Instructions CTP3B
Sensor
Suggested units for calibration
3 PSI
6.920 FTH2O
5 PSI
5.000 PSI
15 PSI
775.7 MMHG or TORR
30 PSI
61.08 INHG
50 PSI
50.00 PSI
60 PSI
60.00 PSI
100 PSI
7.031 KG/CM2
200 PSI
407.2 INHG
300 PSI
610.8 INHG
500 PSI
3447 KPA
1000 PSI
6895 KPA
2000 PSI
4614 FTH2O
3000 PSI
6920 FTH2O
5000 PSI
5000 PSI
The display will then indicate the currently applied pressure in the
engineering units selected for calibration.
s
and
t
Button Operation
Each time one of the
s
or
t
buttons is pressed and released quickly,
a small change is made to the digitized pressure signal. It may take
more than one button press to make a change on the display.
To make larger changes, press and hold the appropriate button.
After about one second, the display will begin to change continu-
ously. Release the button to stop. Then make fine adjustments by
pressing and quickly releasing the buttons as previously described.
Gauge Reference Pressure Gauges
Apply zero pressure by venting the gauge port to atmosphere. The
character display will alternate between ZERO and CAL. Adjust for a
display indication of zero using the
s
and
t
buttons.
Note: At this point you may re-zero the gauge without doing any
other calibration. Press and hold the Power button until the display
indicates - - - - then release the button to store the new zero in
non-volatile memory and restart the gauge.
Apply full-scale pressure. The character display will alternate
bSPAN and CAL. Adjust for a display indication of full-
scale pressure using the
s
and
t
buttons.
Apply 50% full-scale pressure. The character display will alternate
between +MID and CAL. Adjust for a display indication equal to
50% of full-scale pressure using the
s
and
t
buttons.
Press and hold the Power button until the display indicates - - - -
then release the button to store the calibration parameters in non-
volatile memory and restart the gauge.
Verify readings at 0%, 25%, 50%, 75% and 100% of full scale.
Gauge Reference Vacuum Gauges
Apply zero pressure by venting the gauge port to atmosphere. The
character display will alternate between ZERO and CAL. Adjust for a
display indication of zero using the
s
and
t
buttons.
Note: At this point you may re-zero the gauge without doing any
other calibration. Press and hold the Power button until the display
indicates - - - - then release the button to store the new zero in
non-volatile memory and restart the gauge.
Apply full-scale vacuum. The character display will alternate
bSPAN and CAL. Adjust for a display indication of full-
scale vacuum using the
s
and
t
buttons.
Apply 50% full-scale vacuum. The character display will alternate
between +MID and CAL. Adjust for a display indication equal to
50% of full-scale vacuum using the
s
and
t
buttons.
Press and hold the Power button until the display indicates - - - -
then release the button to store the calibration parameters in non-
volatile memory and restart the gauge.
Verify the readings at 0%, 25%, 50%, 75% and 100% of full scale.
Absolute Reference Gauges
Apply full vacuum to the gauge. The character display will alternate
between
ZERO
and
CAL
. Press the
s
and
t
buttons to obtain a
display indication of zero.
Note: At this point you may re-zero the gauge without doing any
other calibration. Press and hold the Power button until the display
indicates - - - - then release the button to store the new zero in
non-volatile memory and restart the gauge.
Apply full-scale pressure. The character display will alternate
bSPAN and CAL. Press the
s
and
t
buttons to obtain a
display indication equal to full-scale pressure.
Apply 50% of full-scale pressure. The lower display will alternate
bMID and CAL. Press the
s
and
t
buttons to obtain an
indication equal to 50% of full-scale pressure.
Press and hold the Power button until the display indicates - - - -
then release the button to store the calibration parameters in non-
volatile memory and restart the gauge.
Verify the readings at 0%, 25%, 50%, 75% and 100% of full scale.
Battery Replacement
A low battery indication will be shown in the upper left-
hand corner of the display when the battery voltage falls
sufficiently. The batteries should be replaced soon after the
indicator comes on or unreliable readings may result.
1. Remove the 6 Phillips screws on the back of the unit.
2. Lift up the battery holder if necessary.
3. Remove batteries by lifting up the positive end of the battery
(opposite the spring) taking care not to bend the battery holder
spring.
4. Discard old batteries properly, do not discard into fire, sources
of extreme heat, or in any hazardous manner.
5. Always replace both batteries at the same time with high quality
alkaline batteries.
6. Install batteries with correct orientation. Incorrect polarity will
damage the gauge. The negative (flat) end of each battery
should be inserted first facing the battery holder spring.
7. Replace battery holder and back cover, including the rubber
gasket and reinstall the six screws.
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CECOMP
Div. of
A
BSOLUTE
P
ROCESS
I
NSTRUMENTS
Calibration—Setup and Preparation
Gauges are calibrated at the factory using equipment traceable
to NIST. There is no need to calibrate the gauge before putting
it into service. Calibration should only be performed by qualified
individuals using appropriate calibration standards and procedures.
Calibration intervals depend on your quality control program
requirements, although many customers calibrate annually.
The calibration system must be able to generate and measure
pressure/vacuum over the full range of the gauge and should be
at least four times more accurate than the gauge being calibrated.
A vacuum pump able to produce a vacuum of 100 microns (0.1 torr
or 100 millitorr) or lower is required for vacuum and absolute gauges.
Allow the gauge to acclimate to ambient temperature for 20 minutes.
Install fresh batteries.
Entering Calibration Mode
With the gauge off, press and hold the
t
button, then press the
Power button.
Release all buttons when the display indicates CAL.
The display begins by indicating the full-scale positive pressure
rating of the gauge in the engineering units as configured by the
factory, and then shows all display.
Before the gauge enters the Calibration Mode, the display initially
indicates _ _ _ _ with the first underscore blinking, and with CALPC
(calibration passcode) on the lower display.
Enter the 3510 passcode as described in the Configuration
Passcode section.
Calibration Mode
The gauge remains in the Calibration Mode until restarted manually
or power is removed. Features not related to calibration are dis-
abled and compound range models are set for the same engineer-
ing units for pressure and for vacuum.
The calibration may be performed in any of the available engineer-
ing units as well as percent (PCT).
For greatest accuracy, use the
s
and
t
buttons to select engi-
neering units for calibration with highest number of display counts.
Press and release the Power button when the appropriate engineer-
ing units are displayed. Suggested units are above right.
Compound and Bipolar Gauges
In addition to the steps described above for pressure gauges, apply
full-scale vacuum. The character display will alternate between
-SPAN and CAL. Adjust for a display indication of actual applied
vacuum using the
s
and
t
buttons.
For bipolar and –30.15.00psig compound range models
only, apply 50% full-scale vacuum. The character display will alter-
nate between -MID and CAL. Adjust for a display indication equal to
50% of full-scale vacuum using the
s
and
t
buttons.
User-Defined Passcode Configuration
The factory default passcode 3510 may be changed to a different
value for configuration and/or calibration.
With the unit off, press and hold the
s
button to view and/or
change the user configuration passcode. Then press the Power
button. Release all buttons when the display indicates CFG.
Calibration Passcode
With the unit off, press and hold the
t
button to view and/or
change the user calibration passcode. Then press the Power button.
Release all buttons when the display indicates CAL.
Change Passcode Mode
Before the unit enters the view or change passcode mode, the
display initially indicates _ _ _ _ with the first underscore blinking,
and with CFGPC or CALPC on the character display.
Note: The unit will automatically revert to normal operation if no
buttons are operated for approximately 15 seconds. To cancel and
return to normal operation, press and release the Power button.
Enter access code 1220:
Use the
s
and
t
buttons to set the left-most digit to 1.
Press and release the Power button to index to the next position.
The 1 will remain, and the second position will be blinking.
Use the
s
and
t
buttons to select 2.
Press and release the Power button to index to the next position. 1
2 will remain, and the third position will be blinking.
Use the
s
and
t
buttons to select 2.
Press and release the Power button to index to the next position. 1
2 2 will remain, and the fourth position will be blinking.
Use the
s
and
t
buttons to select 0.
Press and release the Power button to proceed.
Note: If an incorrect access code was entered, the gauge will return
to the start of the access code entry sequence.
Once the access code has been entered correctly, the display will
indicate the existing user-defined passcode with CFGPC or CALPC
on the character segments.
Press the
s
or
t
button to select the first character of the new
passcode.
When the correct first character is being displayed, press and
release the Power button to proceed to the next passcode character.
Repeat above until the entire passcode is complete.
To exit the User Defined Passcode change mode, press and hold
the Power button.
Release the button when the display indicates - - - - to restart
the gauge.
Disposal
Disposal of Electrical & Electronic Equipment
(Applicable throughout the European Union and
other European countries with separate collec-
tions programs).
This symbol, indicates that this product should
not be treated as household waste when you
wish to dispose of it.
Instead, it should be sent to an applicable collec-
tion point for the recycling of electrical and electronic equipment.
The recycling of materials will help to protect and conserve natural
resources and prevent potential negative effects on human health
and the environment, which could otherwise arise from inappropri-
ate waste handling.
Please contact your local waste disposal authority for information
about recycling this product and the location of your nearest des-
ignated collection point.
You may also return this product to via pre-paid shipping to
Absolute Process Instruments or your supplier for proper disposal.
