PCE Instruments PCE-N25Z, PCE-N24Z, PCE-N24T, PCE-N24H, PCE-N24S Users guide

DIGITAL PANEL METER

N24 AND
N25 SERIES

PCE Americas Inc.
711 Commerce Way
Suite 8
Jupiter
FL-33458
USA
From outside US: +1
Tel: [phone]
Fax: [phone]
[e-mail]

www.pce-instruments.com/english

www.pce-instruments.com

PCE Instruments UK Ltd.

Southpoint Business Park

Hampshire / Southampton

United Kingdom, SO31 4RF

From outside UK: +44

Tel: [phone]

Fax: [phone]

[e-mail]

Unit 11

Ensign way

USER’S MANUAL

1

2

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

5.5 Manufacturer’s parameters of

5.6 Manufacturer’s Parameters of

5.7 Manufacturer’s Parameters of

6. ERROR CODES ........................................................................15

7. TECHNICAL DATA ...................................................................15

7.1 Technical Data of

7.2 Technical Data of

7.3 Technical Data of

7.4 Technical Data of

7.5 Common Technical Data
for the Whole

8. ORDER CODES ........................................................................20

N24 and N25 Series ...................18

N24S, N25S .. 12

N24T, N25T ... 12

N24Z, N25Z .......13

N24H, N25H ......14

..........................15

.................. 16

..........................17

..........................17

9. SERVICE AND MAINTENANCE ...............................................23

3

4

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
readout field. The
of
the PC computer through the

- 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

All meters are galvanically separated between the supply, measuring
inputs and the programmer input

N24 and N25 meter series. One must connect the meter with

ollowing parameters can be reprogrammed:

N24 and 5 digits for N25 meter series) constitutes the

program is destined for the configuration

PD14 programmer.

N24T and N24S meters).

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:

– User’s manual ............................................................................ 1 pc

– Clamps to fix in the panel ..........................................................4 pcs

When unpacking the meter, please check whether the type and exe­cution code on the data plate correspond to the order. If equipment is

N24 or N25 ............................................1 pc

5

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

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 to the 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

N24 and N25 meter series

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.

6

4. INSTALLATION

4.1. Fixing Way

The meter has separable strips with screw terminals which enable the

2

connection of external wires of 2.5 mm
current measurement, the plug enables a permanent fixing to the so­cket by means of screws. The meter is adapted to be mounted in a
panel by means of clamps, acc. to the fig. 1.

cross-section. In execution for

One must prepare a hole of 92
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).

+0,6

45

+0,6

mm in the panel which the

Fig. 1. Meter fi xing

Fig. 2. Overall dimensions

7

4.2. External Connection Diagrams

4.2.1 Electrical Connections of the N24S and

N25S Meters

PCE-PD14

Fig. 3. Electrical connection of the N24S, N25S meters

4.2.2 Electrical Connection of the PCE-N24T and PCE-

N25T Meter

PCE-PD14

8

Fig. 4. Electrical connection of the N24T, N25T meters

Thermocouple J, K

Resistance thermometer in a

two-wire system and with

manual compensation

Resistance thermometer in a

three-wire system and with

automatic compensation

Fig. 5. Connections of the N24T and N25 T measuring
inputs

4.2.3 Electrical Connections N24Z, N24H and
N25Z, N25H Meters

PCE-PD14

Fig. 6. Electrical connections of N24Z, N24H and

N25Z,

frequency measurement only for the

N25H meters for the measurement of voltage (and

N24Z and N25Z

meters)

PCE-PD14

Fig. 7. Electrical connections of N24Z, N25Z and

N24H, N25H meters for the current measurement.

9

5. SERVICE

5.1. Display Description

Measured
value

Fig. 8. Frontal panel

5.2. Messages after Switching the Supply on

After switching the supply on, the meter displays the meter name ap­propriate to the kind of measured signal: N24e, N25E where E is
the appropriate execution of the s,t,2,h . meter and next, the
program version in the shape r x.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

N24H, N25S, N25T, N25H meters or acc. to the table
2 – for
from until now measurements is displayed. The measurement of a value

N24Z and N25Z meters) the arithmetical mean value

10

N24S, N24T,

from behind the measuring range causes the setting of the overflow
and the beginning of the counting of correct measurements again.

The time is set by the manufacturer on 1 sec.

Table 1

Averaging time 0

Number of averaged
measurements

Updating of the value
on the display

5 s 1 s 3 s 5 s 10 s 15 s 20 s

2 7 20 33 67 100 133

0

5 s 0 5 s 0 5 s 0 5 s 0 5 s 0 5 s 0 5 s

Table 2

Averaging time 0 5s 1s 3s 5s 10s 15s 30s 1 m 2 m 5 m 7 m 12 m 15 m

Number of averaged
measurements

Updating of the va­lue on the display

126 10 20 30 60 100 100 100 100 100 100

0

5s 0 5s 0 5s 0 5s 0 5s 0 5s 0 5s 0 5s 0 5s 0 5s 0 5s 0 5s 9 1s

In case of any error occurrence or exceeding of the range value, one of

the message described in the section 6 will be displayed.

5.3. Meter Configuration by Means of the

LPCon

The free delivered LPCon program, available on the

for the PCE-N24 and PCE-N25 meter series configuration. The configuration
user’s manual for PCE-N24 and 25 meters by means of the LPCon
program is also available on the

The PCE-PD14 programmer is required for the configuration.

CAUTION!

The programming of meter parameters must be carried out

Program

page, is destined

page.

when measuring circuits are switched off!

11

5.4. Manufacturer’s Parameters of N24S

Table 3

Parameter description

Decimal point

Averaging time

Individual
characteristic

Parameter a of the in-
dividual characteristic

Parameter b of the in-
dividual characteristic

Upper overflow of the
measurement

Range/value (

N24/ N25)

0000, 000.0, 00.00,

0.000/00000, 0000.0,

000.00, 00.000,

0.0000

0.5 s; 1 s; 3 s; 5 s;
10 s; 15 s; 20 s;

disabled, enabled disabled disabled

-1999...9999/

-19999...99999

-1999...9999/

-19999...99999

-1999...9999/

-19999...99999

Manufacturer’s

value N24S

00.00 for U,I
unipolar;

000.0 for U
bipolar;

1 s 1 s

1 1

0 0

9999 99999

Manufacturer’s

value N25S

000.00 for U,I
unipolar;

0000.0 for U
bipolar;

Lower overflow of the
measurement

-1999...9999/

-1999 -19999

-19999...99999

5.5. Manufacturer’s Parameters of N24T

Parameter description

Decimal point

Averaging time

Individual
characteristic

Range/value (

N24/ N25)

0000, 000.0, 00.00,

0.000/00000, 0000.0,

000.00, 00.000,

0.0000

0.5 s; 1 s; 3 s; 5 s;
10 s; 15 s; 20 s;

disabled, enabled disabled disabled

Manufacturer’s

value

0000 for J

and K

thermocouples,

000.0 for Pt100

N24T

1 s 1 s

Manufacturer’s

value

00000 for J

and K

thermocouples,

0000.0 for Pt100

Table 4

N25T

Parameter a of the in-
dividual characteristic

12

-1999...9999/
1 1

-19999...99999

Parameter b of the in-
dividual characteristic

Automatic compensa­tion of terminal tempe­rature/wire resistance

Value of manual com­pensation: terminal
temperature/wire
resistance

-1999...9999/

-19999...99999

disabled, enabled disabled disabled

-20...60°C/0...20

0 0

40°C/0 40°C/0

Upper overflow of the
measurement
Lower overflow of the
measurement

5.6. Manufacturer’s Parameters of N24Z

and

Parameter description

Decimal point

-1999...9999/

-19999...99999

-1999...9999/

-19999...99999

N25Z Meters

Range/value (

N24/ N25)

0000, 000.0, 00.00,

0.000/00000, 0000.0,

000.00, 00.000,

0.0000

9999 99999

-1999 -19999

Manufacturer’s

value

000.0 for U,f

0.000 for I

N24Z

Manufacturer’s

value

0000.0 for U,f

Table 5

N25Z

0000.0 for I

Averaging time

Individual
characteristic

Parameter a of the in-
dividual characteristic

Parameter b of the in-
dividual characteristic

Upper overflow of the
measurement
Lower overflow of the
measurement

0.5 s; 1 s; 3 s; 5 s;
10 s; 15 s; 30 s;

1 s 1 s

1 min; 2 min; 5 min;

7 min; 12 min; 15 min

disabled, enabled disabled disabled

-1999...9999/
1 1

-19999...99999

-1999...9999/
0 0

-19999...99999

-1999...9999/

9999 99999

-19999...99999

-1999...9999/

-1999 -19999

-19999...99999

13

5.7. Manufacturer’s Parameters of N24H

Table 6

Parameter description

Decimal point

Averaging time

Individual
characteristic

Parameter a of the in-
dividual characteristic

Parameter b of the in-
dividual characteristic

Range/value (

N24/ N25)

0000, 000.0, 00.00,

0.000/00000, 0000.0,

000.00, 00.000,

0.0000

0.5 s; 1 s; 3 s; 5 s;
10 s; 15 s; 20 s;

disabled, enabled disabled disabled

-1999...9999/

-19999...99999

-1999...9999/

-19999...99999

Manufacturer’s

value

0000 for U

or 00.00 for I

bipolar

000.0 for U
unipolar

N24H

1 s 1 s

1 1

0 0

Manufacturer’s

value

0000.0 for U

or 000.00 for I

N25H

Upper overflow of the
measurement

Lower overflow of the
measurement

-1999...9999/
9999 99999

-19999...99999

-1999...9999/

-1999 -19999

-19999...99999

14

6. ERROR CODES

After switching the meter to the network on, messages about errors
can appear. Messages about errors and their reasons are presented
below.

Overflow of the upper value of programmed
indication range. In the option with Pt100, this

,

,

ErCA

ErEE

message also signals incorrect connections of
the wire to the terminal 4.

Overflow of the lower value of programmed
indication range.

Loss of meter calibration values. In such a case,
one must contact the service workshop.

Incorrect values in the meter configuration data.
One must set up again meter parameters by
means of the LPCon

program.

7. TECHNICAL DATA

7.1. Technical Data of N24S and
N25S Meters

Measuring range:

INPUTS:

Measuring range of voltage Un:

-11 mV...-10 mV...60 mV...66 mV

-66 mV...-60 mV...60 mV...66 mV
input resistance > 1 M

-0.5 V...0 V...10 V...11 V

-11 V...-10 V...10 V...11 V

Measuring range of current In:

-1 mA...0 mA...20 mA...22 mA input resistance 10

3.6 mA...4 mA...20 mA...22 mA input resistance 10

Basic error
(at manufacturer’s settings):

(0.2% of the range + 1 digit)

1%
1%

15

Output for supply external
transducers 24 V

Sustained overload 110% Un, 110% In

Short duration overload (1 s): voltage input 10 Un

current input 5 In

5% 30 mA

7.2. Technical Data of N24T and N25T
Meters

Measuring range:

INPUTS:

Pt100:

-50°C...150°C
current flowing through the sensor < 300

-50°C...400°C

Resistance of wires connecting

A

the resistance:

Temperature measurement
by thermocouple of J type: -50 °C...1200°C

Temperature measurement
by thermocouple of K type: -50 °C...1370°C

Basic error
(at manufacturer’s settings):

Additional errors in rated
operating conditions:

- compensation of cold junction

temperature changes

5 by wire for the automatic

compensation

10 by wire for the manual

compensation

(0.2% of the range + 1 digit)

0.2% of the range

- compensation of wire

resistance changes

Output for the supply
of external transducers 24 V

Short duration overload (1 s): inputs of sensors: 30 V

0.2% of the range

5% 30 mA

16

7.3. Technical Data of N24Z and N25Z meters

Measuring range:
INPUTS:

Measuring range of voltage Un:

1...100...120 V a.c.

2.5...250...300 V a.c. input resistance > 2 M

4...400...600 V a.c.

Measuring range of current In:

0.01...1...1,2 A a.c.

0.05...5...6 A a.c.

Measurement of frequency 20...500 Hz
(in voltage range 24...480 V) input resistance > 2 M

Basic error (at manufacturer’s settings):

- voltage and current:

- frequency:

Sustained overload 150% Un (only for 400 V input),

Short duration overload (1 s) voltage input 2 Un (< 1000 V),

input resistance 10 m
input resistance 2 m

(0.5% of the range + 1 digit)

in frequency interval 20...500 Hz

(0.02% of the range + 1 digit)

120% Un (for other Un),
120% In

current input 10 In

10%

10%

7.4. Technical Data of N24H and N25H
Meters

Measuring range:

INPUTS:

Measuring range of unipolar voltage Un:

0...100...110 V d.c.
input resistance > 2 M

0...250...275 V d.c.

17

Measuring range of bipolar voltage Un:

-120...-100...100...120 V d.c.

-300...

-600...- 400...400...600 V d.c.

Measuring range of bipolar current In:

-1.2...-1...1...1.2 A d.c. input resistance 10 m

-6...- 5...5...6 A d.c. input resistance 2 m

Basic error
(at manufacturer’s settings):

- voltage and current:

Sustained overload: 150% Un (only for

Short duration overload (1s) voltage input 2 Un (<1000 V)

-250...250...300 V d.c. input resistance > 2 M

10%

10%

(0.2% of the range + 1 digit)

400 V input),
120% Un (for other Un),
120% In

current input 10 In

7.5. Common Technical Data for the Whole
N24 and N25 Series

Rated operating conditions:

- supply voltage 230 V

110 V
24 V

85...253 V a.c. (45...65 Hz) or d.c.

20...40 V a.c. (45...65 Hz) or d.c.

- ambient temperature -10...23...55 °C

- storage temperature -25...+85°C

- humidity < 95% (condensation inadmissible)

- work position any

10% a.c. (45...65 Hz)
10% a.c. (45...65 Hz)

10% a.c. (45...65 Hz)

18

Additional errors in rated operating conditions:

- from

Averaging time (programmable) 0.5 s (by default 1 s)

Preheating time 30 minutes

Readout field:

- digit height

- colour

- indication range:

Ensured protection grade
from the frontal side: IP 65 acc. to EN 60529

Overall dimensions: 96 x 48 x 64 mm (with terminals)

ambient temperature changes (50% of basic error/10 K)

4-digit LED display (PCE-N24 series)
5-digit LED display (PCE-N25 series)

20 mm (PCE-N24)/14 mm (PCE-N25 series)

red

1999...9999 (PCE-

-

-19999...99999 (PCE-

N24 series)

N25 series)

Weight: < 0.25 kg

Input power < 6 VA

Galvanic isolation between:

- supply-measuring input 3.2 kV d.c.

Electromagnetic compatibility:

- noise immunity acc. to EN 61000-6-2

- noise emission acc. to EN 61000-6-4

Safety requirements acc. to EN 61010-1:

isolation between circuits: basic,
installation category III (for the 400 V option – category II),
pollution grade: 2,
maximal phase-to-earth working voltage:

- for the supply circuit: 300 V,

- for the measuring input 600 V – category II (300 V – cat. III)

- for the programming input: 50 V

altitude above sea level: < 2000 m,

19

8. ORDER CODES

Table 7

DIGITAL PANEL METER

Number of display digits:
four (
five (

Kind of input signal:

standard: voltage, current ................................... ........

temperature: thermocouples, resist. thermometers .....

a.c. signals .......................................................... ........

d.c. signals: high voltage, high current .......................

Input:

see table 8 .................................................................. .....

Supply:

230 V a.c. ..................................................................... ..... .....

110 V a.c. ..................................................................... ..... .....

24 V a.c. ....................................................................... ..... .....

N24 series) ............................................ 4

N25 series) ............................................. 5

N2X

X- X X XX XX X X

S
T
Z
H

X

1
2
3

85...253 V a.c./d.c. with supply output: 24 V/30 mA* ..............

20...40 V a.c./d.c. with supply output: 24 V/30 mA* ................

Units:

see table 9 .................................................................. ..... ..... .....

Version:

standard ..................................................................... ..... ..... ..... .....

non-standard settings ........................................ ........ ..... ..... ..... .....

custom-made **.................................................. ........ ..... ..... ..... .....

Language:

Polish .......................................................................... ..... ..... ..... ..... .....

English ........................................................................ ..... ..... ..... ..... .....

other** ................................................................ ........ ..... ..... ..... ..... .....

Acceptance tests:

without extra quality inspection requirements ... ........ ..... ..... ..... ..... ..... .....

with an extra quality inspection certificate ................. ..... ..... ..... ..... ..... .....

4
5

XX

00
NS
XX

P
E
X

0
1

acc. to customer’s request **...................................... ..... ..... ..... ..... ..... .....

* This output is only in

N2XS, and N2XT meters

** The code number is established by the manufacturer

20

X

Item

N24S/
N25S

METER TYPE

N24T/ N25T

N24Z/
N25Z

Table 8

N24H/ N25H

1 0...20 mA

2 4...20 mA

PT100: -50...150°C

PT100: -50...400°C

100 V a.c. +/- 100 V d.c.

250 V a.c. +/- 250 V d.c.

Thermocouple J:

3 0...60 mV

400 V a.c. +/- 400 V d.c.

-50 ... 1200°C

Thermocouple K:

4 0...10 V

1 A a.c. +/- 1 A d.c.

-50 ... 1370°C

5 ± 60 mV 5 A a.c. +/- 5 A d.c.

frequency

6 ± 10 V

0...100 V d.c.

20...500 Hz

7 0...250 V d.c.

Codes of printed units Table 9

Code Unit Code Unit

00
01
02
03
04
05
06
07

1)

– After agreeing with the manufacturer.

without unit

o

C

%

A
V

mV

mA

kA

08
09
10
11
12
13
14

XX

on order

kV
Hz

turns

rpm

bar

kPa

MPa

1)

21

EXAMPLES OF ORDER:

Example 1

The code:

N24Z – digital meter with four digits for a.c. signals,
2 – input signal: 250 V a.c. (acc. to the table 8),
1 – supply voltage: 230 V a.c.,

04 – with the unit: V (acc. to the table 9),
00 – standard version,

E – English language,

0 – without extra quality inspection requirements.

Example 2 (custom-made version)

The code:

N25S – digital meter with 5 digits for d.c. signals

– input signal: 0…20 mA (acc. to the table 8),

1
4 – supply voltage: 85…253 V a.c., with the 24 V/30 mA supply

N24Z - 2 1 04 00 E 0 means:

N25S - 1 4 02 XX E 1 means:

input for external transducers,

02 – with the unit: % (acc. to the table 9), with display indications:

0…100.0,

XX – custom-made, mentioned in the table 10,

E – English language,

1 – with an extra quality inspection certifi cate.

Example of additional information for non-standard settings

Parameter Range/value
Decimal point 000.00
Averaging time 1 s
Upper measurement overflow 99999
Lower measurement overflow -19999

Table 10

Individual characteristic enabled
Parameter a of the individual characteristic 5
Parameter b of the individual characteristic 0

22

9. MAINTENANCE AND GUARANTEE

The N24 and N25 digital panel meter series do not require
any periodical maintenance.
In case of some incorrect operations:

During the Guarantee Period:

One should take the meter down from the installation and

the anufacturer.

After the Guarantee Period:

One should
The disassembling of the casing causes the cancellation of the
granted guarantee.

Our policy is one of continuous improvement and
we reserve the right to make changes in design and
specifi cations of any products as engineering advances
or necessity requires and revise the above specifi cations
without notice.

.

23