Hughes weschler instruments BarGraph TriColor... User manual

BarGraph TriColor Series
Owners Manual
Manual Part Number OMTCM100
Revision 3.5, February, 2019
16900 FOLTZ PARKWAY, CLEVELAND, OHIO 44149
440/238-2550, FAX [phone] e-mail: [email protected]

Contents
1 INTRODUCTION ................................................................................................................. 1
Scope .................................................................................................................................. 1
Features ............................................................................................................................. 1
Compatibility .................................................................................................................... 1
How to Use this Manual................................................................................................... 1
2 SETUP .................................................................................................................................... 2
Options .............................................................................................................................. 2
Normal Operation ............................................................................................................ 2
Operation During Setup .................................................................................................. 3
Operator and Supervisor Setup ...................................................................................... 3
Activating Operator Setup .............................................................................................. 4
Operator Setup Actions ................................................................................................... 4
2.1 OPERATOR SETUP PROGRAMMING ........................................................................ 4
Password............................................................................................................................ 5
Alarm Setpoints ................................................................................................................ 6
LED Brightness................................................................................................................. 7
Bar Flash Enable .............................................................................................................. 7
Digital Flash Enable ......................................................................................................... 8
Lamp Test ......................................................................................................................... 8
Run..................................................................................................................................... 8
2.2 SUPERVISOR SETUP PROGRAMMING ..................................................................... 9
Activating Supervisor Setup............................................................................................ 9
Supervisor Setup Functions............................................................................................. 9
Supervisor Setup Command Summary ....................................................................... 10
Password.......................................................................................................................... 11
Alarm Setpoints .............................................................................................................. 12
Set Hysteresis ..................................................................................................................13
Set Alarm Delay.............................................................................................................. 13
BarGraph™ Zero ........................................................................................................... 14
BarGraph™ Full Scale .................................................................................................. 15
Set Bar Form................................................................................................................... 16
Set Bar Zero ....................................................................................................................17
Set Bar Full Scale ........................................................................................................... 17
Enable/Disable Operator Setup .................................................................................... 18
Enable/Disable Peak/Valley........................................................................................... 18
Set Decimal Point............................................................................................................ 19
Set Bar Fill Mode ............................................................................................................. 20
Set Bar Zone Colors ....................................................................................................... 21
Set Hi Setpoint Color ..................................................................................................... 23
Set Lo Setpoint Color ..................................................................................................... 23
LED Brightness............................................................................................................... 24
Bar Flash Enable ............................................................................................................ 24
Digital Flash Enable ....................................................................................................... 25

Configure Retransmit Signal......................................................................................... 25
Set Calibration Table ..................................................................................................... 26
Set Analog Retransmit Zero Value............................................................................... 26
Set Analog Retransmit Fullscale Value ........................................................................ 27
Set Specific Gravity Correction Factor ........................................................................ 27
Lamp Test .......................................................................................................................28
Set Update Rate .............................................................................................................. 28
Signal Source .................................................................................................................. 29
Set Buffer Size.................................................................................................................29
Set Communication ID................................................................................................... 30
Exit Supervisor Setup .................................................................................................... 30
3 CALIBRATION .................................................................................................................. 31
Calibration Methods ...................................................................................................... 31
3.1 LINEAR CALIBRATION....................................................................................... 32
Linear Calibration Procedure ....................................................................................... 32
3.2 NONLINEAR CALIBRATION .............................................................................. 34
Nonlinear Calibration Commands ............................................................................... 34
Nonlinear Calibration Procedure ................................................................................. 35
4 PHYSICAL DIMENSIONS................................................................................................ 37
4.1 BG252TC and BH252TC Physical Dimensions..................................................... 37
4.2 BG241TC Physical Dimensions .............................................................................. 37
4.3 BG261TC Physical Dimensions .............................................................................. 38
4.4 BG251TC and BG281TC Physical Dimensions..................................................... 38
4.5 Terminal Connections - BG-252TC and BH-252TC ............................................ 39
4.6 Terminal Connections - BG-241TC, BG-251TC, BG-261TC and BG-281TC ... 40
5 Configuration Flowcharts .................................................................................................. 42
Operator Setup ............................................................................................................... 42
Supervisor Setup ............................................................................................................ 43
6 WARRANTY ....................................................................................................................... 46
7 SPECIFICATIONS ............................................................................................................. 47

1
1 INTRODUCTION
Scope
This manual covers features and programming specifically for the following versions of
Weschler Instruments BarGraph™ TC (TriColor) instruments:
•BG-252TC
•BV5ATC
•PC101TC
•BW1316TC
•BG-241TC
•BG-251TC
•BG-261TC
•BG-281TC
Note: Your BarGraph™ may not contain all the options described in this manual.
Features
Weschler Instruments BG TC, TriColor BarGraph provide the quickest way to spot problems
in process control panels. Each segment in the LED Bar display can be illuminated as Red
(danger), Yellow (caution) or Green (safe). TriColor BarGraph instruments also provide these
features:
•5 digit display with resolution to 0.01%
•Alphanumeric mnemonics for setup and calibration
Compatibility
Retrofit sizes for:
•GE/Yokogawa 180
•GE/Yokogawa AB40
•Crompton 128
•Dixson SA/BB 101
•Dixson BEW51
•Weschler VX252
•Sigma/International Instruments 1151
•Weston 1316
•...and many others
How to Use this Manual
This manual provides details in these sections:
•Section 2 - Setup
•Section 3 - Calibration
•Section 4 - Mechanical dimensions, assemblies and terminal connections

2
2 SETUP
Options
Weschler BarGraph™ displays are individually configured for every purchase order. This
manual is intended as a reference for all options that may be ordered on BarGraph™ displays.
Your particular unit may not include all options listed in this manual.
Please consult the ordering guide and the part number on the BarGraph™ label for your
applicable options.
Normal Operation
The bar and digital display provide visual analog and digital indication of the process signal. If
B.FLSH and D.FLSH are enabled, when the incoming signal is below the bottom end of the bar
display, the first LED and digital display flash at a 1 Hz rate, indicating an underrange condi-
tion. When the process signal exceeds the full scale value, the top LED and digital display
flash at a 1 Hz rate, indicating an overrange condition.
If the underrange or overrange condition exceeds the displayable range, the digital display will
show UNDER or OVER.
Three pushbutton switches are located on the front of the BarGraph™: two black pushbuttons
with white triangular arrows and a red pushbutton with no markings. The pushbutton switch
with the triangular arrow pointing up ( )is the INCREASE pushbutton. The pushbutton with
the triangular arrow pointing down ( )is the DECREASE pushbutton. ENTER/SAVE is the
red pushbutton ( ).
During normal operation, the front panel pushbuttons may be used to display and reset Peak/
Valley values or reset the relays if configured for latching. Pressing the INCREASE pushbutton
() will momentarily display the captured Peak value. The captured Peak value may be reset
by pressing the INCREASE ( ) and ENTER/SAVE ( ) pushbuttons simultaneously. Pressing
the DECREASE pushbutton ( ) will momentarily display the captured Valley value. The
captured Valley value may be reset by pressing the DECREASE ( ) and ENTER/SAVE
() pushbuttons simultaneously. Latching relays may be reset by pressing the INCREASE
() and DECREASE ( ) pushbuttons simultaneously.
Digital
Display
Bar
Display
Pushbuttons
Trend
Indicators
Alarm
Indicators
AL1
AL2
AL3
AL4
Trend
Indicators
Alarm Indicators
AL1AL2AL3AL4

3
Pressing all three pushbuttons simultaneously will reset the captured Peak value,the cpatured
Valley value and reset the latching relays.
Note that the state of latching relays and the Peak/Valley values are stored electronically. If
power to the unit is interrupted the latched relay states will be lost and Peak/Valley values will
be reset.
Operation During Setup
During setup programming the bar and digital display provide information to the user for
programming. The digital display is used to show 3 to 5 character alphanumeric mnemonics
for each of the setup functions and the bar display is used to provide an analog indication of
functions and function values.
Information from the user is input through pushbuttons on the front panel.
Operator and Supervisor Setup
Setup functions are divided into two separate classes: Operator and Supervisor.
Operator Setup functions are those that may need to be changed on a routine basis for normal
operation of the instrument. These functions include changing the alarm setpoint values, LED
brightness control and Lamp Test. The ability to perform alarm setpoint programming, LED
brightness control, Bar/Digital display flashing, Peak/Valley value reset and latching relay
reset may all be disallowed by disabling Operator mode in Supervisor Setup.
Supervisor functions are those that should be setup only once when the instrument is installed
and may cause damage to equipment or faulty operation if changed inadvertently. These func-
tions include calibration settings, retransmit, ID settings, bar display modes and others.
Supervisor Setup functions may be programmed only after entry of a correct password. The
password may be changed by the user in Supervisor Setup if the current password is known.
The factory default password is 0. See notes under PASS function regarding changing the
password.
The following pages have detailed descriptions of every function in Operator and Supervisor
Setup. For quick reference, see Section 5, Configuration Flowcharts.

4
2.1 OPERATOR SETUP PROGRAMMING
Activating Operator Setup
If Operator Setup was enabled under Supervisor Setup, pressing the red ENTER/SAVE
pushbutton and holding it for more than 3 seconds activates Operator Setup.
When operator setup is first enabled, CNF is displayed on the digital display. This is the point
at which the user enters Operator Setup. RUN is the point at which the user exits Operator
Setup.
Operator Setup Actions
Operator Setup allows the following functions.
Operator Setup functions are cycled through using the INCREASE and DECREASE
pushbuttons. A particular function can be programmed by pressing the ENTER/SAVE
pushbutton. Pressing the INCREASE pushbutton while RUN is displayed will go to CNF and
pressing the DECREASE pushbutton while CNF is displayed will go to RUN.
CNF
AL1
AL2
AL3
AL4
BRIGH
B.FLSH
D.FLSH
L.TEST
RUN
Enter Operator Setup (Configure)
Enter password to access Supervisor Setup
* Adjust Alarm 1 setpoint
* Adjust Alarm 2 setpoint
* Adjust Alarm 3 setpoint
* Adjust Alarm 4 setpoint
* Set LED brightness
* Enable/Disable bar display flashing
* Enable/Disable digital display flashing
Lamp test
Leave Operator Setup (run)
Pressing ENTER/SAVE ( ) pushbutton while any of the above are displayed will display the
current setting and allow it to be modified. Each of the above functions is described on the
following pages.
* Access to these functions under Operator Setup may be disabled through the OPER func-
tion under Supervisor Setup (see Section 2.2)
Note: If no pushbuttons are pressed for approximately 30 seconds, the unit will
automatically return to run mode.
PASS

5
PASS Password
(Enter Supervisor Setup)
Supervisor Setup allows access to BarGraph parameters that should not be changed routinely
and may even lead to dangerous situations if inadvertently changed. For this reason, entry into
the Supervisor Setup mode is protected by a password.
The display will show 0 (zero), prompting the user to enter the correct pass-
word.
INCREASE and DECREASE pushbuttons can be used to enter the password.
Hold it until the value is reached. The longer the pushbutton is held, the faster
the display moves to the required number.
The password can be any numeric value between _9999 and 99999. It
can only be set under Supervisor Setup mode. Entering the correct password
under Operator Setup will allow entry into Supervisor Setup.
Press
ENTER/SAVE
Pressing the ENTER/SAVE pushbutton once the correct password number is
displayed will allow entry to Supervisor Setup. If the correct password was not
displayed, the display will continue on to the next available setting and will
not enter Supervisor Setup.
Notes: As shipped from the factory, the password is set to 0. This allows the user
to enter Supervisor Setup and change the password. It is recommended
that the password be changed to something other than 0.
Remember your password! If you have trouble remembering the pass-
word, write it down. If there is no record of the password and access to
Supervisor Setup is required, please contact the factory at [phone].
Press
ENTER/SAVE
Press
INCREASE
DECREASE

6
AL1 Alarm Setpoints AL2
AL3 AL4
Up to four alarm setpoints are provided, depending on the options ordered.
In Operator Setup these setpoint values may be examined and changed only if Operator Setup
was enabled under Supervisor Setup (see Enable/Disable Operator Setup). The type of setpoint
(HI or LO) and state of the relay contact ( STD or FSAFE) may be examined but can only
be changed in Supervisor Setup.
Press
ENTER/SAVE
The display will show HI or LO to indicate whether the alarm was config-
ured as a high setpoint or low setpoint in Supervisor Setup. HI indicates
alarming when the signal is greater than the setpoint value. LO indicates
alarming when the signal is less than the setpoint value. This cannot be changed
in Operator Setup.
Press
ENTER/SAVE
Alarm relay state is displayed: either STD (standard) or FSAFE (failsafe).
Standard outputs use a non-energized relay coil, i.e. the relay coil is energized
to indicate an alarm condition. Failsafe outputs use an energized relay coil, i.e.
the relay coil must be de-energized to indicate an alarm condition. This cannot
be changed in Operator Setup.
Press
ENTER/SAVE
Setpoint value for this alarm is displayed. The bar and digital displays both
indicate value of the setpoint.
Press
INCREASE
DECREASE
INCREASE and DECREASE pushbuttons can be used to change the setpoint
value. Hold it until the new setpoint value is reached.
The longer the pushbutton is held, the faster the display moves to the required
setpoint value.
Press
ENTER/SAVE
To save the new setpoint value, press the ENTER/SAVE pushbutton.
Do not assume that the new value is saved once you have arrived
at the new setpoint value and the BarGraph™defaults to normal
display mode. You must press ENTER/SAVE to store the new
setpoint value and make it effective.
Notes: In Operator Setup mode, only the bar and digital displays are affected. All
signal processing functions continue to operate at the current setup val-
ues. Thus, if you are using setpoint relays or retransmit capabilities, they
continue to function as if the BarGraph™was in the normal display mode.

7
BRIGH LED Brightness
B.FLSH Bar Flash Enable
LED brightness can be controlled from Operator Setup. Sixteen settings are available: 1 to
16. 1 is the dimmest setting while 16 is the brightest. The factory default setting is 12.
Press
ENTER/SAVE
Press
INCREASE
DECREASE
Press
ENTER/SAVE
The display will show the current LED brightness setting.
Pressing INCREASE or DECREASE will increment or decrement the LED
brightness setting one step. The display brightness will change to show the
effect of the new setting.
To save the new LED brightness, press the ENTER/SAVE pushbutton.
Do not assume that the new setting is saved once you have cho-
sen it and the BarGraph™defaults to normal display mode. You
must press ENTER/SAVE to store the new LED brightness setting
and make it effective.
During an overrange/underrange condition, the Bar Display may be set to flash. This function
is used to enable or disable the flashing of the Bar Display.
Press
ENTER/SAVE
Press
INCREASE
DECREASE
Press
ENTER/SAVE
The display will show OM or 0FF to indicate the current state.
Pressing INCREASE sets flashing OM, pressing DECREASE sets flashing
0FF.
To save the new Bar Flash Enable setting, press the ENTER/SAVE pushbutton.
Do not assume that the new setting is saved once you have cho-
sen it and the BarGraph™defaults to normal display mode. You
must press ENTER/SAVE to store the new setting and make it ef-
fective.

8
D.FLSH Digital Flash Enable
During an overrange/underrange condition, the Digital Display may be set to flash. This func-
tion is used to enable or disable the flashing of the Digital Display.
Press
ENTER/SAVE
Press
INCREASE
DECREASE
Press
ENTER/SAVE
The display will show OM or 0FF to indicate the current state.
Pressing INCREASE sets flashing OM, pressing DECREASE sets flashing
0FF.
To save the new Digital Flash Enable setting, press the ENTER/SAVE
pushbutton.
Do not assume that the new setting is saved once you have cho-
sen it and the BarGraph™defaults to normal display mode. You
must press ENTER/SAVE to store the new setting and make it ef-
fective.
L.TEST Lamp Test
Press
ENTER/SAVE
Press and hold ENTER/SAVE. All segments of the bar display be lit and the
digital display will be lit as long as ENTER/SAVE is held.
All segments of the bar display should be illuminated yellow and the digital
display should show 8.8.8.8.8. If any segment of the bar display is illumi-
nated red or green, this indicates a failure. If any segment or decimal point of
the digital display is not illuminated, this indicates a failure. Consult the fac-
tory for replacement.
RUN Run
Press
ENTER/SAVE
The BarGraph will leave Operator Setup mode and resume normal operation.
This is the point at which you exit Operator Setup.

9
2.2 SUPERVISOR SETUP PROGRAMMING
Activating Supervisor Setup
Supervisor Setup can only be activated by entering the correct password (see page 5).
After the password is accepted, AL1 is displayed on the digital display*. This is the point at
which the user enters Supervisor Setup. To leave Supervisor Setup, scroll to
RUN and press the
ENTER/SAVE pushbutton or wait for time-out.
Supervisor Setup Functions
A summary of all Supervisor Setup functions is listed on the next page. Weschler BarGraph™
displays are custom built for every purchase order. Your particular unit may not include all
functions listed on the next page depending on which options were ordered.
Supervisor Setup functions are cycled through using the INCREASE and DECREASE
pushbuttons. A particular function can be set by pressing the ENTER/SAVE pushbutton. Press-
ing the INCREASE pushbutton while RUN is displayed will go to CNF and pressing the
DECREASE pushbutton while CNF is displayed will go to RUN.
Next
Function
Previous
Function Set
Function
* AL1 will also be displayed if an incorrect password is entered, but the unit will remain in
Operator Setup mode.
Note: If no pushbuttons are pressed for approximately 30 seconds, the unit will
automatically return to run mode.

10
Supervisor Setup Command Summary
CNF
PASS
AL1
AL2
AL3
AL4
HYS
DELAY
ZERO
FULL
BAR
B.ZERO
B.FULL
OPER
PEA
DEC
B.FILL
B.COL
HI.COL
LO.COL
BRIGH
B.FLSH
D.FLSH
RET
TABLE
A.ZERO
A.FULL
S.GRAV
L.TEST
U.RATE
SGNAL
B.SIZE
ID
RUN
Entry (Configuration)
Alarm 1
Alarm 2
Alarm 3
Alarm 4
Hysteresis
Alarm Delay
Calibrate Zero
Calibrate Fullscale
Barform
Bar Zero
Bar Fullscale
Operator Setup Enable/Disable
Peak/Valley Enable/Disable
Decimal Point Position
Bar Display Fill Mode
Bar Zone Color
High Setpoint Color
Low Setpoint Color
LED Brightness
Bar Flash Enable/Disable
Digital Flash Enable/Disable
Retransmit Signal
Calibration Table
(nonlinear calibration)
Analog Retransmit Zero
Analog Retransmit Fullscale
Specific Gravity Correction
Lamp Test
Update Rate
Signal Source (analog/digital)
Buffer Size
Communication ID
Exit Setup (run)
Password
Note: Depending on the options ordered, your BarGraph may not show all the
functions listed above.

11
PASS Password
(changing)
Supervisor Setup allows access to BarGraph parameters that should not be changed routinely
and may even lead to dangerous situations if inadvertently changed. For this reason, entry into
the Supervisor Setup mode is protected by a password. After entry into Supervisor Setup, you
may change the password as follows:
The display will show the current password.
INCREASE and DECREASE pushbuttons can be used to select a new pass-
word. Hold it until the new password value is reached. The longer the pushbutton
is held, the faster the display moves.
The password can be any numeric value between _9999 and 99999.
Press
ENTER/SAVE
Press the ENTER/SAVE pushbutton to save the new password.
Notes: As shipped from the factory, the password is set to 0. This allows the user
to enter Supervisor Setup and change the password. It is recommended
that the password be changed to something other than 0.
Remember your password! If you have trouble remembering the pass-
word, write it down. If there is no record of the password and access to
Supervisor Setup is required, please contact the factory at [phone].
Press
ENTER/SAVE
Press
INCREASE
DECREASE

12
AL1 Alarm Setpoints AL2
AL3 AL4
Up to four alarm setpoints are provided, depending on the options ordered. Each of these
setpoints may be programmed as a high or low setpoint and for standard or failsafe relay
operation in Supervisor Setup.
Press
ENTER/SAVE
The display will show HI or LO to indicate whether the alarm was config-
ured as a high setpoint or low setpoint
Press
ENTER/SAVE
To save the new value, press the ENTER/SAVE pushbutton. Alarm output
type is displayed: either STD (standard) or FSAFE (failsafe).
Press
ENTER/SAVE
To save the new alarm output type, press the ENTER/SAVE pushbutton. The
current alarm setpoint value will be displayed.
Press
INCREASE
DECREASE
INCREASE and DECREASE pushbuttons can be used to change the setpoint
value. Hold it until the new setpoint value is reached.
The longer the pushbutton is held, the faster the display moves to the required
setpoint value.
Press
ENTER/SAVE
To save the new setpoint value, press the ENTER/SAVE pushbutton.
Press
INCREASE
DECREASE
INCREASE or DECREASE pushbutton can now be used to set the alarm HI
or L0 respectively. HI indicates alarming when the signal is greater than the
setpoint value. L0 indicates alarming when the signal is less than the setpoint
value.
Press
INCREASE
DECREASE
INCREASE or DECREASE pushbutton can be used to change the alarm out-
put type to standard or failsafe, respectively. Standard outputs use a non-ener-
gized relay coil, i.e. the relay coil is energized to indicate an alarm condition.
Failsafe outputs use an energized relay coil, i.e. the relay coil must be de-
energized to indicate an alarm condition.

13
HYS Set Hysteresis
DELAY Set Alarm Delay
Hysteresis may be set in 0.01% increments from 0 to 10% of Full Scale. Attempting to incre-
ment past 10% will enable latching for all alarms.
Press
ENTER/SAVE
Press
INCREASE
DECREASE
Press
ENTER/SAVE
The display will show the current hysteresis setting.
Pressing the INCREASE or DECREASE pushbutton will increase or decrease
the hysteresis setting. Hold it until the desired value is reached. The longer the
pushbutton is held, the faster the display moves to the required setting.
Incrementing past 10% will enable latching on the alarms and display LCH.
Press ENTER/SAVE to store the new setting.
The delay before alarms are activated may be set from 0 to 10000 milliseconds (0 to 10 sec-
onds) in 100 millisecond (0.100 second) steps. This provides some filtering for momentary
conditions that may exceed alarm values, but are not valid alarm conditions.
Note: This delay is in addition to the normal response time and Update Rate.
Press
ENTER/SAVE
Press
INCREASE
DECREASE
Press
ENTER/SAVE
The display will show the current delay setting.
INCREASE and DECREASE pushbuttons can be used to change the delay
setting. Hold it until the new delay value is reached. Setting will show
.000 to
10.000 seconds.
The longer the pushbutton is held, the faster the display moves to the required
value.
Press ENTER/SAVE to store the new setting.
Note: Relay latching is performed electronically. The latch state will be lost and
reset if power is interrupted.

14
ZERO BarGraph Zero
This is a calibration function. This function and BarGraph FullScale function are used to
calibrate for linear process measurement. They affect the value displayed on the digital display
of the BarGraph. For nonlinear process measurement, use the Table function. See Section 3,
Calibration, for details.
There are two methods for linear calibration: CAL and MOCAL.
CAL requires the use of a calibrated laboratory standard to generate the desired 0 input for
calibration. See Section 3, Calibration for a detailed Calibration Procedure using a laboratory
standard.
MOCAL does not require a calibrated laboratory standard. Instead, the value of the input
signal that corresponds to the zero point may be entered directly using the front panel pushbuttons
and digital display. Note that this does not recalibrate the BarGraph: it merely defines what the
number that corresponds to zero-scale input will be for the existing calibration.
Press
ENTER/SAVE
Press
INCREASE
DECREASE
The display will show the saved state, CAL or MOCAL.
The display will toggle between CAL and MOCAL.
CAL indicates that the user will use a laboratory standard to recalibrate
the zero point (see Section 3 for the complete Calibration Procedure).
MOCAL indicates that the user will not use a laboratory standard, but will
instead enter the input value corresponding to the zero point directly using the
front panel pushbuttons and digital display.
The rest of this description applies only to M0CAL:
Press
ENTER/SAVE
Press
INCREASE
DECREASE
Press
ENTER/SAVE
The display will show the current zero point input value.
INCREASE and DECREASE pushbuttons can be used to change the zero point
input value. Hold until the new zero point input value is reached.
The longer the pushbutton is held, the faster the display moves to the required
value.
Press ENTER/SAVE to store the new setting.

15
FULL BarGraph Full Scale
This is a calibration function. This function and BarGraph Zero function are used to calibrate
for linear process measurement. They affect the value displayed on the digital display of the
BarGraph. For nonlinear process measurement, use the Table function. See Section 3, Calibra-
tion, for details.
There are two methods for linear calibration: CAL and MOCAL.
CAL requires the use of a calibrated laboratory standard to generate the desired fullscale input
for calibration. See Section 3, Calibration, for a detailed Calibration Procedure using a labora-
tory standard.
MOCAL does not require a calibrated laboratory standard. Instead, the value of the input
signal that corresponds to the fullscale point may be entered directly using the front panel
pushbuttons and digital display. Note that this does not recalibrate the BarGraph: it merely
defines what the number that corresponds to fullscale input will be for the existing calibration.
Press
ENTER/SAVE
Press
INCREASE
DECREASE
The display will show the saved state, CAL or MOCAL.
The display will toggle between CAL and MOCAL.
CAL indicates that the user will use a laboratory standard to recalibrate
the fullscale point (see Section 3 for the complete Calibration Procedure).
MOCAL indicates that the user will not use a laboratory standard, but will
instead enter the input value corresponding to the fullscale point directly using
the front panel pushbuttons and digital display.
The rest of this description applies only to M0CAL:
Press
ENTER/SAVE
Press
INCREASE
DECREASE
Press
ENTER/SAVE
The display will show the current fullscale point input value.
INCREASE and DECREASE pushbuttons can be used to change the zero point
input value. Hold until the new fullscale point input value is reached.
The longer the pushbutton is held, the faster the display moves to the required
value.
Press ENTER/SAVE to store the new setting.

16
BAR Set Bar Form
This function allows the user to set the bar display format. The most common display format
is bottom zero, i.e.; starts at the bottom (or most left for horizontal displays) and increasing up
(towards the right for horizontal displays). The BarGraph™ zero point can be located or refer-
enced anywhere on or off the scale in this setup.
Press
ENTER/SAVE
Press
INCREASE
DECREASE
The display will show the current barform. Options for barform and the order
they appear in are shown below.
Pressing the INCREASE or DECREASE pushbutton will cycle through the
barform options shown below.
Bottom 0 - BarGraph™ reads 0% of Full Scale at the bottom and
increasing up to 100% of Full Scale at the top.
Center 0 - Zero point at 50% of bar display. BarGraph™ reads -
50% of Full Scale at the bottom and increases up to +50% at the
top.
Top 0 - Zero point at 100% of bar display. This effectively re-
verses the bar display, with -100% of Full Scale at the bottom of
bar display and 0% of Full Scale at the top.
Variable - allows the user to set any arbitrary values for the bot-
tom and top of bar display (see Set Bar Zero and Set Bar Full
Scale).
Deviation - allows the user to set any arbitrary values for the bot-
tom and top of bar display (see Set Bar Zero and Set Bar Full
Scale). The center of the bar display is set at 1/2(B.ZERO +
B.FULL) and shows + or - variations around the center point.
0
100
VAR
DEV
50
Press
ENTER/SAVE
Press ENTER/SAVE to store the new setting.

17
B.ZERO Set Bar Zero
B.FULL Set Bar Full Scale
This function will not be enabled or displayed unless barform has been set to Deviation
or Variable barform (see Barform function). The BarGraph™ zero display point may be set
to a certain display value. This is not a calibration function. It only affects the range of values
that the bar display will show. This function can be used to limit the lowest value that the
BarGraph™ will display. See Example at bottom of page.
Press
ENTER/SAVE
Press
INCREASE
DECREASE
Press
ENTER/SAVE
The display will show the current BarGraph™ zero display point.
Pressing the INCREASE or DECREASE pushbutton will increase or decrease
the zero display point.
Press ENTER/SAVE to store the new setting.
This function will not be enabled or displayed unless barform has been set to Deviation
or Variable barform (see Barform function). The BarGraph™ Full Scale display point may
be set to a display value. This is not a calibration command. It only affects the bar display. This
command and the Set Bar Zero function may be used to limit the values shown on the bar
display to a specific region of interest. See Example at bottom of page.
Press
ENTER/SAVE
Press
INCREASE
DECREASE
Press
ENTER/SAVE
The display will show the current BarGraph™ Full Scale display value.
Pressing the INCREASE or DECREASE pushbutton will increase or decrease
the Full Scale display value.
Press ENTER/SAVE to store the new setting.
Example: If the BarGraph is monitoring a process that runs from 0 to 120, but the process
never falls below 110 or rises above 115, displaying from 0 to 120 on the bar
display will force the operating region to the last 1/12 of the bar display. Set-
ting B.ZERO to 110 and B.FULL to 115 will force the entire bar to display only
the region of interest.