KS KMPS-1-64 Series User manual

KMPS-1-64 Manual
12/18 KM 8000 Rev. A Page 2 of 40
Copyright © 2018 Kulite Semiconductor Products, Inc.
All Rights Reserved.
Contents
1 Specifications.................................................................................................................................. 4
1.1 Electrical Connector ............................................................................................................... 5
1.2 Part Numbers ......................................................................................................................... 6
2 Theory of Operation ....................................................................................................................... 7
2.1 Internal Connections .............................................................................................................. 8
2.2 Temperature Compensation .................................................................................................. 9
2.3 Pressure Output ..................................................................................................................... 9
2.4 Temperature Output ............................................................................................................ 10
2.5 Analog Output ...................................................................................................................... 10
2.6 Trigger................................................................................................................................... 10
3 Communication ............................................................................................................................ 10
3.1 RS-485 Communication ........................................................................................................ 11
3.2 Ethernet Communication ..................................................................................................... 11
3.2.1 UDP vs TCP.................................................................................................................... 12
3.2.2 Command List............................................................................................................... 12
3.2.3 Wrong Subnet............................................................................................................... 14
3.3 PTP........................................................................................................................................ 14
3.4 Command list........................................................................................................................ 14
3.5 MODBUS............................................................................................................................... 17
4 Using the KMPS ............................................................................................................................ 17
4.1 Modes................................................................................................................................... 17
4.2 Data Output Format ............................................................................................................. 17
4.2.1 TExt format ................................................................................................................... 18
4.2.2 TExt PErcentage format................................................................................................ 18
4.2.3 BInary format................................................................................................................ 19
4.2.4 BInary TEmperature format ......................................................................................... 19
4.2.5 BInary PErcentage format ............................................................................................ 19
4.2.6 IENA .............................................................................................................................. 19
4.3 Header Information.............................................................................................................. 20
4.4 Multi-Range Modules ........................................................................................................... 21
4.5 Channel Selection ................................................................................................................. 21
4.6 Pressure Data Rate ............................................................................................................... 22
4.7 Temperature Data Rate........................................................................................................ 22
4.8 Default Mode........................................................................................................................ 23

KMPS-1-64 Manual
12/18 KM 8000 Rev. A Page 3 of 40
Copyright © 2018 Kulite Semiconductor Products, Inc.
All Rights Reserved.
4.9 User Data Storage................................................................................................................. 23
4.10 Calibration ............................................................................................................................ 23
4.10.1 Auto-Zero...................................................................................................................... 23
5 Maintenance ................................................................................................................................ 23
5.1 O-Ring Maintenance............................................................................................................. 24
5.1.1 Module O-rings............................................................................................................. 24
5.1.2 Top Plate O-rings .......................................................................................................... 25
5.2 Other Maintenance .............................................................................................................. 25
5.2.1 Lubricate Purge Bock .................................................................................................... 25
5.3 Training................................................................................................................................. 26
APPENDIX A .......................................................................................................................................... 27
APPENDIX B .......................................................................................................................................... 31
APPENDIX C .......................................................................................................................................... 35
APPENDIX D .......................................................................................................................................... 36
APPENDIX E........................................................................................................................................... 40
List of Tables
Table 1: General Specification ................................................................................................4
Table 2 : Electrical Connector for RS485 KMPS-1-64-XX-R...................................................5
Table 3 : Connections for Ethernet KMPS-1-64-XX-E ............................................................5
Table 4 : Units Commands....................................................................................................10
Table 5 : RS485 Commands................................................................................................11
Table 6 : Ethernet Commands ..............................................................................................14
Table 7 : General Commands ...............................................................................................17
Table 8 : IENA Commands....................................................................................................20
Table 9 : Channel Parsing Example......................................................................................21
Table 10 : Sample rate commands .......................................................................................22
Table 11: IENA 64 Packet Format.........................................................................................32
Table 12: KMPS Status Word A............................................................................................33
Table 13: KMPS Status Word B............................................................................................34
Table 14 MODBUS/TCP Holding Registers..........................................................................38
Table 15 MODBUS/TCP Input Registers ..............................................................................39
List of Figures
Figure 1: Figure 1: Block Diagram of Scanner Electronics.....................................................7
Figure 2: Drawing of top of KMPS-1........................................................................................8
Figure 3: Schematic Diagram of internal Piping of KMPS-1....................................................9
Figure 4: Removing Modules ................................................................................................24
Figure 5: Module with O-rings...............................................................................................25
Figure 6: Removing Top Plate Screws..................................................................................25
Figure 7: Replacing O-rings ..................................................................................................25
Figure 8: Purge Block In Scanner .........................................................................................26

KMPS-1-64 Manual
12/18 KM 8000 Rev. A Page 4 of 40
Copyright © 2018 Kulite Semiconductor Products, Inc.
All Rights Reserved.
1 Specifications
SPECIFICATIONS
Available Channels
64
Pressure range
1 –100 PSID 15 –500 PSIA
Operating
Temperature Range
-65°F to 255°F (-55°C to 120°C)
Compensated
Temperature Range
-65°F to 255°F (-55°C to 120°C)
TEB over 12 months
< +/- 5 PSI TEB :± 0.20% FS. TYP
> +/- 5 PSI TEB :± 0.10% FS. TYP
Dimensions
Width: 1.5”
Length: 3.25”
Height: 2.0”
Weight
1.1 kg
Ambient pressure
30 PSIA
Sample Rate
275 samples/channel/sec
Connections
Electrical connector :
15 Pin subminiature D-shell
Pneumatic connector:
64 .040” Bulged tubulations
Excitation
8 - 32 VDC
Max Current
0.25 A
Resolution
24 Bit
Over Pressure
2X Rated Pressure
Burst Pressure
3X Rated Pressure
Analog Output
0.5 –4.5 Volts
Multiplexer Inputs
3.3 Volt Inputs with 10 kOhm Pull-Up resistor
To select pin pull to ground to unselect leave floating
Table 1: General Specification

KMPS-1-64 Manual
12/18 KM 8000 Rev. A Page 5 of 40
Copyright © 2018 Kulite Semiconductor Products, Inc.
All Rights Reserved.
1.1 Electrical Connector
Table 2 : Electrical Connector for RS485 KMPS-1-64-XX-R
Table 3 : Connections for Ethernet KMPS-1-64-XX-E
Pin
Function
1
+28V
2
Ground
3
RS-485A
4
RS-485B
5
X
6
X
7
Vout
8
MUX1
9
MUX2
10
MUX3
11
MUX4
12
MUX5
13
MUX6
14
Trigger
15
Factory Use
Pin
Function
1
+28V
2
Ground
3
RX+
4
RX-
5
Tx+
6
Tx-
7
Vout
8
MUX1
9
MUX2
10
MUX3
11
MUX4
12
MUX5
13
MUX6
14
Trigger
15
Factory Use

KMPS-1-64 Manual
12/18 KM 8000 Rev. A Page 6 of 40
Copyright © 2018 Kulite Semiconductor Products, Inc.
All Rights Reserved.
1.2 Part Numbers
The KMPS-1 part number is of the form:
KMPS-1-64-XX-Y-AA/BB/CC/DD
Where:
XX –Purge Option
AP –Air Purge Pneumatically activated purge block installed
NP –No Purge
Y –Communication Option
E –Ethernet
R –RS-485
AA –Pressure range of first module (channels 0 - 15)
BB –Pressure range of second module (channels 16 - 31)
CC –Pressure range of third module (channels 32 - 47)
DD –Pressure range of fourth module (channels 48 - 63)
If all ranges are the same then you can have just one pressure range indicated. If first two
modules are one pressure and second two are another than you can have just two pressure
ranges indicated. For all other orders all ranges must be specified. If all modules are
absolute or all are differential then it can be specified at then end but if they are different
then it must be specified for each module
Examples:
KMPS-1-64-AP-E-7BARD - 64 channels of 7 Bar differential with a purge and Ethernet
output
KMPS-1-64-AP-E-25D/50APSI - 32 channels of 25 PSI differential and 32 channels of 50
PSI absolute with a purge and Ethernet output
KMPS-1-64-NP-R-25/50/75/100PSIA -16 channels each of 25,50,75, and 100 PSIA with no
purge and RS-485 output.
KMPS-1-64-NP-R-100/50/XX/XXPSIA - 16 channels of 100 PSIA and 16 channels of 50
PSIA no modules in the last two positions. Please note that it is still a KMPS-1-64 not a
KMPS-1-32.

KMPS-1-64 Manual
12/18 KM 8000 Rev. A Page 7 of 40
Copyright © 2018 Kulite Semiconductor Products, Inc.
All Rights Reserved.
2 Theory of Operation
The KMPS-1-64 consists of 64 Silicon on Insulator(SOI) piezoresistive pressure sensors
mounted onto plates of 16 sensors each. These sensors are then connected to individual
pressure inputs via a manifold. The pressure sensors are grouped together in two groups of
eight per module for a total of eight groups of eight. Each group is connected to a multiplexer.
The output of the multiplexer is then routed through an analog amplifier which is then sent to
the inputs of a 24 bit delta/sigma analog to digital converter (A/D).
Each of these eight A/Ds then sends the digital information to a single microprocessor (P).
By switching the inputs of the multiplexer it is possible for the A/Ds to measure both the
pressure output of the transducer as well as the temperature of the transducer. In this way
the P can correct the pressure data for errors over both temperature and pressure.
Figure 1: Figure 1: Block Diagram of Scanner Electronics
When all sixty-four sensors are being polled the maximum data rate is 275
samples/channel/sec. However because the sensors are arranged in groups of eight it is
possible to increase the sampling rate by limiting the sensors that are scanned. For instance
if only sensor 1, 9, 17, 25, 33, 41, 49, and 56 (one per A/D) are scanned the data rate would
be 2000 samples/channel/sec. By selecting sensors from each of the eight different banks it
is possible to customize the data rate and number of channels available.
The sensors are numbered starting at 0 and going up to 63.
Pressure Sens
Pressure Sens
Pressure Sens
Pressure Sens
Pressure Sens
Pressure Sens
Pressure Sens
Pressure Sens
M
U
L
T
I
P
L
E
X
E
R
24 Bit
Delta
Sigma
A/D
Pressure and
Temperature
Data
Analog Out
Digital Out
Pressure Sens
Pressure Sens
Pressure Sens
Pressure Sens
Pressure Sens
Pressure Sens
Pressure Sens
Pressure Sens
M
U
L
T
I
P
L
E
X
E
R
24 Bit
Delta
Sigma
A/D
Pressure and
Temperature
Data
Sensor
Plate
Central
Electronics
Board
Micro
Controller

KMPS-1-64 Manual
12/18 KM 8000 Rev. A Page 8 of 40
Copyright © 2018 Kulite Semiconductor Products, Inc.
All Rights Reserved.
2.1 Internal Connections
The KMPS-1-64 has an internal purge manifold which allows for the KMPS-1 to be placed
either in measure mode or purge/calibration mode by supplying pressure either to the MSR
input or PRG input on the two ends of the KMPS (see figure 2). Under normal conditions 100
PSI is required to move the manifold but at temperatures below -40°F pressures as high as
200 PSI may be required.
In measure mode the front of each of the 64 sensors is connected directly to one of the bulged
tubulations on the top of the KMPS. If the sensor is differential the back is connected to a
reference manifold which is connected to one of the two reference tubes (REFA or REFB)
depending on which side of the scanner the sensor is on.
When the manifold moves into purge/calibration mode the sensors become disconnected from
the top tubulations. Instead all of the tubulations are connected to the purge input allowing
for high pressure air to be blown out of the tubes clearing away moisture or obstructions. At
the same time the front of all of the sensors are connected together and connected to one of
the calibration tubes (CALA or CALB) allowing for an in place calibration of the scanner.
WHEN IN CAL MODE IT IS IMPORTANT NOT TO APPLY HIGHER PRESSURE THAN THE
LOWEST RANGE SENSOR CAN HANDLE.
The backs of the sensors remain connected to the reference manifold which is still connected
to the reference input. In this way it is possible to calibrate higher pressure absolute sensors
by raising the pressure of both the CAL and REF1 inputs simultaneously so that no differential
pressure is applied to low pressure differential sensors.
Figure 2: Drawing of top of KMPS-1

KMPS-1-64 Manual
12/18 KM 8000 Rev. A Page 9 of 40
Copyright © 2018 Kulite Semiconductor Products, Inc.
All Rights Reserved.
Figure 3: Schematic Diagram of internal Piping of KMPS-1
2.2 Temperature Compensation
Both the pressure and temperature output is compensated inside the microprocessor using
coefficients programmed at the factory. All coefficients for these calculations are stored on
an EEPROM in each of the four modules. In this way a module can be replaced without any
programming. The user has access to the user gain (Gu) and offset (Ou) for each unit to allow
for adjustment but does not have access to temperature correction coefficients which are
programmed at the factory. The offset and gain can be changed using the SLope and OFfset
command. The UNits command automatically adjusts the full scale value to reflect the
difference between PSI and Bar.
2.3 Pressure Output
The pressure sensors are compensated using a fourth order compensation in temperature
and a third order compensation in pressure according to the formulae:
Offset = O = O0*T4 + O1*T3 + O2*T2+ O3*T+ O4
Gain = G = G0*T4 + G1*T3 + G2*T2+ G3*T+ G4
Linearity = L = L0*T4 + L1*T3 + L2*T2+ L3*T+ L4
Third Order = C = C0*T4 + C1*T3 + C2*T2+ C3*T+ C4
Pressure Out(% of Range) = Gu* (C*P3+ L*P2+ G*P) + O + Ou
Pressure Out (Engineering Units) = Pressure Out * Full Scale Reading
Pressure Inputs
Reference Manifold
Pressure
Sensors
Purge Input
(PURGE)
Cal Input
(CALA & B)
Reference
Input (REFA & B)
Ref
Input (REFA
& B)

KMPS-1-64 Manual
12/18 KM 8000 Rev. A Page 10 of 40
Copyright © 2018 Kulite Semiconductor Products, Inc.
All Rights Reserved.
2.4 Temperature Output
The temperature is read off of each sensor and then the raw output is converted to
temperature using a second order conversion
Tout= A2*T2+ A1*T + A0
This data is available for each sensor using the TEmperature command. The UNits command
automatically switches the temperature between Fahrenheit and centigrade.
UNit PRessure
arg
Sets or returns the pressure units. Valid values for arg are PSi or BAr. All
pressure readings will be expressed in this unit.
UNit
TEmperature arg
Sets or returns the temperature units. Valid values for arg are C or F. All
temperature readings will be expressed in this unit.
Table 4 : Units Commands
2.5 Analog Output
The analog output is available in Analog Mode. The channel number to output is selected via
the multiplexer pins. These pins are 3.3 volt tolerant and have a weak pull-up to 3.3 volts. A
pin is selected by pulling down to ground. For instance to select channel 3 pins 1 and 2 would
be pulled to ground and 3, 4, 5, and 6 left to float.
The analog output is from 0.5 to 4.5 volts for any channel. For absolute channels 0.5 volts
represents 0 PSIA and 4.5 volts represents the full scale of the channel. For differential
channels 0.5 represents the negative full scale pressure and 4.5 volts represents positive full
scale pressure.
2.6 Trigger
Triggered acquisition allows the user to simultaneously sample data from many scanners at
the same time. The trigger can be activated by bringing the trigger pin low or by sending a
trigger command. In standard trigger mode the data for all 64 channels is immediately output
after acquisition. In the polled trigger mode the data is taken and stored until polled by the
user. This can be useful to avoid data collision on an RS-485 network.
3 Communication
The KMPS digital output can either be RS-485 or Ethernet output. The advantages of RS-
485 are a simpler wiring scheme (2 vs 4 wires) and the ability to connect multiple units together
along a single bus (daisy chaining). Ethernet output has the advantage of being more easily
connected to existing networks.
Most commands are available in RS-485, TCP, and UDP communication. Those that are only
used in one type are listed separately under that protocol.
For RS485 commands are in the form of $AA X where AA is the address of the scanner and
X is the command. Commands can either be sent as the full word or only the first two
characters. There must be at least one space between the address and the command.
Another space is used between the command and each option.