MicroStep-MIS MSB780 User manual

MSB780, MSB780X,
MSB780X transfer standard
Digital Barometers
Version 1.25
User’s Guide
October 17, 2017

MSB780(X) - User’s Guide
c
Copyright 2013-2017, by MicroStep-MIS .
All rights reserved. No part of this publication may be reproduced, stored in retrieval system,
or transmitted by any means, electronic, mechanical, photocopying, recording, or otherwise
without the prior written permission of MicroStep-MIS .
Trademarks
All trademarks or registered trademarks mentioned belong to their respective owners.
Authors
Editorial team: Adam Krovina, Ján Mikulka, Ján Hudec
Firmware version
This version of user guide describes functionality of firmware version 097.
Hardware version
This version of user guide describes functionality of hardware MSB780 V2 and MSB780X V2.0.
Address
MicroStep-MIS Monitoring and Information Systems,
ˇ
Cavojského 1,
841 04 Bratislava 4, Slovakia
Tel.: [phone], Fax: [phone],
e-mail: inf[email protected]
MicroStep-MIS develops, manufactures and markets monitoring and information systems. The
key fields of our activities are meteorology, aviation, environmental sciences, seismology, power
engineering, civil defense and tourism.
MicroStep-MIS operates worldwide. Our core customer groups are airports, meteorological
and seismological institutes, environmental authorities, industry, power stations and electricity
distribution companies.
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MSB780(X) - User’s Guide
Typographical conventions
Throughout this guide, several typographical conventions are used to help reader to follow in-
structions and identify the important information.
The special notes:
Note: Air must be used as a pressure medium during calibration.
The text input or command:
cnf?<cr>
The text output:
Sleep.
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MSB780(X) - User’s Guide
Contents
1 Introduction 11
2 Hardware 12
2.1 Principleofoperation.................................. 12
2.2 Terminals ........................................ 12
2.3 Powersupply ...................................... 12
2.4 Power consumption - model with touchscreen display . . . . . . . . . . . . . . . 12
2.5 Powersavingmode .................................. 14
2.6 Serialinterface(RS-232) ............................... 14
2.7 Connecting MSB780 or MSB780X to PC . . . . . . . . . . . . . . . . . . . . . . . 15
2.8 SDI-12interfacewiring................................. 15
2.9 Serviceconnector ................................... 15
3 MSB780X transfer standard version 16
3.1 Connecting the external probe to the transfer standard . . . . . . . . . . . . . . . 18
3.2 Turning the transfer standard on/off . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.3 Recharging the transfer standard battery . . . . . . . . . . . . . . . . . . . . . . . 19
3.4 Using the transfer standard with AA batteries . . . . . . . . . . . . . . . . . . . . 20
3.5 Connecting the transfer standard to a computer . . . . . . . . . . . . . . . . . . . 20
3.6 Transfer standard connectors description . . . . . . . . . . . . . . . . . . . . . . 21
3.7 Adjustment of the transfer standard . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.8 Terminals of the transfer standard . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.9 Memorycard ...................................... 23
4 Maintenance 24
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MSB780(X) - User’s Guide
4.1 Cleaning......................................... 24
4.2 ErrorStates....................................... 24
4.3 Recommended recalibration interval . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.4 Compensation sensor exchange procedure . . . . . . . . . . . . . . . . . . . . . 25
4.4.1 Compensation sensor - maintenance . . . . . . . . . . . . . . . . . . . . 25
4.4.2 Compensation sensor FAQ . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5 Calibration and Adjustment 27
5.1 How to read the current correction values . . . . . . . . . . . . . . . . . . . . . . 27
5.2 Disablingthecorrection ................................ 27
5.3 Adjusting MSB780X with more than one transducer . . . . . . . . . . . . . . . . 28
5.4 One pressure point adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.5 Two pressure points adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.6 More than 2 pressure points adjustment . . . . . . . . . . . . . . . . . . . . . . . 29
5.7 “caset” Adjust the analog output . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6 RS-232 and RS-485 commands 31
6.1 Serial interface command set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.2 Basiccommands.................................... 33
6.3 “p” Poll measurement command . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.4 “d” Poll extended measurement command . . . . . . . . . . . . . . . . . . . . . . 33
6.5 “cnf?”Printconfiguration................................ 34
6.6 “errors” Print error message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.7 “sdi12a” SDI-12 address change . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.8 “help”Displayhelp ................................... 38
6.9 “boot”Restartdevice.................................. 38
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MSB780(X) - User’s Guide
6.10 “seri” Set communication settings for user RS-232 . . . . . . . . . . . . . . . . . 38
6.11“echo1”Enableecho.................................. 38
6.12“echo0”Disableecho ................................. 39
6.13 "form" Change output message format . . . . . . . . . . . . . . . . . . . . . . . . 39
6.14 "form?" Get actual output message format . . . . . . . . . . . . . . . . . . . . . . 41
6.15 “smode” Change the user port start-up operating mode . . . . . . . . . . . . . . 41
6.16 "smode?" Get actual user port start-up operating mode . . . . . . . . . . . . . . 42
6.17 “intv” Change the outputting interval for RUN mode . . . . . . . . . . . . . . . . . 42
6.18 "intv?" Get actual the outputting interval for RUN mode . . . . . . . . . . . . . . . 43
6.19"avrg"Averagingtime ................................. 43
6.20 "avrg?" Get averaging time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
6.21 “addr” Change the address in POLL mode . . . . . . . . . . . . . . . . . . . . . . 44
6.22 “addr?” Get actual address in POLL mode . . . . . . . . . . . . . . . . . . . . . . 44
6.23 “open” Access to command mode in POLL mode . . . . . . . . . . . . . . . . . . 44
6.24 “close” Close command mode in POLL mode . . . . . . . . . . . . . . . . . . . . 44
6.25 “send” Read the output message in POLL mode . . . . . . . . . . . . . . . . . . 45
6.26 “unit” Change the measurement unit . . . . . . . . . . . . . . . . . . . . . . . . . 45
6.27 “unit?” Get actual measurement unit . . . . . . . . . . . . . . . . . . . . . . . . . 46
6.28 “cnfdef” Set default configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
6.29 “terminal rs232” Temporarily redirect the service port to RS232 . . . . . . . . . . 46
6.30 “terminal rs485” Temporarily redirect the service port to RS-485 . . . . . . . . . . 47
6.31 “terminal probe” Temporarily redirect the service port to external probe . . . . . . 47
6.32"dire:"Printlistoffiles................................. 47
6.33 "type <filename>" print file . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6.34 xmodemr - downloading files using XMODEM . . . . . . . . . . . . . . . . . . . . 48
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MSB780(X) - User’s Guide
6.35Adjustmentcommands................................. 49
6.36 “cset” Set adjust coefficients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.37 “cnf?” Get actual adjust coefficients . . . . . . . . . . . . . . . . . . . . . . . . . . 50
6.38 “dpmax” Set the maximum permissible pressure difference . . . . . . . . . . . . 50
6.39 “dpmax?” Get the maximum permissible pressure difference . . . . . . . . . . . . 50
6.40 “adjdef” Set default adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.41 Corrected pressure commands - QFE, QNH, HCP . . . . . . . . . . . . . . . . . 51
6.42 “icaomode” Set mode for calculation of corrected pressures . . . . . . . . . . . . 51
6.43 “icaodigits” Set number of decimal praces of corrected pressures . . . . . . . . . 51
6.44 “hqfe” Set altitude for QFE corrected pressure . . . . . . . . . . . . . . . . . . . . 52
6.45 “hqnh” Set altitude for QNH corrected pressure . . . . . . . . . . . . . . . . . . . 53
6.46 “tqfe” Set temperature for QFE corrected pressure . . . . . . . . . . . . . . . . . 55
6.47 “tqfea” Set actual temperature for QFE corrected pressure . . . . . . . . . . . . . 55
6.48 “hhcp” Set height difference for HCP level . . . . . . . . . . . . . . . . . . . . . . 55
6.49 “hqfe?” Get altitude for QFE corrected pressure . . . . . . . . . . . . . . . . . . . 56
6.50 “hqnh?” Get altitude for QNH corrected pressure . . . . . . . . . . . . . . . . . . 56
6.51 “tqfe?” Get default temperature for QFE corrected pressure . . . . . . . . . . . . 56
6.52 “tqfea?” Get actual temperature for QFE corrected pressure . . . . . . . . . . . . 56
6.53 “hhcp?” Get height difference for HCP level . . . . . . . . . . . . . . . . . . . . . 56
6.54"dt"Getdateandtime ................................. 57
6.55"setdt"Setdateandtime ............................... 57
6.56"setpin"SetnewPINcode............................... 57
7 Display access 58
7.1 Basicscreens...................................... 58
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MSB780(X) - User’s Guide
7.2 Graphscreen...................................... 60
7.3 Mainmenu ....................................... 60
7.4 Menustructure ..................................... 60
7.5 Recording menu (logging data to SD card, view in graph) . . . . . . . . . . . . . 61
7.6 Measuring menu (measurement settings) . . . . . . . . . . . . . . . . . . . . . . 64
7.7 Interfaces menu (settings of interfaces) . . . . . . . . . . . . . . . . . . . . . . . 67
7.8 System menu (Date/Time, diagnostics, serial/version numbers) . . . . . . . . . . 69
7.9 Display menu (shown quantities, graph time-scale, backlight settings) . . . . . . 70
7.10Alarm .......................................... 71
8 SDI-12 reference 72
8.1 IntroductiontoSDI-12 ................................. 72
8.2 SDI-12 commands supported by MSB780 . . . . . . . . . . . . . . . . . . . . . . 72
8.3 SDI-12commandsset................................. 73
8.4 a! Acknowledge Active Command . . . . . . . . . . . . . . . . . . . . . . . . . . 73
8.5 aI! Send Identification Command . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
8.6 ?!AddressQueryCommand ............................. 74
8.7 aAb! Address Change Command . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
8.8 aM! Start Measurement Command . . . . . . . . . . . . . . . . . . . . . . . . . . 74
8.9 aM1! Start Measurement Command, return also HQFE, HQNH . . . . . . . . . . 75
8.10aD0!SendDataCommand .............................. 75
8.11 aR0! Continuous Measurement (basic units) . . . . . . . . . . . . . . . . . . . . 75
8.12 aR1! Continuous Measurement (user units) . . . . . . . . . . . . . . . . . . . . . 76
8.13aV!GetVerification................................... 76
8.14 aXD1! Send data command from transducer 1 . . . . . . . . . . . . . . . . . . . 76
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MSB780(X) - User’s Guide
8.15 aXV! Get extended verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
8.16 Setting parameters via SDI-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
8.17 Reading parameters via SDI-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
9 Analog output 78
9.1 “amode” Set analog output range . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
9.2 “asel” Analog output quantity and scale . . . . . . . . . . . . . . . . . . . . . . . 80
9.3 “atest”Analogoutputtest ............................... 81
9.4 “aerr” Analog output error indication . . . . . . . . . . . . . . . . . . . . . . . . . 81
10 Technical Data 82
10.1Quantities........................................ 82
10.2Performance ...................................... 83
10.3Analogoutputaccuracy ................................ 84
10.4OperatingEnvironmental ............................... 84
10.5InputsandOutputs................................... 84
10.6Powerconsumption .................................. 84
10.7Drawings ........................................ 85
11 Troubleshooting 89
11.1Incaseofproblems... ................................. 90
12 Ordering Information 91
13 Firmware update 92
13.1 Hardware required for firmware update . . . . . . . . . . . . . . . . . . . . . . . . 92
13.2FirmwareLoadersoftware............................... 93
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MSB780(X) - User’s Guide
14 History of changes 98
14.1V1.1........................................... 98
14.2V1.2........................................... 98
14.3V1.2.1.......................................... 98
14.4V1.2.2.......................................... 98
14.5V1.2.3.......................................... 98
14.6V1.2.4.......................................... 98
14.7V1.3........................................... 99
14.8V1.4........................................... 99
14.9V1.5........................................... 100
14.10V1.6........................................... 100
14.11V1.7........................................... 100
14.12V1.8........................................... 100
14.13V1.9........................................... 100
14.14V1.10.......................................... 100
14.15V1.11.......................................... 101
14.16V1.12.......................................... 101
14.17V1.13.......................................... 101
14.18V1.14.......................................... 101
14.19V1.15.......................................... 101
14.20V1.16.......................................... 101
14.21V1.17.......................................... 102
14.22V1.18.......................................... 102
14.23V1.19.......................................... 102
14.24V1.20.......................................... 102
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MSB780(X) - User’s Guide
14.25V1.21.......................................... 102
14.26V1.22.......................................... 102
14.27V1.23.......................................... 103
14.28V1.24.......................................... 103
14.29V1.25.......................................... 103
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MSB780(X) - User’s Guide
1 Introduction
MicroStep-MIS MSB780 Barometer is designed for measuring absolute atmospheric pressure
in meteorological and environmental applications.
MSB780X is extended version of MSB780. It features pressure transducer of the same pre-
mium quality as MSB780, but allows using also two and three pressure transducers in one unit.
MSB780X comes also in a brand new design with touchscreen display option.
MSB780X field standard is a further extension to MSB780X, features built-in battery and a
connector for external relative humidity and temperature probe. It is portable and convenient for
field usage. It features also data recording function.
World class accuracy
MSB780 barometer provides excellent accuracy, long term stability and temperature de-
pendence. It is ideal for the most demanding applications, where exactness and durability
are required.
Reliability
MSB780 is of a durable hardware design. It is contained in heavy-duty metal enclosure
rated IP66. MSB780X version with touchscreen display is rated IP65. MSB780 features
self-tests and error reporting via SDI12 and serial lines.
Low power design
MSB780 is a low power consumption microprocessor controlled sensor ideally suited for
solar and battery powered applications.
Low power consumption helps to save valuable energy on sites without mains supply.
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MSB780(X) - User’s Guide
2 Hardware
2.1 Principle of operation
Sensor measurement principle is based on an oscillating tube, where frequency of oscillation
is dependent on density of the air inside. The oscillating tube is placed in vacuum. Measured
pressure comes inside the tube. Coil magnetic transducers are used to establish oscillation and
also to pick-up the signal.
The principle of measuring density of a gas counts on gas fractures of air. Using other gas as
pressure media would give incorrect pressure reading.
Note: Air must be used as a pressure medium during calibration.
2.2 Terminals
The terminals for connecting of wires are placed inside the device – unscrew 4 screws and
remove the cover to access the terminals.
The description of MSB780 terminals is in the figure 1. Description of MSB780X terminals is in
the figure 2.
If you have the MSB780X version with display, after opening the lid with display, disconnect the
display flat cable from the display connector on the mainboard. Before closing the lid, reconnect
the flat cable to the connector again, otherwise the display will not operate.
2.3 Power supply
The device is supplied by direct current, typically 12 V, or 24 V. Power supply terminals are
marked PWR+ and GND on the mainboard. For voltage range and typical power supply con-
sumption please see Technical Data on page 84.
2.4 Power consumption - model with touchscreen display
For models with touchscreen display option the overall power consumption may be reduced by
settings "Backlight off" time (Main menu - Display). In order to keep the data on display up to
date, the barometer measures continuously whenever the display is on, therefore consumes
more power. To conserve power at battery powered installations, set the Backlight off time to
the lowest possible value, for example 15 s.
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MSB780(X) - User’s Guide
Figure 1: MSB780 terminals
Figure 2: MSB780X terminals
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MSB780(X) - User’s Guide
Table 1: MSB780 RS-232 connector wiring
RS-232 cable wiring
MSB780 or MSB780X terminal male DB9 pin number
RXD 2
TXD 3
GND 5
2.5 Power saving mode
The barometer features power saving mode. It only applies for models without touchscreen
display option as the display measures continuously to keep the data up to date all the time.
The power saving mode is activated, if "smode" is set to "STOP" for both RS232 and RS485
(see cnf? command on page 34) and all the interfaces have been idle. Averaging (see avrg
command on page 43) has to be turned off as well. Falling into the power saving mode reduces
power consumption. Turning the barometer off by power button (if installed) reduces power
consumption to less than 50 µA.
To enable the power saving mode, connect to the service port using service cable, open your
favorite terminal program, set the port to 230400 Baud, 8N1 and issue the following commands:
terminal rs232<cr>
open 0<cr>
SMODE<cr>
STOP<cr>
tclose<cr>
terminal rs485<cr>
open 0<cr>
SMODE<cr>
STOP<cr>
tclose<cr>
avrg<cr>
0<cr>
2.6 Serial interface (RS-232)
Serial interface can be used to connect MSB780 or MSB780X sensor to a datalogger, or to a
PC. To connect to RS232 computer port, a serial cable is needed.
Wiring of a RS-232 to PC cable with DB9 connector can be found in table 1.
Standard serial interface supports asynchronous communication at speed 9600 bps. Default
parameters of RS-232 communication can be found in table 2. These parameters may be
changed using command seri<cr>, please refer to section 6.10 on page 38.
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MSB780(X) - User’s Guide
Table 2: RS-232 default parameters
RS-232 default parameters
Baud Rate 9600
Data Bits 8
Parity None
Stop bits 1
Flow control none
Table 3: Connecting MSB780 or MSB780X to SDI-12
Connecting MSB780 or MSB780X to SDI-12
GND SDI-12 Ground Line
+ V Supply SDI-12 12 V Line
SDI-12 data line SDI-12 Data Line
2.7 Connecting MSB780 or MSB780X to PC
To connect MSB780 or MSB780X to PC use serial cable (as described above). If the PC does
not feature a RS-232 port, a RS-232 to USB convertor may be used. After the sensor is con-
nected to PC, use a standard terminal program. Set serial line parameters according to section
“Serial Interface”. Each command is terminated by <cr>, or <cr><lf> ASCII characters. To test
the connection and settings, hit Enter. The sensor should reply as follows:
cmd??<cr><lf>
This reply means, that the sensor did not understand the command.
Note: By default, echo is turned off for MSB780 and MSB780X. If required, echo can be turned
on using echo1<cr> command.
2.8 SDI-12 interface wiring
To connect MSB780 or MSB780X to SDI-12 bus only 3 wires are needed, see table 3.
2.9 Service connector
Service connector enables connection to MSB780 at fixed communication parameters, see table
4. For serial service serial port the same commands as for user RS-232 are valid. Service con-
nector includes power supply connections (PWR+, GND), SDI-12 line and service UART (lines
SERVICE_RX, SERVICE_TX). Service UART is not directly compatible with RS-232. Service
UART uses 3.3 V voltage level. Direct connection to RS-232 may lead to damage of the barom-
eter. Special service cable with converter is required. This can be ordered from MicroStep-MIS.
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MSB780(X) - User’s Guide
Table 4: Service serial port parameters
Service serial port
Baud Rate 230400
Data Bits 8
Parity None
Stop bits 1
In case you have available 3.3 V TTL UART to RS-232 converter available, the service cable
may be built-up using schematic in Figure 3.
Figure 3: Service connector
Note: Service UART lines SERVICE_RX, SERVICE_TX may not be connected directly to RS-
232.
3 MSB780X transfer standard version
The version MSB780X transfer standard with battery comes in a carry case along with equip-
ment, as seen in the figure 4.
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MSB780(X) - User’s Guide
Figure 4: MSB780X transfer standard
The default accessories within the MSB780X transfer standard are listed in table 5.
Table 5: MSB780X transfer standard - list of default accessories
Number Accessory
1 Transport case
2 Foam interior
3 MSB780X transfer standard with built-in battery
4 RHT175 relative humidity and temperature probe
5 Connecting cable for RHT175 to the transfer standard
6 AC power supply charger
7 Cigarette lighter charger cable
8 AA battery pack
9 RS-232 communication cable
10 Dust plugs
11 User guides
17

MSB780(X) - User’s Guide
3.1 Connecting the external probe to the transfer standard
When the relative humidity and temperature measurements are to be done, the external RHT175
probe must be connected. Please follow the figure 5. Use the dedicated cable with connectors.
Always turn the metal part of the connector when connecting or disconnecting.
Figure 5: Connecting external RH/t probe to the transfer standard
The transfer standard with the external RHT175 probe connected is shown in the picture 6.
Figure 6: Connecting external RH/t probe to the transfer standard
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MSB780(X) - User’s Guide
3.2 Turning the transfer standard on/off
To turn the transfer standard power on/off, use the power button, see the figure 7. If the transfer
standard won’t turn on, please recharge it’s battery (follow section 3.3).
Figure 7: MSB780X transfer standard version - power button
3.3 Recharging the transfer standard battery
The power adapter for recharging the battery is supplied. To recharge the battery, connect
the adapter as per the figure 8and plug the adapter to the wall socket. The charging will be
completed within 3 hours. The ambient temperature must be within 0 to 50 ◦C, otherwise the
charging will not start.
Figure 8: Connection of the charger to the transfer standard
It is also possible to recharge the battery from the cigarette lighter receptacle using a dedicated
cable. See figure 9.
19