Compatible with all LC Gauges
using firmware 1.008 and above
PC Serial Port Settings
The recommended pc serial port settings are:
Baud – 9600
Parity – N
Data Bits – 8
Stop bit – 1
Flow Control – None
The LC Gauge will automatically detect the baud rate of the incoming data. Therefore, no settings need to be defined on the gauge for communications to work properly. Higher baud rates may be used if it is determined by the end user that communications will remain reliable.
Serial Command Summary
The command is followed by a space character, then the parameter. These command/parameters are expected to be followed by either a carriage return (\r or 0x0D) or a line feed (\n or 0x0A) character. Channels are 1, 2, 3 (CH2-CH1), or 4 (CH1-CH2).
|
Command |
Description |
Parameters |
Default Setting |
|
|
AUTOPWR |
Auto Power Down the Gauge |
0 (Never) to 255 minutes |
NEVER |
|
|
AUTOPWR? |
Query Auto Power Down Setting |
|
|
|
|
BATT? |
Queries Battery Status |
None |
|
|
|
CALCONST |
Set new calibration constants, used to restore blown away constants |
Channel, Calibration Gain1, Calibration Offset1, Calibration Gain2, Calibration Offset2, Inflection Point |
1,1,0,1,0, 0x2AAA (0x8000000 for LTC ADC) |
|
|
CALCONST? |
Dump raw Calibration constants |
Channel (1-2) |
|
|
|
CALDATA? |
Returns raw A/D counts for temperature and pressure along with uncalibrated voltage |
Channel (1-2) |
|
|
|
CALDATA1? |
Same as above accept returns uncompensated pressure (psi) and temperate (°C) instead of voltage |
Channel (1-2) |
|
|
|
CALDATE |
Override automatically generated calibration date |
Automatically set when Cal command is issued. Date is in the format MM/DD/YY, and allowable year values range from to 00-99. Viewed on the display, the year will show up as four digits with leading ‘20’ added to the two digit year that was set by the CALDATE command. Optional 2nd parameter used as a flag to show on display or menus (0=don’t show, <>0 show). If date is set to the default, it will not be displayed on power up or menu. |
8/8/15,0 |
|
|
CALDATE? |
Returns the Date of the last Calibration |
|
|
|
|
CALNDUE |
Override default calibration Next Due Date |
Default is 1yr from last calibration. Date is in the format MM/DD/YY, and allowable year values range from to 00-99. Viewed on the display, the year will show up as four digits with leading ‘20’ added to the two digit year that was set by the CALNDUE command. Optional 2nd parameter used as a flag to show on display or menus (0=don’t show, <>0 show). If date is set to the default, it will not be displayed on power up or menu |
8/8/16,0 |
|
|
CALNDUE? |
Returns the Date of the next calibration to be done |
|
|
|
|
CHANNEL |
Switch display to specified channel |
1-4 (max is 1 for LC10) 3 = ch2 – ch1 4 = ch1 – ch2 3 and 4 only work if both channels 1 and 2 are pressure sensors |
1 |
|
|
CHANNEL? |
Get selected display channel |
|
|
|
|
CUNIT |
Set custom unit parameters If name is blank, custom units will be disabled in favorites. Otherwise, it will be enabled. Names longer than 8 characters will generate a “Too Large” error. |
<name>,<offset>,<gain> |
Name = “CUSTOM “ Offset = 0.0 Gain = 1.0 |
|
|
CUNIT? |
Return custom unit’s parameters |
|
|
|
|
CUNIT2 |
Set second custom unit parameters. If name is blank, second custom unit will be disabled in favorites. Otherwise, it will be enabled. Names longer than 8 characters will generate a “Too Large” error. |
<name>,<offset>,<gain> |
Name = “CUSTOM2“ Offset = 0.0 Gain = 1.0 |
|
|
CUNIT2? |
Return second custom unit’s parameters |
|
|
|
|
DATA? |
Return data buffer |
|
|
|
|
DATE |
Set the date |
mm/dd/yy format |
11/11/15 |
|
|
DATE? |
Get the current date |
None |
11/11/15 |
|
|
DISPLAY |
Display Auto Power Down |
0 (Never) to 255 minutes |
NEVER |
|
|
DISPLAY? |
Query Display Auto Power Down setting |
|
|
|
|
FAVORITES |
Set Favorite Units Bitmap summation of all units available. Not all units are available for all gauge ranges (see Table 4). Must have at least one valid unit set.
Custom units are not added to FAVORITES until a valid CUNIT, CUNIT2 command is received.
The FAVORITES setting only affects which units are included when using the front panel UNITS key to cycle through the display units. It does not restrict which units can be set with the UNITS command. |
Value Bit 1 = atm 0 2 = bar 1 4 = cmH2O@4°C 2 8 = cmHg@0°C 3 16 = ftH2O@39°F 4 32 = inH2O@39°F 5 64 = inHg@32°F 6 128 = kgf/cm2 7 256 = kPa 8 512 = mbar 9 1024 = mmHg@0°C 10 2048 = MPa 11 4096 = oz/in2 12 8192 = psi 13 16384 = Torr 14 32768 = Pa 15 65536 = mmH2O@4°C 16 131072 = Custom1 17 262144 = Custom2 18 |
131071 |
|
|
FAVORITES? |
Get Favorite Units |
None |
|
|
|
FETCH? |
Display A/D Values |
None |
0.0 |
|
|
FETCH2? |
Return current reading 1, max 1, min 1, reading 2, max 2, min 2, reading 3, max 3, min 3, reading 4, max 4, min 4 |
None Notes: Readings 3 & 4 are only shown if channel 1 and 2 are both pressure sensors. Obviously, Readings 1 and 2 are only shown if the sensor is installed |
|
|
|
FETCH3? |
Returns readings on CH1-4 in psi or °C only |
None |
|
|
|
FILTER |
Disables A/D reading filter or set the type of filter and how many readings to filter.
Sets Damping Filter window for fast changing signals
Sets Display Damping Filter
There are 4 types of Filters as follows: 1) MOVING – The average of the last n readings. The oldest reading thrown out when next reading comes in. 2) REPEAT – the average of n new readings 3) MEDIAN – An odd number of new readings (n) are sorted and the middle ((n+1)/2) reading is the result. 4) DAMPING – exponential filter based on the data acquisition rate and the time constant specified
Other Settings: WINDOW – change in readings greater than this % of range reset filter. Affects the DAMPING filter and the display damping filter. |
OFF
WINDOW,0-100 (%) of range
DDAMP,(0-99.999)
MOVING, (2-11)
REPEAT, (2-11)
MEDIAN, (3, 5,7,9, or 11)
DAMPING, (0-999.999)
|
OFF
5%
0.25s
Moving = 10
Repeat = 10
Median = 5
Damping = 2.0
|
|
|
FILTER? |
Returns the filter settings |
None |
- |
|
|
FORMAT |
Sets the Time and Date Formats. Note that the date format that this command sets only applies to display. |
12 or 24, 0-2 0 = YYYY/MM/DD 1 = MM/DD/YYYY 2 = DD/MM/YYYY |
12, 0 |
|
|
FORMAT? |
Returns the Time and Date Formats |
None |
|
|
|
*IDN? |
Identify Unit |
IEEE-488.2 compliant device discovery command |
|
|
|
ILOOP |
Set 4-20mA current loop channel |
Channel (1-4) |
1 |
|
|
ILOOP? |
Return track channel |
|
|
|
|
INTERVAL |
Logging interval |
1-65535s |
1 |
|
|
INTERVAL? |
Return logging interval |
|
|
|
|
KEY |
Simulate a keypress (useful for running test modes remotely) |
L ((back)Light), H (Hi/Lo), P (Power), U (units), Z (Zero) |
|
|
|
KEY? |
Return last Key Pressed |
|
|
|
|
LIGHT |
Sets the LCD backlight level, and timeout Does Low Cost gauge have an adjustable time-out? |
0-100, 0 (never) - 255 seconds |
75, 60 |
|
|
LIGHT? |
Query the LCD backlight level, and backlight timeout |
|
|
|
|
LOG |
Enable/Disable logging |
START, STOP |
STOP |
|
|
LOG? |
Return data logging state |
|
IDLE |
|
|
MINMAX |
Reset Min/Max values |
Channel (1-4) |
|
|
|
MINMAX? |
Returns Min/Max values |
Channel (1-4) |
|
|
|
NICKNAME |
Sets Gauge nickname |
1-24 printable ASCII characters |
empty |
|
|
NICKNAME? |
Returns nickname |
|
|
|
|
PCCON |
Establish a Field Lab Session |
START, STOP |
inactive |
|
|
PCCON? |
Returns session status |
|
|
|
|
PCKEY |
Sets the Field Lab Session Key |
10digit Hex Key |
0000000000 |
|
|
PCKEY? |
Returns the session key |
None |
0000000000 |
|
|
RANGE |
Sets Lower and Upper range Values for bar graph and 4-20mA loop |
Channel (1-4), LRV, URV
|
Default LRV & URV are the full range of the sensor in the current units |
|
|
RANGE? |
Queries LRV & URV for given channel |
Channel (1-4) or MAX (optional) MAX will return the full range of the sensor in the current pressure/temperature units. |
|
|
|
RESET |
Perform a system reset |
None |
- |
|
|
RFAUTO |
Set RF Auto Turn On |
ON/OFF |
OFF |
|
|
RFAUTO? |
Query RF Auto Turn On |
|
|
|
|
RFCHAN |
Set ZigBee RF Channel |
Channels 11-26 |
26 |
|
|
RFCHAN? |
Query ZigBee RF Channel |
|
|
|
|
RTDCAL |
Set RTD coefficients for use with external temp probe (TX/TY) on channel 2 |
RTD Temperature curve: T(x) = a + b*x + c*x2 + d*x3, where x = calibrated resistance measurement |
-246.8037568 2.385004431 757.992612E-6 724.906794E-9 |
|
|
RTDCAL? |
Returns RTD coefficients |
None |
- |
|
|
RTDSN |
Set RTD Serial Number |
Up 15 character alpha-numeric |
NONE |
|
|
RTDSN? |
Query RTD Serial Number |
None |
- |
|
|
SAVE |
Save the current system parameters as the defaults |
None |
- |
|
|
SIZE? |
Returns how many points are in the buffer |
|
|
|
|
STATUS? |
Returns unit status value from 0-255 (8-bit bitmap)
|
No parameters - bits mapped as follows: •Bit 0 = Set if PCCON Start sent over USB. This would be cleared after PCCON STOP is sent over USB, USB is disconnected, or any reset occurs including power cycle. •Bit 1 = Set if PCCON Start sent over RF. This would be cleared after PCCON STOP is sent over RF, RF is disconnected, or any reset occurs including power cycle. •Bit 2 = Set if a Data Set has been Added (this happens on power up or after logging stops - which is how you actually have a named data set in the test mode display when logging is inactive) or deleted/aborted. This auto clears with STATUS? •Bit 3 = Set if settings have changed from the menu. For example if somebody recalled a test mode in the middle of programming a test mode, the new test mode settings would be corrupted. This auto clears with STATUS? •Bit 4 = Set if Units have changed. This auto clears with STATUS? •Bit 5 = Set if the reading has updated. Useful when logging is active with an interval set. This auto clears with STATUS? •Bit 6 = Set if Low Battery (0% remaining and not charging). Updated automatically. •Bit 7 = Set if Min/Max? reset. This auto clears with STATUS? |
188 |
|
|
SWITCH |
Set Switch 1 and 2 state |
Switch, Channel (1-4), Open Threshold, Close Threshold If Close>Open Close on rising pressure, open on falling pressure/temp If Open>Close Close on falling pressure, open on rising pressure/temp Thresholds are in % of range (0-100) |
1,1,48,52 2,1,52,48 |
|
|
SWITCH? |
Query Switch state |
|
|
|
|
TEMP |
Set Temperature Units |
C, F, K, or R |
C |
|
|
TEMP? |
Read the internal temp sensor in degrees C |
None |
- |
|
|
TIME |
Set the time |
hh:mm:ss format |
12:00:00 |
|
|
TIME? |
Get the current time |
None |
12:00:00 |
|
|
UNITS |
Set the pressure units
|
01 = atm 02 = bar 03 = cmH2O@4°C 04 = cmHg@0C 05 = ftH2O@39°F 06 = inH2O@39°F 07 = inHg@32°F 08 = kgf/cm2 09 = kPa 10 = mbar 11 = mmHg@0°C 12 = MPa 13 = oz/in2 14 = psi 15 = Torr 16 = Pa 17 = mmH2O@4°C 18 = <custom unit #1> 19 = <custom unit #2> |
14 |
|
|
UNITS? |
Get the pressure units |
None |
14 |
|
|
VER |
Displays the system version |
None |
- |
|
|
ZERO |
Zeroes out the displayed reading. Warning message issued if attempting to zero when current pressure reading is 10% of full scale or more. |
Channel (1-2), AUTO (or no parameter), OFF |
OFF |
|
|
ZERO? |
Returns the Zero offset adjustment value |
|
0.0 |
|
Serial Command Detailed Descriptions
AUTOPWR - Set Auto Power Down Timeout (0-255min). The gauge will physically power down after no commands or buttons are pushed for this timeout period.
AUTOPWR? - Query Auto Power Down Timeout
> autopwr 0
> autopwr?
Timeout = Never
> autopwr 10
> autopwr?
Timeout = 10 minutes
BATT? - Query Battery Info
> batt?
Voltage = 3.655 V
Counts = 0x27D
Capacity = 58%
CALCONST - Set calibration constants (Gain1, Offset1, Gain2, Offset2, Inflection Point as defined below). Gains should be close to 1.0 and offsets should be close to 0.0.
CALCONST? - Get calibration constants.
Assume 100psi full scale pressure range:
Gain1 = (50.0-0.0) / (Uncalibrated Reading@50psi - Uncalibrated Reading@0psi)
Offset1= -Gain1 * Uncalibrated Reading@0psi
Gain2 = (100.0-50.0) / (Uncalibrated Reading@100psi - Uncalibrated Reading@50psi)
Offset2= 50.0 - Gain2 * Uncalibrated Reading@50psi
Inflection Point = Counts@50psi
> calconst? 1
9.931574e-01,-5.948951e-01,9.918741e-01,-5.295181e-01,0x03FADEA1
> calconst 1,3.2,23,43,2.3,0x45
> calconst? 1
3.200000e+00,2.300000e+01,4.300000e+01,2.300000e+00,0x00000045
> calconst 1,9.931574e-01,-5.948951e-01,9.918741e-01,-5.295181e-01,0x03FADEA1
CALDATA? - Returns uncalibrated pressure and temperature voltage readings along with raw counts. Used in calibration and temperature compensation of the pressure and temp sensor. Counts are a signed 32-bit integer
CALDATA1? - Returns uncalibrated pressure (in psi) and temperature (in C) readings along with raw counts.
> caldata? 1
0.464787,9440
> caldata1? 1
50.345,9440
CALDATE - Sets the date of calibration.
CALDATE? - Queries the date of the last calibration.
CALNDUE - Set the date of the next scheduled calibration.
CALNDUE? - Queries when the unit should be calibrated next.
NOTE – These dates are always MM/DD/YY and their output format is not affected by the FORMAT command.
> caldate?
Cal Date: 01/01/14
> caldate 5/7/14
> caldate?
Cal Date: 05/07/14
> calndue?
Next Cal Date: 01/01/15
> calndue 5/7/15
> calndue?
Next Cal Date: 05/07/15
> save
System settings saved in non-volatile memory.
DATE - Set the date
DATE? - Get the current date
NOTE – This date is always MM/DD/YY and their output format is not affected by the FORMAT command.
> date 13/13/13
Invalid Date!
> date 12/13/11
> date?
Date: 12/13/11
DISPLAY - Set Display Power Down Timeout (0-255min)
DISPLAY? - Query Display Power Down Timeout
> display 0
> display?
Timeout = Never
> display 2
> display?
Timeout = 2 minutes
FAVORITES - Set Favorite units
FAVORITES? - Get Favorite units
> FAVORITES?
131071 (ALL)
> FAVORITES 8193
> FAVORITES?
8193 (ATM, PSI)
Table 2: Units Bit Map
|
Bit# |
Units |
Dec |
Hex |
|
18 |
Custom2 |
262144 |
40000 |
|
17 |
Custom |
131072 |
20000 |
|
16 |
mmH2O@4°C |
65536 |
10000 |
|
15 |
Pa |
32788 |
8000 |
|
14 |
Torr |
16384 |
4000 |
|
13 |
psi |
8192 |
2000 |
|
12 |
oz/in2 |
4096 |
1000 |
|
11 |
Mpa |
2048 |
800 |
|
10 |
mmHg@0°C |
1024 |
400 |
|
9 |
mbar |
512 |
200 |
|
8 |
kPa |
256 |
100 |
|
7 |
kgf/cm2 |
128 |
80 |
|
6 |
inHg @32°F |
64 |
40 |
|
5 |
inH2O@39°F |
32 |
20 |
|
4 |
ftH2O@39°F |
16 |
10 |
|
3 |
cmHg@0°C |
8 |
8 |
|
2 |
cmH2O@4°C |
4 |
4 |
|
1 |
bar |
2 |
2 |
|
0 |
atm |
1 |
1 |
FETCH? - Display A/D Value
> fetch?
CH0 Reading = 0.04 psi
CH1 Reading = 19.1 C
FETCH2? - Display A/D Value
> fetch2?
0.031psi,0.031,0.031,19.2C,20.01,18.2
FETCH3? - Display A/D Values in psi and °C only regardless of units setting
> fetch3?
0.031psi,19.2C
FILTER – Set pressure reading filters
FILTER? – Query filter settings
> filter?
FILTER TYPE = REPEAT, 10 rdgs,
> filter MOVING, 8
> filter?
FILTER TYPE = MOVING, 8 rdgs,
> filter off
> filter?
FILTER TYPE = OFF
FORMAT – Set Time and Date formats
FORMAT? – Query Time and Date formats
> FORMAT?
12H, 0 (YYYY/MM/DD)
> FORMAT 24
> FORMAT?
24H, 0 (YYYY/MM/DD)
> FORMAT 12,1
> FORMAT?
12H, 1 (MM/DD/YYYY)
> FORMAT 12,1
> FORMAT?
12H, 0 (YYYY/MM/DD)
*IDN? – Display Identity
> *idn?
RALSTON INSTRUMENTS, MODEL LC20-GR-00-W1, LC-000029, v1.007.001 Jun 21 2019 12:01:42
KEY - Set a key press command
KEY?
> key h
>key z
>key l
>key u
>key p
LIGHT– Set the backlight level (0-100%) and timeout (0-255sec)
LIGHT? – Query the backlight level and timeout
> light 0,0
> light?
Level = 000%
Timeout = Never
> light 50,120
> light?
Level = 050%
Timeout = 120 seconds
MINMAX– Reset Min/Max data
MINMAX? – Query Min/Max data
> minmax? 1
Max Reading = 0.616 psi; Min Reading = 0.493 psi
> fetch?
A/D Reading = 0.588 psi
> minmax 1
> minmax? 1
Max Reading = 0.593 psi; Min Reading = 0.587 psi
NICKNAME– Set device nickname for FieldLab PC application to easily identify specific gauges.
NICKNAME? – Query nickname
> nickname Keith’s 100psi Gauge
> nickname?
Nickname = Keith’s 100psi Gauge
PCCON– Start/stop Field Lab PC application session
PCCON? – Query session info
> pccon?
PC connection is active.
Session timer = 763:39:09
> pccon stop
Session Ended
> pccon?
PC connection is inactive.
Session timer = 763:39:39
> pccon?
PC connection is inactive.
Session timer = 763:39:39
> pccon start
Session Established.
> pccon?
PC connection is active.
Session timer = 00:00:10
PCKEY– Set Field Lab application key. Used to lock Field Lab sync data to a specific PC.
PCKEY? – Query Field Lab application key.
> PCKEY 1234567890
> pckey?
PC Key = 1234567890
RESET - Perform a system reset. On USB, it is highly recommended to close the COM port immediately after sending this command and re-open it again once USB enumeration has finished. Otherwise, windows may hold the com port open and not release it.
> reset
System Startup...
Ralston Digital Gauge
Version 0.001 - Built Dec 13 2011 14:33:41
SAVE - Save system parameters
> save
Settings saved.
STATUS? - Queries device status
> status?
Status = 0xBD
> status?
Status = 0x21
Table 3: Status Bits
|
Status Bit |
Name |
Decription |
|
0 |
USBCON |
Set if PCCON Start sent over USB. This would be cleared after PCCON STOP is sent over USB, USB is disconnected, or any reset occurs including power cycle. |
|
1 |
RFCON |
Set if PCCON Start sent over RF. This would be cleared after PCCON STOP is sent over RF, RF is disconnected, or any reset occurs including power cycle. |
|
2 |
DATA |
Set if a Data Set has been Added (this happens on power up or after logging stops - which is how you actually have a named data set in the test mode display when logging is inactive) or deleted/aborted. This auto clears with STATUS? |
|
3 |
CFG |
Set if settings have changed from the menu. For example if somebody recalled a test mode in the middle of programming a test mode, the new test mode settings would be corrupted. This auto clears with STATUS? |
|
4 |
UNIT |
Set if Units have changed. This auto clears with STATUS? |
|
5 |
RDG |
Set if the reading has updated. Useful when logging is active with an interval set. This auto clears with STATUS? |
|
6 |
LOBAT |
Set if Low Battery (0% remaining and not charging). Updated automatically. |
|
7 |
MINMAX |
Set if Min/Max? reset. This auto clears with STATUS? |
TEMP - Change Units to C, F, K, or R
TEMP? – Query Temperature settings
> temp C
> temp?
INT Temperature = 25.1 C
TIME - Set the current time
TIME? - Get the current time
> time
ERROR: Invalid Time!
> time 17:56:30
> time?
Time: 17:56:33
UNITS - Set the pressure units
UNITS? - Get the pressure units
> units?
Units = (14) psi
> units 10
New Units = mbar
> units?
Units = (10) mbar
List of units
01 = atm
02 = bar
03 = cmH2O@4C
04 = cmHg@0C
05 = ftH2O@39F
06 = inH2O@39F
07 = inHg@32F
08 = kgf/cm2
09 = kPa
10 = mbar
11 = mmHg@0C
12 = Mpa
13 = oz/sqin
14 = psi
15 = Torr
16 = Pa
17 = mmH2O@4C
18 = < Custom >
19 = < Custom2 >
|
Table 4: Valid Units |
Units |
|||||||||||||||||||
|
Sensor |
Full scale(psi) |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
|
GA |
-15 |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
|
X |
X |
X |
|
|
X |
X |
|
GB |
5 |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
|
|
GC |
-15 to 15 |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
|
|
X |
X |
|
|
GD |
15 |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
|
X |
X |
X |
|
|
GF |
30 |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
|
X |
X |
X |
|
|
GH |
50 |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
|
X |
X |
X |
|
|
GJ |
100 |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
|
X |
X |
X |
|
GL |
300 |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
|
|
X |
X |
|
GN |
500 |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
|
|
X |
X |
|
GP |
1000 |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
X |
|
|
X |
X |
|
GR |
3000 |
X |
X |
|
X |
X |
X |
X |
X |
X |
X |
X |
X |
|
|
|
X |
X |
||
|
GT |
5000 |
X |
X |
|
X |
X |
|
X |
X |
X |
X |
X |
X |
|
|
|
X |
X |
||
|
GV |
10000 |
X |
X |
|
X |
X |
|
X |
X |
X |
X |
|
X |
|
|
|
X |
X |
||
|
GX |
15000 |
X |
X |
|
X |
X |
|
X |
X |
X |
|
X |
|
|
|
X |
X |
|||
|
GY |
20000 |
X |
X |
|
|
X |
|
X |
X |
X |
|
X |
|
|
|
X |
X |
|||
|
GZ |
30000 |
X |
X |
|
|
X |
|
X |
X |
X |
|
X |
|
|
|
X |
X |
|||
VER - Displays the system version
VER? - Displays the system version
> ver
Ralston LC Gauge
Version 0.001 - Built Dec 13 2011 14:33:41
ZERO- Enable/Disable zero
ZERO? - Get the zeroing settings
> zero? 1
Zero Value = 0.000 psi
> fetch?
CH1 Reading = 0.591 psi
> zero 1,0
> fetch?
A/D Reading = 0.000 psi
> zero? 1
Zero Value = 0.591 psi
Note that zeroing only applies to pressure sensors. If a temperature sensor (e.g. RTD) is plugged into a channel and an attempt is made to set a zero value for that channel, the unit returns “Error: Invalid Configuration!”. Attempting to zero a non-existent channel will return “Error: Invalid Channel!”
Example: With temperature sensor on channel 1. Send
“zero 1,0.125”
Unit returns : “ERROR: Invalid Configuration!”.