MODEL PAXLI - PAX LITE CURRENT METERS &
MODEL PAXLV - PAX LITE VOLTMETERS
FOUR MULTI-RANGE UNITS COVER:
199.9 A to 1.999 A *, 199.9 mV (AC or DC)
1.999 V to 300 V (AC or DC)
3 1/2-DIGIT, 0.56" (14.2 mm) HIGH RED LED DISPLAY W/POLARITY
BUILT-IN SCALING PROVISIONS
SELECTABLE DECIMAL POINT LOCATION
AUTO ZEROING CIRCUITS
OVER-RANGE INDICATION
NEMA 4X/IP65 SEALED FRONT BEZEL
OPTIONAL CUSTOM UNITS OVERLAY W/BACKLIGHT
U
R
C
L
US LISTED
IND. CONT. EQ.
51EB
Accessory Shunts Available For Higher Current Ranges.
*
Bulletin No. PAXLI/V-E
Drawing No. LP0566
Released 10/10
GENERAL DESCRIPTION
PAX Lite Current and Volt Meters are premium quality instruments designed
for tough industrial applications. With multi-range capability, built-in provision
for scaling, and DIP switch selectable decimal points, these meters offer the
ultimate in application flexibility. Four models cover your voltage and current
indicator needs. The meter can provide direct readout from pressure, speed or
flow transducers, or any other variable that can be translated to voltage or
current. The built-in scaling allows the display to be scaled to the desired
engineering unit.
The 3 ½ -digit bi-polar display (minus sign displayed when current or voltage
is negative) features a 0.56" high, 7-segment LEDs for easy reading. The meter
is also available with custom units label capability. Using the PAX label kit
(PAXLBK30), the selected label is installed behind the panel, keeping it safe
from washdown or other environmental conditions. A DIP switch is used to
control the backlight for the units label.
The meters have a NEMA 4X/IP65 sealed bezel and extensive testing of
noise effects to CE requirements, allowing the meter to provide a tough yet
reliable application solution.
CAUTION: Risk of Danger.
Read complete instructions prior to
installation and operation of the unit.
DIMENSIONS In inches (mm)
CAUTION: Risk of electric shock.
Note: Recommended minimum clearance (behind the panel) for mounting clip installation is
2.1" (53.4) H x 5.0" (127) W.
SAFETY SUMMARY
All safety related regulations, local codes and instructions that appear in the
literature or on equipment must be observed to ensure personal safety and to
prevent damage to either the instrument or equipment connected to it. If
equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.
DEFINITION OF TERMS
INSTALLATION CATEGORY (overvoltage category) I, (CAT I):
Signal level, special equipment or parts of equipment, telecommunication,
electronic, etc. with smaller transient overvoltages than Installation
Category (overvoltage category) II. (See IEC 664 & IEC 61010)
INSTALLATION CATEGORY (overvoltage category) II, (CAT II):
Local level, appliances, portable equipment, etc. with smaller transient
overvoltages than Installation Category (overvoltage category) III. (See
IEC 664 & IEC 61010)
1. DISPLAY: 3 1/2-digit, 0.56" (14.2 mm) high, 7-segment red LED, (-) minus
sign displayed when current or voltage is negative. Decimal points inserted
before 1st, 2nd, or 3rd least significant digits by DIP switch selection.
2. POWER: 115/230 VAC, switch selectable. Allowable power line variation
±10%, 50/60 Hz, 6 VA.
Isolation: 2300 Vrms for 1 min. between input and supply
Working Voltage: 300 V max. , CAT II
3. INPUT RANGES/RESOLUTION: (Selectable by jumper connections.):
AC VoltmetersAC Current Meters DC VoltmetersDC Current Meters
Note: Any individual range may be recalibrated (scaled) to 0.1% accuracy
with appropriate calibration equipment.
5. OVER-RANGE INDICATION: on all modes is indicated by blanking 3
least significant digits.
6. MAX. VOLTAGE ON LOWEST INPUT RANGE: 75 VAC or DC (Both
voltmeters and current meters).
7. MAX. VOLTAGE ON TERMINAL BLOCK: 300 VAC or DC (Both
voltmeters and current meters).
8. MAX. CURRENTS (FOR CURRENT METERS):
199.9 μA through 19.99 mA: 10 times max. range current
199.9 mA: 1 A
1.999 A: 3 A
Caution: In circuits where fault currents can exceed the maximum shunt
current, a fast-blow fuse should be installed in series with the input signal.
Otherwise, a slow blow 10 amp fuse is recommended that will allow for
start-up over current situations, while still protecting the instrument.
9. TEMPERATURE COEFFICIENTS:
Current meters Voltmeters
DC:
AC:
10. ENVIRONMENTAL CONDITIONS:
Operating Temperature: 0° to 60 °C
Storage Temperature: -40° to 80 °C
18. CONSTRUCTION: This unit is rated for NEMA 4X/IP65 outdoor use.
Installation Category II, Pollution Degree 2. One piece bezel/case. Flame
resistant. Panel gasket and mounting clip included.
19. WEIGHT: 0.65 lbs. (0.24 Kg)
ACCESSORIES
UNITS LABEL KIT (PAXLBK)
Each meter has a units indicator with backlighting that can be customized
using the Units Label Kit. The backlight is controlled by a DIP switch.
EXTERNAL CURRENT SHUNTS (APSCM)
To measure DC current signals greater than 2 ADC, a shunt must be used. The
APSCM010 current shunt converts a maximum 10 ADC signal into 100.0 mV.
The APSCM100 current shunt converts a maximum 100 ADC signal into 100.0
mV. The continuous current through the shunt is limited to 115% of the rating.
3
1.0 INSTALLINGTHE METER
-.00
(92 )
-.0
+.8
3.62
+.03
(45 )
1.77
-.0
+.5
-.00
+.02
3
5
4
1
2
ON
Installation
The PAX meets NEMA 4X/IP65 requirements when properly installed. The
unit is intended to be mounted into an enclosed panel. Prepare the panel cutout
to the dimensions shown. Remove the panel latch from the unit. Slide the panel
gasket over the rear of the unit to the back of the bezel. The unit should be
installed fully assembled. Insert the unit into the panel cutout.
PAN EL
BEZEL
PAN EL
GASKET
LATCHING
SLOTS
PAN EL
MOUNTING
SCREWS
PAN EL
LATCH
LATCHING
TAB S
While holding the unit in place, push the panel latch over the rear of the unit
so that the tabs of the panel latch engage in the slots on the case. The panel latch
should be engaged in the farthest forward slot possible. To achieve a proper seal,
tighten the latch screws evenly until the unit is snug in the panel (Torque to
approximately 7 in-lbs [79N-cm]). Do not over-tighten the screws.
Installation Environment
The unit should be installed in a location that does not exceed the maximum
operating temperature and provides good air circulation. Placing the unit near
devices that generate excessive heat should be avoided.
The bezel should be cleaned only with a soft cloth and neutral soap product.
Do NOT use solvents. Continuous exposure to direct sunlight may accelerate the
aging process of the bezel.
PANEL CUT-OUT
2.0 SETTINGTHE JUMPERSAND SWITCHES
The meter has an input jumper and switches, which must be checked and/or
changed prior to applying power. To access the input jumper and switches,
remove the meter base from the case by firmly squeezing and pulling back on
the side rear finger tabs. This should lower the latch below the case slot (which
is located just in front of the finger tabs). It is recommended to release the latch
on one side, then start the other side latch.
Power Selection Switch
Input Range Jumper
A jumper is used for selection of the voltage or current input range. Select the
proper input range that will be high enough to avoid input signal overload. It is
important that only one jumper position is used at a time. Avoid placing a jumper
across two different input ranges.
PAXLI Jumper Selection
Caution: Insure the AC power selection switch is set for the
proper voltage before powering the meter. The meter is shipped
from the factory in the 230 VAC position.
JUMPER SELECTIONS
The indicates factory setting.
INPUT RANGE JUMPER
ONLY ONE
JUMPER IN
THIS AREA!
REAR TERMINALS
CURRENT
±199.9µA
/199.9mV
±1.999mA
±19.99mA
±199.9mA
±1.999A
Set-Up DIP Switches
A DIP switch is located inside the meter. It is used for the selection of decimal
points, backlight annunciator, and scaling. Selecting the “ON” position enables
the function.
SWITCHFUNCTION
1Decimal Point 1 (000.0)
2Decimal Point 2 (00.00)
3Decimal Point 3 (0.000)
4Backlight Annunciator for Units Label
5Enables the Scaling Pot
FRONT DISPLAY
Main
Circuit
Board
SET-UP
DIP
SWITCHES
POWER SELECTION SWITCH
230
115
INPUT
RANGE
JUMPER
REAR TERMINALS
SCALING
POT
4
PAXLV Jumper Selection
3
5
4
1
2
ON
FRONT DISPLAY
Main
Circuit
Board
SET-UP
DIP
SWITCHES
SCALING
POT
230
115
POWER
SELECTION
SWITCH
INPUT RANGE
JUMPER
REAR TERMINALS
3.0 WIRINGTHE METER
WIRING OVERVIEW
Electrical connections are made via screw-clamp terminals located on the
back of the meter. All conductors should conform to the meter’s voltage and
current ratings. All cabling should conform to appropriate standards of good
installation, local codes and regulations. It is recommended that power supplied
to the meter (AC) be protected by a fuse or circuit breaker.
When wiring the meter, compare the numbers embossed on the back of the
meter case against those shown in wiring drawings for proper wire position. Strip
the wire, leaving approximately 0.3" (7.5 mm) bare lead exposed (stranded wires
should be tinned with solder). Insert the lead under the correct screw-clamp
terminal and tighten until the wire is secure. (Pull wire to verify tightness.)
EMC INSTALLATION GUIDELINES
Although this meter is designed with a high degree of immunity to ElectroMagnetic Interference (EMI), proper installation and wiring methods must be
followed to ensure compatibility in each application. The type of the electrical
noise, its source or the method of coupling into the unit may be different for
various installations. Listed below are some EMC guidelines for successful
installation in an industrial environment.
1. The meter should be mounted in a metal enclosure, which is properly
connected to protective earth.
2. Never run Signal or Control cables in the same conduit or raceway with AC
power lines, conductors feeding motors, solenoids, SCR controls, and
heaters, etc. The cables should be run in metal conduit that is properly
grounded. This is especially useful in applications where cable runs are long
and portable two-way radios are used in close proximity or if the installation
is near a commercial radio transmitter.
3. Signal or Control cables within an enclosure should be routed as far away as
possible from contactors, control relays, transformers, and other noisy
components.
JUMPER SELECTIONS
The indicates factory setting.
INPUT RANGE JUMPER
ONLY ONE
JUMPER IN
THIS AREA!
REAR TERMINALS
4. In extremely high EMI environments, the use of external EMI suppression
devices, such as ferrite suppression cores, is effective. Install them on Signal
and Control cables as close to the unit as possible. Loop the cable through the
core several times or use multiple cores on each cable for additional protection.
Install line filters on the power input cable to the unit to suppress power line
interference. Install them near the power entry point of the enclosure. The
following EMI suppression devices (or equivalent) are recommended:
Ferrite Suppression Cores for signal and control cables:
When the application requires direct voltmeter readout, the Scale Switch
should remain in the “OFF” position. The Input Range Jumper is set to the
voltage range being applied. It is possible to select a range higher than being
applied to get lower resolution. The Decimal Point switches are set to resolution
of the selected Input Range Jumper.
SCALING VOLTMETER READOUT
In many industrial applications, a voltmeter is required to display a reading
in terms of PSI, RPM, or some other unit of measure. The signal voltage being
measured can be generated by a transducer that senses the variations and
delivers a linear output voltage. To provide the desired readout at the specified
voltage, the voltmeter must be scaled.
Place the Scale Switch in the “ON” position. This enables the Scale
Potentiometer which is accessible from the back of the meter. (Enabling the
Scale Potentiometer does NOT affect the calibration of the meter.) Place the
Decimal Point Switches to the proper location. To properly set the Input Range
Jumper, the Division Factor must be determined by first using the below formula.
After the Division Factor is calculated, use the Division Factor Range Selection
Chart to choose the proper Input Range Jumper setting. Apply the meter power
and the voltage signal. Adjust the Scale Potentiometer to the desired value.
This scaling only effects the span. There is no offset scaling. This means that
only zero voltage can display a value of zero.
DIVISION FACTOR FORMULA:
VT x D.D.P.
D.R.
= D.F.
PAXLI
Current Signal (self powered)
Terminal 4: + Amps DC/AC
Terminal 3: - Amps DC/AC
DIVISION FACTOR RANGE SELECTION CHART
D.F. Use Input Position
0.1 to 1.2 Pos 1: 0-1.999 VDC
1.2 to 10.5 Pos 2: 0-19.99
10.5 to 100.5 Pos 3: 0-199.9
100.5 to 1300 Pos 4: 0-300
Note: Only one voltage jumper should be selected. Install the jumper before
the voltage signal is applied.
BLOCK DIAGRAM PAXLV
WHERE:
VT = Maximum Transducer Output
D.D.P = Display Decimal Point
D.F. = Division Factor
D.R. = Desired Reading
D.D.P.
0.000 = 1 The Display Decimal Point
00.00 = 10 (D.D.P.) is determined by
000.0 = 100 the desired decimal point
0000 = 1000 placement in the readout.
After the Division Factor for the application has been calculated, the proper
voltage range jumper can be selected. Use the “Division Factor Range Selection
Chart” to choose the proper jumper setting.
EXAMPLE: A relative humidity transducer delivers a 7.0 VDC voltage at a
relative humidity of 75%.
VT x D.D.P. = 7.0 x 1000
D.F. =
D.R. 75
= 93.3
This Division Factor is between 10.5 and 100.5, therefore jumper position 3
(199.9 V) is selected. The Scaling Potentiometer is then adjusted for the desired
readout at a known relative humidity.
6
PROCESS
CIRCUITRY
+VDC
S3 S2 S1S4
COMMON
+SIGNAL
0-199.9mA
0-19.99mA
1 Ω
9 Ω
S5
0-1.999mA
0-199.9µA/
90 Ω
900 Ω
POT
SCALE
.1 Ω
0-1.999A
1.9.9.9
199.9mV
PAXLI
DIRECT CURRENT METER READOUT
When the application requires direct current meter readout, the Scale Switch
should remain in the “OFF” position. The Input Range Jumper is set to the
current range being applied. It is possible to select a range higher than being
applied to get lower resolution. The Decimal Point switches are set to resolution
of the selected Input Range Jumper.
SCALING CURRENT METER READOUT
In many industrial applications, a current meter is required to display a
reading in terms of PSI, RPM, or some other unit of measure. The signal voltage
being measured can be generated by a transducer that senses the variations and
delivers a linear output voltage. To provide the desired readout at the specified
current, the current meter must be scaled.
Place the Scale Switch in the “ON” position. This enables the Scale
Potentiometer which is accessible from the back of the meter. (Enabling the
Scale Potentiometer does NOT affect the calibration of the meter.) Place the
Decimal Point Switches to the proper location. The Input Range Jumper is set
to the current range being applied. Apply the meter power and the current signal.
Adjust the Scale Potentiometer to the desired value. Scaling to obtain a
numerical readout higher than the normal value of the current can also be
accomplished, in most cases, by selecting a lower current range. However, the
maximum current for the range must not be exceeded. (See Specifications for
maximum input currents.)
This scaling only effects the span. There is no offset scaling. This means that
only zero amps can display a value of zero.
BLOCK DIAGRAM PAXLI
EXAMPLE: The Pax Current Meter has been connected to measure a circuit
current to 120.0 mA maximum. However, in this application, the display is to
indicate percent of load current with 120.0 mA equivalent to 100.0 percent.
The scale potentiometer is adjusted to reduce the normal 120.0 mA signal
input display reading of 120.0 to indicate the desired reading of 100.0 on the
display. Scaling to obtain a numerical readout higher than the normal value
of the current can also be accomplished in most cases by selecting a lower
current range. However, the maximum current for the range must not be
exceeded. (See Specifications for maximum input currents.)
5.0 TROUBLESHOOTING
PROBLEMREMEDIES
NO DISPLAYCHECK: Power switch and line voltage
CHECK: Input jumper position
INCORRECT DISPLAY
OVER-RANGE INDICATION
CHECK: Scaling adjustment pot DIP switch position
ADJUST: Scaling pot
VERIFY: Input Signal
CHECK: Input jumper position
VERIFY: Input signal
For further assistance, contact technical support at the appropriate company numbers listed.
6.0 CALIBRATION
The meter has been fully calibrated at the factory. Scaling to convert the input
signal to a desired display value is performed by enabling the scale pot DIP
switch. If the meter appears to be indicating incorrectly or inaccurately, refer to
Troubleshooting before attempting to calibrate the meter.
When recalibration is required (generally every 2 years), it should only be
performed by qualified technicians using appropriate equipment.
Input Calibration
with an accuracy of 0.01% or better and an external meter with an
accuracy of 0.005% or better.
Before starting, verify that the Input Range Jumper is set for the range to be
calibrated. Also verify that the precision signal source is connected and ready.
Allow a 30 minute warm-up period before calibrating the meter.
Then perform the following procedure:
1. Place jumper in 2 V range (PAXLV) or 2 mA range (PAXLI).
2. Set the DIP switch off to disable the scaling pot.
3. Apply half scale input signal.
4. Adjust calibration potentiometer as necessary for the display to read 1000
(ignore decimal point).
5. Apply zero signal and ensure display reads zero.
6. Apply full scale signal and ensure display reads 1999.
Note: Any individual range may be recalibrated (scaled) to 0.1% accuracy with
appropriate calibration equipment.
7
WARNING: Calibration of this meter requires a signal source
The Company warrants the products it manufactures against defects in materials and workmanship
LIMITED WARRANTY
for a period limited to two years from the date of shipment, provided the products have been stored,
handled, installed, and used under proper conditions. The Company’s liability under this limited
warranty shall extend only to the repair or replacement of a defective product, at The Company’s
option. The Company disclaims all liability for any affirmation, promise or representation with
respect to the products.
The customer agrees to hold Red Lion Controls harmless from, defend, and indemnify RLC against
damages, claims, and expenses arising out of subsequent sales of RLC products or products
containing components manufactured by RLC and based upon personal injuries, deaths, property
damage, lost profits, and other matters which Buyer, its employees, or sub-contractors are or may be
to any extent liable, including without limitation penalties imposed by the Consumer Product Safety
Act (P.L. 92-573) and liability imposed upon any person pursuant to the Magnuson-Moss Warranty
Act (P.L. 93-637), as now in effect or as amended hereafter.
No warranties expressed or implied are created with respect to The Company’s products except those
expressly contained herein. The Customer acknowledges the disclaimers and limitations contained
herein and relies on no other warranties or affirmations.
Red Lion Controls
Headquarters
20 Willow Springs Circle
York PA 17406
Tel +1 (717) 767-6511
Fax +1 (717) 764-0839
Red Lion Controls
Europe
Printerweg 10
NL - 3821 AD Amersfoort
Tel +31 (0) 334 723 225
Fax +31 (0) 334 893 793
Red Lion Controls
India
54, Vishvas Tenement
GST Road, New Ranip,
Ahmedabad-382480 Gujarat, India
Tel +91 987 954 0503
Fax +91 79 275 31 350
Red Lion Controls
China
Unit 101, XinAn Plaza
Building 13, No.99 Tianzhou Road
ShangHai, P.R. China 200223
Tel +86 21 6113-3688
Fax +86 21 6113-3683
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