Instructions
F20B, F22B
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 pres-
sure/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 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 ini-
tially indicates _ _ _ _ with the first underscore blinking, and with
CALPC
(calibration pass code) on the lower display.
Enter the 3510 pass code as described in the Configuration Pass
Code section.
Calibration Mode
The gauge enters and remains in the Calibration Mode until
restarted manually or power is removed. Features not related to
calibration are disabled and compound range models are set for the
same engineering 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 resolution (highest number
of display counts).
Press and release the Power button when the appropriate engineer-
ing units are displayed. Suggested units are listed below.
Sensor
Suggested units for calibration
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
4613 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 of these small changes to result in a single
digit 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.
Apply full-scale pressure. The character display will alternate
between
+SPAN
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.
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.
Apply full-scale vacuum. The character display will alternate
between
+SPAN
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.
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.
Apply full-scale pressure. The character display will alternate
between
+SPAN
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
between
+MID
and
CAL
. Press the
s
and
t
buttons to obtain
an indication equal to 50% of full-scale pressure.
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
alternate between
-MID
and
CAL
. Adjust for a display indication
equal to 50% of full-scale vacuum using the
s
and
t
buttons.
Save Calibration
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 pressure indications at 0%, 25%, 50%, 75% and 100%
of full scale.
The factory default pass code 3510 may be changed to a different
value for configuration and/or calibration.
Configuration Pass Code
With the unit off, press and hold the
s
button to view and/or
change the user configuration pass code. Then press the Power
button. Release all buttons when the display indicates
CFG
.
Calibration Pass Code
With the unit off, press and hold the
t
button to view and/or
change the user calibration pass code. Then press the Power but-
ton. Release all buttons when the display indicates
CAL
.
Change Pass Code Mode
Before the unit enters the view or change pass code mode, the
display initially indicates _ _ _ _ with the first underscore blinking,
and with
CFGPC
or
CALPC
on the character segments.
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
without entering any pass code characters.
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.
Change Pass Code
Once the access code has been entered correctly, the display will
indicate the existing user-defined pass code with
CFGPC
or
CALPC
on the character segments.
Press the
s
or
t
button to select the first character of the new
pass code.
When the correct first character is being displayed, press and
release the Power button to proceed to the next pass code character.
Repeat above until the entire pass code is complete.
To exit the User Defined Pass Code change mode, press and hold
the Power button.
Release the button when the display indicates
- - - -
to restart
the gauge.
Calibration
User-Defined Pass Code Configuration
Calibration
—
continued
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.
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.
The M8 version allows recording of up to eight pressure readings.
While in the memory mode the peak reading is captured.
The eight MEM 1 through MEM 8 labels are factory set.
F20B Memory
—
M8 Versions
F20B Memory
—
M4 Versions
The M4 version allows recording pressure
readings of up to four tires. While in the
memory mode the peak reading is captured.
The number 1 is shown on the upper dis-
play. The lower display will indicate the label
for memory 1.
Use the
s
and
t
buttons to select the
desired label:
MEM I
,
LR
(left rear),
RR
(right rear),
RF
(right front), or
LF
(left front).
Each of the memory locations may be
renamed as desired in any sequence. Care
should be taken to avoid duplication or
omission of a position.
When the desired label for memory 1 is
displayed, press the Power button.
Repeat the steps for the other memory locations. When the desired
label for memory 4 is displayed, press and release the Power button to
save the user configuration and restart the gauge.
I
Mem I
- or -
I
LF
t
s
Zero/Clear
Memory
t
s
Zero/Clear
Memory
*
*
*
If a special memory configuration was ordered,
the custom memory labels may be shown.
In some cases, it may be possible to rename
the MEM locations to the custom labels. If this
is the case, use the following example below.
After auto shutoff time selection, the number
1 is on the upper display. The lower display
will indicate the label for memory 1.
Use the
s
and
t
buttons to select MEM 1,
or the programmed memory label.
When the desired label for memory 1 is dis-
played, press and release the Power button.
Repeat the steps for the other memory
locations. When the desired label for the last
memory location is displayed, press and release the Power button
to save the user configuration and restart the gauge.
F20B Memory
—
Custom Versions
I
Mem I
I
NLG I
t
s
Zero/Clear
Memory
*
*
- or -
t
s
Zero/Clear
Memory
*
F22B Backlight Time Selection
The lower display will indicate
BL
if the
display backlight is enabled or
NO BL
if
display backlight is disabled.
Use the
s
button to enable backlighting
and the
t
button to disable backlighting.
Press the power button to save the setting.
If
NO BL
was selected the user setup is
complete and the gauge will restart and be
ready for use with the new configuration.
If
BL
was selected the current backlight
auto shutoff time is displayed in minutes.
1 minute is the factory default.
Use the
s
and
t
buttons to select the
minutes for backlight shutoff time.
A setting of zero disables the auto shutoff timer and the backlight
will be on whenever the gauge is on. The maximum setting is 255
minutes. The gauge auto shutoff time will override the backlight
time. When the desired time is displayed, press and release the
power button to save your selection and restart the gauge.
t
s
Zero/Clear
Memory
*
*
BL
- or -
No BL
t
s
Zero/Clear
Memory
2
BLTMR
*
*
- or -
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800-942-0315
CECOMP
Div. of
A
BSOLUTE
P
ROCESS
I
NSTRUMENTS
