Refco REF-CLASS-GAUGE Installation guide

1
REF-CLASS-GAUGE
Installation and operating guide
Installations- und Bedienungsanleitung
Guide d’installation et d’utilisation
Istruzioni per l’installazione e l’uso
Guía de instalación y funcionamiento

Installation and operating guide English
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Contents
General information...................................................................................................... 1
Safety ............................................................................................................................. 3
Specifications................................................................................................................ 4
Design and function...................................................................................................... 5
Transport, packaging and storage............................................................................ 11
Commissioning, operation......................................................................................... 12
Maintenance ................................................................................................................ 15
Troubleshooting.......................................................................................................... 16
Return and disposal.................................................................................................... 17
Warranty....................................................................................................................... 17
Spare parts and accessories ..................................................................................... 17
General information
Congratulations on purchasing a REF-CLASS GAUGE, the REFCO precision pressure
generation device. The REF-CLASS GAUGE is produced in accordance with the latest
findings. All components are subject to strict quality and environmental criteria during
production. Our management systems are certified in accordance with ISO 9001 and
ISO 14001. This operating manual contains important information about handling the
REF-CLASS GAUGE. Safe operation of the device requires adherence to all safety
information and operating instructions. Comply with the applicable local accident
prevention regulations and general safety provisions for the area of use of the REF-
CLASS GAUGE. This operating manual is an integral part of the product and must be
kept in the immediate vicinity of the REF-CLASS GAUGE and readily accessible at all
times to qualified personnel. The qualified personnel must have carefully read and
understood the operating manual before starting any work. The manufacturer's liability
is void in the event of any damage due to improper use, non-adherence to this
operating manual, assignment of insufficiently qualified personnel, or unauthorized
modifications to the REF-CLASS GAUGE. The general terms and conditions in the
sales documentation shall apply. We reserve the right to make technical modifications.

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Abbreviations and symbols used
Warning!
Indicates a potentially hazardous situation that can lead to death or
serious injuries if not prevented.
Caution!
Indicates a potentially hazardous situation that can lead to moderate or
slight injuries if not prevented.
Note
Information on preventing material damage.
Tip for easier operation.

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Safety
Proper use
The REF-CLASS GAUGE can be used as a calibration device and for any purpose for
which highly precise pressure measurement is required. The REF-CLASS GAUGE is
designed and built solely for the intended use described here and may only be used
accordingly. The technical specifications in this operating manual must be adhered to.
The REF-CLASS GAUGE must be handled with the required care (protect against
moisture, impact, strong magnetic fields, static electricity, and extreme temperatures,
do not insert objects into the device or openings). Protect plugs and sockets from dirt.
If the REF-CLASS GAUGE is transported from a cold to a warm environment,
condensation may affect the functioning of the device. Wait until the temperature of the
device reaches the room temperature before switching it on again. Any claims due to
improper use are excluded.
Qualified personnel
The REF-CLASS GAUGE may be used only by qualified personnel. Qualified
personnel can carry out the work described and identify potential hazards due to their
technical training, knowledge of measuring and control technology, and experience
with and knowledge of the country-specific regulations and applicable standards.
Special conditions of use require additional relevant knowledge, e.g. about aggressive
media.
Warning!
If the REF-CLASS GAUGE is overloaded or subjected to a sudden jolt
(e.g. from dropping), it must undergo a safety check for damage. If in
doubt, the REF-CLASS GAUGE can be returned to REFCO for
assessment. The REF-CLASS GAUGE is not designed for use with
flammable substances and may be used only in locations with the
corresponding protection against penetration of foreign bodies or water
that could impair safety.
Note
If the message "OL" appears, the measurement range has been
exceeded and the pressure source must be removed immediately from
the REF-CLASS GAUGE to prevent damage to the internal pressure
transducer.

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Specifications
Property
Value
Weight (without case)
approx. 1.7 kg
Weight (with case)
approx. 3.3 kg
Case dimensions
440 x 125 x 365 mm
Overload pressure limit
80 bar (relative pressure)
Accuracy
+/- 0.1% FS
+/- 0.05% FS at a measurement rate of
3 measurements per second (see
menu: Rate)
Compensated temperature range
-10…+50 °C (14…122 °F)
Battery service life (without backlight)
2000…2500 h
Measurement range (relative pressure)
-1…40 bar
Nameplate
The nameplate is located at the back of the precision digital manometer.
① Product name
②Ordering code
③ Accuracy
④Manufacture date
⑤Serial number
⑥Pressure measurement
range
Devices with this label comply with the applicable European directives.
This label on devices indicates that they may not be disposed of in
household waste. They must be disposed of by returning them or taking
them to the respective municipal sites. See EU Directive 2002/96/EC.
Connections
The REF-CLASS GAUGE has a G ¼" internal thread as a pressure connector for the
test specimen. Different adapters may be needed to connect to the pressure reference
standard. The hose, the lines, and screw connections etc. must be approved for at
least the working pressure that corresponds to the device pressure. In addition, there
may be no leaks when conducting calibration. Connectors may have to be sealed with
Teflon tape.

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Design and function
The REF-CLASS GAUGE consists of a precision digital manometer and a manual test
pump. The REF-CLASS GAUGE is used for generating pressure for the purpose of
checking, adjusting, and calibrating mechanical and electronic pressure measurement
devices using comparison measurements. The pressure generated by the manual test
pump can be read on the precision digital manometer. For exact setting that allows for
a precise comparison measurement, the manual pump has a fine adjustment valve.
Position
Description
①
Precision digital manometer
②
Fine adjustment valve
③
Pressure relief valve
④
Changeover valve (switch pressure/vacuum generation)
⑤
Pump handles
⑥
Adjustable knurled nut for setting the pump stroke
⑦
Pressure connector for the test specimen
⑧
Hose line for connecting test specimens

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Display
Position
Description
①
Warning symbol
The symbol lights up when
- Values are above or below the pressure range
- Values are above or below the temperature range
- The logger memory reaches 90% capacity
- A device error occurs or battery charge is < 10%
②
Log (optional)
Active logger function
③
Battery charge display
The battery symbol is permanently lit; each segment indicates 20%
battery capacity
④
Pressure display
The 5 ½-digit, 7-segment display always shows the current pressure. If
the pressure value is no longer current, dashes are displayed (for 10 s in
low-power mode)

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⑤
Matrix field
The matrix field consists of 4 x 21 cells (rows and columns) and functions
as a menu and secondary display.
⑥
ON/OFF button / Home button
Main function: Switching the precision digital manometer on and off
(press for min. 3 seconds)
Secondary function: Return to the home screen from the menu (press
briefly)
⑦
MENU button / Right and left arrow
Main function: Entering into menu mode
Secondary function: If the button is pressed and held in the menu mode,
the cursor turns around after 2 seconds (right ◀or ▶left). Entries are
confirmed with the MENU button.
⑧
LIGHT button / Down arrow
Main function: Switching the backlight on and off
When the light button is activated (press briefly or press and hold), the
light is switched on. The duration of the light depends on the settings in
the menu mode.
Press the LIGHT button once (Light = On)
Press the LIGHT button twice (Light = Off)
Secondary function: In menu mode, the cursor can be moved
downwards by pressing the light button briefly.
⑨
ZERO button / Up arrow
Main function: By pressing and holding, the current pressure is set to "0"
(rel.) or to the reference pressure (abs.).
By activating the ZERO button, the current pressure is set to "0".
Maximum 5% of the measurement range can be corrected.
Secondary function: If the REF-CLASS GAUGE is in menu mode, the
cursor can be moved upwards by briefly pressing the ZERO button.
⑩
Bar graph
The bar graph shows the current pressure in proportion to the
measurement range as a graph. It consists of 20 segments and two
triangles at the ends. The first triangle lights up if the measuring range is
not reached, the last triangle if it is exceeded.
⑪
Password protection (optional)
⑫
Wireless (optional)
⑬
Tare
Active TARE function

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Menu options
Menu level 1
Menu level 2
Menu level 3
Measuring mode
Unit*
Peak values*
Temperature*
Tare*
Mean value*
Rate*
Resolution*
Damping*
Measuring rate*
Alarm*
Level*
Logger
Start/Stop
Interval
Duration
Start time
Clear last
Clear all
Default
Wireless
Language
Switch-off time*
Light off
Contrast
Time
Time format
Date
Date format
Factory reset
Info
S# (e.g.: 1A00023458) = Serial number
T# (e.g.: ABCDEFG12345) = Tag number
MB: (e.g.: 0…100 bar) = Measurement range
HerstDat. (e.g.: 10/05/2016) = Date of manufacture
KalibDat. (e.g.: 10/05/2016) = Date of calibration
Firmware
Memory status
Op. hrs
O. pressure
O. temp
* See menu settings

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Menu settings
Unit
The REF-CLASS GAUGE is factory preset to the pressure unit "bar" or "psi". In the
units menu, the device can be switched to 31 predefined pressure and fill level units
and three user-specific units.
Peak values
The REF-CLASS GAUGE saves the minimum and maximum pressure in the
memory (independently of any selected tare value). The peaks menu allows the
display of the minimum and maximum pressures measured.
Temperature
The REF-CLASS GAUGE is temperature compensated. This menu allows the
display of the temperature measured by the internal sensor. The temperature can be
displayed in degrees Fahrenheit or Celsius using the arrow buttons.
Tare
With this option, a constant offset value can be set. For example, if tare is set to 30
bar and a pressure of 37 bar is measured, 7 bar is displayed as the measured value.
A pressure of 27 bar would be displayed as -3 bar. The TARE value is manually set
with the LIGHT and ZERO buttons and depends on the technical measurement units
and the resolution selected for display. The TARE value can be set for the maximum
display range. The bar graph always shows the actual pressure depending on the
entire measurement range, independent of the TARE setting. This is done for safety
reasons, so that even when "0" is displayed, it is obvious that the pressure gauge is
under the corresponding pressure.
Mean value
With this function, the mean value of the pressure measurements for an individually
specified unit of time can be displayed.
Rate
With this setting, the current increase or decrease in pressure per time unit can be
displayed.
Resolution
In the resolution menu, the number of digits displayed can be set.
Damping
In this menu, the damping of the pressure display on the REF-CLASS GAUGE can
be set. One of three different predefined filter settings can be selected. If "OFF" is
selected, the filter is inactive.
Measuring rate
In this menu, the number of pressure measurements per time unit can be set. The
measuring rate affects the accuracy of the pressure measurement device (see
specifications: accuracy).

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Alarm
With this setting, a pressure range can be defined. The alarm flashes if values
outside this range are measured.
Level
The REF-CLASS GAUGE can calculate the fill level from the pressure and density
of the medium. In the level menu, the density of the medium can be defined. To
display the fill level, switch to the units menu and select the desired unit of length for
the fill level.
Switch-off time
The duration until automatic shut-off can be set in four predefined intervals ("5 min",
"15 min", "30 min" or "OFF"). If "OFF" is set, the device remains active until it is
switched off by the ON/OFF button or the battery is empty.
If a time is set, the REF-CLASS GAUGE runs for this time after the last operation
and then switches off automatically.

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Transport, packaging and storage
Note
Before putting the REF-CLASS GAUGE into storage (after operation),
any residue from measuring medium must be removed. This is especially
important if the measuring medium is hazardous to health.
Transport
Transport the REF-CLASS GAUGE only in the plastic case provided for this purpose.
Packaging
The original packaging provides optimal protection against damage. Transport the
REF-CLASS GAUGE only in the original packaging.
Storage
Store the REF-CLASS GAUGE only in the original packaging.
Permissible conditions for storage:
- Storage temperature: -20 °C … +70 °C
- Humidity: 0-90% relative humidity (no condensation)

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Commissioning, operation
Initial commissioning
Note
Do not use sharp tools to remove the protective film on the display. The
display could be scratched.
- Open the REF-CLASS GAUGE case.
- Check the contents of the case for completeness (see scope of delivery).
- Take the REF-CLASS GAUGE out of the case.
- Carefully peel the protective film off the display of the REF-CLASS GAUGE.
- Remove the yellow plastic stopper from the pressure connector for the test specimen;
it can then be disposed of.
Normal operation
Press and hold the ON/OFF button to activate the precision digital manometer. Press
the button again to switch it off. After switching it on, the start screen with the pressure
range and firmware version is displayed for approx. 3 seconds.
Resetting the display to 0: Press and hold the ZERO button.
The precision digital manometer must be set to 0 using the ZERO button prior to every
use.
For maximum efficiency, the spring above the knurled
nut with counter nut must have just a bit of play (see
image at the right). When testing test specimens or
reference devices with a small measurement range, you
can shorten the stroke distance by moving the knurled
nut and counter nut upwards. This will result in a lower
pressure or vacuum generated each time the handles
are squeezed and minimize the risk of accidentally
creating overpressure. Afterward, return the knurled nut
and counter nut to the optimal position.

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Generating pressure
Warning!
Never activate the changeover valve when the manual test pump is under
pressure or vacuum! Switch over only when the relief valve is open.
Warning!
Do not disassemble the REF-CLASS GAUGE or the test specimen until
the relief valve is open and there is thus no longer pressure in the manual
test pump.
Before generating pressure, the changeover valve may need to be activated (see
sticker on the pump) using a pen or a small screwdriver.
- Attach a suitable adapter if necessary to connect the test specimen to the REF-
CLASS GAUGE.
- Connect the test specimen to the pressure connector for the test specimen. Ensure
seal tightness of the connection.
- Ensure that the pressure relief valve is slightly open.
- Switch on the display of the REF-CLASS GAUGE.
- Screw the fine adjustment valve out counterclockwise almost completely until slight
resistance is felt (the thread becomes very smooth-running shortly before the "stop").
- Screw the pressure relief valve in clockwise cautiously until the valve closes. No "hard
stop" is felt here.
- Pump the manual test pump until the approximate desired pressure is reached,
however, generally not more than 20 ... 25 bar.
- Turn the fine adjustment valve clockwise to increase pressure or counterclockwise to
reduce pressure until the exact desired pressure is reached (can be seen on the
REF-CLASS GAUGE display).
You can reduce pressure by first turning the fine adjustment valve
counterclockwise and then cautiously turning the pressure relief valve.

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Generating a vacuum
Warning!
Never activate the changeover valve when the manual test pump is under
pressure or vacuum! Switch over only when the pressure relief valve is
open.
Before generating a vacuum, the changeover valve may need to be activated (see
sticker on the pump). Use a pen or a small screwdriver to do this. The covering of the
switch valve should prevent unintentional activation.
- Attach a suitable adapter if necessary to connect the test specimen to the REF-
CLASS GAUGE.
- Connect the test specimen to the pressure connector for the test specimen. Ensure
seal tightness of the connection.
- Ensure that the pressure relief valve is not completely closed.
- Screw the fine adjustment valve in clockwise almost completely until slight resistance
is felt.
- Screw the pressure relief valve in clockwise cautiously until the valve closes (no "hard
stop" is felt).
- Pump the manual pump cautiously and slowly until a vacuum up to approx. -0.9 bar is
reached.
- Screw the fine adjustment valve out counterclockwise to increase the vacuum
generated to -0.95 bar or set it precisely.
You can reduce the vacuum by opening the pressure relief valve carefully.
After increasing the pressure or vacuum, the display may continue to rise
slightly for about 30 seconds. This is due to thermodynamic effects, the
hose connection, and seals. Regulate the test pressure carefully and
slowly with the manual test pump as needed. If the pressure does not
stop increasing, check the measuring circuit for seal tightness.

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Maintenance
Repairs are to be performed only by authorized dealers. Before connecting the
reference device and the test specimen, the seals at both connections must be
checked for proper fit and wear and tear and replaced if necessary. A maintenance kit
consisting of O rings and seals is available as an accessory. The manual test pump
may not be dirty and in particular may not come into contact with damp, wet, or
aggressive media.
Calibration
The REF-CLASS GAUGE is delivered ex works with an inspection certificate for
calibration 3.1 according to EN 10204. We recommend calibrating the REF-CLASS
GAUGE once a year.
- SCS calibration certificate (optional) order no. REFCO 4686826
Changing the battery
- Switch off the REF-CLASS GAUGE and lay it on its front side.
- Pull the rubber protective cap over the back side of the precision
digital manometer until the battery cover is freely accessible (see
image at the right).
- Loosen the screws on the battery cover (see image at bottom right).
- Remove the battery cover and take the empty batteries out of the
battery compartment.
- Ensure proper polarity when inserting the new AA batteries.
- Replace the battery cover.
- Tighten the screws of the battery cover, starting with the top screw.
- Put the rubber protective cap back on the precision digital
manometer.

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Cleaning
Caution!
Before cleaning, ensure that there is no pressure or vacuum in the
device. To do this, open the pressure relief valve to allow pressure or
vacuum to escape.
Note
Do not use any aggressive cleaning agents that could damage the REF-
CLASS GAUGE.
Note
Do not allow any electrical connections to come into contact with
moisture ‒ risk of short-circuit.
Clean the outside of the REF-CLASS GAUGE regularly with a soft damp cloth and a
mild cleaning agent when necessary. Dry the REF-CLASS GAUGE completely after
every cleaning.
Troubleshooting
Problem
Possible cause
Pressure or vacuum
cannot be generated or
does not remain stable.
- Seals are not fitted properly or do not fit.
- Adapters for the pressure connector are not properly
tightened.
- Relief valve is not closed.
- Changeover valve is not clearly set.
The display of the REF-
CLASS GAUGE shows
nothing or only
meaningless symbols or
does not react when a
button is pressed.
- Battery is empty.
- Power supply operation: incorrect voltage/polarity.
- System error -> Switch off device, wait briefly,switch
on again.
- REF-CLASS GAUGE defect -> Send device in for
repair.
The precision digital
manometer displays OL or
-OL.
- The measurement range is exceeded or not reached.
Check whether the pressure is within the permissible
measurement range of the sensor.
The REF-CLASS GAUGE
cannot be set to 0.
- When the ZERO button is activated, the actual
pressure is set to "0". Maximum 5% of the
measurement range can be corrected in this way. For
larger corrections, use the Tare function.

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Return and disposal
Dispose of faulty rechargeable / spent batteries in accordance with the applicable local
regulations. At the end of its useful life, the product must be sent to a collection point
for electric and electronic devices (observe local regulations).
Warranty
Your new REF-CLASS GAUGE has been developed in accordance with the latest
occupational health and ergonomic requirements and reflects the latest state-of-the-art
technology. REFCO Manufacturing Ltd has been certified in accordance with DIN EN
ISO 9001. Regular quality control checks as well as an accurate manufacturing
process guarantee reliable functionality and are the basis for the REFCO guarantee, in
accordance with the General Terms and Conditions of Sale and Delivery applicable on
the day of delivery. Damages arising from obvious improper handling or wear are
excluded from the guarantee.
Spare parts and accessories
Description
Article name
Order number
Spare hose for reference
manometer
REF-CLASS GAUGE 02
4683728
Complete adapter set
REF-CLASS GAUGE 03
4686845
Spare rivets for the CPP30
handle
REF-CLASS GAUGE 04
4686916
Handle mechanism CPP30
REF-CLASS GAUGE 05
4686923
Maintenance set CPP30
REF-CLASS GAUGE 06
4687288
Sealing set for adapter
REF-CLASS GAUGE 07
4687776