G-Tek LM Pro 63 Series User manual

CONTENTS
Contents................................................................................................................................ 0
List of Tables................................................................................................................... 2
List of Figures ................................................................................................................. 3
Safety and the environment............................................................................................ 4
3.1 Use .....................................................................................................................................4
3.2 Ensure Safety ......................................................................................................................4
3.3 Protecting the environment.................................................................................................4
Specifications ................................................................................................................. 5
4.1 Use .....................................................................................................................................5
4.2 Features..............................................................................................................................5
4.3 Technical Data.....................................................................................................................6
Unpacking and inspection of data logger ........................................................................ 8
5.1 Overall mechanical dimensions for Round plate data logger.................................................9
5.2 Overall mechanical dimensions for Square plate data logger ..............................................10
Electrical installation .................................................................................................... 11
6.1 Wiring diagram for Data logger..........................................................................................11
6.2 RS485 connection Diagram................................................................................................12
Operation..................................................................................................................... 13
7.1 Front panel of Data logger.................................................................................................13
7.2Zero offset ........................................................................................................................14
7.3 Status of LED Indication.....................................................................................................15
7.4 Seven segment LED display................................................................................................16
Configuration ............................................................................................................... 17
6.1 Configurable item..............................................................................................................17
6.2 Main menu sequence ........................................................................................................18
6.3 CPAR (Configurable Parameters)........................................................................................19
6.3.1 AOND (Alarm on delay)..........................................................................................................................20
6.3.2 AOFT (Alarm off delay)...........................................................................................................................20
6.3.3 ALSH (Alarm set point high)...................................................................................................................21
6.3.4 ALSL (Alarm set point low).....................................................................................................................21

Page. 1 LM P RS485 Data Logger
6.3.5 UNIT .......................................................................................................................................................22
6.3.6 OFST (offset) ..........................................................................................................................................23
6.3.7 MUL (Multiplier) ....................................................................................................................................23
6.4 RTC (Real time clock).........................................................................................................24
6.5 UPDR (Update Display Refresh Rate)..................................................................................25
6.6 PSEN (Password Enable) ....................................................................................................25
6.7 CHPS (Change Password)...................................................................................................26
6.8 **BSTS (Batch start/stop)..................................................................................................26
6.9 **SINT (Store interval) ......................................................................................................27
Communication ............................................................................................................ 28
7.1 COMM (Communication Type)...........................................................................................29
7.2 BAUD (Baud rate)..............................................................................................................29
7.3 DADR (Device address)......................................................................................................30
7.4 PRTY (Parity).....................................................................................................................30
7.5 AVGE (Average Enable)......................................................................................................31
Modbus RTU Communication........................................................................................ 32
8.1 Modbus RTU Protocol .......................................................................................................32
8.2 Modbus RTU Message Framing..........................................................................................32
8.3 Modbus ASCII Message Framing ........................................................................................33
8.4 Modbus function codes .....................................................................................................33
8.5 Read Current Pressure Data in RTU mode ..........................................................................34
8.6 Read Device Information in RTU mode...............................................................................35
Troubleshooting guide .................................................................................................. 37
Order code ................................................................................................................ 38

Page. 2 LM P RS485 Data Logger
LIST OF TABLES
Table 1 Specifications....................................................................................................................................6
Table 2 Pressure Units with their range........................................................................................................7
Table 3 Connection notations.....................................................................................................................11
Table 4 RS485 Connection notations..........................................................................................................11
Table 5 Status of LED's................................................................................................................................15
Table 6 Configurable item...........................................................................................................................17
Table 7 MEI Current pressure data query...................................................................................................34
Table 8 MEI Query response.......................................................................................................................36
Table 9 Troubleshooting guide ...................................................................................................................37
Table 10 Order code ...................................................................................................................................38

Page. 3 LM P RS485 Data Logger
LIST OF FIGURES
Figure 1 Front and back view of Round plate LM P RS485 data logger (Model No:63xx)............................8
Figure 2 Front and back view of Square plate LM P RS485 data logger ((Model No:64xx) ..........................9
Figure 3 Overall mechanical dimensions for Round plate data logger (Model No:63xx).............................9
Figure 4 Overall mechanical dimensions for Square plate data logger (Model No:64xx) ..........................10
Figure 5 Wiring Diagram of Data logger .....................................................................................................11
Figure 6 4-Wire RS485 Wiring diagram......................................................................................................12
Figure 7 2-Wire RS485 wiring diagram ......................................................................................................12
Figure 8 Front panel of data logger ............................................................................................................13
Figure 9 Seven segment LED display...........................................................................................................16
Figure 10 Main menu sequence..................................................................................................................18
Figure 11 Configurable parameters ............................................................................................................19
Figure 12 AOND (Alarm on delay)...............................................................................................................20
Figure 13 AOFT (Alarm off delay)................................................................................................................20
Figure 14 ALSH (Alarm set point high)........................................................................................................21
Figure 15 ALSL (Alarm set point low)..........................................................................................................21
Figure 16 Unit Sequence.............................................................................................................................22
Figure 17 OFST (Offset)...............................................................................................................................23
Figure 18 MUL (Multiplier)..........................................................................................................................23
Figure 19 RTC (Real time clock)...................................................................................................................24
Figure 20 UPDR (Update Display Refresh Rate)..........................................................................................25
Figure 21 PSEN (Password Enable) .............................................................................................................25
Figure 22 CHPS (Change Password)............................................................................................................26
Figure 23 BSTS (Batch start)........................................................................................................................26
Figure 24 BSTS (Batch stop) ........................................................................................................................27
Figure 25 SINT (Store interval)....................................................................................................................27
Figure 26 Communication (Password authentication) ...............................................................................28
Figure 27 COMM (Communication Type) ...................................................................................................29
Figure 28 BAUD (Baud rate)........................................................................................................................29
Figure 29 DADR (Device address)................................................................................................................30
Figure 30 PRTY (Parity)................................................................................................................................30
Figure 31 AVGE (Average Enable) ...............................................................................................................31

Page. 4 LM P RS485 Data Logger
SAFETY AND THE ENVIRONMENT
3.1 USE
➢This instruction manual is an essential component of the product.
➢Please read this documentation carefully and pay attention to the safety
instructions and warning notices to prevent injuries and damage to the product.
➢Keep this document handy so that you can refer to it when necessary.
3.2 ENSURE SAFETY
➢Operate the product properly, for its intended purpose and within the parameter
specified in the technical data. Using it beyond the specified limit can cause the
damage to the product and personnel also.
➢Do not use the product if there are signs of damage to the housing.
➢Carry out only the maintenance and repair work on this instrument that is
described in the documentation. Follow the prescribed steps exactly. Use only
original spare parts from G-Tek.
3.3 PROTECTING THE ENVIRONMENT
➢Dispose of faulty rechargeable batteries/spent batteries in accordance to the local
regulations or valid legal specifications.
➢At the end of its useful life, send the product to the separate collection for electric
and electronics devices (observe local regulations) or return the product to G-Tek
for disposal.

Page. 5 LM P RS485 Data Logger
SPECIFICATIONS
4.1 USE
➢The LM-P-PRO series of differential pressure data logger / indicator is very helpful
in monitoring differential pressure especially for clean rooms. Large 0.56” LED
digital display eliminates the human error in reading the data. The device is field
programmable for most common of the eight measuring units. The decimal point
gets selected automatically for displaying with best resolution.
➢It also has a feature to set the high and low alarm limit. Whenever the limit is
crossed, appropriate LED indicates the alarm condition. Display also starts
blinking, for better attention.
➢Programming of various parameters like, unit, alarm limits, calibration parameters
(zero and span), communication parameters etc. are all settable through 4 keys.
Data is scanned every second. It has RS485 2/4 wire communication port to
connect to any SCADA using MODBUS RTU/ASCII protocol. User can get the
current data and device identification information over protocol.
➢Device also has an optional memory to store the data. It is possible to store the
data at an interval between 1 second to 18 hours interval. The stored data can only
be retrieved through our web- based data acquisition software gtekNetTM. It is
also possible to configure the entire device from this software. gtekNetTM enables
the user to see, modify, generate report with 21CFRPart 11 compliance using any
standard browser from anywhere over network connected device.
4.2 FEATURES
➢Differential Pressure
➢8 engineering units of measure →Pascal, KPA, mBar, PSI, mmWC, inWC,
mmHg, InHg
➢Digital Display
➢Alarm set point high / low
➢Alarm Indicator
➢Wide power supply 5-30V DC
➢RS 485 MODBUS compatible
➢SS 314 Front facia

Page. 6 LM P RS485 Data Logger
4.3 TECHNICAL DATA
Table 1 Specifications
Specifications For LM-P RS485 data logger
Model No
LM-P RS485 data logger
Display Details
Display
Digital, 4 digits ultra-bright LED Numeric/semi
alphabetic display
Status Indicator
Unit Indication, High and Low Alarm Indication, and
storage on Indication
Display Refresh rate*
1 reading / second
Analog Input Details
Input Media
Air and non-combustible and non-corrosive gases.
For Wetted Materials, consult factory.
Pressure Sensor
MEMS sensor either Differential or Absolute pressure
Measurement parameters
[ 8 units]
Pascal (PA), Kilo pascal (KPA), milli bar (mbar), psi
(PSI), mm of Water Column (mmWC), inch of Water
Column (INWC), mm of Hg (mmHG), inch of Hg (INHG)
Measuring range Pressure
-500 to +500 pascal(refer Table2 for other units’ range)
Pressure Accuracy
± 1.5 %FSD
Pressure Input port
Quick Connect/Disconnect port 3 mm tube ID
Environmental conditions
Temperature
(Operating) -5 to +65 oC
(Storage) -40 to +125 oC
Relative Humidity
(Operating) 10 to 80 % RH Noncondensing
(Storage) 5 to 90 % RH Noncondensing
Altitude
<2000 meter
**Batch Storage Data/Memory Details
Start / Stop Batch
Remote Start –Stop through gtekNetTM
Store Interval
0 To 240 min in Step of 1 Sec
Memory Size
4000 records totals; Rollover
Power Requirements
Supply Voltage
5 –30 V DC,1 A
Communication Details
Communication
EIA 4 wire RS 485
Protocol
Modbus RTU/ASCII Protocol
Baud rate
User settable –4.8k, 9.6k, 19.2k & 38.4k bps
Parity
User settable –None, Even & Odd
Device Address
1 to 247 –User settable
Alarm Details
Alarm Set-point
High/Low individually settable for channel
Buzzer
Audible alarm on high/low condition
Alarm high/low status
Alarm High/low individual status LEDs

Page. 7 LM P RS485 Data Logger
Table 2 Pressure Units with their range
NOTE: Please refer the order code for detailed features.
# Pressure range will be as per the selected order code. Table 2 show the pressure range for ± 5
mbar sensor.
* Display refresh rate is settable by user from menu.
The starred (**) parameter varies with order code selection. As per selection, if the device is with
no memory, then some features like batch operation and store interval are not provided.
Mechanical Dimensions and Mounting
Housing Material
ABS Plastic
Mounting Orientation
Mounting unit in vertical plane
Size (L x W x D) mm
190 x 190 x 40
Panel Cutout (Diameter) mm
115
Housing (Diameter) mm
112
Weight
500 gms Approx.
Unit
No.
Pressure Unit
Unit list on Display
Pressure Range#
1
Pascal
PA
-500 to +500
2
Kilo Pascal
KPA
-0.500 to +0.500
3
Milli Bar
mbar
-5.00 to +5.00
4
Pound Square per inch
PSI
-0.072 to +0.072
5
mm of Water Column
Mh2o
-50.9 to +50.9
6
Inch of Water Column
Ih2o
-2.01 to +2.01
7
mm of mercury
mmhg
-3.75 to +3.75
8
Inch of mercury
Inhg
-0.147 to +0.147

Page. 8 LM P RS485 Data Logger
UNPACKING AND INSPECTION OF DATA LOGGER
➢6X Pressure data logger is dispatched in a recyclable, environment friendly
package specially designed to give adequate protection during transit.
➢If the outer box shows sign of damage, it should be opened immediately, and the
device be examined.
➢If there is evidence of damage, the device should not be operated, and the local
representative contacted for instructions. Ensure that all accessories and
documentation is removed from the box.
➢There are two variants of LM P RS 485 data logger(refer order code) –Square and
Round plate as shown in figure 1 and figure 2.
➢If the 6X Pressure data logger is for immediate use, you can start installing it as
per Installation instructions.
➢Please preserve the original packing along with all internal packing for future
transport requirements.
Figure 1 Front and back view of Round plate LM P RS485 data logger (Model No:63xx)

Page. 9 LM P RS485 Data Logger
5.1 OVERALL MECHANICAL DIMENSIONS FOR ROUND PLATE DATA LOGGER
Figure 3 Overall mechanical dimensions for Round plate data logger (Model No:63xx)
Figure 2 Front and back view of Square plate LM P RS485 data logger ((Model No:64xx)

Page. 10 LM P RS485 Data Logger
5.2 OVERALL MECHANICAL DIMENSIONS FOR SQUARE PLATE DATA LOGGER
Figure 4 Overall mechanical dimensions for Square plate data logger (Model No:64xx)
Overall Dimensions (approx.)
Round plate(63xx)
Square plate(64xx)
Dimensions (L x W x D) (mm)
40(D)
190 x 190 x 40
Panel Cutout (Diameter) mm
115
115
Housing (Diameter) mm
112
112
Diameter(mm)
125
-

Page. 11 LM P RS485 Data Logger
ELECTRICAL INSTALLATION
6.1 WIRING DIAGRAM FOR DATA LOGGER
Table 3 Connection notations
Table 4 RS485 Connection notations
Code
Connector Name
Pin Number of connectors
1
2
3
4
5
Communication
RS485
RX (+)
RX (-)
TX (-)
TX (+)
GND
*Note: All wiring diagram connection are same for both models.
Code
Connector Name
Pin Number of connectors
1
2
Sensor
input
Pressure sensor
(+)
(-)
DC supply
5 - 24 V DC supply adapter
(+)
(-)
Sensor
Input
DC
Supply
Communication
Figure 5 Wiring Diagram of Data logger

Page. 12 LM P RS485 Data Logger
6.2 RS485 CONNECTION DIAGRAM
Figure 6 4-Wire RS485 Wiring diagram
➢Multiple LM P RS485 devices can be connected with 4-wire RS485 is shown in
figure 6.
➢User can refer figure 7, if 4- wire to 2-wire RS485 conversion is required.
Figure 7 2-Wire RS485 wiring diagram

Page. 13 LM P RS485 Data Logger
OPERATION
7.1 FRONT PANEL OF DATA LOGGER
After the proper wiring is done, Power ON the device. The heartbeat LED is blinking at
every one second, The Display will show “gtec”message for few seconds and then
reading of pressure input. The default pressure is in pascal, which is indicated by PA LED
(unit1). User can reconfigure the configuration parameters by entering programming
menu (Refer Configuration section).
FUNCTION
KEY
UP
KEY
DOWN
KEY
ENTER
KEY
Figure 8 Front panel of data logger

Page. 14 LM P RS485 Data Logger
KEYS:
➢There are four multifunction keys available on the front panel of the Device to
configure the different parameters. The functions of these keys are described as
below:
This key is used to enter the main menu sequence as well as come out from the
main menu.
This key is used to increment the digits or go to the next parameter.
This key is used to decrement the digits or go back to the previous parameter
This key is used to save the parameter values, to enter a menu/submenu
7.2 ZERO OFFSET
➢User can do the zero offset for pressure reading by press and hold FUNCTION,
DOWN and ENTER key for at the same time. Afterpressing these keys, zero offset
will be applied, and display parameter will show ‘0’ on display.
NOTE: After applying zero offset, for calibration process, the user should set offset
and multiplier as 0 and 1, respectively.

Page. 15 LM P RS485 Data Logger
7.3 STATUS OF LED INDICATION
➢Table 5 provides brief description of LED status, which will be explained in detail
in their individual section.
Table 5 Status of LED's
Status LED’S
Description
Heartbeat
(HB_LED)
This LED shows Device Status. It will blink every 1 sec.
**Storage
(SL_LED)
This LED shows Batch start indication, which means the
device has started collecting data. It will blink every 1
sec if the batch is started
ALL (Alarm Low)
ALL LED display and unit LED will blink, if the pressure
reading goes below alarm set point low value. In normal
condition, Pressure value above alarm set point low,
ALL LED will remain in OFF state.
ALH (Alarm High)
ALH LED, display and unit LED will blink, if the pressure
reading goes above alarm set point high value. In
normal condition, Pressure value below alarm set point
low, ALH LED will remain in OFF state.
Unit LEDs(8 LEDs)
This LEDs shows unit status. You can identify the
selected unit by this indication LED.
E.g.: The default unit is pascal, when you power the
device, pa LED is ON, it will change according the
selection of unit.

Page. 16 LM P RS485 Data Logger
7.4 SEVEN SEGMENT LED DISPLAY
Figure 9 Seven segment LED display
➢The seven segment LED display has 4 digits displaying capability which is shown
in figure 9.
➢It can display the integer values in the range of -1999 to 9999.
➢The LED display has the precision of 3 digits after decimal point.
➢Note that, the display range of pressure value are set by menu using proper
pressure unit
➢For example, if the selected pressure unit is pascal then the display range will be
-500 to 500. If pressure value goes out of this pressure range in positive side,
then display will show OVER Range (over).
➢If pressure value goes out of this pressure range in negative side, then display will
show UNDER Range (undr).

Page. 17 LM P RS485 Data Logger
CONFIGURATION
Usage of Keys:
To enter in the function menu for modification or to come out from the function
menu/submenu.
Up Key is used to increment the parameter value. It is also used to go to the next
parameter/sub-menu.
Down Key is used to decrement the parameter value. It is also used to go back to
the last parameter/sub-menu.
To store the parameter value and use to enter in the function for modification.
6.1 CONFIGURABLE ITEM
Table 6 Configurable item
Channel Configuration Parameter
Alarm on
delay
Delay time, after which the buzzer will be activated
Alarm off
delay
Delay time, after which the buzzer will be activated
Set point
High
The upper limit of value, after which buzzer and ALH LED will be
blink.
Set point
Low
The lower limit of value, after which buzzer and ALL LED will be
blink.
Unit
There are 8 pressure units available in this device.
Offset
A small correction may be required when actual sensor is
connected to the Pressure device. This is a mathematical value
which is directly added to the reading.
Multiplier
A value to remove any scale error. This is a mathematical value
which is directly multiplied to the reading.
Displayed reading = (reading x multiplier) + offset

Page. 18 LM P RS485 Data Logger
6.2 MAIN MENU SEQUENCE
➢Device can be Configured using front panel Keyboard, by entering the function
key. User can enter the configuration as per their requirement. Figure 10 shows
the main menu sequence.
Pressure at room temp,
open condition (display
parameter)
Figure 10 Main menu sequence
updr
cpar
rtc
0
psen
chps
bsts
Sint