Meriam MGF16BN Digital Pressure Gauge - Manual (Page 2)

USER CoNFiGURATioN
Remove the rear cover to gain access to the buttons located near the lower right and left
corners of the circuit board.
With the gauge off, press and hold the UP button. Then press the front button. Release
all buttons when the display indicates CFG and the program version then the full-scale
range is indicated and the display segments are tested.
The display then indicates _ _ _ _ with the first underscore blinking, and with PASS
on the character segments.
Note: The gauge will automatically revert to normal operation if no buttons are oper-
ated for approximately 15 seconds. To cancel and return to normal operation, press and
release the front button without entering any pass code characters.
Enter the user-modifiable pass code (3510 factory default)
1. Use the UP or DOWN buttons to set the left-most digit to 3.
2. Press and release the front button to index to the next position. The 3 will remain,
and the second position will be blinking.
3. Use the UP or DOWN buttons to select 5.
4. Press and release the front button to index to the next position.35 will remain, and
the third position will be blinking.
5. Use the UP or DOWN buttons to select i.
6. Press and release the front button to index to the next position. 35i will remain, and
the fourth position will be blinking.
7. Use the UP or DOWN buttons to select 0.
8. Press and release the front button to proceed with configuration procedures.
If an incorrect pass code is entered, the gauge will return to the start of the pass code
entry sequence.
Factory/User configuration
The upper display section will be blank, and the lower section will display either
USER_ or FCTRY.
If USER_ is selected, the existing user configuration will be retained and will be acces-
sible for modification as described in the following steps. To select USER_, press and
release the DOWN button. The lower section of the display will indicate USER_. Press
and release the front button to continue with configuration.
If FCTRY is selected, the existing user configuration will be replaced by the configura-
tion as it left the factory. To select FCTRY, press and release the UP button. The lower
section of the display will indicate FCTRY. Press and release the front button to restore
the factory configuration and restart the gauge.
high and low value capture configuration
The upper display section will be blank.
Use the UP and DOWN buttons to select from the following:
HI/LO
Both highest and lowest values measured will be captured
HI/-- Only highest value measured will be captured
--/LO Only lowest value measured will be captured
--/-- Capture feature is disabled
Press and release the front button to move on to the next parameter.
Gauge type configuration (vacuum/pressure models only)
This will only appear with 15, 100, or 200 psig ranges that were originally ordered as
compound gauges.
The upper display section will be blank.
Use the UP and DOWN buttons to select from the following:
-/+EU
Vacuum is indicated as negative pressure in the selected engineering units
CMPND Vacuum is negative INHG, pressure is PSI
Press and release the front button to save the user configuration and restart the gauge.
Replace the rear cover taking care not to pinch the power wires between the cover and
the case.
CALiBRATioN
The gauge is calibrated at the factory using equipment traceable to NIST. There is no
need to calibrate the gauge before putting it in service.
Calibration should only be performed by qualified individuals using appropriate calibra-
tion standards and procedures. The calibration equipment should be at least four times
more accurate than the gauge being calibrated. The calibration system must be able to
generate and measure pressure/vacuum over the full range of the gauge. A vacuum pump
able to produce a vacuum of 10 microns (0.01 torr or 10 millitorr) or lower is required
for vacuum gauges.
Remove the rear cover to gain access to the UP and DOWN buttons located near the
lower right and left corners of the circuit board.
With the gauge off, press and hold the DOWN button. Then press the front 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 proceeds to show all display
segments.
Before the gauge enters the Calibration Mode, the display initially indicates _ _ _ _ with
the first underscore blinking, and with PASS on the character segments.
Note: The gauge will automatically revert to normal operation if no buttons are oper-
ated for approximately 15 seconds. To cancel and return to normal operation, press and
release the front button without entering any pass code characters.
Enter the user-modifiable pass code (3510 factory default)
1. Use the UP or DOWN buttons to set the left-most digit to 3.
2. Press and release the front button to index to the next position. The 3 will remain,
and the second position will be blinking.
3. Use the UP or DOWN buttons to select 5.
4. Press and release the front button to index to the next position.35 will remain, and
the third position will be blinking.
5. Use the UP or DOWN buttons to select i.
6. Press and release the front button to index to the next position. 35i will remain, and
the fourth position will be blinking.
7. Use the UP or DOWN buttons to select 0.
8. Press and release the front button to proceed with configuration procedures.
If an incorrect pass code is entered, the gauge will return to the start of the pass code
entry sequence.
The gauge enters and remains in the Calibration Mode until restarted manually or power
is removed. While in the Calibration Mode, the auto shutoff timer is disabled, the push
button zeroing at startup is disabled, the Min/Max feature is 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 engineering units as well as
percent (PCT). For greatest accuracy, use the UP and DOWN buttons to select engineer-
ing units for calibration with highest resolution. Press and release the front button when
the appropriate engineering units are displayed. Suggested units are listed below.
Sensor
Suggested range and units for calibration
5 PSI 5.000 PSI
15 PSI 775.7 MMHG (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 500.0 PSI
1000 PSI 70.31 KG/CM2
2000 PSI 4072 INHG
3000 PSI 6108 INHG
5000 PSI 5000 PSI
Any 10000 PCT (percent)
The display will then indicate the currently applied pressure in the engineering units
selected for calibration.
Gauge reference pressure gauges
Apply zero pressure. This may be done by venting to atmosphere. The character seg-
ments of the display will alternate between ZERO and CAL. Adjust for a display
indication of zero using the UP and the DOWN buttons. *See note below.
Apply full-scale pressure. The character segments of the display will alternate between
+SPAN and CAL. Adjust for a display indication of full-scale pressure using the UP
and the DOWN buttons. *See note below.
Apply 50% full-scale pressure. The character segments of the display will alternate
between +MID and CAL. Adjust for a display indication equal to 50% of full-scale
pressure using the UP and the DOWN buttons. *See note below.
Compound gauges (vacuum/pressure ranges)
Warning: application of vacuum to non-vacuum models may result in irreparable dam-
age to the sensor.
In addition to the steps described above for pressure gauges, apply full-scale vacuum.
The character segments of the display will alternate between -SPAN and CAL. Adjust
for a display indication of actual applied vacuum using the UP and the DOWN buttons.
*See note below.
For bipolar and –30.00inHg/+15.00psig compound range models only, apply 50% full-
scale vacuum. The character segments of the display will alternate between -MID and
CAL. Adjust for a display indication equal to 50% of full-scale vacuum using the UP
and the DOWN buttons. *See note below.
* Note: Each time one of the calibration 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 calibration button. After about one second, the display
will begin to change continuously. Release the button to halt the continuous change.
Then make fine adjustments by pressing and quickly releasing the calibration buttons
as previously described.
Save Calibration
Once the adjustments are complete, press and hold the front 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.
Replace the rear cover taking care not to pinch the power wires between the cover and
the case.
MGF16BN Configuration and Calibration instructions
© 01-09