Gossen MetraWatt MetraHit 28s, MetraHit 29s User Manual

METRA 28S and 29S
Precision Digital Multimeter, Pow er Meter

3-348-866-03

5/8.00

GOSSEN-METRAWATT GMBH

-Calibration Certificate

DQSCertifiedper

DIN EN ISO 9001 Reg. No.1262

QUALITY MANAGEMENT SYSTEM

Applications

METRAHitâ28S and 29S multimeters are high performance pre­cision instruments for the lab, service and training.
With a display range of 300,000 digits as well high level accuracy
and long-term stability, they fulfill all calibration and R&D labora­tory demands. Battery operation allows for on-site precision ser­vicing and calibration.

Features

Convenient Triple Display

The current measurement value, as well as two other values, are
updated and displayed, e.g. minimum and maximum value. The
usual switching back and forth between display values is no
longer necessary. Display resolution for the main display value can
be varied from 4¾ places for AC to 5¾ places for DC
(METRAHit

â

29S: from 2¾ to 5¾ places). The measurement rate,
adjustable from 1 ms to 0.5 s, allows for high-speed recorder,
precision data logger and mean value recorder functions with the
help of METRAwin

â

10/METRAHitâ (optional PC software).

High Resolution and Precision

5¾ places, or 309,999 digits, allow for cost effective calibration of
tested devices and components, as well as precise reference
measurements.

Effective Value for Distorted Waveforms

The implemented measurement process provides for effective
value measurement (TRMS) independent of the waveform up to
100 kHz.

Additional Functions

Continuity testing with acoustic signal, event counting (number of
events and event durations), counts zero crossings, stopwatch,
data comparison and wide-range capacitance measurement. The
integrated temperature measurement function allows for the con­nection of thermocouples and platinum resistance thermometers.

Overload Protection

The instrument is protected from overload in the voltage range.
Acoustic signalling occurs if measuring range lim its are exceeded.
The FUSE display indicates a defective fuse in the current range.

Calibration

METRAHit

â

28S and 29S multimeters are shipped with a
DKD calibration certificate. They can be automatically calibrated
with the CS92E calibration system via the RS232 data interface.

Infrared Measurement Data Transmission *

These devices include a serial, duplex data interface for remote
control and measurement value transmission via infrared light.

METRAHit

â

28S and 29S

• 300,000 digits and triple display

• Precision multimeter (V, dB, A, Ω, F, Hz, F, °C/°F)

• Current measurement with (clip-on) current transformer:
a transformation ratio of 1000:1 or 10000:1
is utilized for display purposes

• Integrated quartz movement
for recording of MIN/MAX values relative to real-time

•AUTOSELECT
automatic measured quantity recognition (V, Ω and F)

METRAHit

â

29S

• Power and energy measurements (W, VAr, VA, Wh, PF)
with analog signals or energy measurement with pulses,
current measurement value, mean values and peak
power values are displayed

• Power disturbances recording

• Large, 128 kB measurement value memory

METRA 28S and 29S
Precision Digital Multimeter, Pow er Meter

2 GOSSEN-METRAWATT GMBH

Automatic Blocking System (ABS) *

Automatic blocking of connector sockets prevents incorrect con­nection of measurement cables, and selection of incorrect mea­suring quantities. Thus hazards for the operator, the instrument
and the system are substantially reduced, and in many cases
entirely eliminated.

Automatic Measurement Value Storage *

The DATA HOLD function allows for storage of the digitally dis­played measurement value. A patented process assures that the
actual measurement value, and not random values, are stored
when rapid measurement magnitude changes occur. The stored
measurement value appears at the digital display.

* Protected by patent

Sampling Rate

The sampling rate determines the time interval after which the
respective measurement value is transmitted to the interface, or
saved to measurement value memory.
Depending upon the measured quantity, sampling rates can be
set in steps of 1, 2 or 5 from 0.05 s to 10 min.

Additional Functions, METRAHitâ29S

Power Measurement

The METRAHitâ29S is a compact high performance measure­ment instrument for direct and alternating current for single and
three-phase current measurements. The curr ent path can be con­nected directly, or with a clip-on current transformer. If a current
transformer is connected to the multimeter (mA or A input), all
current and power displays appear with the correct value in
accordance with the selected transformation ratio. The utilized
current transformer mu st have a tran sforma tion ratio of 1000:1 or
10,000:1.
Universal power measuring functions include the mea surement of
active, reactive, and apparent power, as well as power factor and
energy .
Furthermore, mean and peak values (e.g. a 15 minute max. value)
can be measured during a predefined period of time. Type
WZ12D, Z3511, Z3512 and Z3514 current clips are suitable for
use with the instrument.

Power Disturbance Recording

The instrument is capable of continuously recording line voltage
and power disturbances. The following power disturbances can
be acquired: violation of predetermined limit values, power failure
and positive or negative pulses. Each of these events is stored to
memory and can be queried at a later point in time. The type of
event, the time of its occurrence and its duration (except for
pulses) are displayed.

If memory mode is deactivated, approximately 250 events can be
stored to volatile memory and read out at the display.
These data remain in storage until the instrument is switched to a
different operating mode.
If memory mode is activated, the events are recorded at the instru­ment as a non-compressed data file which is uploaded to a PC at
a later point in time.

Memory Mode

The instrument is equipped with a 128 kB measurement value
memory which is synchronized with a quartz movement, and
which has room for 13,000 to 60,000 measurement values
depending upon configuration. Data can be stored to intermedi­ate memory or uploaded directly to a PC. The system records
data relative to real-time which allows for use as a real time data
logger.
Depending upon the measured quantity, sampling rates can be
adjusted in steps of 1, 2 or 5 within a range of 0.5 ms to 10 min.
Selected measurement values can also be stored to memory by
pressing a key.

The contents of the memory can be read out with the help of a
PC which has been connected to the multimeter via the
METRAHit

â

BD232 IR adapter, and with METRAwinâ10/

METRAHitâ analysis software.

Applicable Regulations and Standards

Standard Equipment

1 Multimeter
1 Protective case for operation under adverse conditions.

A cover made of pliable rubber including support bar protects
the device from damage due to impacts and falls. The rubber
material assures a secure stance for the instrument even on

vibrating surfaces.
1 KS17 cable set
2 Batteries
1 Operating Instructions
1 DKD calibration certificate

Guarantee

3 years material and workmanship
1 ... 3 years (depending on application) for calibration

IEC 61010-1
DIN EN 61010 Part 1
VDE 0411-1

Safety regulations for electrical measurement, control,
regulating and laboratory devices

DIN 43751 Digital measuring instruments
DIN EN 50081 Part 1

Generic standard for interference emission;
residential, business and light industry

DIN EN 50082 Part 1

Generic standard for interference immunity;
residential, business and light industry

VDI/VDE 3540 Reliability of me asurement, control and reg ulating devices
DINEN60529

DIN VDE 0470 Part 1

Test instruments and procedures
– level of protection provided by enclosures (IP code)

GOSSEN-METRAWATT GMBH 3

METRA 28S and 29S

Precision Digital Multimeter, Power Meter

METRAHitâ28S and 29S Characteristic Values

1)

Display: 5¾ places for DC, 4¾ places for AC,
other resolution and sampling rates can be selected for storage and transmission
in the rAtE menu.

2)

Stopwatch; format: mm:ss:hh,
where m=minute, s=second and h=hundredth second, max.: 99:59:59

3)

Lowest measurable frequency
with sinusoidal measurement signal symmetric to zero point

4)

at 0 ° ... + 40 °C

5)

Values < 100 digits are suppressed, 16 ... 45 ... 65 Hz ... 100 kHz sine.
See page 4 for influences.

6)

12 A – 5 min, 16 A – 30 s

7)

ZERO is displayed when the “Zero Balancing” function is active.

8)

Range 300mV : UE=50mV

eff/rms

. . . 300mV

eff/rms

3V :UE=0,3V

eff/rms

. . . 3 V

eff/rms

30 V : UE=3V

eff/rms

. . . 30 V

eff/rms

300 V : UE=30V

eff/rms

. . . 300 V

eff/rms

1000 V : UE=300 V

eff/rms

. . . 1000 V

eff/rms

for voltages > 100 V: power limiting at 3 · 106V · Hz

9)

Plus sensor deviation

10)

Without integrated reference junction:
inherent deviation

±2K

11)

For U > 10% of the measuring range

Key: D = Digit

Meas.

Function

Measuring Range

Resolution at

Measuring Range Upper Limit

Input Impedance

Inherent Deviation at highest resolution

under reference conditions

Overload Capacity

4)

Meas.

Function

±(...% of rdg. + ... %

of range + ... D)

±(...% of rdg. . + ... D)

300000

1)

30000 1)3000

1)

— —

5)

Value Duration

V

300 mV 1 µV10µV>20MΩ 5MΩ // < 50 pF 0.02 + 0.005 + 5

10)

0.5 + 30
1050 V

DC
AC
eff

sine

cont.

V

3V 10µV100µV11MΩ 5MΩ // < 50 pF 0.02 + 0.005 + 5 0.2 + 30

30 V 100

µV1mV 10MΩ 5MΩ // < 50 pF 0.02+ 0.005 + 5 0.2 + 30

300 V 1mV 10mV 10M

Ω 5MΩ // < 50 pF 0.02+ 0.005 + 5 0.2 + 30

1000 V 10 mV 100 mV 10 M

Ω 5MΩ // < 50 pF 0.02+ 0.005 + 5 0.2 + 30

dB

see table following page — same as V — ± 0.1 dB

11)

dB

Volt. Drop, approx. for upper range limit B

— —

5)

A

300 µA 1 nA 10 nA 160 mV 160 mV 0.05 + 0.02 +5 0.5 + 30

0.36 A cont.

A

3 mA 10 nA 100 nA 160 mV 160 mV 0.05 + 0.01 + 5 0.5 + 30

20 mA
30 mA

100 nA 1

µA 170 mV 170 mV

0.02 + 0.01 +5

0.5 + 30

0.05 + 0.01 +5

300 mA 1

µA10µA 300 mV 300 mV 0.1 + 0.01 +5 0.5+ 30

3A 100

µA 110 mV 110 mV 0.2 + 0.05 + 5 0.5+ 30

10 A

6)

cont.

10 A 1 mA 350 mV 350 mV 0.2 + 0.05 + 5 0.5+ 30

Open-circuit voltage

Measuring current

at upper ranger limit

±(...% of rdg. + ... % of range + ... D)

Ω

300 Ω 1mΩ 0.6 V max. 250 µA 0.05 + 0.01 + 5

7)

500 V

DC
AC
eff

sine

10 min

Ω

3kΩ 10mΩ 0.6 V max. 45 µA 0.05 + 0.01 +5

7)

30 kΩ 100mΩ 0.6 V max. 4.5 µA 0.05 + 0.01 + 5

300 k

Ω 1 Ω 0.6 V max. 1.5 µA 0.05 + 0.02+ 5

3M

Ω 10 Ω 0.6 V max. 150 nA 0.1 + 0.02 + 5

30 M

Ω 100 Ω 0.6 V max. 15 nA 1 + 0.2 + 5

Ω

300 Ω 0.1 Ω max. 3 V max. 1 mA 1 + 0 + 3

Ω

300 mV 100 µV max. 3 V max. 1 mA 0.2 + 0 + 3

3V 100µV max. 3 V max. 1 mA 0.2 + 0 + 3

Discharge resistor U

0 max

±(...% of rdg. + ... % of range)

F

3nF 1pF 10MΩ 3 V 1.0 + 0.2

7)

500 V

DC
AC
eff

sine

10 min

F

30 nF 10 pF 10 MΩ 3 V 1.0 + 0.2

7)

300 nF 100 pF 1 MΩ 3 V 1.0 + 0.2

3

µF 1 nF 100 kΩ 3 V 1.0 + 0.2

30

µF10nF11kΩ 3 V 1.0 +0.2

300

µF 100 nF 2 kΩ 3 V 5.0 + 1

3000

µF1µF2kΩ 3 V 5.0 + 1

30000

µF1µF2kΩ 3 V 5.0 + 1

f

min

3)

±(...% of rdg. + ... D)

Hz

300.000 Hz 0.001Hz 1 Hz 0.05 + 1

8)

1000 V

cont.

Hz

3.00000 kHz 0.01 Hz 1 Hz 0.05 + 1

8)

1000 V

300.000 kHz 1 Hz 1 Hz 0.05 + 1

8)

300 V

30 V

100 min

2)

10 ms ±15 D

DC1000V

AC 750V

±(...% of rdg. + ... D)

°C/°F

Pt 100/

Pt 1000

– 200.0 ...
+100.0

°C

0.1

°C

0.5K+ 3

9)

500 V

DC
eff

sine

10 min

°C/°F

+ 100.0 ...
+850.0

°C

0.2% + 3

9)

K

NiCr-Ni

– 270.0 ...

+1372.0

°C

0.1

°C 0.7 + 3

9. 10)

1050 V

DC
eff

sine

J

Fe-CuNi

– 210.0 ...

+1200.0

°C

0.1

°C 0.8 + 3

9. 10)