Ametek EPM 2023 User manual

User Manual/Bruger manual
EPM 2000 Series
Digital manometers/digitale manometre
Copyright 2000 AMETEK DENMARK A/S

105806 01 16-10-00

16-10-00 105806 01
............................................................ENGLISH
............................................................... DANSK

105806 01 16-10-00
The EPM 2000 Series

1/12 ENGLISH
List of contents
1.0 Introduction ............................................................................ 2
2.0 Operating the instrument....................................................... 5
2.1 Switch on/Switch off ......................................................................5
2.2 Back light.......................................................................................5
2.3 Symbol display ..............................................................................5
2.4 Overpressure.................................................................................6
2.5 MAX/MIN function .........................................................................6
2.6 Data hold .......................................................................................6
2.7 Selection of pressure units ............................................................6
2.8 Zeroing the EPM-2021 and the EPM-2023 ...................................7
2.9 Correction of ambient pressure EPM-2025...................................7
2.10 Average reading ............................................................................7
2.11 Manual selection of measuring range ...........................................8
3.0 Pump system .......................................................................... 9
3.1 General precautions ...................................................................... 9
3.2 Fitting of hand pumps and hoses ..................................................9
3.3 Pressure test process .................................................................10
3.3.1 Preparation of the test ....................................................10
3.3.2 Increasing pressure........................................................10
3.3.3 Declining pressure..........................................................10
4.0 Electrical specifications....................................................... 11
4.1 EPM-2021, EPM-2023 and EPM-2025 .......................................11
4.2 Batteries ......................................................................................11
5.0 Warranty................................................................................ 12

ENGLISH 2/12
1.0 Introduction
These operating instructions cover all models in the EPM 2000 Series.
Therefore, some of the options described may not apply to this
instrument. Please check the functions of the instrument you have
purchased before proceeding. If in doubt, the type designation will
appear on the display when the instrument is switched on.
Table of functions
Model EPM
2021
EPM
2023
EPM
2025
Differential / absolute Diff. Diff. Absolute
± input Yes Yes
7 different pressure units* Yes Yes Yes
Overpressure indication Yes Yes Yes
Data Hold Yes Yes Yes
Manual range selection Yes Yes Yes
MAX/MIN Yes Yes Yes
Density IP 65 IP 65 IP 65
Barometer Yes
* The EPM 2000 series offers the following units of pressure:
mbar, PSI, kPa, inHg, mHg, inH2O, mH2O
Table of pressure ranges
Model Operating range Max. overpressure
EPM-2021 130 mbar g / 52 ”H2O 1 bar g / 401 ”H2O
EPM-2023 7 bar g / 101,5 PSI 10 bar g / 145 PSI
EPM-2025 2 bar absolute 4 bar absolute

3/12 ENGLISH
Warning
Particular care should be taken not to overpressure
the instrument as this may damage the pressure
sensor inside the instrument. This is not covered by
the warranty.
NOTE:The differential/gauge instruments will only measure
positive pressures i.e. positive pressure applied to the
positive port, or negative pressure applied to the negative
port.
Instrument application
The range of EPM-2000 instruments is suitable for gauge, differential,
or absolute measurements over a wide range of pressures depending
on the type of instrument you have chosen.
They are not suitable for use with corrosive substances or cylic
hydrocarbons, e.g. motor oil, transmission fluid and freon. To use the
EPM-2000 with these components, isolation must be provided in form
of a separator.
Batteries
Two type AA batteries (Penlight) supplied.
Follow instructions on reverse of instrument for fitting/replacement.
When symbol appears on display, replace batteries.
Serial No.
The S/N of the EPM instruments is placed under the batteries. This will
secure that the number is not being removed by accident or by wear
and tear.
Table of units (conversion between different pressure units)
If possible, you should always use the pressure units available in the
EPM instrument. This will prevent conversion errors and make the use
easier and faster.

ENGLISH 4/12
Table of units
Units Bar mbar Pa kPa mmHg mH2O mmH2O PSI “H2O“Hg
1 Bar 1 1000 100000 100 750 10.197 10197.2 14.50 401.46 29.53
1 mbar 0.001 1 100 0.1 0.75 0.010197 10.197 0.0145 0.40146 0.02953
1 Pa 0.00001 0.01 1 0.001 0.0075 0.00010197 0.10197 0.000145 0.0040146 0.000295
1 kPa 0.01 10 1000 1 7.50 0.10197 101.97 0.145 4.0146 2.953
1 mmHg 0.001333 1.3332 133.32 0.13332 1 0.01360 13.60 0.019336 0.53524 0.03937
1 mH2O 0.09806 98.06 9806 9.806 73.556 1 1000 1.422 39.37 2.8959
1 mmH2O 0.000098 0.098 9.806 0.009806 0.073556 0.001 1 0.001422 0.03937 0.002895
1 PSI 0.0689 68.947 6894.8 6.8947 51.715 0.703 703.07 1 27.68 2.035
1 “H2O 0.00249 2.49 249 0.249 1.8683 0.0254 25.4 0.03613 1 0.07356
“Hg 0.03386 33.86 3386 3.3864 25.4 0.345316 345.316 0.49115 13.595 1

5/12 ENGLISH
2.0 Operating the instrument
2.1 Switch on/Switch off
Press to switch on and to switch off. The instrument
will automatically switch off after 12 min. unless MIN/MAX function is
activated.
If key is held when unit is switched on, the automatic switch off
function will be disabled.
2.2 Back light
Press and hold key . Light will be on as long as the key is held.
2.3 Symbol display

ENGLISH 6/12
2.4 Overpressure
If display shows OUT you should immediately remove the overpressure
from the instrument. Please also pay attention to pressure peaks, which
are not registered by the instrument.
2.5 MAX/MIN function
This function is activated by pressing the key. The instrument will
display the alternating ∧∨ symbols and the current reading. Press
again to show MAX maximum pressure reading and the ∧symbol will
be displayed. Press again to show MIN pressure reading and the ∨
symbol will be displayed. Press again to return to the actual pressure
display.
NOTE: Unit must be switched off to exit the MAX/MIN function.
2.6 Data hold
Pressing the key freezes the measurement value and the
symbol will appear on the display. Press once more to return to normal
display.
2.7 Selection of pressure units
Press the key to select required pressure units. Choose between
mbar/bar, PSI, kPa, inHg, mHg, inH2O and mH2O. This function cannot
be used in connection with the Data Hold and MAX/MIN functions.
These functions will be indicated in the display by the∧, ∨or
symbols.

7/12 ENGLISH
2.8 Zeroing the EPM-2021 and the EPM-2023
To eliminate any drift in sensor and electronics it is possible to zero set
the instrument. However, pressure on ± inputs of the EPM should be
removed first. Leave the inputs “open” which will secure the best
zeroing. Then press the key and the display will show 0 and the
chosen pressure unit.
2.9 Correction of ambient pressure EPM-2025
This mode enables correction of ambient pressure between 900 mbar
and 1100 mbar absolute. This mode is used together with a precision
barometer or similar. Make sure that the pressure input is “Open” to the
atmosphere. The instrument will show ambient pressure (barometer).
If you wish to adjust/change this, press , and the display will show
900 mbar (or the equivalent in other engineering units)
Press and hold . The display will now count upwards from 900 and
when required atmospheric pressure has been reached (max. 1100
mbar) release key. The subsequent measurements will now be
adjusted to your settings.
PLEASE NOTE: This setting will be lost, when the instrument is
switched off.
2.10 Average reading
This mode is suitable for measurement of reciprocating compressors or
other systems which have fast increasing or declining pressures. The
mode will show the average of the last 4 measurements. To activate
the mode, press the key and the symbol will appear on the
symbol display. Press the key once more to interrupt the mode
(instrument will return to MAX/MIN mode).

ENGLISH 8/12
2.11 Manual selection of measuring range
All instruments in the EPM-2000 series have a mode that enables
locking of the instrument in the upper measuring range. To start this
mode, press the key. A/R will now disappear from the symbol
display. To cancel this mode, press the key again and A/R will
reappear in the symbol display.

9/12 ENGLISH
3.0 Pump system
If you want to check/calibrate manometers, transducers or transmitters,
it is a good idea to use a hand pump to generate pressure for the test.
This pump can be delivered with all EPM systems, but may also be
purchased separately.
3.1 General precautions
When using pump systems, both Ametek’s and others, you should pay
attention to the following to avoid a lot of inaccurate measurements:
Air that is compressed becomes hot and will consequently expand.
Contrary to this, the temperature will decline, when the pressure is
reduced, which again will cause an increased reduction of the pressure.
To take this phenomenon into account, it is advisable to wait 15 to 20
seconds, before making any adjustment/ calibration. Also, it is
important not to bend, press or move the hose during test, as this will
change the volume of the hose and thereby the pressure.
3.2 Fitting of hand pumps and hoses
The instrument has been designed for pressure hoses with an inner
diameter of 4 mm and a wall thickness of 1 mm. The pressure hose is
fitted by unscrewing the clamping nut, sliding the hose on to the
stepped shaft and refitting the nut. Do not tighten fittings attached to
the pressure ports to a torque greater than 4 Nm otherwise the
pressure seals and the instrument will be damaged.
Connect pump and manometer using the T-piece. This leaves a free
”test port”, which can be used for your measurements. Typically,

ENGLISH 10/12
pressure indicators can be checked using an increasing pressure and
thereafter a declining pressure. This will give you the opportunity of
revealing any different readouts during increasing and declining
pressures. This is called hysteresis. To be able to achieve an exact
pressure, the pump has been provided with a volume adjuster which
enables fine adjustment of the pressure.
3.3 Pressure test process
3.3.1 Preparation of the test
Start connecting the hoses as described, including the pressure
indicator which has to be tested. Exhaust the system by turning the
release valve on the hand pump anti-clockwise and set the fine
adjustment threaded piston to mid range. Zero set the EPM if
necessary.
3.3.2 Increasing pressure
Close the release valve and apply pump action to the hand pump piston
to generate the required approximate pressure. Stop a little before the
required pressure is reached and use the fine adjustment to reached
the desired pressure. Repeat this for each desired calibration point.
3.3.3 Declining pressure
Open release valve with caution to let the pressure drop to a little above
desired pressure. Use the fine adjustment to reach desired pressure.
Repeat until all calibration points have been calibrated. Finally, the
system is vented using the release valve.
Warning
The hand pump may generate pressures higher than 7 Bar.
Therefore, please be careful not to expose the instrument
and the test object to over pressures.
For model EPM-2021, we recommend ONLY to use the fine
adjustment. Just a single stroke of the pump may bring the
pressure in excess of the measuring range (130 mbar) of the
EPM2021.

11/12 ENGLISH
4.0 Electrical specifications
4.1 EPM-2021, EPM-2023 and EPM-2025
Accuracies in the following operating ranges: (all specifications ±1
digit)
Ambient temperature specification
+20°C to +30°C ±(0,1% of reading +0,1% of measuring range
(F.S.))
-10°C to +50°C ±(0,15% of reading +0,15% of measuring
range (F.S.))
4.2 Batteries
Two type AA batteries (Penlight) enclosed.
Follow instructions on reverse of instrument for fitting/replacement.
Battery lifetime is approx. 200 hours, shorter if back light is applied.

ENGLISH 12/12
5.0 Warranty
AMETEK DENMARK A/S grants 2 year warranty from date of purchase
on material and workmanship. During the warranty period AMETEK
DENMARK A/S reserves the right to either replacing or repairing the
instrument at their discretion. This warranty does not cover damage or
failure resulting from misuse or accident.
Any modification, adjustment or any alteration of the instrument will
cause annulment of the warranty.
Any instrument to be repaired should be forwarded to the supplier,
carriage paid and at the owner’s risk. A brief description of the fault
should be included.
Serial No.
The serial No. of the EPM instruments is placed under the batteries to
secure that the number is not removed by accident or by wear and tear.

1/12 DANSK
Indholdsfortegnelse
1.0 Introduktion ............................................................................ 2
2.0 Betjening ................................................................................. 5
2.1 Tænd/sluk .....................................................................................5
2.2 Baggrundsbelysning......................................................................5
2.3 Symbol display ..............................................................................5
2.4 Overtryk.........................................................................................6
2.5 MAX/MIN funktion .........................................................................6
2.6 Data hold .......................................................................................6
2.7 Valg af trykenheder .......................................................................6
2.8 Nulstilling af EPM-2021 og EPM-2023 ..........................................7
2.9 Korrektion af omgivelsestryk EPM-2025 .......................................7
2.10 Visning af middelværdi..................................................................7
2.11 Manuelt valg af måleområde.........................................................8
3.0 Pumpesystem .........................................................................9
3.1 Generelle forholdsregler................................................................9
3.2 Montage af håndpumpe og slanger ..............................................9
3.3 Gennemgang af tryktest..............................................................10
3.3.1 Forberedelse til test........................................................10
3.3.2 Stigende tryk...................................................................10
3.3.3 Faldende tryk..................................................................10
4.0 Elektriske specifikationer .................................................... 11
4.1 EPM-2021, EPM-2023, og EPM-2025 ........................................11
4.2 Batterier.......................................................................................11
5.0 Garanti................................................................................... 12

DANSK 2/12
1.0 Introduktion
Denne brugsanvisning dækker alle modeller inden for AMETEK EPM
2000 serien. Det er derfor muligt, at nogle af funktionerne ikke
forefindes på Deres instrument. Inden ibrugtagning bør man derfor
checke, hvilke funktioner instrumentet er udstyret med. Er De i tvivl
om, hvilken type instrument De er i besiddelse af, kan De aflæse typen
på displayet, når instrumentet tændes.
Funktionsoversigt
Model EPM
2021
EPM
2023
EPM
2025
Differentiel / absolut Diff. Diff. Absolut
± indgange Ja Ja
7 forskellige trykenheder* Ja Ja Ja
Overtryksindikation Ja Ja Ja
Data Hold Ja Ja Ja
Manuelt områdevalg Ja Ja Ja
MAX/MIN Ja Ja Ja
Tæthedsgrad IP 65 IP 65 IP 65
Barometer Ja
* EPM 2000 serien har følgende trykenheder:
mbar, PSI, kPa, inHg, mHg, inH2O, mH2O
Oversigt over trykområder
Model Driftsområde Maksimalt overtryk
EPM-2021 130 mbar g / 52 ”H2O 1 bar g / 401 ”H2O
EPM-2023 7 bar g / 101,5 PSI 10 bar g / 145 PSI
EPM-2025 2 bar absolut 4 bar absolut

3/12 DANSK
Advarsel
Instrumenterne må ikke udsættes for overtryk, da
dette kan ødelægge tryksensoren internt i apparatet.
Dette er ikke dækket af fabriksgarantien.
BEMÆRK: Differentialmanometrene måler kun positivt tryk.
D.v.s. positivt tryk, når den med + mærkede indgang
benyttes, og negativt tryk, når den med ÷ mærkede
indgang benyttes.
Trykmålinger i praksis
Instrumenterne i EPM-2000 serien kan bruges til overtryks-,
differential- eller absolutte målinger, afhængig af hvilket instrument De
har valgt. Den gode linearitet gør dem anvendelige over et bredt
trykområde.
Instrumenterne er ikke egnede til brug i forbindelse med ætsende
substanser eller kulbrinter, f.eks. motorolie, gearolie eller freon. Hvis
EPM-2000 serien skal anvendes sammen med sådanne stoffer,
kræver det isolering i form af en separator.
Batterier
To type AA batterier (Penlight) medfølger.
Følg instruktionerne for montage/udskiftning på bagsiden af
instrumentet.
Udskift batterierne, når displayet viser symbolet.
Serienummer
EPM instrumenternes serie nummer er placeret under batterierne.
Dette sikrer, at nummeret ikke bliver fjernet utilsigtet ved brug og
slitage.

DANSK 4/12
Enhedstabel (konvertering mellem forskellige trykenheder)
Såfremt det er muligt, bør De dog altid bruge de i EPM instrumentet
tilgængelige trykenheder. Dette forhindrer omregningsfejl og gør
brugen nemmere og hurtigere.
Enhedstabel