| – Lead Type (RTD100)
– Zero Limit (PM)
---|---

Recording
▶ Start a Recording
Press the (record) button until the red LED indicator flashes.
▶ View the current Run Tag during a recording

▶ Erase All Runs

A confirmation 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.
SERIAL NUMBERS
All serial numbers can be viewed using the nVision Summary screens or in Crystal Control.
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 REFERENCE RECORDER SPECIFICATIONS
Temperature (Operating and Storage)
Operating & Compensated……. -20 to 50°C (-4 to 122°F).
Strorage. …………… 40 to 75°C (-40 to 167°F).
Humidity
<95% Relative, non-condensing
IP Rating
IP67 rated enclosure (1m immersion for 30 min) per IEC 60529.
Electrical Connection.
Electrical Connection ………… mini-USB B (environmentally sealed chassis connector).
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 be used in the non-hazardous atmosphere with either “Safety Extra Low Voltage Circuits” (SELV) orProtective Extra Low Voltage Circuits” (PELV). The USB connector has a Um of 6V.
SELV and PELV definitions per IEC60079-11 are:
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 satisfies the requirements for SELV.
Note: A 50V center-tapped earth system is a PELV system.
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 fluids, including Skydrol.
Weight: 680g (1.5 Ibs) including one each PM and RTD100 module, 4AA battery module, and protective boot.

Modules

MODULE INSTALLATION INSTRUCTIONS
The nVision’s upper and lower bays allow for removal of modules in the field. 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. Before removing or replacing any modules, ensure that all recorded data has been archived properly through the use of Export Data in Crystal Control.

2. Clean exterior of nVision, if necessary, to ensure no moisture or foreign matter will enter the enclosure when disassembled.

3. Power off 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.  Note: Due the physical form and the IP67 sealing strategy employed, some modules may be difficult to remove. If necessary, connect a fitting 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. Note: If installing a Blank Plate, confirm orientation i s flat 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 first applied the unit will automatically turn on. Ensure that nVision recognizes the new module by confirming in CrystalControl or the Summary screens.

8. Before using the nVision to record, Erase All Data. See Recording in the Chassis chapter.

PRESSURE MODULE (PM) INSTRUCTIONS
Pressure Connection
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.
CPF o-ring size and material: AS568A-012, Viton 90 durometer (P/N 3981).
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 fluid and the o – ring are a concern. Cone seals require only moderate assembly torque to seal up to 10000 psi (700 bar). We recommend a tightening torque of 120 in-Ibs +20 in-lbs for our CPF fittings. Please note this is only a fraction of the typical torque required to seal a 1/4” NPT fitting. If a torque wrench isn’t practical to use, the fittings can be assembled as follows: Hand tighten fitting fully until the cone has bottomed out. Tighten an additional 20° using a wrench. Apply a small amount of media-compatible lubricant to the gland threads and male cone to increase fitting life, reduce the likelihood of galling, and promote sealing.
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 a t 4°C (39.2°F).
CRYSTGLCONTROL) You may require a different water density for your application. CrystalControl allows the user to select the appropriate water density desired at 4°C (39.2°F), 20°C (68°F), or 15.6°C (60°F) temperatures.
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 flashing and the readings will not be reliable, The zero function does not affect when the display starts flashing to indicate overpressure, so depending on the zero value it is possible that the display can start flashing 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).
Overpressure can affect accuracy, but the effect is only temporary unless the sensor has been destroyed. See Pressure Module (PM) Specifications for maximum allowable overpressure ratings.
PRESSURE MODULE (PM) SPECIFICATIONS
Pressure Module Tables

Accuracy (Gauge)
0 to 30% of Full Scale…………… +(0.0075% of Full Scale) or +(0.015% of Full Scale)
30 to 110% of Full Scale………… 5 +(0.025% of Reading) or +(0.05% of Reading)
VACUUM …………………………. For 100 psi / 10 bar / 1 MPa/ 1 0 kg/cm? and lower +(0.06% of Full Scale)
For 300 psi / 30 bar / 3 MPa and 30 kg/cm? +(0.06% of Full Scale) +1 LSD
*Full Scale = -14.5 psig, -1.0 bar, -99.9 kPa, -1.0 kg/cm?

Accuracy specifications include all effects 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 recertification period.
PM modules must be exercised and re-zeroed whenever exposed to significant changes in environmental conditions to achieve these specifications. 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.
Accuracies, Ranges, and Resolutions

▶ nVision Reference Recorder Numbering System

To order the Reference recorder with a single module, enter BNKPLT (blank plate) for either the upper or lower chassis module.
Differential Pressure Measurement Uncertainties without Tare
The total nVision Reference Calibrator measurement uncertainty in the AP mode configuration 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 combinations of combining Pressure Modules (PM) with different accuracy statements. The uncertainties reported below are without using the Tare feature which will greatly improve your measurement uncertainty. Differential 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 specifications apply to the measurement system with a logging interval of 1 reading/second or slower: Differential Pressure Resolution User Defined Units
The nVision gives you the ability to create your own custom User Defined Unit based on pressure. Implement your slope (user factor) and offset (offset factor) in CrystalControl. See CrystalControl application and manual for details.
Pressure Conversions Logging Interval
Fastest Logging Interval………. 10 readings per second
Media Compatibility
Liquids and gases compatible with sensor and CPF fitting system:
Wrench-tight ……………… 316 Stainless Steel
Finger-tight………………… Stainless Steel and Viton (internal MPF o-ring)

BAROMETRIC REFERENCE (BARO) MODULE INSTRUCTIONS
Installation of the BARO module in the power bay allows you to convert your gauge pressure measurement to the absolute scale if so desired. You may also view the barometric reference reading directly on a dedicated numerical screen. When the BARO medule 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
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 factory for updating. You may determine your CPLD version in the Chassis Summary screen or in Crystal Control.

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 (0.11 newton meter (N-m)) torque to secure BARO module properly.

Note: Remember to enable the module in Crystal Control if module is a new installation.
Note: Reset the nVision chassis after enabling or disabling the BARO. BAROMETRIC REFERENCE (BARO) MODULE SPECIFICATIONS
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 specifications include all effects of linearity, hysteresis, repeatability, temperature, and stability within the specified operating temperature range for one year.
Note: Exposure to environmental extremes of temperature, shock, and/or vibration may warrant a more frequent recertification period.
Ranges, Resolutions, and Units
Range …………. 10.153 to 15.954 psiA, 700 to 1100 mbarA
▶ Units and Resolution
psi …………. 0.001
inHg …………. 0.001
mmHg …………. 0.01
mbar …………. 0.1
Logging Interval
Fastest Logging Interval………. 10 readings per second
Pressure Connection
Cylindrical sensor fitting of 5.8mm OD. A flexible 4.8 mm [3/16″] ID tube i s recommended to connection for both nVision chassis forms.
Mounting
BARO Module is secured using 3 / 8 ” 4-40 plastic screw.
WARNING: Plastic non-conductive screw must be used to comply with hazardous locations requirements.
CAUTION: Direct contact with barometric sensor may cause permanent damage. Direct sunlight on exposed BARO sensor may affect readings s l i g h t l y .
ABSOLUTE PRESSURE SPECIFICATIONS

30 psi module
0.200 to 14.500 psiA: +0.011 psiA
14.500 to 44.500 psiA: +(0.025% of Reading)
+ 0,003 psiA
100 psi module
0.200 to 14.500 psiA: +0.011 psiA
14.500 to 44.500 psiA: + 0.011 psiA
44.500 to 114.500 psiA: +(0.025% of Reading)
300 psi module
0.20 to 14.50 psiA: £0.01 psiA
14.50 to 104.50 psiA: + 0.03 psiA
104.50 to 314.50 psiA: +(0.025% of Reading)
1000 psi module
14.5 to 314.5 psiA: + 0.2 psiA
314.5 to 1014.5 psiA: +(0.05% of Reading)
3000 psi module
14.5 to 914.5 psiA: + 0.5 psiA
914.5 to 3014.5 psiA: +(0.05% of Reading)
10000 psi module
*5 to 3015 psiA: + 2 psiA
3015 to 10 015 psiA: +(0.05% of Reading)
15 000 psi module
15 to 4515 psiA: +3 psiA
4515 to 15015 psiA: +(0.05% of Reading)| 3 bar module
0.0138 to 1.0000 barA: +0.0008 barA
1.0000 to 4.0000 barA: +(0.025% of Reading)
+0.0003 barA
10 bar module
0.0138 to 1.0000 barA: +0.0008 barA
1.0000 to 4.0000 barA: + 0.0010 barA
4.0000 to “1.0000 barA: +(0.025% of Reading)
30 bar module
0.014 to 1.000 barA: +0.001 barA
1.000 to 10.000 barA: + 0.003 barA
10.000 to 31.000 barA: +(0.025% of Reading)
100 bar module
1.000 to 31.000 barA: + 0.015 barA
31.000 to 101.000 barA: +(0.05% of Reading)
300 bar module
1.00 to 91.00 barA: + 0.05 barA
91.00 to 301.00 barA: +(0.05% of Reading)
700 bar module
1.00 to 211.00 barA: + 0.11 barA
211.00 to 701.00 barA: +(0.05% of Reading)
1000 bar module
1.00 to 301.00 barA: + 0.15 barA
301.00 to 1001.00 barA: +(0.05% of Reading)
MPaA (Pressure with BARO module)| kg/cm2A (Pressure with BARO module)
300 kPa module
1.38 to 100.00 kP2A: +0.08 kPaA
100.00 to 400.00 kPaA: +(0.025% of Reading)
+0.03 kPaA
1 MPa module
0.00138 to 0.10000 MPaA: +0.00008 MPaA
0.10000 to 0.40000 MPaA: + 0.00010 MPaA
0.40000 to 1.10900 MPaA: +(0.025% of Reading)
3 MPa module
0.0014 to 0.1000 MP3A: +0.0001 MPaA
0.1000 to 1.000 MP3A: +0.0003 MPaA
1.000 to 3.1000 MPaA: +(0.025% of Reading)
10 MPa module
0.1000 tc 3.1000 MPaA: + 0.0015 MPaA
3.1000 to 10.1000 MPaA: +(0.05% of Reading)
30 MPa module
0.109 to 9.100 MP2A: +0.005 MPaA
9.100 to 30.100 MPaA: +(0.05% of Reading)
70 MPa module
0.100 to 21.100 MPaA: +0.011 MPaA
21.100 to 70.100 MPaA: +(0.05% of Reading)
100 MPa module
0.109 to 30.100 MPaA: + 0.015 MPaA
30.100 to 100.100 MPaA: +(0.05% of Reading)| 3 kg/cm² module
0.0141 te 1.0000 kg/cm²A: +0.0008 kg/cm²A
1.0000 to 4.0009 kg/cm²A: +(0.025% of Reading)
+0.0003 kg/cm²A
10 kg/cm² module
0.0141 to 1.0000 kg/cm²A: £0.0008 kg/cm2A
1.0000 to 4.0000 kg/cm²A: + 0.0010 kg/cm?A
4.0000 to 11.0000 kg/cm²A: +(0.025% of Reading)
30 kg/cm² module
0.014 to 1.000 kg/cm²A: +0.001 kg/cm²A
1.000 to 10.000 kg/cm²A: + 0.003 kg/cm²A
10.000 to 31.000 kg/cm²A: +(0.025% of Reading)
100 kg/cm² module
1.000 to 31.000 kg/cm²A: + 0.015 kg/cm²A
31.000 to 101.000 kg/cm²A: +(0.05% of Reading)
300 kg/cm² module
1.00 to 91.00 kg/cm²A: + 0.05 kg/cm²A
91.00 to 301.00 kg/cm²A: +(0.05% of Reading)
700 kg/cm² module
1.00 to 211.00 kg/cm²A: + 0.11 kg/cm²A
211.00 to 701.00 kg/cm²A: +(0.05% of Reading)
1000 kg/cm² module
1.00 to 301.00 kg/cm²A: + 0.15 kg/cm²A
301.00 to 1001.00 kg/cm²A: +(0.05% of Reading)

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 off 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.
4. 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 terminal of the source.
5. Power up circuit and measure or record the readings as appropriate.
6. Never change modes or electrical sources without first 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 configuration may permanently damage your nVision.
• Never exceed the maximum specified 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 fingers are behind the finger guards on the probes.
• Never connect more than two (2) test leads to a MA20 module at a time.

Current Mode
The nVision is capable of measuring current in three different 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%

▶ Current Measurement
The nVision may be used to measure current up to 50mA. Select the desired current mode through the Setup menu to properly configure 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 configure the nVision prior to connection and use. Voltage Mode The nVision may be used to measure voltages up to 28VDC. Select the Voltage mode through the Setup menu to properly configure the nVision prior to connection and use.
Switch Test Mode The nVision may be used to detect switch closures. Select the Switch Test mode through the Setup menu to properly configure the nVision prior to connection and use. The illustration denotes the proper Switch Test connection scheme to the MA20 module.
CURRENT, VOLTAGE, AND SWITCH TEST (MA20) MODULE SPECIFICATIONS

Modes

Current| mA| %4-20, %10-50
Current with HART Resistor| mA| %4-20, %10-50
Voltage| V
Switch Detection| Open| Closed

Connection
2mm banana jacks for sheathed plugs. 12.7mm (0.5 in) spacing.
Terminals Logging Interval
Fastest Logging Interval……. 6 readings per second.
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 specific input entity parameters:

Ui = 28V
li = 93.3mA
Pi = 653.3 mW
Ci = 0.36 uF
Li = 39.1 uH| Uo= 6.6V
lo = 445mA
Po= 7.34mW
Co= 0.5 uF*
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 specifications include all effects of linearity, hysteresis, repeatability, temperature, and stability within the specified operating temperature range for one year.
Note: Exposure to environmental extremes of temperature, shock, and/or vibration may warrant a more frequent recertification period.
▶ Ranges, Resolutions, and Units
Range …………………………. 0 to 55MA (MA20)
Max Allowable Current………..93.3mA
Note: Inputs protected by resettable fuse
Resolution………………….. 0.001MA or 0.01%
Units …………………………. % 4-20, %10-50
▶ mA Input
Input Resistance……………..< 17.20
Voltage Burden @ 50mA ………<0.86V
Voltage Burden @ 20mA ………< 0.35 V
▶ HART mA Input
HART Resistance……………..250Ω

Voltage (V) Input
▶Accuracy
+(0.015% of reading + 0.002VDC)
Accuracy specifications include all effects of linearity, hysteresis, repeatability, temperature, and stability within the specified operating temperature range for one year.
Note: Exposure to environmental extremes of temperature, shock, and/or vibration may warrant a more frequent recertification period.
▶ Ranges, Resolutions, and Units
Range ………………… 0 to 28VDC
Max Allowable Voltage. ………………… 30VOC
Resolution ………………… 0.001VDC
UNITS ………………… MDC
Switch Test
▶ Switch Detection
Switch States ………………… Dry Contact
Closed State Resistance……….< 10Q
Open State Resistance ………..> 10MQ
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 (QO) to help in troubleshooting your resistance based sensing element.
Temperature Coefficient of Resistance (TCR)
Your nVision comes pre-loaded with several common RTD sensing element TCR values with the appropriate Callendar-Van Dusen Coefficients to convert your resistance measurement to the appropriate temperature measurement. The available 1000 platinum RTD TCRs are:

• P1100 (385) Euro
• Pt100 (3911) US
• Pt100 (3926)

Simply select the desired TCR or coefficient values in CrystalControl for use on the nVision. You may also view the Summary page to confirm you have selected the correct setting for your sensing element.
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. RID sensor element connection requirements:
   • 1000 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

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 configuration (see illustration below), and tighten the set screws.
   (e) Confirm correct orientation of element wires in connected state.

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 defined offset to the 100Ω base resistance experienced at 0°C if needed to improve the performance of your sensor.
Differential Temperature
The Tare function also allows you to equalize the differential 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 AT 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 AT reading is zero, Therefore, you will have a much more accurate AT reading than you normally would have if this process was not completed. Note that generally accepted lab practices should be followed when trying to establish a common temperature measurement on two independent sensors.
The Tare should be reestablished every time you are at a new temperature or resistance. For instance if your AT reading has 0.2°C of Tare at 220°C, when you return to ambient conditions this 0.2°C of Tare will remain in place on your AT reading until cleared with the button.
Differential 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 differential temperature measurement (U∆T) you must combine the uncertainties of the upper and lower RTD100 and RTD sensor element systems (Usystem).
Calculate Usystem for the upper and lower RTD100 and RTD sensor element systems:

Calculate the total differential pressure uncertainty:

Differential 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 AT 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 AT reading. Comparing these results would represent the full range of At 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 specifications include all effects of linearity, hysteresis, repeatability, temperature, and stability within the specified operating temperature range for one year.
Note: Exposure to environmental extremes of temperature, shock, and/or vibration may warrant a more frequent recertification period.
Ranges, Resolutions, and Units
Range…………………… 0 to 400Ω for use with 1002 PRT (platinum resistance temperature detectors)
Resolution. ……………..+++.0.01 on all scales
Units ……………………… ºC, K, ºF, R, and Ω
Wiring Types and TCRs
Wiring Types. …………….. 2-, 3-, Or 4-wire
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……………… 3.5 to 5.0mm [0.14 to 0.012 in] with smooth, continuous covering adequate for IP67 sealing
Stranded Conductor Cross Section …….. 0.14 to 0.5mm² [0.0002 to 0.0008 in²]

Logging Interval
Fastest Logging Interval ………………. 5 readings per second.
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 specific input entity parameters:

• 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 particu-lar materials over temperature. Platinum elements have been used for many years in laboratories and industrial processes, and have a reputation for range, linearity, repeatability, and stability. The selection strengths of RTDs, or sometimes called PRT (platinum resistance thermometer) are their wide temperature range (approximately-200 to 850°C), 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 = RO [1 + AT + + CT’ (T-100)] for (-200°C <T < 0°C)
  RT = RO [1 + AT + BP] for (0°C s T s °C of Upper Temperature Range listed below)
  Where: RT = the resistance at temperature, T; RO = the resistance at 0°C; and the constants A, B, and C dependent upon RTD selected (TCR).

nVision (TCR) Temp. Coefficient of Resistance| Temperature Range| Base Resistance| TCR (Ω/ΩºC)| Sensitivity (avg. Ω/C, 0 to 100 °C)| A (°C-1)| B(°C-2)| C (°C-4)
---|---|---|---|---|---|---|---
Pt 100 (385) Euro| -200 to 850°C
(-328 to 1562°F)| 100Ω at 0°C| 0.00385| 0.385| 3.9083 x 10-³| -5.7750 x 10-⁷| -4.183 x 10-¹²
Pt 100 (3926) US| -259 to 1235°C
(-434 to 2255°F)| 100Ω at 0°C| 0.003926| 0.3926| 3.9848 x 10-³| -5.87 x 10-⁷| -4.0 x 10-¹²
Pt 100 (3911)| -259 to 630°C
(-434 to 1166°F)| 100Ω at 0°C| 0.003911| 0.3911| 3.9692 x 10-³| -5.8495 x 10-⁷| -4.2325 x 10-¹²

RTD100 System Measurement Uncertainties
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! (or “root sum squares”) method.
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 defines the temperature versus resistance for 100Q, 0.00385 0/Q/°C platinum RTDs. IEC 751 defines 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 Class| Temperature Deviation| Accuracy at 0°C| Standard
---|---|---|---
Class A| ±(0.15 + 0.002t)°C| 100.00 ± 0.06 Ω| DIN/IEC751
Class B 1| ±(0.3 + 0.005t)°C| 100.00 ± 0.12 Ω| DIN/IEC751

1. We 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% confidence level. The typical method of combining uncertainties is the root sum squares of the individual contributing uncertainties and will be calculated as such for the example shown.

Class A

Class A Uncertainty| nVision + Class A Uncertainty
±Ω| +°C| ±Ω| ±°C
0.24| 0.55| 0.24| 0.55
0.06| 0.15| 0.07| 0.17
0.2| 0.55| 0.21| 0.56
0.33| 0.95| 0.33| 0.96
0.43| 1.35| 0.44| 1.37
0.52| 1.75| 0.53| 1.28
Class B

Class B Uncertainty| nVision + Class B Uncertainty
±Ω| +°C| ±Ω| +°C
0.56| 1.30| 0.56| 1.30
0.12| 0.30| 0.12| 0.31
0.48| 1.30| 0.48| 1.
0.79| 2.30| 0.79| 2.
1.06| 3.30| 1.| 3.
1.28| 4.30| 1.| 4.

POWER

BATTERY POWER
Power Icon States
The nVision Reference screen display has the following power icon states:

Power Icon Key – nVision Reference Recorder

Icon| | | | | |
Description| External Power (USB)| 100%| 75%| 50%| 25%| 0%*
Power Remaining

• Replace Batteries or connect to USB Power
  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 fur- ther 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 power button . After “Replace Batteries” appears, no measurements will be possible until the batteries are replaced, however, the 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.
  Automatic Shutoff Timer and Low Power Mode

The Automatic Shutoff Timer is set in Crystal Control. During normal (non- recording) operation, the nVision will power down when the Automatic Shutoff Timer runs out. The Automatic Shutoff timer will not shut off your nVision while recording. Instead, The Low Power Mode screen will appear after the Automatic Shutoff Timer runs out. To return to normal operation simply press the (select) button.

Extending Battery Life and Low Power Modes
( 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 Shutoff and Backlight Shutoff 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 first reading elapses AND the Automatic Shutoff 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 Shutoff is set separately in CrystalControl. It is unaffected by the Automatic Shutoff 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 im-mediately (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 to maintain your IP67 rating. Failure to properly seal the battery compartment may allow water damage that could permanently compromise the 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.
Battery Power Module (4AA) Specification
Batteries…………………… Four (4) size AA (LR6) batteries.
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:

Duracell MN1500

Replace batteries with approved type in non-hazardous locations only

• Energizer is manufactured by Energizer I loldings, 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 certified only if powered by one of the following battery types:

Replace batteries with approved type in non-hazardous locations only
► Battery Life
Settings such as Auto Shutoff, Logging Interval, and Backlight Shutoff greatly vary battery life.
Standard………………………………… 200 hours (typical) (1 reading per second recording, auto shutoff 20 minutes).
Ultra Low Power …………………………………  60 Days (typical) (2 installed modules, 1 reading per S minute recording interval with Auto Shutoff enabled and 23° C ambient temperature).
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 loomA.
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.
WARNING: Do not remove or change the batteries in a hazardous atmosphere.

Safety and Certifications

HAZARDOUS LOCATIONS
The nVision reference recorder includes the following Intrinsic Safety approvals:
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 Approved Batteries section for more details
SIRA 09ATEX2008X
Intrinsically Safe and Non-incendive for Hazardous Locations: Class I, Division 1, Groups C and D, Temperature Code T4 /T3A /T3B /T3C.
IECEx SIR09.0053X
This product conforms to the following standards:
All module entity parameters may be found under the specific module specification 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 Extra Low Voltage Circuits” (SELV) or”Protective Extra Low Voltage Circuits” (PELV).The USB connector has an Um of 6V.
• 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 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.

CERTIFICATIONS
The nVision has been tested and certified to comply with a variety of international standards.
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 Australian Radiocommunications (Electromagnetic Compatibility) Standard 2008.
**** The nVision is approved for use as a portable test instrument for Marine use and complies with Det Norsjke Veritas’ Rules for Classifi-cation of Ships, High Speed & Light Craft and Offshore Standards.

▶ Safety Instructions for Hazardous Locations

• 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:

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.

Support

TROUBLESHOOTING
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 fluids
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 significant 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 fluid is acting like a spring. At higher pressures (above 2000 psi, typically) this may eventually diminish, as the gas dissolves into the fluid.
► Solution
Evacuate all tubing with a vacuum pump before introducing fluid 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 fluid. When decreasing the pressure, the dissolved gas then leaves the fluid, but at an uneven rate, so a small pressure differential (due to fluid head pressure) may exist between the reference deadweight and the gauge being tested.
► Solution
Evacuate all tubing with a vacuum pump before introducing fluid into the system.
Slow return to zero and/or non-repeatability of pressure measurements
► Reason
Pressure port is obstructed.
► Solution
Clean with low pressure fluid. Do not touch diaphragm as damage will result.
Error 1 displayed
► Reason
The nVision checks the integrity of internal calibration coefficients every time it’s turned on. If any coefficients have been corrupted in any way,’Error ‘ 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.
Date and Time are incorrect
► Reason
The nVision has its date and time synchronised to computers located in our factory.
► Solution
Connect to Crystal Control on a computer with the correct date and time settings you desire. During the connection process, the nVision will be synchronized to the local time.
CALIBRATION
If adjustment is required, we recommend returning the nVision or separate modules to the factory. Factory service offers benefits you won’t find anywhere else. Factory calibration tests your nVision at a variety of temperatures utilizing NIST traceable standards, resulting in calibration certificates 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 features. We designed the product to last, and we support it so that you can get the most from your investment.
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 prefer that you return the nVision to us for calibration, ordinary recertification and/or adjustments may be performed by any qualified person- nel with appropriate training and equipment. The following instructions are ONLY intended for such qualified personnel with appropriate test equipment. We recommend that the calibration standards used have a minimum rated accuracy of 0.008% of reading, or equivalent in terms of percent of full scale. This level of accuracy requires the use of piston (deadweight) gauges or very high performance pressure controllers.
There are no internal potentiometers. The nVision contains a “span “factor (userspan), set to approximately 1 (as shipped from the factory). 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 Crystal Control.
Calibration for Pressure Modules (PM)
“Zero “the nVision, then record displayed pressure for two or more pressure points. Determine if the nVision would benefit from an overall increase or decrease of the indicated pressures. Adjust userspan accordingly and validate results.
Calibration for Barometric Reference Module (BARO)
The BARO module can be calibrated by selecting the Edit Calibration Data button while within the BARO Config screen. Enter Userspan and Offset 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 flexible 4.8mm (3/161 ID tubing from your clean pneumatic calibration reference directly to the BARO sensor.

CAUTION: Do not subject the BARO sensor to pressures less than 700 mbarA (10.153 psiA), or greater than 1100 mbarA (15.954 psiA), as this may cause permanent damage. Use only clean a clean dry pneumatic source.
CAUTION: Direct contact with the surface of the BARO sensor may cause permanent damage. Direct sunlight on exposed BARO sensor may affect readings slightly.
Calibration for Current, Voltage & Switch Test Module (MA20)
The MA20 can be calibrated through the use of the span factor (userspan) and the Offset for the current and voltage modes. Record dis-played current or voltage for two or more points. Determine if the nVision would benefit from an overal increase or decrease of the indicated reading and modify using the userspan and offset feature of Crystal Control.
To setup the Switch Test feature, select the Setup Wizard button in the MA20 Module Config screen and follow the instructions.
Calibration for Temperature Modules (RTD100)
The RTD sensor can be calibrated through the use of the span factor (userspan) and the Base Resistance (Ro) at 00C. Record displayed temperature for two or more temperature points. Determine if the nVision would benefit from an overall increase or decrease of the indicated temperatures and modify using the userspan feature in Crystal Control. It is also possible to modify the RTD sensor resistance reading at 0 to a custom value other than the default value of 100 0 using the Base Resistance (Ro) at 00C in Crystal Control. Note, however, that the Ro offset will affect all RTDs used with the nVision and should be used with care.
ACCESSORIES AND REPLACEMENT PARTS
P/N 4547 BARO Calibration Kit
Includes 3/1e calibration hose with fitting coupler.
P/N 6053 Soft Carrying Case
Durable, padded case with separate pockets for your nVision and accessories.
P/N 3951 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 3952 Test Lead Kit (included in MA20)
Two 39″ (1 m] 2mm banana jack test leads with multi-purpose clip. Black/ Red.
P/N 3953 RTD Connection Kit (included in RTD100)
One IP67 terminal block connector (RTD Module or RTD Sense Element not Included).
PIN 3985 Protective Boot
Skydrolw resistant protective boot. Blue.
TRADEMARKS
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 specific legal rights and you may have other rights which vary from state to state.

4701.R 2112
1.888.610.7664
www.calcert.com
sales@calcert.com

References

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