Martel Electronics BetaGauge PI Operating Manual
BetaGauge PI
Digital Pressure Test Gauge
User Reference Manual
1
Introduction
The BetaGauge PI combines the high accuracy of digital electronics
with the convenience and ease of use of an analog test gauge.
Accurate to ± 0.05% FS, the BetaGauge PI can be used as a
calibration reference, or in any application where high accuracy
pressure measurement is required.
Many user configurable functions have been designed into the
BetaGauge PI including sampling rate, TARE, damping, auto shut off,
and min-max. Once the gauge is configured, settings can be locked
and password protected to prevent unauthorized changes to
configuration.
1.1 Customer Service
Corporate Office:
www.martelcorp.com
e-mail: sales@martelcorp.com
Tel: (603) 434-8179 800-821-0023 Fax: (603) 434-1653
Martel Electronics
PO Box 770
1F Commons Drive
Londonderry, NH 03053
1.2 Standard Equipment
Check to see that your BetaGauge PI has arrived intact. Batteries are
factory installed unless you have purchased the optional 24V powered
version, in which case batteries are not supplied or installed. Save the
packing materials at least until you have verified that there is no
concealed damage.
1.3 Safety information
A Warning identifies conditions and actions that pose hazard(s) to the
user; a Caution identifies conditions and actions that may damage the
Calibrator or the equipment under test.
2
Symbols Used
The following table lists the International Electrical Symbols. Some or all
of these symbols may be used on the instrument or in this manual.
Symbol Description
Power OFF
Power ON
Earth ground
Risk of Danger. Important information. Refer to manual.
Battery
Hazardous Voltage
Conforms to ATEX requirements
Conforms to relevant European Union directives.
Wheeled bin, conforms to EC directive 2002/96/EC
Hazard Location Information
Ex Hazardous Areas
An Ex-hazardous area as used in this manual refers to an area made
hazardous by the potential presence of flammable or explosive vapors.
These areas are also referred to as hazardous locations, see NFPA 70
Article 500.
Misuse
Should the BetaGauge PI be exposed to overpressure or sudden
physical shock (i.e. being dropped) it should be examined for any
damage that may cause a safety concern. If in doubt please return the
unit for evaluation to Martel Electronics. Please refer to the Customer
Service Section for contact information.
Caution
To avoid possible damage to calibrator or to equipment under test:
• If the message changes to "OL" the range limit is exceeded and the
pressure source must immediately be removed from the BetaGauge
PI to prevent damage to the pressure transducer inside.
• Maximum torque allowed is 13,5 Nm = 10 ftlbs. NEVER exceed the
torque allowed.
BetaGauge PI Display and Controls
Operation
Power: The standard BetaGauge PI is supplied with 3 AA batteries
installed. If you purchased the optional 24Volt powered version,
batteries are not installed. Connect a 24V power supply to the terminal
block on the rear of the gauge, noting proper polarity.
Do not install batteries when external power will be used.
Push the power button momentarily to turn the unit on. Push it again
to turn it off.
Set-up and configuration:
Push the CONFIG button to access the user-settable functions on the
gauge. Each time the CONFIG button is pressed; the display advances
3
Pressure display
Engineering Units
0 - 100% bar graph
Selects an action in
configuration.
Also turns the
back-light on/off
Turns Power on/off
Enters set-up and
configuration menus
Zeros the display,
Scrolls forward through
menu displays
Recalls min and max
readings.
Scrolls backwards
through menu displays
4
to the next function. Once a function has been set, press ENTER to
exit the configuration menu, or CONFIG to continue with further
configuration. In order, the configuration menu and operation is as
follows:
1. Engineering Units set. The unit is shipped configured to display
PSI. By pressing the ▲ and ▼ (ZERO and MAX/MIN) keys you
can scroll forward and backwards through the 18 standard
engineering units plus a one custom unit/scale. When the desired
unit is displayed, press ENTER or CONFIG. Pressure will now be
displayed in the chosen engineering units.
See the Specifications section of this manual for a list of available
engineering units. See the Supervisory Mode section for details on
setting up custom units.
2. Set Auto Off. The auto-shut off can be set in 1 minute increments
from 1 to 30 minutes or “off” (continuous operation). The unit is
shipped set for 30 minutes. Use the ▲ and ▼ keys to set the
desired interval. The “off” setting is at the low end of the choices,
below 1 minute.
3. Display battery voltage. Actual voltage and a percent of life
bargraph indicate battery condition
4. Display actual temperature. The BetaGauge PI is temperature
compensated, this displays the temperature measured by the
internal sensor. The value can be set to degrees F or degrees C
using the arrow keys.
5. Set damping. Choices are “on” and “off” set with the ▲ and ▼
keys. Turning damping on will smooth readings from pulsating
pressure sources.
6. Set sample rate: This determines how often pressure is sampled
and the display is updated. Choices are 0.5, 1, 3, and 10
samples/second. Note that 10/sec provides the fastest response
time.
7. Set TARE. This allows you to set a constant offset value, which is
then subtracted from the measured pressure. For example if a
TARE is set at 30 PSI, and the measured pressure is 37 PSI, the
displayed value will be 7 PSI.
A pressure of 27 PSI would be displayed as –3 PSI.
The tare value is set manually with the ▲ and ▼ keys, and is
based on the engineering units and resolution selected for display.
TARE value can be set to the maximum range of the gauge.
The bar graph will always display the actual pressure based on the
full range of the gauge regardless of the tare setting. This is done
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