Cooper Instruments RON 2501-125T Installation Manual

RON 2501

WIRELESS MULTI-FUNCTION

TENSION LOAD METER

(CRANE SCALE / DYNAMOMETER)

User’s Guide

www.cooperinstruments.com

PH: [phone] • FAX: [phone]

CONTENTS

GENERAL CAUTIONS AND WARNINGS...................................................................................................................1

1.0 GENERAL DESCRIPTION.....................................................................................................................................3

2.0 BATTERY CARE AND MAINTENANCE...............................................................................................................4

3.0 OPERATION...........................................................................................................................................................4

4.0 TARE ......................................................................................................................................................................5

5.0 MAX. (=PEAK HOLD) ............................................................................................................................................5

6.0 OVERLOAD WARNINGS.......................................................................................................................................5

7.0 CALIBRATION.......................................................................................................................................................6

8.0 OPTIONS................................................................................................................................................................7

8.1 Set Points – Adjusting and General Scheme......................................................................................................7

8.2 Units - Selecting ..................................................................................................................................................7

8.3 Time – Adjusting (only if the system includes the “real time clock” Option)........................................................8

8.4 RS-232 Communication Data – if applicable ......................................................................................................8

8.5 Print – Mode, Selection .......................................................................................................................................8

8.6 Baud Rate Selection............................................................................................................................................9

8.7 Totalizer – only if applicable................................................................................................................................9

8.8 Data Logger – only if applicable........................................................................................................................10

8.9 Connector Cables..............................................................................................................................................10

8.9.1 Sealed, Round 5-pin Connector.................................................................................................................10

8.9.2 Sealed, Round 3-pin Connector.................................................................................................................10

8.10 The Hot Industry Version – only if applicable..................................................................................................10

8.11 Continuous Max. Display – only if applicable..................................................................................................11

8.12 Dampened Readings.......................................................................................................................................11

9.0 ERROR TABLE....................................................................................................................................................12

10.0 TROUBLESHOOTING .......................................................................................................................................12

11.0 SUITABLE SHACKLES.....................................................................................................................................13

WARRANTY REPAIR POLICY..................................................................................................................................14

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GENERAL CAUTIONS AND WARNINGS

THE CAUTIONS AND WARNINGS, SYSTEM SPECIFICATIONS AND USER INSTRUCTION SHEETS SHOULD
BE READ CAREFULLY BEFORE ATTEMPTING TO USE THIS PRODUCT.

Products are supplied with the express understanding that the purchaser and/or the user are thoroughly familiar
with their correct application and proper use. Cooper Instruments will assume no responsibility for the misuse or
misapplication of any of its products.

In addition to these guidelines, the user must also comply with general safe operating practice, and when using the
systems for weighing during lifting, the user must also comply with safe operating practice during lifting.

The load limit rating (or “capacity”) indicates the maximum force or load a system can carry under normal working
conditions. Overloading, or placing a load on the system above its rated capacity is dangerous and therefore is
STRICTLY PROHIBITED, except during annual safety testing of the system, to be performed by qualified
personnel, when overload of up to 25% of rated capacity is permitted.

Cooper Instruments will accept no liability for damage caused by the product being used in excess of the working
load limit (capacity of the system) or from abuse.

Opening or attempting to open the systems and, needless to say, any attempt to repair the systems by
unauthorized personnel (without written authorization) will nullify the warranty as well as the manufacturer's liability,
and could be dangerous.

When measuring loads using shifted zero or tare, the actual loading is the indicated value (the readout) plus the
value of the shifted zero or tare.

The system is designed for static loading. Cooper Instruments or other qualified engineering personnel should be
consulted before using the system to measure dynamic loads.

Avoid bending, side loading and off-axis loading.

When connecting the load cell in order to measure forces or loads, special care should be taken to choose the right
connecting accessories that will permit free movement and prevent bending moments in the load cell.

Use shackles with S.W.L. (Safe Working Load) equal to, or greater than the system's maximum capacity

Check the system thoroughly before use, including the lifting accessories that are included in some of the RON
systems. Do not use a damaged system.

We recommend that the systems be checked occasionally by lifting a known weight. We recommend that the
systems be sent back to the manufacturer for general examination once every year.

Do not use the system with an unknown load if there is any doubt as to the reliability of the load indication. To
check its reliability, use only a known load with a value of more than 50% and less than 100% of the system’s
rated capacity (load limit).

The permitted temperature range appears in the RON systems specification. Do not allow the systems to overheat.
Doing so might be dangerous.

Take particular care not to expose the system to nuclear radiation. Local environmental conditions such as extreme
temperatures (which exceed the temperature range stated in the system's specification), chemical materials, radio
transmissions or other magnetic radiation may interfere with reliable system operation and may cause a false (low)
reading which could prove dangerous. Avoid using the system under such conditions. The system is not explosion­proof and should not be used in hazardous areas.
System calibration should be performed annually, in an authorized laboratory, unless laws, regulations, or other
policies dictate alternative intervals for calibration.

CF 116 1 23.04.08 n.g.

Between calibrations, the user can verify whether the systems are still calibrated correctly by using a known weight.

Calibration verification and adjustment must be performed with extreme care since a wrong calibration adjustment
will result in false readings, which could be dangerous.

Unless otherwise specified, Cooper Instruments products are not legal for trade.

Each system consists of a load cell with its own indicator.
Important

: If you own several systems, make sure that each load cell is used with its original indicator. Load cells

and indicators are calibrated as matched pairs and are non-interchangeable.

At all times, it is the responsibility of the user of this equipment to ensure that normal safety precautions
are observed. No amount of safety features and engineering can be a substitute for common sense and a
desire to work safely.

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1.0 GENERAL DESCRIPTION

RON 2501 is available either as a Shackle or Hook Type; RON 2501 Shackle Type is a dynamometer with remote
display, RON 2501 Hook Type is a Crane Scale with remote display. The RON 2501 consists of a load cell and an
Indicator. These two items are designed to work together.

The indicator is held by the user, so that under no circumstances will he have to approach the load in order to read
the result. By this means, his personal safety is ensured.

Communication between the load cell and the indicator is wireless. The effective transmission range is 50m under
normal working conditions. This feature enables the system to be used in hot industries and in circumstances
where using a cable is not possible, or is inconvenient.

The load cell panel includes an ON/OFF button. When the load cell is functioning correctly the red light on the panel
flashes at approximately 5 sec. intervals.

The indicator includes a control panel and a display. The standard control panel has six push buttons to operate
and program the system. It also includes the hidden key “ESC”.

Each system offers these push-button features:

• On/Off

• Zero

• Tare (100% of capacity)

• MAX (=Peak hold)

• User calibration

The 5-digit display shows the following information:

• The measured load

• Two level overload warning

• Max. value (=Peak hold)

• Low battery warning for both load cell and indicator

• The following modes: SLEEP, TARE, NET

• The units in use (Lbs, Kgs, etc.)

• Instructions during programming procedure etc.

The RON 2501 is available calibrated in lbs, kgs, metric tons, short tons, Newtons, deca-Newtons, or kilo Newtons.

RON 2501 options include:

1. Digital RS-232 output for communication with computers, printers, etc., user-selectable; continuous data flow or
print on demand.

2. User-selectable baud rate

3. User-adjustable set points

4. User-selectable units

5. Additional remote wireless display/s, similar to the main one

6. Additional remote display 2” (50mm) LCD with cable

7. Totalizer, for totaling up accumulated loads

8. Data logging: stores data and time, up to 600 load measurements, with print capability

9. Data logger with extended memory capacity for storing up to 3000 load measurements

10. Rechargeable batteries (instead of disposable) and a charger to charge batteries inside the system

11. Specially fitted carrying case

12. Indicator belt clip (for hanging the ABS indicator on a belt)

13. Heat shield for hot industries

14. Clock – real time clock

15. Aluminium indicator instead of the standard ABS one.

16. Multi load cells with one summing up indicator.

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2.0 BATTERY CARE AND MAINTENANCE

The standard system is equipped with disposable 1.5V (“finger”) type Alkaline batteries fixed in special battery
racks. The load cell contains 4 and the indicator 3. The battery rack is located in the lower part of the indicator.

To replace batteries, press the two small latches on both sides of the lower part of the indicator. The battery rack is
just behind the lower indicator box cover that is released by the two latches. The load cell batteries can be replaced
by opening the two screws securing the body cover – the one without the antenna.

Use high quality, high-energy Alkaline 1.5V AA size batteries. Batteries rated 3AH will function for 1500 hours in
good radio reception conditions. This represents more that 2 months of continuous operation. Occasional use will
extend battery life up to several years.

There are “low battery” warnings on the display, one for the load cell and the other for the indicator.
Load cell: T.L.BAT = Transmitter low battery
Indicator: R.L.BAT = Receiver low battery
When the Low Battery sign first appears, several hours still remain before the system will shut down as self­protection against damage from too low voltage.

The system can function with rechargeable batteries instead of the disposable ones. You may use the NiMH AA

1.2V rechargeable batteries (minimum 1800mAH or higher). You can use regular chargers that can be purchased

in electric and/or electronic equipment shops. In this case, you will have to recharge the batteries outside the
system.

Warning! Do not charge disposable batteries. They may explode.

Option

: Rechargeable batteries complete with a charger for charging the batteries when they are inside the system.

The system includes internal charging circuits: one in the load cell and the other in the indicator. The charger has
two separate output single pin connectors (jacks) for connecting to the sealed receptacles. When not in use, seal
the receptacle using the special threaded cup.

The batteries should be recharged:

1. Prior to using the unit for the first time

2. Before use, if more than 2 months have elapsed since the last charge

3. When the Low Battery sign blinks on the display

A full charge will take 10-14 hours.

3.0 OPERATION

To operate the system, press the load cell ON/OFF key until the red “power” LED illuminates. Keep the key
depressed for a second or two after it illuminates. The red light should flash at approximately 5 second intervals.
Check that it lights again. Turn the indicator on by pressing the ON/OFF key until your hear the bleep and the
display shows the units in use – Lbs, Kgs or other. This indicates the measuring value. A short TR.ERR
(Transmission Error) sign may appear in between. The receiver indicator synchronizes itself to its paired transmitter
(load cell). If it does not succeed, the TR.ERR sign will be displayed. If this sign remains for 5 seconds, an “ESC”
sign will replace the TR.ERR.

Press the ESC key. If there is one row of keys on your indicator, the escape key is not visible. You will find it
indicated above the MAX. key. Pressing the ESC key initiates the indicator. It will attempt to receive its paired load
cell transmissions. If it succeeds, the indicator will start showing measurements. If it does not, it will show TR.ERR
for several seconds and then “ESC” again.

Check if the load cell (red) power LED flashes (about once every 5 seconds). If it does not, try to start it by pressing
the ON/OFF key and repeat the above-mentioned procedure.

If the problem was not solved in the above procedure, switch off the load cell and the indicator and return the
complete system for repair.

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The available units in this system are:
M.TON = Metric Ton
S.TON = Short Ton = “American Ton = 2000 lbs.
Lbs
Lbs x 10
K.NTON = Kilo Newton
DECA.N = Deca Newton
N.WTON = Newton
KG

Before loading the unit, press the “ZERO” key until the word “zero” is displayed. The zero value will be displayed
after a few seconds.

Please check that the indicator is in the “off” position after use. When not in use, the system should be kept in its
carrying case (if applicable) or in other suitable protective covering.

General remarks on operating the keyboard:

When pressing a key, the system responds with a short audio signal (beep) followed by a displayed sign. For
example, if one presses the MAX. key, the MAX. sign will be displayed. The key should be pressed continuously
until the visual sign appears. There is one exception: If several keys are pressed in sequence as part of a password
(code) during calibration, the visual signal will appear after completing the code, but the beep will follow each valid
key operation. If the code is not accepted, the “FAIL” sign will appear. In this case, a new attempt should be made.

4.0 TARE

The system features a Tare function that enables the user to ensure the display reads zero (0) even though there
may be a weight on the system such as slings or shackles or a receptacle. This capability makes the RON 2501
easy to use as it eliminates the need for the operator to subtract the weight of slings or shackles or a receptacle
when only the net amount of the load is required. Pressing the Tare button causes the display to blink twice “NET”
and then indicates 0000. To cancel the “NET” mode, press the “TARE” key until “GROSS” is displayed and then the
GROSS value will follow. The system blinks “NET” once every minute as a reminder that mode in use is “NET”. If
one presses the TARE key when zero is displayed (0), the “NET” sign will appear on the display followed by the
“GROSS” sign. This happens because “NET” and “GROSS” in this case are identical.

CAUTION: When measuring loads using shifted zero as tare, the actual loading is the indicated value (the

readout) plus

the value of the shifted zero.

5.0 MAX. (=PEAK HOLD)

The RON 2501 features a MAX. (=PEAK HOLD) function. MAX. is very useful when the maximum weight that the
system has detected must be known.

Press the MAX. key until the display shows “MAX”. and the maximum load the system has encountered from the
last time the system was turned on will be displayed for approximately 2 seconds. When active, 2 pairs of flashing
vertical points on the display will indicate the maximum weight detected and that the system in MAX. mode. MAX.
can be manually reset at any time by turning the system off and on.

6.0 OVERLOAD WARNINGS

As a special safety feature, the RON 2501 is designed so that the display will flash when the maximum permitted
capacity of the system has been reached. Should this occur, the lift should be terminated immediately
down the load.

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by setting

Should the system be drastically overloaded (133% of the system’s capacity), “DANG.R” which means “DANGER”
will appear on the display. Only when the system is completely unloaded will the “DANG.R” message disappear. In
this case, it is essential that the RON system, together with all loading/lifting devices, including rigging accessories,
be checked by an authorized inspector before it is used again.

Both of these situations are dangerous to personnel and should be avoided at all costs.
can also result in costly damage to the system. Even if the tare option is functioning, the circuitry is designed to
successfully detect an overload.

The overload value is always the Gross weight even if the system is in “NET” mode. This is the reason for having
an overload warning below the capacity value displayed when in “NET” mode.

Overloading the RON 2501

7.0 CALIBRATION

It is recommended that the calibration procedure be performed by authorized and skilled personnel only! It
should be performed using an accurate known weight or in a laboratory.

Unless otherwise required by local laws, it is recommended that the system be calibrated once a year. The weight
used in the calibration must not exceed the system’s capacity. Use the highest available weight (not exceeding the
capacity value) in order to achieve the best results. If the system includes a dampened display, the dampening
should be cancelled before calibrating. (See chapter: “Dampened Readings” below). The system is protected by
two different codes to avoid calibration by unauthorized personnel.

Main Code
Press ESC + Enter simultaneously. The display will show: CODE? Press MAX. until the beep is heard and then
ZERO, until the beep is repeated. If you have not finished within 8 seconds, the system will return to measuring
mode. You may try again. The display responds by showing; CALIB meaning calibration.

If your system includes an optional function that is supported by a programmed producer, the menu may at first
display a function other than calibration. In this case press the arrow keys up↑ and/or down↓ arrows to select the
CALIB function.

Press ENTER. The display responds with CODE? Press ESC + ENTER simultaneously and then TARE. The
display shows the units in use = Lbs (or any other) and then LOAD.O meaning unload the system to zero the load.

Following this, press the ENTER key. The display will show WAIT for a few seconds and then L.VALU = LOAD
VALUE meaning that the known load that one intends to use for calibrating the system should be declared. This
should be done by using the current measuring units (that were displayed earlier in this procedure).

When the known load is already applied (lifted), press ENTER. The display will show the capacity as an opening
value. Using the up and down arrows, scroll the display to the load value you intend to use for the calibration. The
scrolling should be done by selecting the leftmost digit first. Then select the next digit to the right, and so on.

(ATTENTION: If you are not pressing any button for 8 seconds, the system will eject out of calibration mode and
you will need to restart the calibration mode from its beginning.)

The rate of scrolling increases depending on how long the arrow key is pressed. Initially, the rightmost digit scrolls
at a rate that can be detected. With continued pressing, the rate increases causing the second digit to scroll at a
rate that can be detected. The longer one presses, the higher the scrolling rate, causing the next digit to be
scrolled. When one stops pressing and starts again, the rate will be the initial one that permits the rightmost digit to
be selected. A few minutes scrolling are all that is necessary to become proficient with this procedure.

When the display is showing a value that is identical to the known load, press ENTER. The display will show
“WAIT” for a few seconds and then OK, CALIB. Press ESC. The system returns to measuring mode.

If at any stage during the procedure one wishes to quit, press the ESC key. The system will return to measuring
mode. If it does not do so, switch the system OFF and ON again. If the calibration procedure is terminated before

:

CF 116 6 23.04.08 n.g.

completion by pressing ESC or by switching off, it will cause the part of the procedure that has been completed to
be erased.

8.0 OPTIONS

To enter the options programming procedure one must use the main code, which is: press: ESC + ENTER
simultaneously. CODE? will be displayed. Press MAX (until the beep is heard) and then ZERO (until the beep is
heard). The display responds by showing the first option function. If the code is not accepted, FAIL will be
displayed. Try the entire code procedure again from the beginning.

To change the displayed option press the arrow keys ↑up or ↓down until the option you require is found. To enter
the calibration procedure, you will be requested to use an additional code, which is described in the CALIBRATION
section.

8.1 Set Points – Adjusting and General Scheme

To enter the programming procedure menu options follow the instructions in chapter 8. Select the SET P by using
the ↓down and ↑up arrows.

Press: ENTER. S/P 1 is displayed. Press: ENTER. The display will show the units in use by blinking and then the
set point 1 current level value. To adjust the new set point desired level, press the up↑ and down↓ arrows. See the
guide points in Chapter 7 CALIBRATION.

After obtaining the desired level on the display press ENTER. O.K. will be displayed (blinking) and then S/P 2.
Press ENTER and then proceed the same way as previously in S/P 1. Finish this procedure by pressing ENTER.
O.K. (blinking) will follow and then S/P 1.

Press ESC to quit the SET POINT adjustment procedure. The display: SET P. Press ESC again to quit the menu or
use the arrows to select another procedure in the menu.

General Scheme

An example for connection of set point 1 to a relay:

+

D

A

Relay

B

-

Limits: 12-24 VDC @ 200mA max.

5 pin connector

8.2 Units - Selecting

To enter the programming procedure menu options, follow the instructions in Chapter 8.

Select the UNITS procedure by using the up↑ and/or down↓ arrows. Press: ENTER. The units in current use will be
displayed. Using the up↑ and/or down↓ arrows, select the new units required.

The available units are:
Lbs.
Lbs x 10
K.NTON = Kilo Newton

CF 116 7 23.04.08 n.g.

DECA.N = Deca Newton
N.WTON = Newton
KG = Kg
M.TON = Metric Ton
S.TON = Short Ton

Press: ENTER. The display will blink the new selected units, and then it will blink O.K. and then UNITS again.

To select another procedure in the menu, use the up↑ and/or down↓ arrows. To quit the menu, press ESC.

8.3 Time – Adjusting (only if the system includes the “real time clock” Option)

To enter the programming procedure menu options, follow the instructions in Chapter 8.

Select the TIME procedure by using the up↑ and/or down↓ arrows. Press: ENTER. Display: YEAR. Press: ENTER.
Display: 2000. With the two rightmost digits blinking, select the correct year by using the up↑ and/or down↓ arrows.
Press: ENTER. Display: O.K. (blinking) and then MONTH is displayed. Press: ENTER….. The procedure continues
until the minute selection is completed.

To quit the TIME procedure, press ESC and return to the main menu. To exit the menu press: ESC. To enter
another procedure, use the arrows.

8.4 RS-232 Communication Data – if applicable

Possible baud rates 1200 2400 4800 9600 19200 38400
Default = 9600 b.p.s.
Length: 8 bits
Stop bits: 1 bit
Paring bit: none

8.5 Print – Mode, Selection

If applicable, i.e. only if system is equipped with RS-232 output option.

To enter the programming procedure menu options, follow the instruction in Chapter 8.

Select the PRINT procedure by using the up↑ and/or down↓ arrows. Press: ENTER. Display: D.MAND or CONT. To
change from the one displayed, use one of the up or down arrows. D.MND = DEMAND, meaning: “print on demand
mode”. CONT. = Continuous, meaning continuous printing mode.

Demand mode

Continuous mode

1. Continuous-unconditional
second.

2. Continuous-upon value change
in this value. If it changes constantly, the printing will occur at a rate of approximately once per second.
If there is no change in the display value – there is no printing. In such case the print-on-demand is active as
well.

Available print commands

• PRINT – prints the current displayed value.

• MAX. PRINT – prints the max. value displayed since the system was last switched on.

• TOTAL PRINT (if applicable) – prints the value of the summed up loads and the number of loads that were

• DATA L. PRINT – prints all the load values that were logged in the data logger memory since the last data

When printing for the first time (after switching the system on) the Heading (six lines) will be printed. The first six
lines are the system’s owner identification. It is programmed by the manufacturer according to the buyer’s choice.

: The RS-232 output will occur only by demand, i.e. by using the PRINT key.

: There are two continuous modes, both are factory set.

: the value showing on display will be printed at time intervals of approximately 1

: the value showing on display will be printed only when there occurs a change

actually summed up.

logger reset.

CF 116 8 23.04.08 n.g.

There are 6 lines. Each included a max. of 60 characters. The seventh line is the heads of the columns to be
printed later.

A “PRINT” line includes the following:

1. The value (5 digits)

2. The units

3. TARE mode “NET” or “GROSS”

4. Function: DATA =displayed data

MAX=PEAK HOLD=max. value
TOT.21=totalized value and number of loads summed up, 21 in this case.
D.L. 1=Data logger line #1
D.L. 2=Data logger line #2

5. DATE & TIME – if the system is equipped with a “Real Time Clock” option.

8.6 Baud Rate Selection

If applicable, i.e. only if the system is equipped with the RS-232 output and user-selectable baud rate
options.

To enter the programming procedure menu options, follow the instructions in Chapter 7.

Select the BAUD.R = BAUD RATE procedure menu using the up↑ and/or down↓ arrows. Press: ENTER. Display:
Blinks O.K. and then displays the baud rate that is currently in use. Use the up↑ and/or down↓ arrows to select the
desired rate. Available baud rates are: 38400 19200 9600 4800 2400 1200 bps.

Press: ENTER. The display will blink the chosen baud rate and then the display will blink O.K. and BAUD.R.

To quit the main menu press ESC.
To enter another menu procedure use the up↑ and/or down↓ arrows.

8.7 Totalizer – only if applicable

The totalizer sums up loads. To sum up an additional load press TOTAL. After TOTAL is displayed press ENTER.
The display will blink ADD and then N 17 will follow, meaning load #17 has been added and the current TOTAL in
the memory (25840 for example) will follow for a short time. The display returns to show current measured loads. If
the system rejects the load to be added, the reason for rejecting the load will be displayed by ERR.32 meaning; this
load had been already added.

A special “filter” in the totalizer program prevents the possibility of summing up the same load twice. This is a very
practical feature, because if the operator is unsure if he has already summed up the current load, he just has to try
to add it. If it has already been entered, the system will reject it. This filter is based on the fact that there is a
“ZERO” value between two adjacent loadings. If the system does not find a zero before the current load, it will
reject it. “ZERO” for this purpose is within ± 5% of the system’s capacity. ERR.32 means there was no zero value
after the previous load.

The system will only accept loads having the same “Tare mode”, i.e. GROSS or NET. If the first load to be entered
in the totalizer memory is NET, then no GROSS loads will be accepted. In such a case ERR.34 will be displayed.

The totalizer will reject overloads by displaying IGNOR followed by EPR.33. The totalizer memory resets itself
automatically when switching the system on. So, if you want to reset the totalizer, you must switch the system
“OFF” and then after 4 seconds or more, switch the system “ON” again.

Press “TOTAL” to obtain number of loads and the total value displayed. The totalizer “knows” how to add loads in
different units. It does all the calculations needed to convert the values in the memory to the one you have selected.
It is possible to start totalizing loads measured in Lbs and switch over to S. TONS or any other available unit and to
continue to sum up. The system will display and print the summed up value in the current measuring units. You can
even “translate” a load value you have in the totalizer by switching to a different measuring unit, provided the user
selectable units option is included. Press the TOTAL key to obtain load value in the new selected measuring units.

CF 116 9 23.04.08 n.g.

8.8 Data Logger – only if applicable

The data logger will store up to 600 measured values (and up to 3000 in the extended memory version). The data
stored with each measured value:
The measured units
The TARE condition: GROSS or NET
The running number: 1,2,3… in the memory.

If the system is equipped with a “real time clock” (optional), the year, month, day, hour and minute will also be
stored.

To store an additional value, press the DATA L. key. DATA L. will be displayed. Then press ENTER. To read all the
stored info press DATA L. followed by PRINT. (See also Section 8.5 PRINT).

To reset the data logger press DATA L. and then RESET.

8.9 Connector Cables

8.9.1 Sealed, Round 5-pin Connector

A. Vext (for S.P. 5-12 VDC, 100mA max.)
B. S.P. 1 (Set Point)
C. RS-232
D. GND RS-232 & G ext (for S.P.)
E. S.P. 2 (Set Point)

8.9.2 Sealed, Round 3-pin Connector

A. GND
B. –
C. RS-232

8.10 The Hot Industry Version – only if applicable

The hot industry version has the following special features:

• A load cell heat shield, including an isolating fiber jacket and a metal plate to protect the load cell against

direct heat radiation.

• Load cell temp. measuring system - the L.C. temp is displayed in real time on the indicator, enabling the user

to avoid temperatures above 80° C (175°F) in the L.C. The temp. readings on the indicator display will appear
above 60°C (140°F) every 60 seconds for about ½ a second. In L.C. temperatures above 70°C (160°F) every
30 seconds and in L.C. temperatures above 80°C (175°F) it will be displayed continuously, without displaying
the weight until the temp falls below 77°C (170°F).

The hot industry version option enables the user to cancel the temp. being displayed and all the announcements,
i.e. T.L.BAT (transmitter low battery), R.L.BAT (receiver low battery), NET and units. This permits the display to
show the measured values continuously without interruption. This feature is needed at critical moments, for
example when pouring molten metal from the furnace to the ladle to reach a desired weight of metal in the ladle. If
the current weight vanished form the display at this critical moment when the pouring has to be stopped, there is a
good chance that the correct weight in the ladle will overshoot, causing considerable damage.

To operate: press ENTER + TARE simultaneously. The display will show NO.TEM meaning NO TEMPERATURE =
temperature will not be displayed, nor the other announcements mentioned previously.

To cancel: press the same two keys ENTER + TARE. The display will show TEM.ON meaning: TEMPERATURE
ON = the temperature and the announcements will be displayed. Switching the system off in NO.TEM mode will
terminate this mode, i.e. when switching the system on, the mode in use will be TEM.ON (temp displayed).

Hot industry crane scale applications require special features in order for the scales to function reliably in these
hostile environments. The severest task for the crane scale is weighing a ladle containing molten metal. In the

CF 116 10 23.04.08 n.g.

case of steel, the temperature of the molten metal exceeds 1000°C (1800°F) and there is a great deal of direct heat
radiation. There is little chance of an extension cable surviving in this environment. The extension cable is usually
required when using a remote readout. This means that the crane scale should be 1) either with a large display
integrated with the load cell, or 2) a remote wireless (RF) indicator type. The former is not popular because there
are critical times when reading the scale is essential and rising smoke frequently obscures the display in a way that
makes it impossible to read the weight. In these circumstances the RON 2501 provides the ideal solution for
weighing hot ladles in a foundry.

The RON 2501 includes an internal thermometer (optional) that transmits the load cell interior temp to the indicator.
The limit is 80°C (175°F). The ambient temp in the ladle weighing location is many hundreds of degrees Celsius. In
order to delay the rise in interior load cell temp and prevent it reaching the limit of 80°C (175°F), a special fiber heat
shield is supplied. This shield covers the load cell’s electronic housing and delays the temp increase inside the load
cell where the electronic boards including the RF transmitter are located. This shield only delays the rise, it cannot
prevent it. If the RON 2501 system with the heat shield is used in an ambient temperature of 90°C (195°F) for a
long enough period of time, the internal temperature will rise to 90°C(195°F), which is above the system’s working
temperature limit. However, the system will function in much higher temperatures provided that it is exposed for
short periods of time, short enough not to reach the interior temperature limit, followed by cooling to the lowest
ambient temperature locally available. The temperature will decrease slowly because the insulating jacket delays
the decrease of load cell internal temperature.

If the load cell is placed in a well-ventilated location (e.g. opposite a fan), the rate of cooling will be increased. What
is required is a cycle with a short heat exposure time and a cooling phase long enough for the interior temperature
to remain below the 80°C(175°F) limit. This procedure will solve the problem of weighing hot foundry ladles. The
heat shield package also included a radiation shield consisting of a metal plate that protects the load cell electronic
housing from the heat radiating form the molten metal.

Some ways of improving conditions during the heat exposure phase:

• The distance between the load cell and the heat source should be as great as possible. There are cases
where it is possible to install the load cell above the crane hoist. In this instance, the distance from the heat
source is greater and consequently the load cell shielding is also improved.

• Whenever possible, the foundry ladle should be covered to decrease the ambient temperature and direct
heat radiation.

• In some cases, drops of molten metal will spray from the ladle. Use suitable means to protect the load cell
and prevent molten drops from hitting the heat shield jacket and in particular, to prevent them from adhering
to the jacket. This will avoid damage to the jacket, which can affect its insulation properties.

The heat shield jacket is produced by a leading firm, using fiber (JT650G1) having heat protection of 500°C(940°F)
in continuous use and 600°C(1150F°) for short periods.

8.11 Continuous Max. Display – only if applicable

When in use, the indicator will display the max. value continuously. When a new measured value is higher than the
max. displayed, this value becomes the new max. and will be displayed continuously until a higher measured value
is detected.

To activate
“MAX.ON” and switches itself to the “continuous max. display” mode and continuously displays the max. value that
was detected from the time the system was switched on.

To cancel
“MAX.OF”.

The max. value will be stored in memory and can be displayed for about two seconds whenever the user presses
the max. key. To reset the max. value, switch the system off. When switching on, the max. value is reset
automatically.

the “continuous max. display” press the MAX. + ENTER keys simultaneously. The display will indicate

the “continuous max. display” mode, press the two keys MAX. + ENTER simultaneously. The display:

8.12 Dampened Readings – if applicable

CF 116 11 23.04.08 n.g.

To switch on the dampening mode, press the keys ZERO + TARE simultaneously. The display will show AVR.ON.
To switch off the dampening mode, press both keys again. The display will show AVR.OF.

When calibrating the system, avoid using dampening, i.e. switch off the dampening mode.

When lifting a load from zero in dampened mode, you will have to wait a few seconds until the display stabilizes at
the correct value, but it will be significantly quicker compared to an undampened reading.

9.0 ERROR TABLE

Error # Meaning

01 Memory failure
03 Calibration; Load value above capacity
04 Not legal zero command; Value above 30% of capacity
05 Not legal zero command; Unstable load value for zeroing
07 Totalizer summed-up value overflow.
08 Data logger. Fully logged. No additional memory volume left.
10 Data logger. This option does not exist in this system.
15 Real Time Clock (RTC): This option is not included in this system.
20 RS-232, set point/s options are not included in this system.

25/26 ON/OFF command failed. Try again.

31 Totalizer. The system did not have a zero load before the last loading.
32 Totalizer. Trying to sum-up “zero” load.
33 Totalizer. Trying to sum-up an overload.
34 Totalizer. Trying to sum up NET & GROSS loads.
49 Totalizer. This option is not included in this system.
50 More than one key pressed. More than 3 seconds.

51-59 A key is pressed more than 3 seconds.

60 Display overflowed.
80 Failure in type #.

81 3001 Rx data received erratically.
100 3001 Decimal point wrong.
102 Data logger appears in the menu, but actually does not exist.
104 Baud rate is not according the standard values.

10.0 TROUBLESHOOTING

1. The load cell will not turn on
a) Try pressing the ON/OFF key again until you see the red LED light.
b) Open the battery compartment cover. Check the battery connections and wiring.
c) Remove the batteries and replace them in the holder to improve contact.
Check the battery pack voltage (with a voltmeter). The voltage should be above: 4.6V
If it is not – replace (disposable) or charge (rechargeable) the batteries.
d) If you cannot check the voltage, try replacing the batteries.
e) After replacing the batteries and switching it on, it may start but does not succeed in completing the task.

Wait for a few seconds and try again.

2. The load cell cannot be switched off
a) Disconnect the batteries and then reconnect them.
b) Start the l.c. again and try to switch it off again.

• If it does not switch off, it can still be used until you have an opportunity to send it to an authorized service
center. The system will function for more than 2 months (or more than 1.5 months with rechargeable
batteries) if it remains “on” permanently.

3. The indicator will not start

CF 116 12 23.04.08 n.g.

a) Try pressing the ON/OFF key again until you hear the beep.
b) Open the battery compartment cover. Check the battery connections and wiring.
c) Remove the batteries and replace them in the holder to improve contact.
Check the battery pack voltage (with a voltmeter). The voltage should be above: 3.45V If it is not – replace

(disposable) or charge (rechargeable) the batteries.
d) If you cannot check the voltage, try replacing the batteries.
e) After replacing the batteries and switching it on, it may start but does not succeed in completing the task.

Wait for a few seconds and try again.

4. The indicator cannot be switched off
a) Disconnect the batteries and then reconnect them.
b) Start the system again and try to switch it off.

5. The system switches itself off
a) If it is the load cell, check its batteries (see 1b, 1c & 1d).
b) If it is the indicator, check its batteries (see 3b, 3c, & 3d).

6. “DANGER” is displayed even when unloaded
a) Press ZERO. If the display is not zeroed send the system to a service station. The load cell is most probably

the reason.

11.0 SUITABLE SHACKLES

Capacity in
metric tons

Size Cap. In short

G209
1 3/8” 1/2” 3 1/3 M650A
2 3/8” 1/2” 3 1/3 M650A
3 1/2” 1/2" 3 1/3 M650A
5 5/8” 3/4" 7 M652A

10 1” 1 1/8” 15 M655A
12 1” 1 1/8” 15 M655A
15 1 1/8” 1 1/4" 18 M656A
20 1 3/8” -

G-2140 G-5263

25 1 1/2" 1 1/2" 30 M857A 30
30 1 1/2" - - 30
40 1 3/4" 2” 50 M858A 40
50 2” 50
80 2 1/2" 80

G-2160 P6033

125 125t 125t
200 200t 200t
250 250t
300 300t 300t

Use shackles with S.W.L. (Safe Working Load) equal to, or greater than, the system’s maximum capacity.

When ordering shackles, it is strongly recommended to specify max. shackle pin diameter and min. inside shackle
width to fit the load cell.

Crosby shackles

(USA)

C.M. shackles (short tons) (USA) Van Beest (The

Netherlands)

Model

tons

CF 116 13 23.04.08 n.g.

WARRANTY REPAIR POLICY

Limited Warranty On Products

Any Cooper Instruments product which, under normal operating conditions, proves defective in material or in
workmanship within one year of the date of shipment by Cooper will be repaired or replaced free of charge provided
that a return material authorization is obtained from Cooper and the defective product is sent, transportation
charges prepaid, with notice of the defect, and it is established that the product has been properly installed,
maintained, and operated within the limits of rated and normal usage. Replacement or repaired product will be
shipped F.O.B. from 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. 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 Instruments. Before returning the item, contact the

Repair Department c/o Cooper Instruments at [phone] 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. from our
plant in Warrenton, Virginia. Non-verified problems or defects may be subject to a $150 evaluation charge. Please
return the original calibration data with the unit.

Repair Warranty

All repairs of Cooper products are warranted for a period of 90 days from date of shipment. This warranty applies
only to those items that were found defective and repaired; it does not apply to products in which no defect was
found and returned as is or merely recalibrated. It may be possible for out-of-warranty products to be returned to
the exact original specifications or dimensions.

* Technical description of the defect: In order to properly repair a product, it is absolutely necessary for Cooper to

receive information specifying the reason the product is being returned. Specific test data, written observations on
the failure and the specific corrective action you require are needed.

CF 116 14 23.04.08 n.g.