Gossen MetraWatt METRA HIT 16I/L, METRA HIT 16T Operating Instructions Manual
Operating Instructions
METRA HIT⏐16I/L/T
Analog Digital Multimeter
with Insulation Measurement
3-348-892-02
9/5.06
METRA HIT 16I/L METRA HIT 16T
(1)
(5/5a) (5/5b)
(2)
(3/3a)
(4/4a)
(6)
(7)
(7a)
max. 600 V max. 600 V
(2)
(3)
(8)(8)
(10)
(9)
(20)
(19)
(18)
(17)
2 GMC-I Gossen-Metrawatt GmbH
(11) (12)
(16)
(13)
(14)(15)
Measuring Instrument Key
(1) LCD → chapter 4
(2) ON|OFF: Key to switch the instrument on and off →
chapter 2
(3) DATA|MIN/MAX: Key for storage of measured values and
MIN/MAX values → chapter 5 + chapter 6
(3a)
500V|1000V
: Key for test voltage selection → chapter
14.1
(4) AUTO| MAN → chapter 3
→
short: Key for manual measuring range selection
→ long: Activation of automatic measuring range
selection
(4a) + (5a) Continuous operation for insulation resistance
measurement →chapter 14.2
(5) FUNC: Multifunction key → chapter 7 ff.
→ short: Activation of measuring sub functions,
e.g. Hz,
, , °C (red symbols)
→ long: Activation of measuring main function
(white symbols)
(5a) Key for performing insulation resistance measurement
(as long as key is held) → chapter 14
(5b) Key for activating and deactivating → chapter 15
of insulation resistance measurement
(6) Rotary switch for measuring functions → chapter 7 ff.
(7)
Connector jacks for multimeter measurement → chapter
(7a) Connector jacks for insulation resistance measurement
→ chapter 14 + chapter 15
(8) DKD calibration mark → chapter 1
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3
LCD Key
(9) Symbol for indication of continuous operation
(10) Digital display with decimal point and polarity indication
(11) Display for manual measuring range selection
and storage of measurement and MIN/MAX values
(12) DC/AC display
(13) Unit of measurement display
(14) Overrange display
(15) Analog display pointer
(16) Analog display scale
(17 Display for violation of negative analog display range
(18) Unit of measure display, °C, for temperature
measurement
(Prerequisite: temperature sensor as accessory)
(19) Insufficient battery voltage display
(20) Acoustic warning active display
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Table of Contents
Page
1 Safety Features and Precautions ....................................5
2 Initial Start-Up ................................................................. 7
3 Selection of Measurement Functions
and Measuring Ranges ................................................... 8
3.1 Automatic Range Selection ................................................. 8
3.2 Manual Measuring Range Selection .................................... 8
3.3 Quick Measurements ......................................................... 8
4 LCD Display ..................................................................... 9
4.1 Digital Display ................................................................... 9
4.2 Analog Display .................................................................. 9
5 Measurement Value Storage, “DATA” ............................. 9
6 Minimum and Maximum Value Storage ........................10
7 Voltage Measurement ................................................... 11
7.1 METRA HIT 16I/L: 1 MΩ Input Impedance ........................ 11
7.2 METRA HIT 16T: Terminal Assignments ............................ 11
7.3 Transient Overvoltages ..................................................... 12
7.4 Measurement of Voltages Greater than 600 V ...................12
7.5 Duty Cycle Measurement only with METRA HIT 16L ........... 12
8 Resistance Measurement .............................................. 13
9 Alternating Current Measurement
with the WZ12B Clip-On Current Transformer .............. 13
10 Diode and Continuity Testing ........................................ 14
11 Capacitance Measurement ........................................... 15
12 Frequency Measurement ..............................................15
13 Temperature Measurement .......................................... 16
14 Insulation Resistance Measurement
with the METRA HIT 16I/L ............................................. 17
14.1 Preparation for Measurement ........................................... 17
14.2 Insulation Resistance Measurement .................................. 18
14.3 Conclusion of Measurement and Discharging .................... 18
14.4 Evaluation of Measurement Values ................................... 18
15 Insulation Resistance Measurement at Telecommunicati-
ons Equipment with the METRA HIT 16T ...................... 19
15.1 Evaluation of Measurement Values ................................... 20
16 RS232C Interface .......................................................... 20
17 Characteristic Values ................................................... 21
18 Maintenance ................................................................. 27
18.1 Battery ............................................................................ 27
18.2 Housing .......................................................................... 28
19 Accessories ................................................................... 28
19.1 General ........................................................................... 28
19.2 Characteristic Values of Measuring Cables
(Scope of Supply of Safety Cable Set KS17-2) ...................28
20 Repair and Replacement Parts Service
DKD Calibration Lab and Rental Instrument Service ..... 29
21 Warranty ........................................................................ 29
22 Product Support ............................................................ 29
4 GMC-I Gossen-Metrawatt GmbH
1 Safety Features and Precautions
You have selected an instrument which provides you with a high
level of safety.
This instrument fulfills the requirements of the applicable European
and national EC guidelines. We confirm this with the CE marking.
The relevant declaration of conformity can be obtained from GMC-I
Gossen-Metrawatt GmbH.
This analog-digital multimeter has been manufactured and tested in
accordance with safety regulations IEC 61010–1:2001/EN 61 010–
1:2001/VDE 0411–1:2002 und IEC 61557/EN 61 557/VDE 0413.
When used for its intended purpose (see definition below), safety of
the operator, as well as that of the instrument, is assured. Their
safety is however not guaranteed, if the instrument is used improperly or handled carelessly.
In order to maintain flawless technical safety conditions, and to assure safe
use, it is imperative that you read the operating instructions thoroughly and
carefully before placing your instrument into service, and that you follow all
instructions contained therein.
For y our safety, as well as for the protect ion of yo ur instr ument, the
multimeter METRA HIT 16 I/L are equipped with an automatic
socket blocking device. This is coupled to the rotary switch, and
only allows connection to the socket required for the selected function. It also prevents the switching of the rotary selector to disallowed functions when a measurement cable is plugged into a
socket.
Use for Intended Purpose:
– The multimeter described herein is a portable instrument which
can be held in one hand during measurements.
– Only such measurements are performed as described in chap-
ters 7 to 15.
– The measuring instrument including measuring cables and plug-
on test probes is only used within the measuring category indicated under the heading "Electrical Safety" on page 26 (refer to
the table on page 6 for the meaning of the measuring categories).
– The limits of the overload capacity may not be exceeded. Refer
to the Characteristic Values on page 22 and page 23 for the
duration and values of the overload capacity.
– Measurements are only performed within the specified ambient
conditions. Refer to page 27 for the operating temperature range
and relative humidity.
– The measuring instrument is only used in accordance with the
specified protection type, see page 27.
Observe the following safety precautions:
• The instrument may only be operated by persons who are capa-
ble of recognizing contact hazards and taking the appropriate
safety precautions. Contact hazards exist anywhere, where voltages of greater than 33 V may occur (effective value).
• Avoid working alone when taking measurements which involve
contact hazards. Be certain that a second person is present.
• The maximum allowable voltage between any given connector jack
(7) and earth is equal to 600 V cat. II or 300 V cat. I II. Overload
capacities are listed in chapter 17.
•The nominal voltage of the system must not exceed 600 V.
Perform voltage measurements only when switch is set to V ,
V or V .
• Be prepared for the occurrence of unexpected voltages at
devices under test (e.g. defective devices).
For example, capacitors may be dangerously charged.
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• Make certain that the measurement cables are in flawless condi-
tion, e.g. no damage to insulation, no interruptions in cables or
plugs etc.
• Special care is required when measurements are made in HF
electrical circuits. Dangerous pulsating voltages may be present.
• Measurements under moist ambient conditions are not allowed.
• Be absolutely certain that the measuring ranges are not overloaded
beyond their allowable capacities. Limit values can be found in the
table in chapter 17 „Characteristic Values“.
Measuring Categories and their Meaning per IEC 61010-1
CAT Definition
Measurements in electrical circuits
not directly connected to the mains system:
I
e. g. power systems in motor vehicles or aeroplanes, batteries ...
Measurements in electrical circuits
directly connected to the low-voltage system:
II
via plug, e.g. in households, offices, laboratories ...
Measurements in facility installations:
III
stationary consumers, distributor connections, devices attached to a
distributor
Measurements at the source of low-voltage installations:
IV
Meters, main terminal, primary overcurrent protection devices
The measurement category and the relevant maximum rated voltage (e. g. 300 V CAT I II) which are shown on the instrument casing
apply to your measuring instrument.
Meanings of Symbols on the Instrument
Warning concerning a point of danger
!
(Attention: observe documentation)
Earth
Continuous, doubled or reinforced
insulation
VDE testing authority approval mark
CSA approval mark
(North American test authority)
Indicates EC conformity
This device may not be disposed of with the
trash. Further information regarding the
WEEE mark can be accessed on the Internet
at www.gossenmetrawatt.com by entering
the search term ’WEEE’.
DKD calibration mark (red seal):
B0730
DKD-K-
19701
01-07
6 GMC-I Gossen-Metrawatt GmbH
Consecutive number
German calibration service calibration laboratory
GMC-I Gossen-Metrawatt GmbH calibration laboratory
Date of calibration (year – month)
Repair, Parts Replacement and Balancing
When the instrument is opened, voltage conducting parts may be
exposed. The instrument must be disconnected from the measuring circuit for repair, replacement of parts or balancing. If repair or
balancing of a live, open instrument is required, this may only be
carried out by trained personnel who are familiar with the dangers
involved.
Errors and Extraordinary Strains
If it may be assumed that the instrument can no longer be operated
safely, it must be removed from service and secured against unintentional use.
Safe operation can no longer be relied upon,
• if the instrument demonstrates visible damage,
• if the instrument no longer functions,
• after a long period of storage under unfavorable conditions.
2 Initial Start-Up
Battery
We have already installed a 9 V flat cell battery in accordance with
IEC 6 LR 61 into your instrument. The instrument is ready for operation. Refer to chapter 18.1 „Battery“, before placing your instrument into
service for the first time, or after it has been in storage.
Switch the Instrument On
➭ Press the ON |OFF key.
Activation is acknowledged with an acoustic signal. As long as
the key remains pressed, all segments of the liquid crystal display
(LCD) are active. The LCD is shown on page 2.
After the key is released, the instrument is ready for operation.
After the instrument has been switched off, it cannot be switched
back on for at least 3 seconds.
Note: Electrical discharge and high frequency interference can
cause incorrect displays, and may block the measuring sequence.
To reset, switch the instrument off, and then back on. If this procedure is unsuccessful, briefly disconnect the battery from the contact terminals.
Before opening the instrument, disconnect it from the measuring circuit
and refer to chapter 18 „Maintenance“!
Automatic Shut-Off
The instrument is switched off automatically if the measurement
value remains constant for a period of approximately 10 minutes
(measurement value fluctuation ≤±2 digits), and if none of the keys
or the rotary switch are activated during this time.
Disabling Automatic Shut-Off
The instrument can also be switched to “CONTINUOUS ON”.
Simultaneously press the ON|OFF key and the multifunction key FUNC
when switching the instrument on. The “CONTINUOUS ON” function is indicated at the LCD with the (8) symbol.
Switching the Instrument Off
Press the ON| OFF key.
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GMC-I Gossen-Metrawatt GmbH 7
3 Selection of Measurement Functions
and Measuring Ranges
METRA HIT 16I/L: The socket blocking device only allows for connection to the jacks which are required for the selected function.
3.1 Automatic Range Selection
The multimeter is equipped with automatic measuring range selection for all measuring ranges, except for 30 mV and 300 mV .
This automatic feature is active as soon as the instrument is
switched on. The instrument automatically selects the measuring
range which provides optimum resolution for the measured quantity.
The previously selected voltage measuring range remains active
after switching to the frequency measuring mode.
The instrument is automatically switched to:
– the next highest range at ± (3099 digits + 1 digit)
– the next lowest range at ± (240 / 280 digits – 1 digit)
3.2 Manual Measuring Range Selection
The automatic measuring range feature can be deactivated and the
ranges can be manually selected and locked in according to the following table.
The manual mode is deactivated by pressing and holding key
AUTO| MAN (approx. 1s), by activating the rotary switch or by switching the instrument off, and back on again.
When the instrument is switched back to automatic range selection
in the 30 mV or 300 mV ranges, the 3 V range is activated.
⇓
AUTO/
MAN (4)
Brief
V : 3V→ 30 V → 300 V → 600 V → 30 mV →
300 mV → 3V→ ...
V/:3V→ 30 V → 300 V → 600 V → 3V→ ...
Brief
Ω :30MΩ→ 30 Ω→ 300 Ω→ 3kΩ→ 30 kΩ→
300kΩ→ 3MΩ→ 30 MΩ ...
F : 30 nF1)→ 300 nF → 3 μF → 30 μF1)→ 30 nF1)...
Hz : 300 Hz → 3kHz→ 30 kHz → 100 kHz →300 Hz ...
Long Return to Automatic Range Selection — 2 x
1)
METRA HIT 16I/L only
Function
Manual Mode Active:
selected measuring range is fixed
switching sequence for:
Acknowledge
Display
MAN
(10)
MAN
(10)
Acoust.
Signal
1 x
1 x
3.3 Quick Measurements
If you wish to perform quicker measurements than those possible
with the automatic measuring range selection function, make sure
to establish the appropriate measuring range:
•by manual measuring range selection, i. e. by selecting the measur-
ing range with the best resolution, see chapter 3.2.
or
•via DATA function, see chapter 5. After the first measurement, the
proper measuring range will be automatically determined so that
measurements are performed more rapidly from the second
measured value onwards.
With both functions, the established measuring range is maintained
for the subsequent series mode measurements.
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4LCD Display
4.1 Digital Display
The digital display (9) shows the measurement value with correct
decimal point and sign. The selected unit of measure (12) and the
current type (11) are also displayed. A minus sign appears in front
of the value for zero-frequency quantities, if the positive pole of the
measured quantity is applied to the “⊥” input. “OL” is displayed if an
upper range limit of 3099 is exceeded (within range: 1999).
The digital display is refreshed twice per second for the measurement of V and Ω.
4.2 Analog Display
The analog display with pointer demonstrates the dynamic characteristics of a moving coil mechanism and is refreshed 20 times per
second for V and Ω measurements. The analog display is especially
advantageous for the observation of measurement value fluctuations and for balancing.
The analog display has its own polarity indicator. The negative
range of the analog scale (15) includes 5 graduations for the measurement of zero-frequency quantities, so that fluctuations around
zero can be observed. If the measurement value exceeds the display range the triangle at the left side (16) is first displayed, and
then, after about 0.7 s, polarity at the analog display is reversed.
Overranging (> 3099 digit, or > 1999 in the range) is indicated
with the triangle at the right side (13).
5 Measurement Value Storage, “DATA”
Measurement values can be automatically “frozen” with the DATA
function. This can be especially useful when contacting the measuring point with the test probes requires your full attention. After
the measurement value has been acquired and the appropriate
“condition” has been fulfilled according to the following table, the
measured quantity is frozen at the digital display and an acoustic
signal sounds. The test probes can now be removed from the measuring point and the measurement value can be read from the digital display (9). If the measurement value lies below the limit value
shown in the table, the instrument is reactivated for the storage of a
new value.
The DATA function has no effect on the analog display, from which
you can continue to read the current measurement value. However,
when the digital display has been frozen, the decimal point can no
longer be shifted. Thus if automatic measuring range selection has
been activated, you are no longer able to determine which measuring range is active for the analog display. Manual measuring range
selection is disabled, as long as the DATA function is active.
Function
DATA
Activate brief blinks 1 x
Store
Reactivate
Cancel long is deleted is deleted 2 x
1)
Reactivation when actual value falls below prescrib ed limit value
2)
Except for 30 mV and 300 mV ranges
⇓
DATA
MIN/MAX
(3)
1)
Condition Reaction at Instrument
Meas. Value
Measuring
Range
V
V
F, H z
F, H z
Limits
(digits)
2)
>280
Ω
<OL
>280
2)
<280
Ω
OL
<280
Value
Digital
is
displayed
stored
meas.
value
Display
DATA
is
displayed
blinks
Acoustic
Signal
1 x
GB
The DATA function is deactivated if you press an hold key
DATA|MIN/MAX (approx. 1 s), if the rotary switch is activated or if the
instrument is switched off and back on again.
GMC-I Gossen-Metrawatt GmbH 9
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