KPFM X2 User manual

X2 & X4
PRESSURE GUAGE KITS
USERS MANUAL

Operation and Maintenance Manual
Introduction
This series of gauges is designed for use on today’s modern heavy equipment machinery.
They are tough, water resistant, and easy to use. What makes these gauges better than
conventional digital gauges is that they are wireless and can display pressure differential as
well as individual pressures.
The wireless function is accomplished with the use of a 915MHz RF module, which is
powerful enough to be hundreds of meters away even when the transmitter is locked in the
pump compartment. To ensure accuracy and stability these reading are taken seven times,
averaged, and sent to the display every half second.
Safety Information
•Read all safety information before you use the Product.
•Carefully read all instructions.
•Do not alter the Product and use only as specified, or the protection supplied by the
Product can be compromised.
•Battery:
•The battery door must be closed and secured before you using the Product.
•Replace the batteries when the low battery indicator shows to prevent incorrect
measurements.
•To avoid leakage remove the batteries if the unit is to be stored for extended
periods of time of if stored in high temperature areas (over 50 °C).
•Repair the Product before use if the battery leaks.
•Be sure that the battery polarity is correct to prevent battery leakage.
•If the Product is exposed to overpressure or sudden physical shock (such as a drop),
examine the Product for damage that can cause a safety concern. If necessary, return
the Product to KPFM for evaluation.
•Always apply thread seal tape or liquid to the threads of the gauge.
•Do not over torque the test port fittings. Maximum torque allowed is 34 Nm = 25 ft lbs.
•Hydraulic Pressure:
•Fluids and gasses under pressure can cause serious injury or death
•Use all appropriate PPE for the Fluids and pressures you are working with.
Including but not limited to gloves and safety glasses
•Never connect or disconnect fittings under pressure
•For directions on how to bleed down the pressure on component to be tested
consult the appropriate manufactures manuals.
•Never check for Hydraulic leaks with your hands. High pressure can cut the skin

or inject itself into the blood stream. Causing injury or death
•While the transducers are rated for 10000psi most test fittings are not. Check if
the fittings you are using are appropriate for the pressures being tested
Component list
1. Receiver/Display Unit
2. Transmitter Unit
3. Pressure Transducers
4. Extension Cables
1. Receiver/Display Unit
•The Receiver/Display unit receives signals from the transmitter and displays them on a
colour LCD screen.
•This unit also tracks the minimum/maximum and will calculate the differential between
the sets of readings (see button function section).
•The expected line of site range is about 200 meters.
•Each unit is paired with the transmitter that it was shipped with and will not pick up the
signals of other transmitters.
2. Transmitters Unit
•Each transmitter will read the pressures from 2 transducer at the same time and send

the signal to the receiver.
•Readings are taken every half second, converted to psi, and transmitted.
•In that half second cycle there are 11 readings taken, the 2 high and 2 low are
dropped, and the remaining 5 are averaged for maximum stability .
•The connecting cables are RF shielded and use a standard 4 wire Deutsch DTM
connector.
3. Transducers
•The standard transducers that are used are rated for 10000psi.
•Each gauge has been calibrated to the transducers shipped with it.
•If other transducers are used we cannot guarantee the accuracy.
•The pressure chamber is made of 17-4PH stainless steel.
•Do not use these gauges on liquids or gasses that may react with this metal.
4. Extension Cables
•Cables are made up of 4 element shielded wire.
•The cables are capable of withstanding cold temperatures and continuous flexing.
•The ends are a standard 4 wire Deutsch DTM connector.
Storage Cases
•Storage cases are provided to ensure the kit is field ready when it arrives.
•Smaller cases for the transducer are also provided to keep the oil that may be on the
transducers away from the electronics.
Operation
Button and LED function
LEDs
•The Power button is LED backlit
and comes on about 1 second
after the button is pressed. This
indicates that the CPU has
started up and is working properly
•The Transmit and Receive LEDs
will flash once for each packet
sent or received.

Buttons
•Power: Turns the unit power on or
off.
•Unit: Changes the unit that the
values are displayed in. The
standard available units are PSI,
kg/cm2, kpa, Mpa and bar.
•Zero: Sets all values to zero and
resets the Minimum and
Maximum values as well.
•Backlight: Changes the backlight
on the LCD screen between High,
Medium,and Low
Receiver Displays
X2 Kit Receiver Display
1. Battery level indicator for
receiver unit
2. Battery level indicator for
transmitter unit
3. Signal strength indicator
4. Current readings
5. Mode indicator area
6. Current unit display
7. Min/Max or differential display
area

X4 Kit Receiver Display
1. Battery level indicator for
receiver unit
2. Battery level indicator for
transmitter unit
3. Signal strength indicator
4. Current readings
5. Mode indicator area
6. Current unit display
Set up and use
•When connecting and disconnecting components always depressurize the system first.
•Connect the Transducers to the desired test points on the machine.
•Connect the transmitters to the transducers matching the colours. Use the extension
cables if required to reach the desired test points.
•Turn on the power to the transmitter or transmitters if using the X4 kit.
•Turn on the power to the Receiver.
•After the start up is done (about 3 seconds) the reading should be displayed.
•Zero the reading if required (see Button Function section).
•Start the machine and operate as required by the machine manufacturer for testing.
Maintenance
Cleaning
•While the units have been designed to be tough and water resistant the best practice is
to clean with a damp rag and mild soap as required.
•Do not expose to water or cleaners when the battery compartment is open.
•Allow the components to dry completely before returning them to the storage cases.
Storage
•Store in a dry place in the cases provide.
•Unit should be stored at temperatures between -30 and +40°C.
•Storing at high or low temperatures will affect the batteries. Check with the

manufacture of the batteries for their recommendations.
•If stored for long periods of time the batteries should be removed.
Changing batteries
•Only change the batteries in a clean and dry environment. The inside of the battery
compartment is not sealed off from the electronics.
•Turn the unit over and remove the two screws visible on the small cover.
•Remove the old batteries by lifting up on one end. Use a pick if necessary.
•Install the new batteries as per the diagram etched into the battery compartment.
•This procedure is the same for both the transmitter units and the receiver; however the
transmitters use 3 AAA batteries and the receiver uses 3 AA batteries.
Calibration requirements
•These gauges are subject to drift over time as are all gauges.
•The maximum expected drift is +-0.25% per year.
•The frequency for recalibration varies with the application and the users requirements.
•KPFM’s preference is to have the gauges recalibrated every three years.
•NIST traceable testing and setup can be done on request for an additional charge.
Gauge Specifications
Micro-controllers:
•Atmel ATMega328P
•Max. Operating Freq. (MHz): 20 MHz
•16 bit, 4 channel analog to digital convertor
RF module:
•Hope RFM69HCW
•RF output: 100 mW power output at 900 MHz
•Sample rate: 7 readings every 1/2 second

LCD:
•TFT colour display: 320x240 resolution
•Transducers: 0 - 10,000 psi + - .25%
•Battery life: about 13 Hrs at 20°C
Transducers:
•±0.25% Accuracy
•±1.0% Total Error Band
•Compact Outline
•-40°C to +125°C Operating Temperature
•Temperature compensated -20°C to +85°C
Size:
•Receiver 210x100x32mm
•Transmitter 147x89x24mm
Weight:
•Receiver 285g
•Transmitter 210g
•Total kit weight including fittings and batteries for the X2 Kit is 3.6kg and the X4 Kit is
5.5KG
Contact KPFM at [email protected]mor 1-250-462-0042