Series BG
DIGIT AL FORCE GAUGES
User's Guide
User's Guide
TABLE OF CONTENTS
GENERAL - SECTION 1 ....................................................................2
Controls ................................................................................2
Orientation ............................................................................2
Mounting ...............................................................................3
POWER - SECTION 2........................................................................3
CONFIGURA TION - SECTION 3 .........................................................3
FIL TERS - SECTION 4 .......................................................................6
EXTERNAL TRIGGER MODE - SECTION 5 .......................................6
SET POINTS - SECTION 6.................................................................7
A VERAGE MODE - SECTION 7.........................................................7
GAUGE CONTROL LANGUAGE - SECTION 8...................................8
OUTPUTS - SECTION 9 ...................................................................10
RS-232................................................................................10
Mitutoyo BCD......................................................................10
Analog.................................................................................10
I/O connector pin diagram ...................................................10
CALIBRA TION - SECTION 10 ........................................................... 11
SPECIFICA TIONS - SECTION 11 .....................................................11
General ............................................................................... 11
Capacity x graduation.......................................................... 11
Dimensions .........................................................................12
WARRANTY - SECTION 12 .............................................................12
3
Series BG
GENERAL
Section 1
Controls
Six keys on the front panel are used for all functions and control of the instrument.
Some have more than one function, depending on the mode of operation. The main
functions are labeled above the keys and the secondary functions are below the keys
in smaller type. In the list below the secondary functions are in parenthesis. For a
detailed description of the secondary functions see Section 3.
POWER (ENTER) Turns power on and off
UNITS ( ) Selects units of measurement
ZERO ( ) Zeroes any tare value (up to the full capacity of the
instrument) and clears the peak readings
DATA Initiates a data transmission sequence (if equipped with
the communication option)
MODE (ADVANCE) Switches the display between normal and peak modes
of operation
CLEAR (ESCAPE) Clears peak readings from memory
Orientation
In order to accomodate a variety of testing requirements, the orientation of the loading
shaft may be set up in either of the two positions shown below. In order to change the
loading shaft orientation, simply unscrew two screws on the back side of the housing,
separate the two housing halves, rotate one half 180° and reassemble.
Loading shaft
BG
SERIES
ZERO
UNITSPOWER
CLEAR
MODE
DATA
ESCAPE
ADVANCE
BGSERIES
ZEROUNITSPOWER
CLEAR
MODE
DATA
ESCAPE
ADVANCE
Loading shaft
Upright orientation
(as supplied)
Alternate orientation
(for stand mounting, etc.)
4
Mounting
BGSERIES
User's Guide
DOWEL PIN
MOUNTING PLATE
0.125 [3.2]
Section 2
Gauge shown mounted
on Model TSC test stand
POWER
BOTTOM PLATE
0.187 [4.75]Ø
Recommended use of a dowel pin
The gauge is powered by a 7.2-volt NiCd rechargeable battery. Since batteries are
subject to self-discharge, it may be necessary to recharge the unit after a prolonged
period of storage. Plug the accompanying charger into the AC outlet and insert the
charger plug into the receptacle on the gauge. The gauge may be operated for 8-10
hours after approximately 16-18 hours of charging. Do not use chargers other than
supplied or instrument damage may occur.
There are three levels of low battery voltage indication. At the first level, the display
shows a steady "LO BAT" indicating approximately one hour of charge remaining. The
second level is indicated by a flashing "LO BAT". At the third level, the whole display
except the "LO BAT" indicator will flash for three seconds after which time the gauge
will turn itself off. This prevents the instrument from working at voltages too low for
reliable operation.
CONFIGURATION
Section 3
The Series BG gauges have several features with programmable options allowing
many user-specified choices. In order to access the configuration menu, perform the
following:
1. Turn off the gauge
2. Press and hold MODE
3. Turn on the gauge
4. Release MODE
5
Series BG
The software version number will be displayed for a short time followed by "FLtA". The
following secondary functions of keys are used during the configuration process.
ADVANCE Step through menu choices
ENTER Select a menu choice
ESCAPE Quit any function (no change)
& Increment or decrement displayed values
The following list shows all configuration options. Italics indicate factory settings.
FLtA - Analog filter
FA 0 2.5 Hz RC filter disabled
FA 1 2.5 Hz RC filter enabled
FL Td - Digit al filters
FC 1 No filtering of current (displayed) readings
FC 2 Average of 2 samples for each reading
FC 4 Average of 4 samples for each reading
FC 8 Average of 8 samples for each reading
FP 1 No filtering of peak readings
FP 2 Average of 2 samples for each peak reading
FP 4 Average of 4 samples for each peak reading
FP 8 Average of 8 samples for each peak reading
232 - RS-232 settings
232d Output Disabled
232E Output Enabled
300 300 baud
600 600 baud
1200 1200 baud
2400 2400 baud
4800 4800 baud
9600 9600 baud
7-1E 7 data bits, 1 stop bit, even parity
7-1o 7 data bits, 1 stop bit, odd parity
7-2E 7 data bits, 2 stop bits, even parity
7-2o 7 data bits, 2 stop bits, odd parity
7-2n 7 data bits, 2 stop bits, no parity
8-1E 8 data bits, 1 stop bit, even parity
8-1o 8 data bits, 1 stop bit, odd parity
8-1n 8 data bits, 1 stop bit, no parity
8-2n 8 data bits, 2 stop bits, no parity
Ft F Full data (numeric + units)
Ft n Numeric data only
out - Outputs selection (other than RS-232)
SP d Set point outputs disabled
SP E Set point outputs enabled
6
User's Guide
bcd d Mitutoyo BCD output disabled
bcd E Mitutoyo BCD output enabled
nPOL Mitutoyo readings without polarity (absolute value)
PO L Mitutoyo readings with polarity; positive for compres-
Et d External trigger disabled
Et E External trigger enabled in edge mode
Et L External trigger enabled in level mode
EtHL Data capture during high to low transition of trigger signal
EtLH Data capture during low to high transition of trigger signal
sion, negative for tension
Aout - Automatic output (RS-232)
no Automatic output disabled
1 Every sample transmitted
2 Every 2nd sample transmitted
4 Every 4th sample transmitted
8 Every 8th sample transmitted
16 Every 16th sample transmitted
32 Every 32nd sample transmitted
64 Every 64th sample transmitted
128 Every 128th sample transmitted
AoFF - Automatic shutoff settings
no Disabled
1 1-minute automatic shutoff
5 5-minute automatic shutoff
10 10-minute automatic shutoff
20 20-minute automatic shutoff
30 30-minute automatic shutoff
init - Initial (default) settings
LB Pounds as default units
KG Kilograms as default units
N Newtons as default units
A Average mode at turn on
EtE/EtL External trigger mode at turn on
TC Real time display at turn on
PEAK T Peak tension display at turn on
PEAK C Peak compression display at turn on
A - Average mode settings
A E Average mode enabled
A d Average mode disabled
dE L Initial delay prompt
A t Average time prompt
trF Trigger force value prompt
7
Series BG
CAL - Calibration. See Section 10.
FILTERS
For maximum flexibility in noise suppression and peak capturing ability of the instrument, there are two types of filters available to the user: analog and digital.
The analog filter is a simple RC network with a cutoff frequency of 2.5 Hz and attenuation of 20 dB/decade. It can be either turned on or off.
The digital filter utilizes the moving average technique in which consecutive readings
are "pushed" through a buffer and the displayed reading is the average of the buffer
contents. By varying the length of the buffer, a variable smoothing effect can be
achieved. The BG is equipped with a buffer which can hold up to eight readings. The
number of readings to be averaged can be set to 1,2,4 or 8. The selection of 1 will
disable the filter since the average of a single value is the value itself.
The analog and the digital filters should be disabled or set to their minimum
acceptable values for highest peak capture speed.
EXTERNAL TRIGGER MODE
This mode of operation is useful for measuring electrical contact activation force as
well as synchronization of multiple instruments for a "snap-shot" view of applied
TRIG
GND
USER - SUPPLIED
SWITCH UNDER TEST
3
5
GAUGE
+5V
47K
forces. When this mode is enabled through
the configuration menu (see Section 3),
the MODE key will sequence through an
additional state which is indicated by the
flashing "C" or "T" indicator.
When in this mode, the instrument stops
updating the display when the trigger signal is applied. It is possible to capture the
reading with a normally open contact (high
to low transition of the trigger signal) or a
normally closed contact (low to high transition).
Section 4
Section 5
The display will show the captured reading until ZERO or CLEAR is pressed if the
"edge" mode is set. The "level" mode provides for the display to hold the reading only
until the trigger signal returns to its original state.
Please refer to the diagram for connection details and to Section 3 for configuration
information.
8
User's Guide
SET POINTS
Section 6
This feature is useful for tolerance checking (GO/NO GO) or alarm indication in process
control applications. Two limits, high and low, are specified and stored in the nonvolatile memory of the instrument and all readings are compared to these limits. The
results of the comparisons are indicated
through the three open-collector outputs provided on the 9-pin connector, thus providing
"under", "in range" and "over" signaling.
These outputs can be connected to indica-
+
tors, buzzers or relays as required for the
_
application.
2N3904
GND
4OUT
8
9
5
40 ma MAX
SAME
AS ABOVE
LOAD
24V MAX
After the Set Point mode is enabled through
GAUGE
USER - SUPPLIED
the configuration menu (see Section 3),
pressing the MODE key will sequence
through an additional step indicated by "SP" on the display. To enter or change the
values of the set points press ENTER. The high set point is displayed. Use and
keys to increase or decrease the value and MODE for changing between tension and
compression. When the desired value is displayed, press ENTER and repeat the above
steps for the low set point. After entering both values "donE" will appear on the display.
Press ENTER to store the changes or ESCAPE to quit. In either case "SP" will appear on
the display and the ENTER key may be used for re-entering the set point change mode
or the MODE key for proceeding with the normal operation of the gauge.
AVERAGE MODE
Section 7
This mode is used for obtaining an average force reading over a specified period of
time. Applications include measurement of peel force, muscle strength, frictional force
and any other tests requiring time-averaged readings. There are three user-program-
mable parameters associated with this
FORCE
PEAK
AVG
AVE
TRIGGER
FORCE
mode: trigger force, initial delay and
average time. The programming of
these parameters and the enabling of
the Average mode are done during the
gauge setup. Please refer to the "Configuration" section for more information.
DELAY
is reached and is indicated by a flashing "A". The conclusion of the test is indicated by
an alternating "A" and the calculated value. The readings obtained during the initial
delay will not be part of the average, but the peak value is stored for later recall. A new
test may be started by pressing CLEAR or ZERO.
AVERAGE TIME
Press MODE until "A" is displayed and
TIME
then CLEAR or ZERO to begin testing.
The process of averaging begins as
soon as the programmed trigger force
9
Series BG
GAUGE CONTROL LANGUAGE
The instrument can be controlled by an external device through the RS-232 channel.
The following is a list of supported commands and their interpretations. All commands
must be terminated with a Carriage Return character (hex 0D) or with a Carriage
Return/Line Feed combination (hex 0D+0A). The gauge responses are always terminated with a Carriage Return/Line Feed.
A Enable Average mode
AD Disable Average mode
AM Select Average mode (if enabled)
ATn Average time. n=0.1-300.0 seconds
DELn Initial delay. n=0.1-300.0 seconds
TRFn Trigger force. n=value (+ for compression, - for tension)
S P Enable Set Point mode
S P D Disable Set Point mode
SPHn High set point. n=value (+ for compression, - for tension)
SPLn Low set point. n=value (+ for compression, - for tension)
AOFFn Auto-shutoff. n=0,1,5,10,20,30 minutes. 0=always on
AOUTn Auto-transmit every nth reading. n=0,1,2,4,8,16,32,64,128. 0=disabled
LB Switch units to pounds
KG Switch units to kilograms
N Switch units to Newtons
G Switch units grams
ET Enable External trigger mode
ET D Disable External trigger mode
ETE Edge triggered External trigger mode
ETL Level triggered External trigger mode
HL Reading captured on a high to low transition
LH Reading captured on a low to high transition
Section 8
CUR Current mode (real time display)
P T Peak Tension mode
PC Peak Compression mode
CLR Clear peaks, start a new average, or external trigger test
Z Zero display and perform the CLR function
? Request the displayed reading
?C Request the current reading
?PT Request the peak tension reading
?PC Request the peak compression reading
?ET Request the reading obtained during the External trigger mode
?A Request the average reading obtained during the Average mode
FLTCn Digital filter for current (displayed readings). n=1,2,4,8
FLTPn Digital filter for peak readings. n=1,2,4,8
FLTAn Analog filter (2.5 Hz). n=1,2. 1=on, 0=off
10
User's Guide
FULL RS-232 transmission with units
NUM RS-232 transmission without units (only numeric values)
MIT Enable Mitutoyo output
MITD Disable Mitutoyo output
POL Mitutoyo outputs with polarity. (+ for compression, - for tension)
NPOL Mitutoyo outputs without polarity (absolute value)
PM Print/send data to a Mitutoyo compatible device
Sn Set output bit (open collector, pull to ground). n=0,1,2
Cn Clear output bit. n=0,1,2
Rn Read current status of output bit or level of input pin. n=0,1,2,3
SAVE Save current settings in nonvolatile memory
CAL Enter Calibration mode. See Section 10 for more information
LIST List current settings and status. Here is a typical LIST output:
Any detected errors are reported back by means of the following error codes.
*10 Illegal command
*11 Not applicable; e.g. SPHn command without enabling the set points
*21 Invalid specifier; e.g. AOFF2
*22 Value too large
*30 Calibration weight too high
*31 Calibration weight too low
*50 Communication error
*51 Command string too long
V3.00;LB;PC;FLTC8;FLTP1;FLTA1;AOUT00;AOFF05;FULL;MIT;POL;B0
All fields are separated by ";". The first field shows the software version, the
last field shows the remaining battery power (B0=full charge, B3=minimum
power). All other fields show the status of settings and features using the
same abbreviations as the commands to set them.
Following is a sample BASIC program illustrating the use of some commands. It switches
the units to kilograms and sets the display to zero. Press any key to get a reading on the
screen. Use "ESC" to exit the program.
10 CLS: OPEN "COM1:9600,N,8,1,RS,CS,DS,CD,LF" AS #1
20 PRINT #1 "KG"
30 PRINT #1 "Z"
40 PRINT "PRESS ANY KEY FOR READING OR <ESC> TO EXIT"
50 KEYPRS$=INKEY$: IF KEYPRS$="" THEN 50
60 IF KEYPRS$=CHR$(27) THEN SYSTEM
70 PRINT #1 "?"
80 LINE INPUT #1,A$
90 PRINT A$
100 GOTO 40
11
Series BG
OUTPUTS
Section 9
RS-232
The data transmission can be initiated by pressing the DATA key or by an external
device by sending ASCII "?" to the gauge. The gauge will respond by sending the
current reading in either full or numeric format, depending on the configuration settings
(see Section 3). Polarity sign indicates tensile (-) or compressive (+) forces. The
transmitted string has the following format:
[POLARITY (SP ACE OR -)][DATA][SPACE][UNITS (IF ENABLED)][CRLF]
The display will flash "Err" and no data will be transmitted if DA TA is pressed during the
average computation while in the Average mode or during the input scanning in the
External trigger mode.
Mitutoyo BCD
This output is useful for connection to data collectors, printers, multiplexers or any
other device capable of accepting Mitutoyo BCD data. The transmission is initiated by
the DATA key or by the receiving device (see Section 3 for settings).
Analog
This output can be used for chart recorders, oscilloscopes, data acquisition systems,
or any other compatible devices with analog inputs. The output produces ±1 volt at full
scale of the instrument. The polarity of the signal is positive for compression and
negative for tension.
I/O connector pin diagram
1298345
7
6
DB-9P
12
1 RS-232 receive Input
2 RS-232 transmit Output
3 Mitutoyo request Input
External trigger "
Input bit 3 "
4 Mitutoyo clock Output
"Within" set point output "
Output bit 2 "
5 Signal ground --6 +Analog signal Output
7 +12V DC Output
8 Mitutoyo ready Output
"Under" set point output "
Output bit 1 "
9 Mitutoyo data Output
"Over" set point output "
Output bit 0 "
User's Guide
CALIBRATION
Mount the gauge firmly with the loading shaft pointing downward. Go into the configuration mode as described in the previous section and select the calibration sub-menu
by pressing ENTER three times when the display shows 'CAL'. After the display shows
'null' press ZERO, while insuring that there is no weight on the loading shaft other than
the weight of the required attachments (hooks, etc.). The next displayed prompt is
'SPAn' at which time apply the exact weight equal to the full capacity of the gauge
in pounds and press ENTER. A successful calibration procedure is indicated by 'donE'
on the display. Press ENTER to save the new calibration data and to return to normal
operation. In some cases the display will show 'nnnn' or 'uuuu' to indicate excessive or
insufficient calibration weight. This can be caused by incorrect weights, tare weight of
over 10% of the full capacity of the gauge or an overloaded sensor. The calibration
procedure may be aborted without changing the previous calibration information at
any time by pressing ESCAPE.
Section 10
SPECIFICATIONS Section 11
General
Accuracy: ±0.2% of full scale ±1 count
Tare capacity: 110% of capacity. Display shows "----" at 110%
Overload capacity: 150% of capacity. Display shows "----" at 110%
Sampling rate: 65 samples per second
Display update: 2.5-10 times per second in normal mode, depending on
Display: 4-1/2-character LCD 0.3" [7.6 mm] high
Load cell deflection: Maximum 0.010" [0.25 mm] at full scale
Outputs:
RS-232: Baud rates between 300 and 9600
Mitutoyo: Standard Mitutoyo SPC BCD output
Analog: ±1 VDC ±0.25% FS
Connector: 9-pin D-type male
Power: 7.2 NiCd battery or included AC adapter/charger
Battery life: 8-10 hours per charge
Weight: 0.9 lbs [0.4 kg]
filter settings. 65 times per second in peak mode
Capacity x graduation
BG012 0.12 x 0.00005 lbF 50 x 0.02 gF 0.5 x 0.0002 N
BG025 0.25 x 0.0001 lbF 100 x 0.05 gF 1 x 0.0005 N
BG05 0.5 x 0.0002 lbF 250 x 0.1 gF 2 x 0.001 N
BG2 2 x 0.001 lbF 1 x 0.0005 kgF 10 x 0.005 N
BG5 5 x 0.002 lbF 2 x 0.001 kgF 25 x 0.01 N
BG10 10 x 0.005 lbF 5 x 0.002 kgF 50 x 0.02 N
BG20 20 x 0.01 lbF 10 x 0.005 kgF 100 x 0.05 N
BG50 50 x 0.02 lbF 25 x 0.01 kgF 250 x 0.1 N
BG100 100 x 0.05 lbF 50 x 0.02 kgF 500 x 0.2 N
BG200 200 x 0.1 lbF 100 x 0.05 kgF 1000 x 0.5 N
BG500 500 x 0.2 lbF 250 x 0.1 kgF 2500 x 1 N
13
Series BG
Dimensions
in [mm]
MODELMODEL
BG025-BG200
BG012-BG200
BG500
B
POWER UNITS
DATA
2.53 [64.3]
MODE
ADVANCE
BGSERIES
ZERO
CLEAR
ESCAPE
0.200 [5.8]
0.312 [7.9]
ØA
Ø A
B C THREAD
0.19 [4.8]
0.44 [11.2]
0.420 [10.7]
C
2.250 [57.2]
#6-32 X4
1.50 [38.1]
0.35 [8.9]
0.31 [7.9]
Ø 0.188 [4.8]
2.130 [54.0]
#10-32
5/16-18
THREAD
0.88 [22.4]
5.90 [149.9]
4.500 [114.3]
WARRANTY Section 12
Mark-10 Corporation expressly warrants to its buyer for three (3) years from the date
of delivery that the goods sold are free from defects in workmanship and materials.
Mark-10 Corporation will, at its option, repair or replace or refund the purchased price
of goods found to be defective. This remedy shall be the buyer's sole and exclusive
remedy. Any modification, abuse, exposure to corrosive environment or use other than
intended will void this warranty. This warranty is in lieu of all other warranties, including implied warranties of merchantability and fitness for an intended purpose. In no
event shall Mark-10 Corporation be liable for any incidental and consequential damages
in connection with goods sold or any part thereof.
14
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