PCE Instruments PCE-N24 Series User manual

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DIGITAL PANEL METER
N24 AND
N25 SERIES
USER’S MANUAL
PCE Americas Inc.
711 Commerce Way
Suite 8
Jupiter
FL-33458
USA
From outside US: +1
Tel: [phone]
Fax: [phone]
[email protected]
www.pce-instruments.com/english
www.pce-instruments.com
PCE Instruments UK Ltd.
Unit 11
Southpoint Business Park
Ensign way
Hampshire / Southampton
United Kingdom, SO31 4RF
From outside UK: +44
Tel: [phone]
Fax: [phone]
[email protected]

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Contents
1. APPLICATION .............................................................................5
2. METER SET .................................................................................5
3. OPERATIONAL SAFETY ............................................................6
4. INSTALLATION............................................................................7
4.1 Fixing Way ............................................................................7
4.2 External Connection Diagrams ..............................................8
5. SERVICE ...................................................................................10
5.1 Display Description .............................................................10
5.2 Messages after Switching the Supply on ............................10
5.3 Meter Configuration by Means of LPCon/eCon Program ..11
5.4 Manufacturer’s Parameters of N24S, N25S .. 12
5.5 Manufacturer’s parameters of N24T, N25T ... 12
5.6 Manufacturer’s Parameters of N24Z, N25Z .......13
5.7 Manufacturer’s Parameters of N24H, N25H ......14
6. ERROR CODES ........................................................................15
7. TECHNICAL DATA ...................................................................15
7.1 Technical Data of ..........................15
7.2 Technical Data of .................. 16
7.3 Technical Data of ..........................17
7.4 Technical Data of ..........................17
7.5 Common Technical Data
for the Whole N24 and N25 Series ...................18
8. ORDER CODES ........................................................................20
9. SERVICE AND MAINTENANCE ...............................................23

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1. APPLICATION
Meters of the N24 and N25 series are digital instruments destined
for the measurement of d.c. voltage or d.c. current: uni or bipolar,
temperature through J, K thermocouples, Pt100 resistance thermometers
and for the measurement of a.c. voltage and a.c. current. A LED display
(4 digits for N24 and 5digits for N25 meter series) constitutes the
readout field. The program is destined for the configuration
of N24 and N25 meter series. One must connect the meter with
the PC computer through the PD14 programmer.
ollowing parameters can be reprogrammed:
- thresholds of displayed overflows,
- precision of the displayed result (decimal point),
- measurement averaging time ,
- counting of indications (individual characteristic),
- automatic or manual compensation: cold junction temperature for
measurements with thermocouples, or wire resistance for Pt100
measurements (only in N24T and N24S meters).
All meters are galvanically separated between the supply, measuring
inputs and the programmer input
Protection grade from the frontal side: IP65.
Meter overall dimensions: 96 x 48 x 64 mm (with terminals).
2. METER SET
The set is composed of:
– Meter types: N24 or N25 ............................................1 pc
– User’s manual............................................................................1 pc
– Clamps to fix in the panel..........................................................4 pcs
When unpacking the meter, please check whether the type and exe-
cution code on the data plate correspond to the order. If equipment is

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incomplete or appears to be damaged, file immediately a claim with the
carrier and notify the sender at once.
3. BASIC REQUIREMENTS, OPERATIONAL
SAFETY
In the safety service scope, the meter meets the requirements of the EN
61010-1 standard.
Meaning of the symbol:
Caution: risk of hazard.
Observations concerning the operational safety
· All operations concerning transport, installation, and commissioning
as well as maintenance, must be carried out by qualified, skilled
personnel, and national regulations for the prevention of accidents
must be observed.
· The programming of N24 and N25 meter series
parameters must be carried out after disconnecting measuring circuits
· Before switching the meter on, one must check the correctness of
connections to the network.
·Do not connect the meter tothe network through an autotransformer.
· Before removing the meter housing, one must switch the supply off
and disconnect measuring circuits.
· The removal of the meter housing during the guarantee contract
period may cause its cancellation.
·The meter fulfills requirements related to electromagnetic compa-
tibility and can be us ed in the industrial electromagnetic environment
· When connecting the supply, one must remember that a switch or a
circuit-breaker should be installed in the building. This switch should be
located near the device, easy accessible by the operator, and
suitably marked as an element switching the meter off.
· Non-authorized removal of the housing, inappropriate use, incorrect
installation or operation, creates the risk of injury
to personnel or meter damage.
For more detailed information, please study the U ser’s Manual.

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Fig. 2. Overall dimensions
Fig. 1. Meter fixing
4. INSTALLATION
4.1. Fixing Way
The meter has separable strips with screw terminals which enable the
connection of external wires of 2.5 mm 2cross-section. In execution for
current measurement, the plug enables a permanent fixing to the so-
cket by means of screws. The meter is adapted to be mounted in a
panel by means of clamps, acc. to the fig. 1.
One must prepare a hole of 92+0,6 45+0,6 mm in the panel which the
thickness should not exceed 6 mm.
The meter must be introduced from the panel front with disconnected
supply voltage. Before the insertion into the panel, one must check the
correct placement of the seal. After the insertion into the hole, fix the
meter by means of clamps (fig.1).

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4.2. External Connection Diagrams
4.2.1 Electrical Connections of the N24S and
N25S Meters
Fig. 3. Electrical connection of the N24S, N25S meters
4.2.2 Electrical Connection of the PCE-N24T and PCE-
N25T Meter
Fig. 4. Electrical connection of the N24T, N25T meters
PCE-PD14
PCE-PD14

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Fig. 5. Connections of the N24T and N25 T measuring
inputs
Resistance thermometer in a
two-wire system and with
manual compensation
Resistance thermometer in a
three-wire system and with
automatic compensation
Thermocouple J, K
4.2.3 Electrical Connections N24Z, N24H and
N25Z, N25H Meters
Fig. 7. Electrical connections of N24Z, N25Z and
N24H, N25H meters for the current measurement.
Fig. 6. Electrical connections of N24Z, N24H and
N25Z, N25H meters for the measurement of voltage (and
frequency measurement only for the N24Z and N25Z
meters)
PCE-PD14
PCE-PD14

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5. SERVICE
5.1. Display Description
Fig. 8. Frontal panel
5.2. Messages after Switching the Supply on
After switching the supply on, the meter displays the meter name ap-
propriate to the kind of measured signal: N24e, N25E where Eis
the appropriate execution of the s,t,2,h . meter and next, the
program version in the shape rx.xx – where x.xx is the number of
the current program version or the number of a custom-made
execution. Till the time to obtain the required number of correct
measurements (acc. to the table 1 – for N24S, N24T,
N24H, N25S, N25T, N25H meters or acc. to the table
2 – for N24Z and N25Z meters) the arithmetical mean value
from until now measurements is displayed. The measurement of a value
Measured
value