Crompton 264 Series Manual

Smart Tricolor or mono-color digital bargraph with a Universal Header Selectable

UNIVERSAL PROCESS INPUT

**: Custom Input
1: 0 ~ 1mA

2: 4 ~ 20mA

3: 0 ~ 1V
4: 1 ~ 5V
5: 0 ~ 5V

ANALOG OUTPUT

_: Custom Output
_: 0 ~ 10V

_: 4 ~ 20mA

_: 0 ~ 20mA

RELAYS
DTV: No Relays

DTT: Two 10A Form C Relays
DTF: Two 10A Form C Relays
and Two 5A Form A Relays

POWER SUPPLY
A: 85 ~ 264V AC
110 ~ 370V DC

B: 19 ~ 36V AC/DC

COLOR
RD: Red Bargraph

GN: Green Bargraph
YL: Yellow Bargraph
: Tricolor Bargraph

DISPLAY
VS: Vertical

HS: Horizontal

Input, an optional isolated analog output and up to four fully programmable set

points, for monitoring, measurement, and control applications.

General Features

• A Tricolor or mono color (red or green), 101 segment high
brightness bargraph. Optional vertical or horizontal format.

• Red 4-digit LED display with range between –1999 to
9999 (12000 counts). Optional green digital display.

• Front panel LED annunciators provide indication of set­point status.

• Two 10 Amp Form C, and two 5 Amp Form A relays available.

•

Auto-sensing AC/DC power supply. For voltages between
85-264 V AC / 110-370 V DC (Z) or 18-48 / 18-72 V AC / DC (Y).

• Optional isolated 16 bit analog output. User or factory
scalable to 4 to 20 mA, 0 to 20 mA or 0 to 10 V across
any desired digital span from ± one count to the full scale
range of – 1999 to 9999 (12000 counts).

• Optional NEMA-4 front cover.

•

Automatic averaging (16 sample moving average with eight
count replacement window to speed up display response).

• 24 V DC excitation is available to power external 4/20 mA
transmitters.

Software Features

• The bargraph can display,

full scale, any desired por­tion of the digital reading.

•

Bargraph center zero func­tion.

•

Four programmable set­points.

• Setpoint 1 has delay-on-

make and delay-on-break
plus a special “pump on
pump off” mode that cre-

ates a Hysteresis Band
between SP1 and SP2.

• Relay activation can be
selected to occur above
(hi) or below (Lo) each set­point.

• Digital display blanking.

• Decimal point setting.

• Four-level brightness con­trol of the bargraph and
digital display.

264 SERIES

of

101 Segment Bargraphs

with Digital Display

Specifications

Input Specs: ..............Depends on

A/D Converter:...........14 bit single slope

Accuracy: ...................±(0.05% of reading + 2 counts)

Temp. Coeff.: .............100 ppm/°C (Typical)

Warm up time: ...........2 minutes

Conversion Rate: ......10 conversions per second (Typical)

Digital Display: ..........

Bargraph Display: .....

Polarity: ......................Assumed positive. Displays – negative

Decimal Selection: ....Front panel button selectable, X•X•X•X•

Positive Overrange: ..Bargraph and top segments of digital

Negative Overrange: .First segment of bargraph and bottom

Relay Output: ............Two 5 Amp Form A relays and Two

Analog Output: ..........Isolated 16 bit user scalable mA or V

1: (volts out) ............. 0-10 V DC @ 500 Ω or higher resistance

2: (mA out) ..............

Power Supply: ...........AC/DC Auto sensing wide range supply

Y ..............................

Z (std) .....................

Operating Temp.: .......0 to 60°C

Storage Temp: ...........–20°C to 70°C

Relative Humidity: ....95% (non condensing)

Case Dimensions: .....

Weight: .......................9.5 oz., 12 oz when packed

4 digit 0.31" LED red (std), green (optn)

Range
101 segment 4” red vertical (std),
green or tricolor (optn), horizontal (optn)

display flash.

segments of digital display flash.

10 Amp Form C relays.

4-20 mA @ 0 to 500Ω max loop resistance

18-48 VAC / 18-72 VDC @ 2.5W max 4.2W

85-265 VAC / 95-370 VDC @ 2.5W max 4.2W

3/32 DIN (Bezel 36Wx144Hmm)
Depth behind bezel 135 mm (5.32")
Plus 16 mm (0.63”) for connectors

range and function selected

–1999 to 9999 counts.

Ordering

Code

Crompton • www.crompton-instruments.comMay 27, 2005 Crompton Bar Digital DS (NK2) Page 1

Controls and Indicators

0

10

30

50

70

20

40

60

80

4

3

2

1

P

SP

101 Segment

Bargraph

Optional Program

Lockout Switch

(located behind

faceplate)

Relay Activation LED (SP4)

Relay Activation LED (SP3)

Relay Activation LED (SP2)

Relay Activation LED (SP1)

UP Button

PROGRAM
Button

DOWN
Button

4 Digit LED
Display

Setpoint

indicated

by an OFF

Segment

Setpoint

indicated

by an ON

Segment

To remove setpoint

indication, set to a

value below bLo

P

[Span]

[10000]

P

P

[LLLL]

[LhLh]

[hLhL]

Front Panel Buttons

Program Button

The P button is used to move from one program step to the next.

When pressed at the same time as the button, it initiates the
calibration mode. When pressed at the same time as the
button, it initiates the setpoint setting mode.

Up Button

When in the operational display, pressing the button allows you
to view the setting of setpoint 1.

When setting a displayed parameter during programming, the

button is used to increase the value of the displayed parameter.

Down Button

When in the operational display, pressing the button allows you
to view the setting of setpoint 2.

When setting a displayed parameter during programming, the

button is used to decrease the value of the displayed parameter.

Front Panel LED Display

Relay Activation

The Relay Activation LEDs indicate the alarm status. They are
labeled from bottom to top: SP1, SP2, SP3, SP4.

Digital LED Displays

The digital LED displays are used to display the meter input
signal readings. They also display the programming settings
during programming.

Setpoint Indication

The position of setpoints on the bargraph display are indicated by
an ON or OFF segment depending on whether the bargraph display
is below or above the setpoint.

Programming Conventions

To explain software programming procedures, logic diagrams are
used to visually assist in following the programming steps. The
following symbols are used throughout the logic diagrams to
represent the buttons and indicators on the meter:

This symbol represents the
OPERATIONAL DISPLAY.

This is the PROGRAM button.

This is the UP button.

This is the DOWN button.

When a button is shown, press and release
it to go onto the next step in the direction
indicated by the arrow. When an alterna­tive dotted line is shown, this indicates that
an alternative logic branch will be followed
when a particular option is present.

When two buttons are shown side by
side and enclosed by a dotted line, they
must be pressed at the same time then
released to go onto the next programming
step.

If an X appears through a digit, it means
that any number displayed in that digit is not
relevant to the function being explained.

Crompton • www.crompton-instruments.comPage 2 May 27, 2005 Crompton Bar Digital DS (NK2)

When the

and

buttons are shown
together, the display value can be increased
by pressing and releasing the

button

or decreased by pressing and releasing the

button.

When the

and

buttons are shown
with two displays, either display can be
selected by pressing and releasing the

buttons.

or

When two displays are shown together
with bursts, this indicates that the display is
toggling (flashing) between the name of the
function and the value.

Text or numbers shown between square
brackets in a procedure indicate the pro­gramming code name of the function or the
value displayed on the meter display.

When there are more than two display selec­tions they are shown in brackets below the
first display and are also selectable by press­ing and releasing the

or

buttons.

A dotted line enclosing an entire logic dia­gram indicates that programming branch
will appear only when a particular option is
present.

Operational Display

MAIN MENU

SETPOINT

VIEW ONLY MODE

SETPOINT

VIEW ONLY MODE

Set points cannot

be changed

in the SETPOINT

VIEW ONLY MODE.

Example

Bargraph Center Point
Display Selection (cto)

This branch will
only appear if
the analog
output option
is installed

Digital Display ON/OFF
Selection (diSP)

Sub-menu MODE

Calibration Mode

Calibration
Input

Calibration
Output

Calibrate Analog
Output Lo

Calibrate Analog
Output Hi

Select the Digital

Reading at which
the Analog Output
Hi (chi) will occur

Select the Digital
Reading at which
the Analog Output
Lo (cLo) will occur

This branch will only appear

if the analog output option

is installed

DIGITAL SPAN SELECTION

FOR ANALOG RANGE OUTPUT

See Page 6

DIGITAL DISPLAY ON/OFF

See Page 6

BARGRAPH CENTER POINT
DISPLAY MODE SELECTION

See Page 6

TWO POINT ANALOG OUTPUT

RANGE SETTING AND CALIBRATION

See Page 7

Set the Decimal
Point (dp)

Bargraph Display
Scale Lo Range
Setting (bLo)

Bargraph Display
Scale hi Range
Setting (bhi)

Display
Brightness (br)
1 Dimmest
2 Dim
3 Bright
4 Brightest

[X•XXX]
[XX•XX]
[XXX•X]
[XXXX•]

[XXXX]

DECIMAL POINT AND

BRIGHTNESS SELECTION

See Page 5

DIGITAL SPAN SELECTION
FOR BARGRAPH DISPLAY

See Page 5

Select the

desired

reading for

the applied

Lo input signal

Select the

desired

reading for

the applied

hi input signal

Any new settings
are canceled and
previous settings
are retained

Err. Indicates
unsuccessfull
calibration

Goes directly
to Zero setting
if Analog Output
is not installed

TWO POINT DIGITAL
CALIBRATION MODE

See Page 4

[orAn]

[rEd]

NOTE: Will only

appear if a tricolor
display is installed

[orAn]

[rEd]

[orAn]

[rEd]

[orAn]

[rEd]

[orAn]

[rEd]

BARGRAPH COLOR

PROGRAMMING MODE

See Page 9

SETPOINT SETTING AND

RELAY CONFIGURATION MODE

See Page 8

[LhLh]
[hLhL]
[hhhh]

Set Setpoint 1 (SP1)

Delay-on-Make (doM)

Delay-on-Break (dob)

0 to 9999 seconds

Relays Activation [rLYS]
(H) High the relay

energizes when the
setpoint is exceeded
(L) Low the relay
energizes below the
setpoint.

Setpoints Indication

is from left to right
SP1, SP2, SP3, SP4

Hysteresis [hYSt]

When hYSt is selected ON, and SP2 is
set at a value higher than SP1, the SP1
relay will operate in a special "pump on
pump off" Hysteresis mode. SP2 acts as
the upper limit and SP1 acts as the lower
limit of the Hysteresis Band.
For filling applications, rLYS should be set
to LhLh. SP1 will then activate for inputs
less than the SP1 setpoint, and remain ON
until the SP2 setpoint is reached.
For emptying applications, rLYS should
be set to hhhh. SP1 will then activate for
inputs greater than the SP2 setpoint, and
remain ON until the SP1 setpoint is reached.

Tricolor Bargraph

The tri-color bargraph is designed
like a traffic light, to display either
red, orange or green, but only one
color at a time. The color to be
displayed is selected in two ways.

The first step is to select the color
to be displayed when the bar is
“below” whichever set point is set
to the lowest position.

The second step is to select the
color to be displayed when the bar
is above each specific setpoint,
regardless of the order or position
to which the set points are set.

However, if two or more setpoints
with differently specified colors are
positioned at the same set point
value, the color specified for the
set point with the highest
identifying number will be
displayed. When setpoints are set
to the same value, the SP4 color
overrides the SP3 color, the SP3
color overrides the SP2 color, and
the SP2 color overrides the SP1
color.

Setpoint 2 (SP2)

Setpoint 3 (SP3)

NOTE: [dom] [dob]
Functions are only
available for SP1

0 to 9999 seconds

Setpoint 4 (SP4)

+

–

4.00

+

–

20.00

Software Logic Tree

These are intelligent meters with a hierarchical software struc­ture designed for easy programming and operation, as shown
below in the software logic tree.

Software Version is Displayed on Power-up

When power is applied, all segments of the bargraph and digi­tal display light up for 3 seconds. The version number of the
installed software is then displayed for 2 seconds, after which,
the operational display indicates the input signal.

15 Second Program Timeout

Except for ZERO and SPAN settings in the Two Point Digital
Calibration Mode and the Analog Output Range Setting and
Calibration Mode (cLo and chi), the meter has a 15 second
program timeout. If no buttons are pressed for 15 seconds in
any of the other programming sequences, the meter will exit the
programming mode and return to the operational display. Any
program changes that were made prior to pressing the P but­ton in the preceding step will not be saved.

Crompton • www.crompton-instruments.comMay 27, 2005 Crompton Bar Digital DS (NK2) Page 3

Two Point Digital Calibration Mode

MAIN MENU

Operational Display

Sub-menu
MODE

STEP A Calibration

Mode

STEP B Calibration

Mode

STEP C Zero

STEP D Span

Err. Any new setting
canceled and previous
settings are retained

To Digital Span Selection for

Bargraph Display Page 5

cAL out/iP branch will only
appear if the analog output
option is installed, otherwise
cAL on goes directly to ZEro
setting

TWO POINT DIGITAL
CALIBRATION MODE

To Digital Span Selection

for Bargraph Display

See Page 6

To Two Point Analog

Output Range Setting

and Calibration

See Page 7

This mode enables the meter to be calibrated by applying a zero or low input signal, entering the desired reading for that signal, then
applying a high input signal, and then entering the desired reading for that signal. The meter then automatically calculates and pro­grams in the requisite scale factor, within the following parameters.

1. Positive and negative signals may be applied, but the difference between the low and the high signal inputs must be at least 1000
counts or Err will be indicated.

2. Positive and Negative values for the desired reading can be entered, but the scale factor created can not exceed the Digital Display
Span capability of the meter which is 12,000 counts between –1999 to 9999.

3. The internal Signal Span is limited to 3 V DC between – 1 V DC to + 2 V DC. Any outputs from an Input Signal Conditioning module
that exceed these limits will cause the meter to indicate overrange regardless
of the Digital Display Span scaled.

Note: Many input signal conditioners have provisions for analog calibration and
scaling. If the meter is digitally set to read zero with a zero input (shorted input),
and to read 1000 with a 1.000 V input, any pre-calibrated analog signal con­ditioner, with an output that does not exceed – 1 V to + 2 V, will read correctly
without any further calibration when it is inserted in the meter.

STEP A Enter the Calibration Mode

1)

2) Press the or button. Display changes from [oFF] to [on].

3)

Press the P and buttons at the same time. Display toggles

between [CAL] and [oFF].

Press the P button. Display toggles between [CAL] and [out].

Note: If at this point, the display skips directly to STEP C and toggles between
[SPAn] and the previous [SPan] setting, the software is detecting that the
optional analog output hardware is NOT installed.

STEP B

2) Press the P button. Display toggles between [ZEro] and the previ-

Select Two Point Digital Calibration of Input Signal

1) Press the or button to select CAL [iP] for input signal calibration.

ous zero setting.

STEP C Set the Meter’s Low Input Signal Reading on the Digital Display

1) Apply a zero or low signal to the meter. (Positive or negative val-

2) Using the and buttons, adjust the meter display to the desired

3) Press the P button. Display toggles between [SPAn] and the pre-

ues are allowed).

reading for the applied low input signal.

vious span setting.

STEP D Set the Meter’s High Input Signal Reading on the Digital Display

1) Apply a high input signal to the meter.

2) Using the and buttons, adjust the digital display to the
desired reading for the applied high input signal.

3) Press the P button.

The Digital Calibration Procedure is now complete.
If the digital calibration was successfully completed, the menu branches

to the Digital Span Selection for Bargraph Display (see page 5), and the
display flashes [bhi] and the previous setting.

ERROR Indicates Unsuccessful Calibration

If the calibration was unsuccessful, the display indicates [Err], the new

calibration settings just entered will not take effect and the previously
stored setting will remain.

The three most likely causes of an error during

calibration are:

1.

The full scale and zero signals were too similar. The full scale signal must be
at least 1000 counts greater than the zero or low input signal (positive and
negative values are allowed).

2. The scaling requirement exceeded the digital display span capability
of the meter (12,000 counts between –1999 to 9999).

3. No input signal present, or incorrect input signal connections.

Crompton • www.crompton-instruments.comPage 4 May 27, 2005 Crompton Bar Digital DS (NK2)

Example

Example

From Two Point
Digital Calibration
Mode See Page 4

STEP A

STEP B

STEP C

STEP D

See Example Above
of Bargraph Display

Scale Range

To Digital Span Selection

for Analog Range Output or

Bargraph Center Point

Display Mode Selection

on Page 6

DIGITAL SPAN SELECTION

FOR BARGRAPH DISPLAY

[X•XXX]
[XX•XX]
[XXX•X]
[XXXX•]

[XXXX]

DECIMAL POINT AND

BRIGHTNESS SELECTION

Digital Span Selection For Bargraph Display

No bargraph

display

Digital display Digital display

%

100

0

10

30

50

70

90

20

40

60

80

4

3

2

1

P

SP

Bargraph display

ends at

6000 counts

Bargraph display

starts at

4000 counts

At 5000 counts

the bargraph display

will be at midpoint

%

100

0

10

30

50

70

90

20

40

60

80

4

3

2

1

P

SP

The bargraph can be set to display full scale (0-101 bars) any portion

of the digital reading from a minimum of 100 counts to a maximum of

12,000 counts. This provides higher resolution bargraph indication for

those applications where the normal operating input signal range is less

than the desired full scale display range of the digital display.

For Example:

If the full scale range of the meter has been set from -1999 to

9999 (0-12,000 counts), but the normal operating range of the

input signal is between 4000 & 6000. The bargraph high param-

eter [bhi] can be set to 6000 and the bargraph low parameter [bLo]

can be set to 4000.

This means that although the meter could digitally display a signal

from -1999 to 9999 (0-12,000 counts), the bargraph display only

begins to function at a reading of 4000, and reaches full scale

indication at a reading of 6000. Although the digital display will

continue reading up to 9999 before indicating overrange, the bar-

graph display will indicate its overrange by flashing for readings

above 6000.

Example of Setting the Digital Span of the Bargraph Display

to be Different than the Digital Display Range

Bargraph does not light up for

Input Signals up to 3999 counts

Bargraph lights up for Input
Signals above 4000 counts

STEP A Enter the Calibration Sub Menu Mode

1) Press the P and buttons at the same time. Display toggles

2) Press the P button. Display toggles between [bhi] and the

between [CAL] and [oFF].

previous setting.

STEP B Set the Digital Span of the Bargraph Display

above)

1) Using the and buttons, adjust the display to the desired
high parameter reading, e.g. 6000 counts.

previous setting.

low parameter reading, e.g. 4000 counts.

2) Press the P button. Display toggles between [bLo] and the

3) Using the and buttons, adjust the display to the desired

4) Press the P button. Display changes from [4000] to [dP].

Decimal Point and Brightness Selection

STEP C Set the Decimal Point

1) Using the and buttons, adjust the display to the desired

2) Press the P button. Display toggles between [br] and the

STEP D Set the Bargraph and Digital Display Brightness

1) Using the and buttons, adjust the display to the desired

2) Press the P button. Display toggles between [Anhi] and the

Note: If at this point, the display skips directly to STEP G and toggles
between [Cto] and [oFF], the software is detecting that the optional analog
output hardware is NOT installed.

decimal point setting.

previous brightness setting.

brightness setting (4 is the brightest setting).

previous [Anhi] setting.

(See example

Crompton • www.crompton-instruments.comMay 27, 2005 Crompton Bar Digital DS (NK2) Page 5

5000

Center

Point

Single

Bar Lit

0

2500

5000

Center

Point

0

2500

4000

As signal
increases

0

5000

Center

Point

2500

1000

As signal

decreases

+ 1 V

Center

Point
Single
Bar Lit

- 1 V

0 V

+ 1 V

Center

Point

- 1 V

0 V

0.800

As signal
increases

+ 1 V

- 1 V

0 V

Center

Point

-0.800

As signal

decreases

Digital Span Selection for Analog Range OutputDigital Span Selection for Analog Range Output

Operational Display

STEP G

STEP H

See Example of Bargraph

Center Point Display Mode

Selection Above

From Digital Span Selection

for Analog Range Output Above

or Direct From Decimal Point

and Brightness Selection Page 5

if Analog Output Option is Not Present

BARGRAPH CENTER POINT
DISPLAY MODE SELECTION

STEP E

STEP F

This branch will only
appear if the analog
output option is installed

To Bargraph Center

Point Display Mode

Selection Below

From Decimal Point and

Brightness Selection

See Page 5

DIGITAL SPAN SELECTION

FOR ANALOG RANGE OUTPUT

STEP E Selecting the [Anhi] Digital Value for Analog High Output

1) Using the and buttons, adjust the display to the desired
digital value at which the [chi] Calibrated Analog High output will
occur. For digital readings outside the digital span selected, the
analog output will linearly rise above the value set for chi, up to the
maximum analog output capability. However, the analog output will
not go lower than the calibrated value set for cLo (see below).

2) Press the P button.

Display toggles between [AnLo] and previous

[AnLo] setting.

STEP F Selecting the [AnLo] Digital Value for Analog Low Output

1) Using the and buttons, adjust the display to the desired
digital value at which the [cLo] Calibrated Analog Low output will
occur. For Digital readings outside the Digital Span selected, the
analog output will not go lower than the calibrated value set for cLo.

2) Press the P button. The display toggles between [cto] and [oFF].

Note: Any two digital span points from –1999 to 9999 can be selected. The digital
values for [Anhi] analog high and [AnLo] analog low can be reversed to provide a 20 to
4mA output. The digital span selected can be as small as two counts, when using the
analog output to function as a Control or Alarm Driver. Small digital spans will cause
the high resolution 16 bit D to A to increment digitally in stair case steps.

See Two Point Analog Output Range Setting and Calibration at the top of the next
page.

Bargraph Center Point Display Mode Selection

Example of Using the Center Point Bargraph Display Mode

with a Unipolar Input

If the meter's full scale range is set to 5000 counts, the midpoint would be
2500 counts. If a signal of 2500 counts is applied only one segment at the
2500 count mark will light up. If a signal of 4000 counts is applied the seg­ments between the center segment (2500 counts) and the 4000 count mark
light up.
If a signal of 1000 counts is applied, the segments between the center seg­ment (2500 counts) and the 1000 count mark will light up.

Example of Using the Center Point Bargraph Display Mode

with Bipolar Signal Inputs

The meter may also be calibrated to display symmetrical bipolar signals such
as ± 1 V or ± 10 V. When the center point display mode is selected, it will then
function as a center zero meter. When positive signals are applied, the bar
will go up from the center point, and when negative signals are applied, the
bar will go down from the center point.

STEP G

1) To select bargraph center point mode, press the or

Bargraph Center Point Mode Selection (See example above)

button. Display changes from [oFF] to [on].

2) Press the P button. Display toggles between [diSP] and [on]
or [oFF].

STEP H Digital Display ON/OFF Selection

1) To set the display to [oFF], press the or button. Display

2) Press the P button. The display exits the calibration mode

toggles between [diSP] and [oFF].

and returns to the operational display. Only the bargraph
display is on and the digital display is off.

If the digital display is selected to be off, pressing any button to
make programming changes or to view setpoints activates the digital display.
When the procedure is complete, the digital display will then automatically
switch off.

The Display/Bargraph settings are now complete.

Crompton • www.crompton-instruments.comPage 6 May 27, 2005 Crompton Bar Digital DS (NK2)

Operational Display

Sub-menu
MODE

STEP A Calibration

Mode

STEP B Calibration

Mode

STEP E

Calibrate

Analog
Output

Lo

STEP F

Calibrate

Analog

Output

Hi

Will only appear if the analog
output option is installed

To Digital Span Selection

for Bargraph Display

See Page 5

To Two Point Digital

Calibration Mode

See Page 4

Operational Display

TWO POINT ANALOG OUTPUT

RANGE SETTING AND CALIBRATION

+ x

– x

4.00

+ x

– x

20.00

Two Point Analog Output Range Setting and CalibrationTwo Point Analog Output Range Setting and Calibration

High Voltage

Transformer is Grey

Low Voltage

Transformer is Black

­+

~

~

+

+

+

+

+

+

ON/OFF

EXT 24V

2V5V10V

20V

Custom

VOLTS

AMPS

2mA

20mA

Custom

LOCK

ON

OFF

Optional Analog
Output Module

Display

Board (Front)

Relay
Activation
LEDs

Bargraph
Segments

Digital Display

Programming
Buttons

100

0

10

30

50

70

90

20

40

60

80

4

3

2

1

P

SP

SP3

SP1

SP4

SP2

Optional 16 Bit Isolated Analog Output Module

4 to 20 mA (0 to 20 mA

)

S

election Positio

n

0

to 10 V D

C

S

election Positio

n

Analog Output

S

election Heade

r

Determine if the Analog Output Selection Header is in the 4 to 20mA (0-20mA) position or
the 0 to 10VDC position. If necessary, the module may have to be removed and the header
position changed (see Component Layout below).

Note: Always disconnect power from the meter before removing the analog output module
to adjust the mA or Volts output selection header and reinstalling it. When power is recon­nected, the meter’s software will automatically detect the presence or absence of the analog
output module.

STEP A Enter the Calibration Mode

1)

2) Press the or button. Display changes from [oFF] to [on].

3) Press the P button. Display toggles between [cAL] and [out] input calibration.

Note: If at this point the display skips directly to toggle between Zero and the previous Zero
setting, the software is detecting that the optional analog output hardware is NOT installed.

STEP B Enter the Two Point Analog [ouT] Output Range Setting and Calibration Mode

1)

STEP E Set or Calibrate [cLo] the Low Analog Value of the Analog Output Range

1)

2)

Press the P and buttons at the same time. Display toggles between [cAL]

and [oFF].

Press the P button. Display toggles between [cLo] and an internal scale factor.

Connect a multimeter to analog output pins 4 and 5 (see Rear Panel Pinouts
on page 10). Using the and buttons, adjust the analog output to the desired
low value as measured on the multimeter. cLo may be adjusted to any value from
–0.3 mA to 18 mA (mA output selected) or from –0.6 V to 8 V (volt output select­ed). However, the output of cLo must always be less than the value selected for
chi. If a reversed analog output is desired, the values selected to establish the
Digital Span can be reversed (see top of page 6). For digital readings outside the
Digital Span selected, the analog output will not go any lower than the calibrated
value set for cLo. However, the analog output will linearly rise above the value set
for chi, up to the the maximum analog output capability (see chi below).

Press the P button. Display toggles between [chi] and an internal scale factor.

STEP F Set or Calibrate [chi] the High Analog Value of the Analog Output Range

1) Using the and buttons, adjust the analog output to the desired high
value as measured on the multimeter display. chi may be adjusted to any
value from 18 mA to 24 mA (mA output) or from 8 V to 10.3 V (volt output).
However, the value must be higher than the value selected for cLo. For digital
readings outside the Digital Span selected, the analog output will linearly rise
above the value set for chi, up to the maximum analog output capability.

2) Press the P button. The meter exits the calibration mode and returns to
the operational display.

Note: The analog output range established by the values selected for cLo and chi will
occur, automatically scaled, between the two digital values selected for AnHi and AnLo.
However, the analog output can linearly rise above the chi value set for digital readings
outside the digital span selected. See Digital Span Selection on page 6.

Component Layout

Note: Always disconnect power from the meter before removing the ana­log output module to adjust the mA or Volts output selection header and
reinstalling it. When power is reconnected, the meter’s software will auto­matically detect the presence or absence of the analog output module.

Crompton • www.crompton-instruments.comMay 27, 2005 Crompton Bar Digital DS (NK2) Page 7

Operational Display

SETPOINT SETTING

AND RELAY

CONFIGURATION MODE

STEP A

STEP B

STEP C

STEP D

No [doM] or [dob]

No [doM] or [dob]

STEP E

STEP F

STEP G

STEP H

To Step I of Setpoint

Setting and Relay

Configuration Page 9

Setpoint Setting and Relay Configuration Mode

The following programming steps are required to enter the setpoint values and config­ure the relay functions in a meter with four relays using four setpoints. Generally if less
than four relays are installed, the setpoints without relays are operational in software for
tri-color control or display only purposes. To remove unwanted setpoint indications, set
them to 9999 or -1999 depending on the relay activation mode selected.

STEP A Enter the Setpoint Mode

1) Press the P and buttons at the same time. Display toggles

STEP B Set Setpoint 1 (SP1)

1) Using the and buttons, adjust the display to the desired SP1 value.

2) Press the P button. Display toggles between [doM] and the previous

STEP C Set the SP1 Delay-on-Make (doM) Delay Time Setting

1)

2) Press the P button. Display toggles between [dob] and the previous

STEP D Set the SP1 Delay-on-Break (dob) Delay Time Setting

1)

2) Press the P button. Display toggles between [hYSt] and the previous

between [SP1] and the previous SP1 setting.

[doM] setting.

Using the and buttons, adjust the display to the desired [doM]
value (0 to 9999 seconds). The reading must continuously remain in an
alarm condition until this delay time has elapsed before the relay will make
contact (energize).

[dob] setting.

Using the and buttons, adjust the display to the desired [dob] value
(0 to 9999 seconds). The reading must continuously remain in a non­alarm condition until this delay time has elapsed before the relay will break
contact (de-energize).

[hYSt] setting.

STEP E Select the Hysteresis (hYSt)

1)

Using the and buttons, select the Hysteresis to be ON or OFF.

2) Press the P button. Display toggles between [SP2] and the previous
SP2 setting.

Note: When hYSt is selected ON, and SP2 is set at a value higher than SP1, the SP1 relay
will operate in a special "pump on pump off" Hysteresis mode. SP2 acts as the upper limit
and SP1 acts as the lower limit of the Hysteresis Band on the SP1 relay.

For filling applications:

rLYS should be set to LhLh (see step I). The SP1 relay and SP1 LED Annunciator will
then activate for inputs less than the SP1 setpoint, and remain ON until the SP2 setpoint is
reached.

For emptying applications:

rLYS should be set to hhhh (see step I). The SP1 relay and SP1 LED Annunciator will then acti­vate for inputs greater than the SP2 setpoint, and remain ON until the SP1 setpoint is reached.

STEP F Set Setpoint 2 (SP2)

1) Using the and buttons, adjust the display to the desired SP2 value.

2) Press the P button. Display toggles between [doM] and the previous
[doM] setting.

STEP G Set Setpoint 3 (SP3) (No [doM] or [dob])

1) Using the and buttons, adjust the display to the desired SP3 value.

2) Press the P button. Display toggles between [SP4] and the previous
SP4 setting.

STEP H Set Setpoint 4 (SP4) (No [doM] or [dob])

1)

Using the and buttons, adjust the display to the desired SP4 value.

2) Press the P button. Display toggles between [rLYS] and the
previous relay setting.

Please Continue On Next Page.

Crompton • www.crompton-instruments.comPage 8 May 27, 2005 Crompton Bar Digital DS (NK2)

[LhLh]
[hLhL]
[hhhh]

STEP I

STEP J

STEP K

STEP L

STEP M

STEP N

[orAn]

[rEd]

NOTE: Will only

appear if a tricolor
display is installed

[orAn]

[rEd]

[orAn]

[rEd]

[orAn]

[rEd]

[orAn]

[rEd]

BARGRAPH COLOR

PROGRAMMING MODE

Operational Display

Operational Display

From From Step H of

Setpoint Setting and Relay

Configuration Page 8

Setpoint Setting and Relay Configuration Mode Continued

1 2 3 4

SP

P

STEP I Set Relay Activation mode [rLYS]

(H) High the relay energizes when the setpoint is exceeded. (L) Low the

1) Using the and buttons, adjust the reading on the display to

2) Press the P button.

If a mono-color red or green display is installed then the Setpoint Relay Programming
Mode is now complete and the meter returns to the operational display.

If a tricolor bargraph display is installed then the Bargraph Color Programming
Mode will be entered and display toggles between [CoL] and the previous setting.
Color selection menu will be displayed.

Bargraph Color Programming Mode

For safety, the tri-color bargraph is designed like a traffic light, to display either
red, orange or green, but only one color at a time. The color to be displayed is
selected in two ways.

First (Step J) is to select the color to be displayed, when the bar is “below*”,
whichever set point is set to the lowest position.

relay energizes below the setpoint. The setpoint is indicated from left to
right SP1, SP2, SP3, SP4.

the desired relay settings: [LLLL], [LhLh], [LLhh], [hhhh].

Second (Steps K, L, M, and N) is to select the color to be displayed when the
bar is above each specific set point, regardless of the order or position to which
the set points are set.

However, if two or more setpoints with differently specified colors are positioned
at the same set point value, the color specified for the set point with the highest
Identifying number will be displayed. When set points are set to the same value,
the SP4 color overrides the SP3 color, the SP3 color overrides the SP2 color, and
the SP2 color overrides the SP1 color.

STEP J Select Bargraph Color when the bar is BELOW* the Setpoint that

is set to the lowest position

1) Using the and buttons, select the desired bargraph color [grn],
[oran] or [red]

2) Press the P button. Display toggles between [CSP1] and the
previous color setting.

STEP K Select Bargraph Color when the bar is ABOVE* SP1 Setpoint

1) Using the and buttons, select the desired bar graph color [grn],
[oran] or [red]

2) Press the P button. Display toggles between [CSP2] and the
previous color setting.

STEP L Select Bargraph Color when the bar is ABOVE* SP2 Setpoint

1) Using the and buttons, select the desired bargraph color [grn],
[oran] or [red]

2) Press the P button. Display toggles between [CSP3] and the
previous color setting.

STEP M Select Bargraph Color when the bar is ABOVE* SP3 Setpoint

1) Using the and buttons, select the desired bargraph color [grn],
[oran] or [red]

2) Press the P button. Display toggles between [CSP4] and the
previous color setting.

STEP N Select Bargraph Color when the bar is ABOVE* SP4 Setpoint

1) Using the and buttons, select the desired bargraph color [grn],
[oran] or [red]

2) Press the P button. The meter exits the setpoint mode and returns
to the operational display.

The Bargraph Color programming mode is now complete.

Crompton • www.crompton-instruments.comMay 27, 2005 Crompton Bar Digital DS (NK2) Page 9

*Note: For horizontal display formats BELOW*

should be read as, “to the left” and ABOVE*

should be read as, “to the right”.

Functional Diagram

2

3

7

1

5

4

8

9
10
11
12
13

14
15

NO3

COM 1 & 3

NO1

NC1

NO4

COM 2 & 4

NO2

NC2

Input HI

24V Excitation

Input LO

-

+

Display

Driver

Multiplexer

and

Buffer

Amplifier

Micro

Processor

1M

0.1

1.25V

Ref Hi

+ 24 V DC

24 V Excitation

Select

20V

10V

5V

2V

GND

Range Select

+ 5 V

— 5 V

14 Bit
Single
Slope
A to D

GND

+ 5 V

GND

+ 5 V

+ 5 V

Relay
Activation
LEDs

Bargraph
Segments

Digital Display

Programming
Buttons

GND

ON OFF

ON

OFF

Isolated 16 Bit Sigma Delta D to A

Select HeadermA V

MOV’s

10A

5A

+ 5 V

SP3

PROGRAM

LOCK

+ 5 V

SP1

MOV’s

10A

5A

+ 5 V

SP4

+ 5 V

SP2

AC Neutral, - DC

AC Line, + DC

AC/DC Power Input

Volts

Amps

+15 V DC

Analog Output

100

0

10

30

50

70

90

20

40

60

80

4

3

2

1

P

SP

Excitation Return

Custom

C
ustom

20m

A

2m
A

NTC

EMI Filter

Isolated

Switching

Supply

-5 V DC

+5 V DC

+24 V DC

ISO
GND

GND

+15 V DC

ISO
GND

COM

1&3

NO3

NC1

SP3

COM

2&4

NC2

NO4

SP4

NO1

SP1

NO2

SP2

1 2 3 4

5

6 7 8 9 10 11 12 13 14 15

AC

Neutral

AC

Line

+ DC - DC

or

Input HI

24V Exc

Input Lo

-

+

Analog
Output

!

(+)

(—)

POWER

—

+

INPUTHIINPUTLOANALOG

OUT

24V
Exc

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Connector Pinouts

Rear Panel Pinout Diagram

This meter uses screw terminals for all input and output
connections.

WARNING: AC and DC input signals and power sup-

ply voltages can be hazardous. Do Not connect live wires
to screw terminals, and do not insert, remove or handle
screw terminals with live wires connected.

Pin Descriptions

Input Signal – Pins 1 to 3

Pin 1 Input HI
Pin 2 24V EXC
Pin 3 Input Lo

Analog Output – Pins 4 to 5

Pin 4 Analog Output +
Pin 5 Analog Output –

Pins 6 to 13 – Relay Output Pins

Pin 6 SP3 NO. Normally Open 5 Amp Form A.
Pin 7 SP1/3 COM. Common for SP1 and SP3.
Pin 8 SP1 NC. Normally Closed 10 Amp Form C.
Pin 9 SP1 NO. Normally Open 10 Amp Form C.
Pin 10 SP4 NO. Normally Open 5 Amp Form A.
Pin 11 SP2/4 COM. Common for SP2 and SP4.
Pin 12 SP2 NC. Normally Closed 10 Amp Form C.
Pin 13 SP2 NO. Normally Open 10 Amp Form C.

Crompton • www.crompton-instruments.comPage 10 May 27, 2005 Crompton Bar Digital DS (NK2)

Pins 14 to 15 – AC/DC Power Input

Pin 14 AC line or +DC. Power input. The standard power is 85
to 265VAC or 95 to 370VDC. Optional power supply of
18 to 48VAC or 18 to 72VDC power is also available.

Pin 15 AC neutral or -DC. Power input. The standard power is
85 to 265VAC or 95 to 370VDC. Optional power supply
of 18 to 48VAC or 18 to 72VDC power is also available.

Typical Application Circuits and Connection Instructions

Multiplexer

and

Buffer

Amplifier

Micro

Processor

1M

0.1

1.25V

Ref

+ 24 V DC

Exc. Return

24 V Excitation

Select

GND

+ 5 V

— 5 V

14 Bit
Single
Slope
A to D

GND

+ 5 V

GND

+ 5 V

+ 5 V

GND

ON

OFF

Isolated 16 Bit Sigma Delta D to A

Select HeadermA V

Amps

Volts

+15 V DC

1

2

3

4

5

Analog Output

(Isolated)

Input Hi

External

Loop

Supply

4-20 mA

Transmitter

Input Lo

+

—

Other devices can be

added to the loop.

Custom

20V

10V

5V

2V

Custom

20mA

2mA

Voltage

Range Select

Current

Range Select

+

_

Multiplexer

and

Buffer

Amplifier

Micro

Processor

1M

0.1

1.25V

Ref

+ 24 V DC

Exc. Return

24 V Excitation

Select

GND

+ 5 V

– 5 V

14 Bit
Single
Slope
A to D

GND

+ 5 V

GND

+ 5 V

+ 5 V

GND

ON

OFF

Isolated 16 Bit Sigma Delta D to A

Select HeadermA V

Amps

Volts

+15 V DC

1

2

3

4

5

with 24V Excitation provided by the Bargraph

Custom

20V

10V

5V

2V

Custom

20mA

2mA

Voltage

Range Select

Current

Range Select

Input Hi

4-20 mA

Transmitter

+24V Exc

Other devices can be

added to the loop.

Analog Output

(Isolated)

+

–

Multiplexer

and

Buffer

Amplifier

Micro

Processor

1M

0.1

1.25V

Ref

+ 24 V DC

Exc. Return

24 V Excitation

Select

Custom

20V

10V

5V

2V

Custom

20mA

2mA

GND

Voltage

Range Select

Current

Range Select

+ 5 V

— 5 V

14 Bit
Single
Slope
A to D

GND

+ 5 V

GND

+ 5 V

+ 5 V

GND

ON

OFF

Isolated 16 Bit Sigma Delta D to A

Select HeadermA V

Amps

Volts

+15 V DC

1

2

3

4

5

Input Hi

DC V

Analog Output

(Isolated)

Input Lo

+

—

SINGLE CHANNEL 4 to 20 mA DC:

with External 24V DC Excitation.

SINGLE CHANNEL 4 to 20 mA DC:

Example shown is with the Isolated Analog Output Option.

Example shown is with the Isolated Analog Output Option.

SINGLE CHANNEL DC Volts:

Example shown is for 10V DC with Isolated Analog Output option.

Select appropriate range of 2V, 5V, 10V or 20V. (Custom ranges also available).

Crompton • www.crompton-instruments.comMay 27, 2005 Crompton Bar Digital DS (NK2) Page 11

Bezel NEMA-4X Lens Cover

36mm (1.42")

144mm (5.67")

Rear View

35mm (1.38")

Base

O-ring

Gasket

Cover

Removable
Key-lock

Panel

Safety
Catch

Part #: OP-N4/144T36

This cover is designed to be dust and water
proof to NEMA-4 standards. The lens cover
consists of a base and cover with a cam hinge
and key-lock locking device.
An O-ring, or Neoprene gasket forms a seal
between the base and the panel. The cam hinge
holds the cover from closing when opened until
pushed closed. A safety catch keeps the cover
closed even when the key is removed and the
key hole can be used to attach a safety seal clip,
preventing unauthorized opening.

Top View

9mm (0.35")

139mm

(5.47")

139mm

(5.47")

135mm (5.32")

160mm (6.3")

16mm (0.63")

Installation Instructions

!

STEP A Prepare the Panel

1) Cut a hole in the panel to suit the panel cutout. See
Case Dimensions for panel cutout sizes.

STEP B Fit the Meter

1) Turn both mounting screws counterclockwise to allow
for the thickness of the panel.

2) Make sure that both lugs on the mounting screws are
flush with the edge of the bargraph case.

3) Push the bargraph into the panel cutout from the front
of the panel.

4) Push and turn the mounting screws in a clockwise
direction until they are tight.

STEP C Connect the Cables

1) Connect all input cables to the connector pins (see
Connector Pinouts for details).

2) Connect the power cables to the connector pins (see
Connector Pinouts for details).

Case Dimensions

Mounting

Screw

WARNING

AC and DC power supply voltages are hazardous.
Make sure the power supply is isolated before
connecting to the bargraph.

Lug in flush

position

Panel

Lug in

tightened

position

Panel

Crompton Instruments Ltd.

Freebournes Road
Witham
CM8 3AH
Essex
Tel: [phone] • Fax: [phone]

Crompton • www.crompton-instruments.comPage 12 May 27, 2005 Crompton Bar Digital DS (NK2)

Crompton Instruments Inc.

1640 Airport Road #109
Kennesaw, GA 30144
Tel: [phone] • Fax: [phone]