Ashcroft GC35 User Manual

Quick Start Function Instructions for

5

Collector/switch 1
LED operation
indicator (OUT 2)

1

4 Digit, 8mm

LED display

4

UP key

3

DOWN key

2

MODE key

6

Setting mode
LED operation
indicator (SET)

5

Collector/switch 1
LED operation indicator
(OUT 1)

2.00˝

3´.00˝

GC35 Heavy Duty Digital Pressure Sensor
Version 1.0 6/06/09

(See Complete I&M Manual for Further Detail)

DISPLAY OVERVIEW

 Measurement Display

 Mode Key

 Down Key #

 Up Key $

 Collector / Switch LED

Operation Indicator
(OUT1)/(OUT2)

 Switch Setting Mode LED

Operation Indicator (SET)

Note: Unit requires M12 mating connector p/n# 611C175-03

© 2010 Ashcroft Inc., 250 East Main St., Stratford, CT 06614-5145, USA, Tel: [phone], Fax: [phone],
www.ashcroft.com All sales subject to standard terms and conditions of sale.
8/10 I&M011-10182-GC35 Ver. 6.03 Rev. B

(standard 3 foot length) – see below.

Designation

MODE

Function

Display of pressure, linear scaling

Change to/from switch setting modes and
product’s settings

Change selections / decrease set values

Change selections / increase set values

Indicates switch state. LED indicator will be ON
when switch is activated

Identifies that the switch setting has been
performed

1. Measurement Mode is entered when applying power to the unit – LED displays

PRESSURE RANGE (%F.S.)

ANALOG OUPUT (mA dc)

-100 -50 0 50 100 150

20

16

12

8

4

PRESSURE RANGE (%F.S.)

ANALOG OUPUT (mA dc)

-100 -50 0 50 100 150

20

16

12

8

4

applied pressure.

2. Available “Measurement Mode” functions:

A. Zero Adjustment: Press MODE / # keys together ⱖ 3 seconds. This initiates

automatic zero adjustment; ADJ briefly appears on LED display and then returns
to Measurement Mode.

B. Peak / Bottom (Min. Max.) Hold Display: Displayed as $ or # keys are held

for more than 3 seconds and display shows PE+. Values are reset when power
is restored to the unit, or:
Reset Peak: Hold $ key, then press # key
Reset Bottom: Hold # key, then press $ key

C. Key Lock: Prevents overwriting values / tampering – can not be reset by restor-

ing power.
Lock:Press MODE and $ keys together;Lo( appears on LED display for 1 second.
Unlock: Press MODE and $ keys together; UnL appears on LED display for 1
second.

3. Function Setting Mode: Used for product settings, except comparator-switch set­ting. Accessed by pressing MODE key for more than 3 seconds (complete menu
attached).

A. Comparator Selection: Select ‘Hysteresis’ (kYS) or ‘Window Comparator’ (Yn).

Hysteresis: Switch remains activated until reset point has been achieved.
Window Comparator: Switch activates each time pressure enters a set ‘pres­sure band’ determined by the A and B settings.

B. Comparator Operation Selection: Select nPn or PnP. Note: LED ring is Blue

with nPn and Green with PnP.

C. Filter Dampening Setting: This is based upon a moving average of pressure

data to reduce display “bounce” and smooth analog output due to system pres­sure fluctuations. User configurable with five selections:
25ms, 250ms, 2.5s, 5s and 10s.
Filter will not be applied if 0 is selected.

D. Power-Save (Energy-Saving) Setting: Product is equipped with automatic

LED display turn-off feature. User may elect to turn-on display when reading
pressure or using as an indicating instrument.

E. LED Ring Feature Setting: Turns Red when comparator-switch is ON and Blue

(nPn) or Green (PnP) when comparator-switch is OFF.

F. Display Unit Setting: User may alter unit of measures from standard to arbitrary.
G. Display Settings: Allows for decimal point adjustment.
H. Analog Output Scaling: Available with only 1 comparator; function sets analog

output for pressures corresponding to Zero (4mA) and Span (20mA) adjustment
in percentage figures.
Analog output under zero point pressure: After A-L is displayed, select the per­centage corresponding with the current analog output value under Zero (4mA)
using
# or $ keys – when pressure range displayed is set to 0.0-100.0% FS.
Analog output under span point pressure: After A-K is displayed, select the per­centage corresponding with the current analog output value under Span (20mA)
using
# or $ keys – when pressure range displayed is set to 0.0-100.0% FS.

Example 1) Example 2)

2

Comparator Setting Mode

Loop Check Mode

Measurement Mode

Press less
t

han 3 sec.

(In Case of Intact)

(In Case of Intact)

(In Case of Analog Output)

Press 3 sec.

or longer

MODE

MODE

Comparator 1 Use/No Use

MODE

After 1 second

US1

USE

USE

noU

Select with

X W

keys

Message displayed

Current setting

In use Not in use

Setting Storage of Comparator

MODE

After 1 second

Sav

5-I

5-I

5-2

Message displayed

Storage Area Indication

Storage Area 1 Storage Area 2

Comparator 1 Setting Point A

MODE

After 1 second

A-1

5.00

Message displayed

Current setting

X

W

set any desired value within the

–1999 to 9999 range with UP/Down keys

MODE

Comparator 1 ON Delay

After 1 second

on1

0.00

Message displayed

Current setting

X W

set any desired value within the

0 to 2 sec range with UP/Down keys

Comparator 1 Setting Point B

After 1 second

b-1

1.00

Message displayed

Current setting

X W

set any desired value within the

–1999 to 9999 range with UP/Down keys

MODE

MODE

Comparator 1 OFF Delay

After 1 second

oF1

0.00

Message displayed

Current setting

X W

set any desired value within the

0 to 2 sec range with UP/Down keys

Select

X W

keys/reading by long pushing

Select

X W

keys/reading by long pushing

Comparator 2 Use/No Use

M

ODE

After 1 second

US2

USE

USE

noU

Select with

X W

keys

Message displayed

Current setting

In use Not in use

Comparator 2 Setting Point A

MODE

After 1 second

A-2

5.00

Message displayed

Current setting

X W

set any desired value within the

–1999 to 9999 range with UP/Down keys

MODE

Comparator 2 ON Delay

After 1 second

on2

0.00

Message displayed

Current setting

X W

set any desired value within the

0 to 2 sec range with UP/Down keys

Comparator 2 Setting Point B

After 1 second

b-2

1.00

Message displayed

Current setting

X W

set any desired value within the

–1999 to 9999 range with UP/Down keys

MODE

MODE

Comparator 1 OFF Delay

After 1 second

on2

0.00

Message displayed

Current setting

X W

set any desired value within the

0 to 2 sec range with UP/Down keys

MODE

Loop Check Mode

After 1 second

Lop

7.52

Message displayed

Before mode shift

setting value

X W

key to select an arbitrary number
between -10 to 110%F.S.of the current
dispaly unit for simulating the pressure

Setting Loading of Comparator

MODE

After 1 second

Lod

L-1

L-1

l-2

Message displayed

Storage Area Indication

Storage Area 1 Storage Area 2

Function Setting Mode Menu

3

Notes: Values shown are from the example within the complete I&M manual.

Changes made in the Setting Mode are saved by returning to Measurement
Mode before powering off the unit.

4. Comparator-Switch / Loop Check Mode: Access by pressing MODE for less

P5I

Function Setting Mode

Filter Setting

Decimal Point Position

Display Unit Setting

Select Comparator Mode

LED Ring Feature Setting

C

omparator Operation

Selection

Measurement Mode

Press 3 sec.

o

r longer

P

ress 3 sec.
or longer

M

ODE

M

ODE

MODE

MODE

MODE

M

ODE

MODE

MODE

MODE

MODE

MODE

MODE

A

fter 1 second

kY5

kY5

!;n

Select with

X W

k

eys

Select with

X W

k

eys

S

elect with

X W

keys

M

essage displayed

Current setting

Hysteresis Window comparator

A

fter 1 second

OP(

npn

npn

pnp

Message displayed

C

urrent unit
setpoint

N

PN output PNP output

S

elect with

X W

keys

EoF

Eon

Power-save OFF Power-saveON

e(O

Message Display Current Setting

e(O

eOf

After 1 second

f;l

f-1

Message displayed

Current setting

After 1 second

lRg

Message Display Current Setting

L

lRI

After 1 second

Select with

X W

keys

ET[

P5I

psi, bar or mPa Display Scaling

UN;

Message Display Current Setting

u

After 1 second

Select with

X W

keys

Power-save setting

(Display Scaling)

Set Offset Value

(Display Scaling Set)

Full Scale Value

Pressure when the

analog is at zero point

Pressure when the

analog is at span point

f-0

Filter off

f-1

Timeconstant25ms

f-2

T

imeconstant 250ms

f-3

Time constant 2.5s

f-4

Time constant 5s

f-5

T

ime constant 10s

Select with

X W

keys

Set Any Desired Position Within the

–100 to 150% range with the

X W

keys

Set Any Desired Position Within the

–100 to 150% range with the

X W

keys

X W

Key to Select Between
(–)1999~(+)9999

X W

Key to Select Between
(–)1999~(+)9999

0

0.0

0.000

0.00

Lr0

No LED interlock

Lr1

Comparator1 is

interlockedwith LED

Lr3

Comparator 1 & 2 are

interlocked with LED

Lr2

Comparator 2 is

interlocked with LED

d-p

Message Display Current Setting

d

0.00

After 1 second

d-l

Message Display Current Setting

d

0.00

After 1 second

d-K

Message Display

Only in Output Selection

Display Scaling

Current Setting

d

0.00

After 1 second

A-L

Message Display Current Setting

a

0.0

After 1 second

a

Message Display Current Setting

a-k

100.0

After 1 second

DI SPL AY S ET TIN G

AN ALO G O UPU T S CAL ING

(n~P

Comparator-Switch Setting / Loop Check Menu

than 3 seconds.
A. Comparator-Switch Setting: To activate / deactivate comparator-switch,

scroll to US1 (4-20mA version only) or US2 and select USE / noU. Enter com­parator-switch set point by selecting A-1 or A-2 and use #/$ keys for pres­sure setting. Now enter ‘deadband’ value (pressure difference between set
and reset values) by selecting b-1 or b-2 and use #/$ keys for setting. Note:
unit automatically configures the reset point. Increasing setpoint is entered as
a positive ‘deadband’ value, while decreasing setpoint is entered as a negative
‘deadband’ value.

B. Loop Check: Allows the user to check comparator-switch operation without

requiring pressure input. Use $ or # keys to view comparator-switch function
in a simulated test of the application.

4