Page 1
AN EXTRA MEASURE OF ACCURACY
All W&T Portable Pneumatic
Calibrators are subjected to rigorous and extensive testing. Each
has to perform at bet
ter than the
rated accurac
y to be accepted.
It’s accurate enough to double
as a shop standard.
Calibration traceable to NBS
Calibration is with primary standards
which are directly traceable to the German National
Bureau of Standards (PTB).
DESIGN AND CONSTRUCTION
The Series 65-120 Portable Pneumatic Calibrator is a
pressure-vacuum test stand wholly contained in a
carrying case. The front panel accommodates the
precision pressure gauge, all pressure connections,
two air-regulator controls, and a selector valve. With
the selector valve, three different test pressures can
be applied individually to the gauge. A fourth selector
setting vents the gauge to atmosphere.
The precision pressure gauge has a Ni-Span C, capsule-type pressure element which gives excellent
temperature stability and speed of response. An
almost frictionless mechanical linkage amplifies
capsule movement and transmits it to the pointer.
Although highly sensitive and accurate, the mechanism is built to withstand the handling normally associated with on-site calibration of pneumatic instrumentation.
A filter on the air supply keeps oil and moisture out.
Two regulators apply known pressures to the devices
under test. The connection block has
1
/8-inch femalepipe-threaded connections. Small gauges can be
threaded directly into the block; or as with larger
instruments, connected by flexible tubing.
The standard scale contains two sets of calibrations:
–100 to 0 to 850 inches of water and –3.6 to 0 to
30.6 psi.
Other ranges and units of calibration (from min.
0–4,5 psi
to max. 0–100 psi) are available.
The Series 65-120 Pneumatic Calibrator provides high-degree accuracy
for on-site testing and calibration service. This versatile portable test
stand combines precision measurement and durable construction in a
compact unit that is capable of simulating, applying, holding, regulating
and measuring both pressures and vacuum. The dial, all pressure connections, and the controls are panel-mounted for easy access.
Technical Information
FEATURES:
• Accuracy 0.066% FS
• Scale length 45 inches
(1140 mm)
• Clear readout
• Versatile capabilities
• Calibration traceable to NBS
• Easy to use
• DKD calibration on request
• Dual scale calibration for
standard range
PUBLICATION
TI 650.504DE
1
Portable Pneumatic
Calibrator
Series 65-120
Wallace & Tiernan GmbH
Postfach 1563, D-89305 Günzburg, GERMANY
Street address: Auf der Weide 10,
D-89312 Günzburg, GERMANY
Tel.: (49) 8221-9040, Fax: (49) 8221-904203
a U.S. Filter Company
DIN EN ISO 9001 certificated
DKD-Calibrations
(German Calibration Service)
NEW ACCURACY
AND
EXTENTED RANGES
WITH SERIES 1500
HIGH PERFORMANCE
GAUGE LINE
Page 2
Features
2
Clear, Accurate Readout
Sharply defined graduations, a 45-inch (1140 mm) scale length
over two pointer revolutions, and a knife-edge pointer facilitate
precise readouts. All scale calibrations are individually plotted
and hand marked to produce a dial custom fitted to the pressure element and mechanism of that gauge.
Connections for different Pressure readouts
For gauge pressure:
test pressure is applied to the capsule through the appropriate
P connection; the case is open to atmosphere through S.
For differential pressure:
high test pressure is applied to the capsule through the appropriate P connection. Low test pressure is applied to the case
through S.
For absolute pressure:
test pressure is applied to the capsule through the appropriate
P connection and the case is continuously subjected to full
vacuum through S.
For vacuum:
the capsule is open to atmosphere through connection P; the
case is connected to test vacuum at S.
For positive and negative pressures:
test pressure is applied to the capsule through the appropriate
P connection and the case is open to atmosphere through S.
Engineered for perfomance
The gauge housing is heavy cast aluminum with a tempered
glass dial cover. A built-in pressure-relief valve has a dumping
capacity which protects the case against overpressures to 10
times the maximum pressure rating. A separate pressure-relief
valve protects the capsule mechanism. The gauge is mounted
inside the carrying case on rubber-padded shock mounts. The
carrying case is constructed of strong but lightweight molded
ABS that flexes to absorb shock from impact.
Compact, built for on-site service
The W&T Portable Pneumatic Calibrator weights only 20 lb
(9 kg) and is only slightly larger than a attache case. The easy
portability, simple set-up, and the versatile capabilities of this
unit extends its usefulness for service in the field. Its portability
saves the time and expense of shop calibration.
W&T (top) and competitive scales of the same range.
Diff
Input
Input
to be
Read
Regulated
Output 2
Regulated
Output 1
Air
supply
Filter
Reg. Reg
.
P1P2P3S
P
1
P
2
P
3
Vent
1
2
3
4
5
6
7
8
9
10
1 Compartment for accessories
2 Differential Input
3 Input to be read
4 Regulated output no. 2
5 Regulated output no. 1
6 Air supply connection
7 Regulators
8 Selector Valve
9 Schematic flow diagram
10 Shock-mounted gauge
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The W&T Portable Calibrator eliminates the need for
special arrangements or external controls. The carrying case has a compartment for adapters, tubing, and
other accessories; the case cover is easily removed.
Complete information on the use of the calibrator is
given in an instruction book. A schematic flow diagram on the panel shows the calibrator’s connections
at a glance.
USES OF THE W&T PORTABLE
CALIBRATOR
Simplest use of the calibrator is to carry it to an onstream gauge, indicator, or recorder. Calibration of
such instruments can be quickly checked by making
simple connections without taking the instrument out
of service. Also, the calibrator can simulate the set
and process-variable signals to a pneumatic control
device and check its output. These three pressures
can be read out and checked in any order and in
rapid sequence. By evacuating the calibrator, absolute pressure measurements can be made.
PUBLICATION
TI 650.504DE
Calibrator Uses
3
Calibration of a pressure transmitter
Using a common supply pressure for both the calibrator and the transmitter, transmitter input is
regulated to the desired value and held. Transmitter output is accurately indicated by the calibrator.
Calibration of a gauge, indicator or recorder
Test pressure is applied to the instrument and to
the calibrator simultaneously. Instrument and calibrator readings are compared for an accuracy
check.
Calibration of a differential pressure transmitter
The transmitter’s supply and high-input pressures
are regulated to the desired values and held.
Transmitter output is indicated accurately by the
calibrator.
Calibration of a typical stacked diaphragm
pneumatic controller
Controller supply pressure is regulated to the desired value and held. Controller set and measured
inputs and output A are regulated to the desired
value and held. The calibrator then reads out controller output accurately. P3equals P2for any value
of P2if the controller is in calibration.
Calibration of a ratio relay
The ratio relay’s input and reference pressures are
regulated to the desired values and held. Relay
output is indicated accurately by the calibrator.
Pressure
Transmitter
3-15 psi output
Air supply
P1P
3
Input
Regulator
Supply
Regulator
500-psi gauge
supply
(May also be connected to P2)
Air supply
P
1
Low pressure input (atmosphere for test)
Differential
pressure
transmitter
supply
Air supply
High pressure input
3-15 psi output
P1P2P
3
Supply
Set
Input
Output A
Output B
Measured
Input
Air supply P1P2P
3
Output
Reference pressure if required
Air supply P
1P2P3
Ratio replay
Supply
Input
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Technical Data
PUBLICATION
TI 650.504DE
Ordering Numbers
The standard scale contains two sets of calibrations (dual scale) in the pressure units inches of water and psi. Dial
markings in the negative range are in red colour and in the positive range in black colour.
Range and Calibration Ordering No. Graduation
Outer scale: –100 to 0 to 850 65-120 000 1.0 inch water
inches of water (20 C)
Inner scale: –3.6 to 0 to 30.6 psi 0.05 psi
Other available ranges
Range and Calibration Ordering No. Graduation
0 to 4.5 psi (0 to 300 mbar) 65-120 005 0.005 psi (0.5 mbar)
0 to 10 psi (0 to 700 mbar) 65-120 010 0.01 psi (1 mbar)
0 to 15.5 psi (0 to 1 bar) 65-120 015 0.02 psi (0.001 bar)
0 to 20 psi (0 to 1.4 bar) 65-120 020 0.02 psi (0.002 bar)
0 to 30 psi (0 to 2 bar) 65-120 030 0.05 psi (0.002 bar)
0 to 45 psi (0 to 3 bar) 65-120 045 0.05 psi (0.005 bar)
0 to 60 psi (0 to 4 bar) 65-120 060 0.1 psi (0.005 bar)
0 to 100 psi (0 to 7 bar) 65-120 100 0.1 psi (0.01 bar)
Other units of calibration are available at no extra cost. Two sets of calibrations (dual scales) are available at extra
cost.
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Accuracy
0.066% of full scale
Repeatability
0.03% of full scale
Sensitivity
0.01% of full scale
Hysteresis
0.1% of full scale
Readability
0.02% of full scale
Temperature effect
Maximum is 0.1% of full scale per 10 C change
from 23 C
Scale length
45 inches (1140 mm) through 2 pointer revolutions
Dial diameter
8
1
/2inches (215 mm)
Capsule system volume
6.9 cc with pointer at zero; 8.6 cc, at full scale
Case volume
3070 cc
Case pressure
35 psi (2,5 bar) maximum
Overpressure protection
A pressure relief valve protects the mechanism
(capsule); pressure up to 90 psi will not damage the
mechanism nor affect accuracy. A built-in relief valve
and a flow restrictor protect the case from pressures
up to 10 times the case rating of 35 psig. This valve
is an emergency-protective device only.
Wallace & Tiernan GmbH
Postfach 1563, D-89305 Günzburg, GERMANY
Street address: Auf der Weide 10,
D-89312 Günzburg, GERMANY
Tel.: (49) 8221-9040, Fax: (49) 8221-904203
a U.S. Filter Company
Due to continual product development and improvement, certain specifications
may change without prior announcement.
12/98
Maximum case leak rate
Will not exceed 1.03 x 10–7std cc/sec or 0.018 psi/hr
Materials exposed to measured gas
Capsule system: Ni-Span C; soft solder; brass;
303 stainless steel; silver solder.
Case system: Ni-Span C; brass; phosphor bronze,
beryllium copper, magnesium, aluminum, nylon,
303 stainless steel; Elgiloy; soft solder, silver solder,
Hypalon.
Inlet manifold to pressure gauge; aluminum; brass;
polyethylene; copper; steel; glass wool; carbon;
Buna N.
Gauge case
Anodized aluminum with tempered-glass dial cover
Carrying case
ABS plastic 17
1
/2in. x 12 in. x 71/2in.
(445 x 305 x 190 mm)
Accessories
6 adapters for 1/8” pipe thread to 1/4” plastic tubing,
20 ft of 1/4” OD plastic tubing, instruction book,
sheet with summary of important instructions
Shipping weight
approx. 26 lb (12 kg); approx. 20 lb (9 kg) net
Note: Calibrator for use with non-corrosive gases.
It should not be used with liquids
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