Notes on the operating instructions
- The operating instructions are in-
tended for specialist workers and
trained personnel.
- Before each stage of work, read the
relevant notes and warnings care-
fully, and keep to the sequence as
stated.
- Pay particular attention to the sec-
tion on ”General safety warnings”.
If you have any problems or questions,
please contact your supplier or
consult KELLER directly.
1. Description of the device
General description
By means of the pressure pumps sup-
plied with the product, the medium
pressure calibrator enables the gene-
ration of pressures of -0,85 bar
relative (with the vacuum pump) to
+25 bar relative (with the hand pump).
The measurement technology incor-
porated into this device allows ac-
curate measurement and documen-
tation of the characteristic of a test
object that is connected to it. The
measured pressure progression can
be displayed, evaluated and saved
with a computer monitoring program
(CCS30).
The calibrator is operated with the
two function buttons SELECT and
ENTER, located directly below
the display. The calibrator itself is
powered by a 3,0 V battery, but power
can also be supplied externally via the
K-114A interface converter. Test ob-
jects (transmitters or pressure switch-
es) must be supplied from an external
source.
Pressure range for the display
The medium pressure calibrator has
a factory-set pressure zero point of
0 bar absolute (vacuum). The Zero
function allows any desired pressure
value to be set as the new zero point
reference.
To take relative measurements, the
medium pressure calibrator is zeroed
at ambient pressure (
Set Zero
). To re-
set the pressure zero point to absolute
pressure, use the
RES Zero
function
(reset zero).
Commissioning
A pressure-resistant connection for the
test object is required in order to use the
medium pressure calibrator. The pres-
sure connection for the test object is al-
ready screwed to the pressure distribu-
tor of the low-pressure calibrator so that
it is pressure resistant when it leaves
the factory, and it must not be dismant-
led. Recommended torque for the test
object pressure connection: 10 Nm
IMPORTANT!
Nothing must adhere to the surface of
the test object (no oil, grease, water,
etc). Impurities could pass through the
adapter to reach the medium pressure
calibrator and damage it.
Overpressure
If the pressure exceeds the measur-
ing range by more than 20%, the
measuring cell or the mechanism of
the medium pressure calibrator may
be destroyed.
Recalibration
The recalibration cycle depends on
the conditions of use. Recommended
recalibration cycle: 1 year.
Scope of delivery
- 1 calibrator
- 1 carrying case
- 1 vacuum pump
- 1 hose nipple
- 1 connection nipple, G 1/4”
- 2 sealing rings (G 1/8” + G 1/4”)
- 1 Y-coupler
- 1 CrNi filter
- 1 spare battery, type CR2430
(3.0 V)
- 1 set of operating instructions
- 1 test record (5 points)
- 1 USB interface converter,
K-114A
- 1 KELLER software CD
Intended use
The medium pressure calibrator
(MPX) may only be used to generate
positive or negative pressure with air.
Use of the calibrator with other me-
dia, especially hydraulic oil, will
damage it. The operational safety
of the device supplied is guaranteed
only if it is used as intended. The
limit values as stated (see page 19:
”Technical data”) must never be ex-
ceeded.
Before installing the medium pressure
calibrator, check that it is suitable for
your applications.
Scope of delivery
Medium pressure calibrator
14