SERIES CG
USER’S GUIDE
http://www.Cooperinstruments.com
TEL (540) 349-4746 • FAX (540) 347-4755
Table of Contents
SECTION 1- GENERAL ....................................................................................................................... 1
Controls................................................................................................................................................. 1
Orientation ............................................................................................................................................ 1
Mounting............................................................................................................................................... 1
SECTION 2- POWER............................................................................................................................ 2
SECTION 3 - CONFIGURATION .......................................................................................................2
SECTION 4 - FILTERS......................................................................................................................... 4
SECTION 5 - EXTERNAL TRIGGER MODE .................................................................................. 4
SECTION 6 - SET POINTS .................................................................................................................. 5
SECTION 7 - AVERAGE MODE ........................................................................................................5
SECTION 8 - GAUGE CONTROL LANGUAGE.............................................................................. 6
SECTION 9 - OUTPUTS ....................................................................................................................... 7
RS-232 .................................................................................................................................................. 7
Mitutoyo BCD ...................................................................................................................................... 7
Analog................................................................................................................................................... 7
I/O connector pin diagram .................................................................................................................... 8
SECTION 10 - CALIBRATION ........................................................................................................... 8
SECTION 11 - SPECIFICATIONS...................................................................................................... 8
General.................................................................................................................................................. 8
Capacity x graduation ........................................................................................................................... 8
Dimensions ........................................................................................................................................... 9
SECTION 12 - WARRANTY................................................................................................................ 9
Limited Warranty On Products............................................................................................................. 9
Obtaining Service Under Warranty .................................................................................................... 10
CF 140 CG i (V-32 1030 0604)
SECTION 1- GENERAL
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
MODE (ADVANCE) Switches the display between normal and peak modes of operation
CLEAR (ESCAPE) Clears peak readings from memory
Orientation
In order to accommodate a variety of testing requirements, the
orientation of the loading surface may be set up in either of the two
positions shown below. Follow the instructions below to change the
loading surface orientation:
1. Remove the four screws in the rear housing
2. Separate the front and rear housings
3. Remove the two inside screws, separating the front housing and front
panel assembly, as depicted below
4. Rotate the front panel assembly 180º
5. Reassemble the front housing and front panel assembly
6. Attach to rear housing, and retighten the four screws
Upright orientation Alternate orientation
(as supplied) (for test stand mounting, etc.)
Mounting
To mount the gauge to a test stand, line up the ¼” hole in the gauge’s housing with the protruding dowel pin in
the gauge plate. Then, fasten four thumb screws through the gauge plate into the gauge housing.
CF 140 CG 1 (V-32 1030 0604)
Gauge shown mounted on a Model TSF test stand
SECTION 2- POWER
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.
SECTION 3 - CONFIGURATION
Series CG 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
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
CF 140 CG 2 (V-32 1030 0604)
FA 1 2.5 Hz RC filter enabled
FLTd – Digital 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
1,200 1,200 baud
2,400 2,400 baud
4,800 4,800 baud
9,600 9,600 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 bit, 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
bcd d Mitutoyo BCD output disabled
bcd E Mitutoyo BCD output enabled
nPOL Mitutoyo reading without polarity (absolute value)
POL Mitutoyo readings with polarity; positive for compression, negative for tension
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
Aout – Automatic output (RS-232)
no Automatic output disabled
1 Every sample transmitted
2 Every 2
4 Every 4
8 Every 8
16 Every 16
32 Every 32
64 Every 64
128 Every 128
nd
sample transmitted
th
sample transmitted
th
sample transmitted
th
sample transmitted
nd
sample transmitted
th
sample transmitted
th
sample transmitted
CF 140 CG 3 (V-32 1030 0604)
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
dEL Initial delay prompt
trF Trigger force value prompt
CAL – Calibration. See Section 10.
SECTION 4 - 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 CG 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.
SECTION 5 - 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 forces. When this mode is enabled through the
configuration menu (see Section 3), the MODE key will sequence through an additional state that is indicated by
the flashing “C” or “T” indicator.
CF 140 CG 4 (V-32 1030 0604)
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).
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.
SECTION 6 - SET POINTS
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 non-volatile 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 indicators, buzzers or relays as required
for the application.
After the Set Point mode is enabled through 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 the ▲ 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 sued for re-entering the set point change mode or the MODE key for proceeding with the
normal operation of the gauge.
SECTION 7 - AVERAGE MODE
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-programmable
parameters associated with this 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.
Press MODE until “A” is displayed and then CLEAR
or ZERO to begin testing. The process of averaging
begins as soon as the programmed trigger force 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.
CF 140 CG 5 (V-32 1030 0604)
SECTION 8 - 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)
SP Enable Set Point mode
SPD 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
ETD 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
CUR Current mode (real time display)
PT 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
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
CF 140 CG 6 (V-32 1030 0604)
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 setting 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:
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.
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
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$(27)THEN SYSTEM
70 PRINT#1”?”
80 LINEINPUT#1,A$
90 PRINTA$
100 GOTO40
SECTION 9 - OUTPUTS
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 (SPACE OR -)][DATA][SPACE][UNITS(IF ENABLED)][CFLF]
The display will flash “Err” and no data will be transmitted if DATA 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.
CF 140 CG 7 (V-32 1030 0604)
I/O connector pin diagram
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 “
SECTION 10 - CALIBRATION
Mount the gauge firmly with the loading surface directed 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 surface 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 ‘nnn’ 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 11 - SPECIFICATIONS
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 filter settings. 65 times per
second in peak mode.
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 1.8 lbs [0.8 kg]
Capacity x graduation
CG500 500.0 x 0.2 lbF 250.0 x 0.1 kgF 2500 x 1 N
CG1000 1000.0 x 0.5 lbF 500.0 x 0.2 kgF 5000 x 2 N
CF 140 CG 8 (V-32 1030 0604)
Dimensions
in[mm]
SECTION 12 - WARRANTY
Limited Warranty On Products
Any of our products which, normal operating conditions, proves defective in material or in workmanship within
one year from the date of shipment by Cooper, will be repaired or replaced free of charge provided that you
obtain a return material authorization from Cooper and send the defective product, transportation charges
prepaid with notice of the defect, and establish that the product has been properly installed, maintained, and
operated within the limits of rated and normal usage. Replacement or required product will be shipped F.O.B.
our plant. The terms of this warranty do not extend to any product or part thereof which, under normal usage,
has an inherently shorter useful life than one year. The replacement warranty detailed here is the buyer’s
exclusive remedy, and will satisfy all obligations of Cooper whether based on contract, negligence, or otherwise.
CF 140 CG 9 (V-32 1030 0604)
Cooper is not responsible for any incidental or consequential loss or damage which might result from a failure of
any and all other warranties, express or implied, including implied warranty of merchantability or fitness for
particular purpose. Any unauthorized disassembly or attempt to repair voids this warranty.
Obtaining Service Under Warranty
Advance authorization is required prior to the return to Cooper. Before returning the item, contact the Repair
Department c/o Cooper Instruments at (540) 349-4746 for a Return Material Authorization number. Shipment to
Cooper shall be at buyer’s expense and repaired or replacement items will be shipped F.O.B. our plant in
Warrenton, Virginia. Non-verified problems or defects may be subject to a $100 evaluation charge. Please
return the original calibration data with the unit.
CF 140 CG 10 (V-32 1030 0604)
Loading...