Gossen Metrawatt METRAHIT CAL User guide

Operating Instructions
METRAHITCAL
Calibrator
3-349-442-03
11/12.15
Operating Overview – Connections, Keys, Rotary Switch, Symbols
1
3
4
14
5
6
12
10
2
12
9
13
7
Not a measurement input!
Do not apply interference voltage, except with current sink.
!
8
Increase parameter values
Mode menu:
3
ON / OFF | LIGHT
Selection of individual menu entries against direction of flow
, key for switching device and display illumination on and off
4 OUT | ENTER
OUT: Switch calibrator output on and off Mode menu: Acknowledge entry (ENTER)
Move cursor to the right
5
SELECT RANGE operating mode: ramp function selection
6 Rotary switch for calibration functions and complete shutdown 7 DAkkS calibration mark 8 Connector jacks for calibrator output 9 HOLD / CONT Pause/resume ramp/interval
Reduce parameter values
Mode menu:
Selection of individual menu entries in direction of flow
10 MEAS/ CAL | SETUP
Key for switching back and forth between calibration and menu function
11 ZERO/ SEL | ESC
Mode menu: Exit current menu level and
return to a higher level, exit parameters configuration without saving data. Pause ramp/interval.
Move cursor to the left,
12
SELECT RANGE operating mode: interval function selection 13 Power pack connector jack (accessory: NA X-TRA) 14 Infrared interface (accessory interface adapter:
USB X-TRA)
2 GMC-I Messtechnik GmbH
1 28
9
10
12
12
14
654 7
15
3
Battery full
Battery OK
Battery weak
Battery (almost) dead, U < 1.8 V
Data transmission to / from calibrator is active
IR interface in standby mode (ready to receive starting commands)
Battery Level Indicator
Interface Indicator (with selector switch setting ≠ OFF)
Symbols used in the Digital Display 1 Battery level indicator
2 NUM: Numeric entry of the output signal 3 INT: Interval sequence active 4 RAMP: Ramp function active 5 SINK: Current sink is active 6 SOURCE: Current source is active 7 ON: The calibrator output is active 8 IR: Infrared interface display
9 Auxiliary display with decimal point and polarity display 10 Main display with decimal point and polarity display 11 Calibration unit of measure 12 : Simulator in continuous mode operation 13 Ni/Pt1000: Selected temperature sensor 14 Auxiliary display with decimal point and polarity display
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Table of Contents
Page Page
1 Safety Features and Precautions ....................................................5
2 Initial Start-Up .................................................................................7
3 Voltage Source [V] ...........................................................................8
4
Frequency Generator (positive square-wave pulses) [Hz] ....................9
5 Resistance Simulation [Ω] ............................................................10
6 Temperature Simulation [°C / °F] ..................................................11
6.1 Temperature Simulation for Resistance Temperature Detectors – RTD setting for
temperature .................................................................................................12
Temperature Simulation for Thermocouples – TC Temperature Setting ...................12
6.2
7 Current Source and Current Sink [mA] ..........................................14
7.1 Current Sink – Simulation of a 2-Wire Transmitter ......................................... 15
7.2 Current Source ............................................................................................15
8 Interval Functions, Ramp Functions and Procedures ....................16
8.1 Interval Sequences – INT Function .................................................................16
8.2 Read-Out a Periodic Ramp – RAMP Function ..................................................19
9 Device and Calibration Parameters ...............................................21
9.1 Querying Parameters – InFo Menu ................................................................. 22
9.2 Entering Parameters – SETUP Menu ..............................................................22
9.3 Default Settings ............................................................................................23
10 Interface Operation (with selector switch setting ≠ OFF) ..............24
10.1 Activating the Interface ..................................................................................24
10.2 Configuring Interface Parameters ................................................................... 24
11 Technical Data ..............................................................................25
12 Maintenance .................................................................................29
12.1 Displays – Error Messages ........................................................................... 29
12.2 Batteries ...................................................................................................... 29
12.3 Fuses .......................................................................................................... 30
12.4 Housing Maintenance ................................................................................... 31
12.5 Return and Environmentally Sound Disposal ................................................... 31
13 Calibrator Messages .....................................................................31
14 Accessories ...................................................................................32
14.1 General ........................................................................................................ 32
14.2 Power Pack NA X-TRA (not included) ............................................................. 32
14.3 Technical Data for Measurement Cables
(scope of delivery: KS17 safety cable set) ....................................................... 32
14.4 USB X-
14.5 METRAwin90 Software .................................................................................33
TRA Bidirectional Interface Adapter ...................................................... 33
15 Repair and Replacement Parts Service
Calibration Center and Rental Instrument Service ........................34
16 Guarantee ......................................................................................35
17 Product Support ............................................................................35
18 Recalibration .................................................................................35
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1 Safety Features and Precautions

Attention!
!
Attention!
!
Note!
Warning!
You have selected an instrument which provides you with a high level of safety. This instrument fulfills the requirements of applica­ble European and national EC directives. This is confirmed by means of the CE mark. A corresponding declaration of conformity can be requested from GMC-I Messtechnik GmbH.
The device has been manufactured and tested in accordance with safety regulations IEC 61010–1:2010/DIN EN 61010– 1:2010/VDE 0411–1:2011. When used for its intended purpose, 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.
Observe the following safety precautions:
The instrument may only be operated by persons who are capable of recognizing contact hazards and taking the appro­priate safety precautions. Contact hazards exist anywhere, where voltages of greater than 33 V RMS may occur.
Make certain that the measurement cables are in flawless condition, e.g. no damage to insulation, no interruptions in cables or plugs etc.
For this reason, it is imperative that a calibrator is never confused with a multimeter.
If necessary, use a multimeter to make sure that no danger­ous contact voltages are present in the signal circuits to which the instrument is to be connected.
In order to prevent damage to the instrument, observe the
mum
allowable voltage and current values indicated at the jacks.
maxi-
With the exception of the resistance simulation and mA SINK operating modes, the connected signal circuits should not feed any voltage or current back to the calibrator. In order to avoid damage to the instrument when interference voltages are applied (within allowable limit values), the mA SINK and mA SOURCE circuits are equipped with an fuse, which makes this circuit highly resistive in the event that excessive current should occur in case of a fault for the duration of overloading.
If the calibrator is connected with reversed polarity, a high current may occur which trips the integrated fuse.
The calibrator has been designed for safe connection to signal circuits.
Maximum voltage to be applied between the connector jacks (8) is 27 V. If U
fuse is blown.
max
or I
is exceeded, the integrated 250 V
max
Please observe the following prior to connecting the DUT:
Switch on the instrument and adjust the correct calibrator function before connecting the DUT. Otherwise, a high cur­rent may flow through the DUT for a short while after power-on, thus interfering with the fuse test.
Be prepared for the occurrence of unexpected voltages at devices under test (e.g. defective devices). For example, capacitors may be dangerously charged.
Device functions may not be started in electrical circuits with
The instrument may not be operated in explosive atmo­spheres, or connected to intrinsically safe electrical circuits.
corona discharge (high-voltage).
GMC-I Messtechnik GmbH 5
Meanings of Symbols on the Instrument
!
Serial number
Registration number Date of calibraion (year – month)
German Accrediation Body GmbH – Calibration lab
XY123
2012-08
D-K-
15080-01-01
Warning concerning a source of danger (attention: observe documentation!)
Ground
Continuous, doubled or reinforced insulation
Indicates EC conformity
The 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.
DAkkS calibration mark (blue seal):
Opening of Equipment / Repair
The equipment may be opened only by authorized service per­sonnel to ensure the safe and correct operation of the equipment and to keep the warranty valid.
Even original spare parts may be installed only by authorized ser­vice personnel. In case the equipment was opened by unauthorized personnel, no warranty regarding personal safety, measurement accuracy, conformity with applicable safety measures or any consequential damage is granted by the manufacturer.
Repair, Parts Replacement and Balancing
When the instrument is opened, voltage conducting parts may be exposed. The instrument must be disconnected from the electri­cal circuit before the performance of repairs, the replacement of parts or balancing. If balancing, maintenance or repair of a live open instrument is required, work may only be carried out by trained personnel who are familiar with the dangers involved.
Defects 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 or the test probes are damaged
•If the instrument no longer functions
After long periods of storage under unfavorable conditions
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2 Initial Start-Up

Attention!
!
Note!
Battery operation
Be certain to refer to section 12.2 regarding correct battery installation.
As a result of internal battery voltage monitoring, the instrument may respond as follows if the battery charge level is low: – Cannot be switched on. – Shuts back down immediately. – Shuts back down if a load is connected to the output.
If this is the case, replace the batteries in accordance with section 12.2, or continue work with the power pack if possible.
Operation with the Power Pack (accessory, not included) Installed batteries are disconnected electronically if the NA X-TRA
power pack is used, and need not be removed from the instrument (see also section 12.2). If rechargeable batteries are used, they must be recharged externally.
Switching the Instrument On Manually
Move the rotary switch from OFF to any calibration function. or
Press the ON / OFF | LIGHT key if the rotary switch is not in the
OFF position.
Power-up is acknowledged with a brief acoustic signal. As long as the key is held depressed, all of the segments at the liquid crystal display (LCD) are illuminated. The LCD is shown in the diagram on page 3. After the key is released, the device is ready to execute calibration.
Switching the Instrument On with a PC
After transmission of a data frame from the PC, the simulator is switched on. See also section 10.1.
Electrical discharge and high frequency interference may cause incorrect displays to appear, and may disable the simulator. Switch the instrument off and back on again in order to reset.
If the problem persists, briefly dislodge the
battery from the connector contacts.
Setting Time and Date
See section 9.2 on page 22.
Switching the Instrument Off Manually
Press and hold the ON / OFF | LIGHT key until OFF appears at the
display. Shutdown is acknowledged with two, brief acoustic signals.
Complete shutdown of all functions including the IR interface
is accomplished by turning the rotary switch to OFF.
Automatic Shutdown of the Calibrator
The device is switched off automatically after the selected time with the AP oFF function (see section 9.2), has elapsed. Shutdown is acknowledged with a brief acoustic signal.
Automatic shutdown is disabled in the continuous operating mode (AP oFF = on).
Disabling Automatic Shutdown
The instrument can be set to continuous operation. Select AP oFF = on in the Setup menu (see section 9.2).
Continuous operation is indicated at the display with the symbol.
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3 Voltage Source [V]

Output
CALIBRATOR
+
+
Input
Device to be calibrated, e.g. measuring transducer
1kΩ
V
ON/OFF
LIGHT
ZERO/ SEL
ESC
OUT
ENTER
Voltages can be simulated within the following ranges: 0 … ±60 mV, 0 … ±300 mV, 0 3 V, 0 10 V and 0 15 V. Resistance of the connected circuit should not be any less than 1 kΩ.
Selecting a Voltage Range for the Fixed Value Function
Press the ZERO/ SEL | ESC key in order to switch to the
[select range] menu.
Select the desired voltage range with the  keys.
Acknowledge your selection with OUT | ENTER. The display is switched to the voltage value entry window, but the selected voltage range still appears in the auxiliary display.
Selecting the Voltage Range for the Interval or Ramp Function
Press the ZERO/ SEL | ESC key in order to switch to the
[
select range] menu. Select the desired voltage range with the
 keys.
Switch to the interval or ramp function menu with the 
keys (see section 8). Start the respective function by pressing OUT | ENTER.
Connect the device to be calibrated with the measurement
cable as shown.
Abbreviated Instructions
Select calibration function.
Select the V calibration function with the rotary switch. ➭ Switch the calibrator on by pressing the ON / OFF | LIGHT
key.
The last selected voltage range is displayed. Set the voltage value:
ON indicates:
Select voltage range and acknowledge for fixed value function.
Voltage is applied directly to the output!
Select the digit to be changed with the keys, and change the respectively selected digit with the  keys.
The output can be deactivated with the OUT | ENTER key
[
out.off], or activated once again.
Change the fixed value.
000.00 V  
(Negative values within a range of ±60 mV or ±300 mV can be selected by
scrolling with the
select range: 15 V   60 mV
key to below the zero point.)
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4 Frequency Generator (positive square-wave pulses) [Hz]

Note!
Attention!
!
ZERO/ SEL
ESC
ZERO/ SEL
ESC
OUT
ENTER
ZERO/ SEL
ESC
OUT
ENTER
Voltage and frequency can be set independent of each other for frequency generators. The output signal is a square wave. Resistance of the connected circuit should not be any less than 1 kΩ.
Connect the device to be calibrated with the measurement
cable in the same way as specified for the voltage simulator.
Select the HZ calibration function with the rotary switch.Switch the calibrator on by pressing the ON / OFF | LIGHT
key.
Set the voltage range (300 mV, 3 V, 10 V or 15 V):
Switch to the voltage range menu [ ZERO/SEL | ESC key twice. Select the desired voltage range with the  keys. Acknowledge your selection with OUT | ENTER. The display is switched to the voltage amplitude entry window.
Set voltage amplitude (0 15 V):
Select the digit to be changed with the keys, and change the respectively selected digit with the  keys. Acknowledge your selection with OUT | ENTER. The display is switched to the frequency entry window, but the selected voltage amplitude still appears in the auxiliary display.
Set frequency (1 … 1000 Hz):
ON indicates: Voltage is applied directly to the output using the se­lected frequency!
Select the digit to be changed with the keys, and change the respectively selected digit with the  keys.
The output can be deactivated with the OUT | ENTER key
[
out.off], or activated once again.
select range] by pressing the
The following error messages are possible: “HiCurr” (high current – current at overload limit) where I
=18mA, “0ut 0l” and 3 acoustic signals (out of
max.
limit – limit value exceeded) where I > 27 mA; the simulator is switched off.
No interference voltage may be applied to the calibrator jacks in this operating mode. The calibrator is protected against brief application of a large interference voltage with a replaceable fuse in the event of operator error (see section 12.3).
Abbreviated Instructions
Set the voltage range (starting from frequency display).
select range: 15 V 60 mV
Set voltage amplitude (starting from frequency display).
000.00 V  
Set frequency.
0000.0 Hz  
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5 Resistance Simulation [Ω]
Note!
Attention!
!
Output
CALIBRATOR
+
2-Wire Resistance Simulation
Device to be Calibrated
+
Input
Measuring Current: 50 μA to 5 mA
Ω
ON/OFF
LIGHT
The resistance simulator is capable of simulating resistors using
Abbreviated Instructions
Select the calibration function.
2-wire connection for the following range: 5 2000 Ω.
Change the fixed value.
0000.0 Ω  
The following error messages are possible: “HiCurr” (high current – current value to high) where I>4.5mA and
Connect the device to be calibrated with the measurement
cable as shown.
LoCurr” (low current – current too low or reversed polarity) where I < 40 μA (corresponds to unconnected sockets)
Select the Ω calibration function with the rotary switch.Switch the calibrator on by pressing the ON / OFF | LIGHT
key.
Set the resistance simulation value:
ON indicates: The output is active!
Select the digit to be changed with the keys, and change the respectively selected digit with the  keys.
The output can be deactivated with the OUT | ENTER key
[
out.off], or activated once again.
Switching Between the Fixed Value, Interval and Ramp Functions
Press the ZERO/ SEL | ESC key in order to switch to the
[select range] menu.
Switch to the interval or ramp function menu with the 
keys. Start the respective function with OUT | ENTER.
No interference voltage may be applied to the calibrator jacks in this operating mode. The calibrator is protected against brief application of a large interference voltage with a replaceable fuse in the event of operator error (see section 12.3).
Response time of the calibrator output to the specified resistance value after measuring current is applied is max. 30 ms. Devices under test with non-continuous measuring current (e.g. scanned measuring inputs) result in erroneous measured values if measurement is started before response time has elapsed. The calibrator cannot be used for devices of this type.
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6 Temperature Simulation [°C / °F]

MEAS/ CAL
SETUP
OUT
ENTER
MEAS/ CAL
SETUP
OUT
ENTER
OUT
ENTER
OUT
ENTER
MEAS/ CAL
SETUP
MEAS/ CAL
SETUP
OUT
ENTER
OUT
ENTER
OUT
ENTER
OUT
ENTER
MEAS/ CAL
SETUP
MEAS/ CAL
SETUP
OUT
ENTER
OUT
ENTER
OUT
ENTER
OUT
ENTER
OUT
ENTER
MEAS/ CAL
SETUP
The temperature simulator is capable of simulating resistance temperature detectors (RTD) or thermocouples (TC) with specification of the external reference junction temperature.
Connect the device to be calibrated with the measurement
cables.
Select the Temp RTD or Temp TC calibration function with the
rotary switch.
Switch the calibrator on by pressing the ON / OFF | LIGHT
key. The last selected temperature sensor is displayed. Set the temperature value:
Simulated resistance or simulated voltage is applied directly to the
output!
Select the digit to be changed with the keys, and change
the respectively selected digit with the  keys. As an
alternative, press and hold the  keys with the cursor at
any entry position until the higher value digits are scrolled
through as well. The output can be deactivated with the OUT | ENTER key
[
out.off], or activated once again.
Query internal reference temperature – Info menu.
info
batt 2.9 V ... temp internal 23.7 °C
Parameter Entries for Thermocouple Temperature Simulation
Select unit of measure °C or °F – SEt menu.
info set
time ...temp internal
unit set °F °C
Select internal reference temperature – SEt menu.
info set
time ...temp external
unit set temp set external internal
temp internal 23.7 °C
Selecting Resistance Temperature Detector (RTD) or Thermocouple (TC) for the Fixed Value, Interval or Ramp Function
Switch to the fixed value, interval or ramp function menu by
pressing the ZERO/ SEL | ESC key. Select the [
select sensor] menu with the  keys.
Select the desired sensor with the  keys. Acknowledge
your selection with OUT | ENTER. The display is switched to
the window for temperature value entry, but the selected
sensor still appears in the auxiliary display.
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Select and set external reference temperature – SEt menu.
info set
time ...temp internal
unit set temp set internal external
external set 21.0 °C  
temp external 22.4 °C
6.1 Temperature Simulation for Resistance Temperature Detectors –
RTD
ON/OFF
LIGHT
ZERO/ SEL
ESC
OUT
ENTER
TC
ON/OFF
LIGHT
ZERO/ SEL
ESC
OUT
ENTER
RTD setting for temperature
Resistance temperature detectors (types Pt100, Pt1000, Ni100 and Ni1000) are simulated by means of resistance values.

6.2 Temperature Simulation for Thermocouples – TC Temperature Setting

Thermocouples (types B, E, J, K, L, N, R, S, T and U) are simulated with voltage. Internal or external temperature compensation is possible.
Abbreviated Instructions
Select the calibration function.
Select a sensor value and acknowledge for the fixed value function.
select sensor Pt100 ... ni1000
Set the temperature simulator value.
120.0°C  
Response time of the calibrator output to the specified resistance value after measuring current is applied is max. 30 ms. Devices under test with non-continuous measuring current (e.g. scanned measuring inputs) result in erroneous measured values if measurement is started before response time has elapsed. The calibrator cannot be used for devices of this type.
Abbreviated Instructions
Select the calibration function.
Select a sensor type and acknowledge for the fixed value function.
select sensor b ... u
Set the temperature simulator value.
120.0 °C  
Select internal or external reference temperature, set external reference temperature (see page 11).
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Function Description and Applications
Attention!
!
Output
CALIBRATOR
+
Output
CALIBRATOR
+
Device to be
Terminal Block
Equalizing Lead
Device to be
Copper Wire
Temperature measurement, e.g. via multimeter with temperature sensor
Example for point a), internal reference junction
Example for point b), external reference junction
Calibrated
Calibrated
10 different types of thermocouples can be selected, and can be simulated within the temperature ranges specified by IEC/DIN. Selection can be made between an internally measured reference junction temperature, or numeric entry of an external reference junction temperature within a range of –30 to +60 °C.
Important Notes Regarding Reference Temperature
Internal reference temperature is continuously measured with an integrated temperature sensor. The reference temperature is generally measured at the thermocouple connector jack for devices to be calibrated with a thermocouple measurement input.
The two measurements may yield different results, and differences are registered as errors during thermocouple simulation. The following methods help to reduce this error:
a) The device to be calibrated is connected to the jacks at the
calibrator with equalizing leads for the thermocouple to be
simulated. b) The temperature of the thermocouple connector jack at the
device to be calibrated is measured with a precision
temperature measuring instrument, and the resulting value is
entered to the calibrator as a reference temperature. The
calibrator and the device to be calibrated are connected with
copper wire.
No interference voltage may be applied to the calibrator jacks in this operating mode. The calibrator is protected against brief application of a large interference voltage with a replaceable fuse in the event of operator error (see section 12.3).
Otherwise, the external reference temperature is entered in all cases where temperature measurement at the device to be calibrated is accomplished by means of a thermostatic reference junction (end of the thermocouple equalizing lead).
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7 Current Source and Current Sink [mA]

mA
ON/OFF
LIGHT
ZERO/ SEL
ESC
OUT
ENTER
Connect the device to be calibrated with the measurement
cables (see example in section 7.1).
Select the mA current sink ( ) or mA current source ( )
calibration function with the rotary switch.
Switch the calibrator on by pressing the ON / OFF | LIGHT
key. The last selected current range is displayed. Set the current simulation value:
SINK ON indicates that the current sink is active! SOURCE ON
indicates that the current source is active!
Select the digit to be changed with the keys, and change
the respectively selected digit with the  keys. The current sink / current source can be deactivated by
pressing the OUT | ENTER key [SINK/SOURCE
vated once again.
Selecting a Current Range for the Fixed Value Function
Press the ZERO/ SEL | ESC key in order to switch to the
[
select range] menu.
Select the desired current range with the  keys
(0 20 mA, 4 20 mA or 0 24 mA).
Acknowledge your selection with OUT | ENTER.
The display is switched to the current value entry window, but
the selected current range still appears in the auxiliary display.
Selecting the Current Range for the Interval or Ramp Function
Press ZERO/SEL | ESC key in order to switch to the
[
select range] menu. Select the desired current range with the
 keys.
Switch to the interval or ramp function menu with the 
keys. Start the respective function with OUT | ENTER.
out.off], or acti-
Abbreviated Instructions
Select the calibration function.
Select a current range and acknowledge for the fixed value function.
select range 0 20 0 24 4 20
Change the fixed value.
15.00 mA  
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7.1 Current Sink – Simulation of a 2-Wire Transmitter

Output
CALIBRATOR
+
Peripheral Device
24 V
4 to 20 mA = 0 to 100 °C
+
+
Power Supply
A current sink (0 24 mA) or current loop load can be simulated with this function. The calibrator regulates the current, which flows via the calibrator jacks from an external power supply independent of direct voltage applied to the jacks (4 27 V). The calibrator varies internal resistance such that the selected current value is maintained.
Note!
The last selected simulation range is saved to memory. Voltage at the calibrator jacks may not exceed 27 V in the current sink operating mode, because thermal overload would otherwise occur and the fuse would blow. LoVolt appears at the display if voltage is too low.
Attention!
!
If the calibrator is used as a current sink and switched off at closed electrical circuit or else switches off automati­cally due to low battery status, a high current may occur which – depending on the capacity of the external voltage source – trips the integrated fuse.
Do not switch off the calibrator before opening the electrical circuit.
Please make sure that the current sink function is only per­formed with sufficient battery capacity or in combination with a power pack.
Example of a 2-Wire Transmitter Measuring Circuit

7.2 Current Source

Internal supply power is used to simulate a current source.
Note!
The current source’s internal control loop is monitored: If voltage drop at the external load (burden) is greater than 16 V, or if the electrical circuit is interrupted, “Hi burd” appears at the display.
Attention!
!
No interference voltage may be applied to the calibrator jacks in this operating mode. The calibrator is protected against brief application of a large interference voltage with a replaceable fuse in the event of operator error (see section 12.3).
CALIBRATOR
Output
Peripheral Device
+
+
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8 Interval Functions, Ramp Functions and Procedures

Auto
Final Value
Initial Value
Initial Value
Final Value
Manual
Two types of setpoint sequences can be generated in order to simulate sensor conditions at the inputs of transducers, transmitters and buffer amplifiers:
Interval sequences (see section 8.1)
Automatic (periodic) or manually controlled sequences or
Ramp sequences (see section 8.2)
Endless loops (periodic) or one-time only sequences
The above mentioned sequences can be conveniently generated at a PC with the help of METRAwin90-2 software as an accessory.

8.1 Interval Sequences – INT Function

Output ranges are divided into rising or falling interval steps with this function, and the number of interval steps, as well as their duration, can be specified. This function is above all suitable for calibrating analog displays and recorders during one-man operation. Input parameters for interval sequences:
• All simulation functions except for Hz can be adjusted as
output quantities.
• A lower (Start) and an upper (
for each output quantity from within the overall range.
• The number of steps can be set within a range of 1 99.9.
The number of steps can be entered as a whole number as
well, which is especially practical for analog indicators and
recorders with non-standardized scale divisions.
• The interval duration per step (t1) can be selected from within
a range of 1 second to 60 minutes.
End) range limit can be selected
• Step jumps can be executed manually ( the and keys, or automatically (
1nt mode = Auto ) with
selectable time per step.
Examples of Automatic Interval Sequences
Examples of Manual Interval Sequences
1nt mode = manual) with
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Setting the Interval Parameters
ZERO/ SEL
ESC
MEAS/ CAL
SETUP
OUT
ENTER
OUT
ENTER
OUT
ENTER
OUT
ENTER
OUT
ENTER
OUT
ENTER
4
8
12
16
20
t[s]
I
Source
manual stop
[mA]
➀➂
ESC
Time intervals depend upon the operator (only identical in automatic mode).
  
OUT
ENTER
ZERO/ SEL
ESC
seleCt range 300 mV 15 V 1nt
Example of a Manually Controlled Interval Sequence
Initial value:
1nt start 02.000 V  
Final value: 1nt end 10.000 V  
Steps:
Dwell time:
Repetition:
(Auto = automatic sequence, MAnuAL = manual sequence)
1nt steps 03.0  
1nt t1 00.05 min.s  
1nt mode auto manual
Manually Controlled Interval Sequence
After entering all parameters for the “manual interval sequence” output function (
1nt mode = manual ) and starting the function with
the key, the individual steps are triggered with the and
keys. The relationship between the output signal and each of the key operations is depicted with the help of the following exam­ple.
GMC-I Messtechnik GmbH 17
Key
1 When 1nt
ready is displayed:
Start the sequence by pressing .
2 The sequence is continued in the corresponding direction by
pressing the or the key.
3 Stop the interval sequence by pressing .
Automatic Interval Sequence
2
4.6
7.3
10
t[s]
U
[V]
run up stop
➀➃
5101520250
run dn hold run up run dn
HOLD CONT
LCD :
ESC/
OUT
ENTER
ZERO/ SEL
ESC
Example of an Automatic Interval Sequence
Automatic execution of a programmed sequence range is above all advisable if feeding to a signal circuit and scanning of the peripheral device under test are physically separated.
After entering all parameters for the “automatic interval sequence” output function (see above) (I
nt, mode = auto), the sequence can be
started and stopped whenever desired, as well as resumed.
Interval parameters: output quantity: U (range of 0 … 15 V),
start =2V, end = 10 V, number of interval steps =3, t1 =5s, mode = auto
Key
1 When 1nt
ready is displayed:
Start the sequence by pressing .
2 The sequence is stopped by pressing the or the key.
Interval time elapsed thus far is saved as t
18 GMC-I Messtechnik GmbH
3 The sequence is resumed by pressing the key; remaining
sequence duration ty=t1–tx.
4 Stop the interval sequence by pressing .
.
x

8.2 Read-Out a Periodic Ramp – RAMP Function

3, 0, 0 (t1, t2, t3)
1, 0, 4
0, 2, 0
0, 1, 2
0, 0, 3 (t1, t2, t3)
2, 0 ,2
2, 1 ,0
2, 1 ,2
Ramp-type signals can be used to test the dynamic performance of devices to be calibrated, or entire measuring circuits. An example would be performance of a control loop with a setpoint specified via the analog setpoint input at the controller. The instrument can be used to replace costly hardware and software for the setup of long-term test bays with cyclical time sequences.
Parameters for the ramps depicted below:
• The following functions can be adjusted as output quantities:
• A lower (Start) and an upper (
• Rise time t1 and decay time t3 are adjustable from 0 seconds
• Dwell time t2 at the upper and lower range limits is adjustable
• There are 2 ramp sequences:
voltage U, current sink I sink, current source I source, resistance R or temperature temp (TC or RTD).
End) range limit can be selected
for each output quantity from within the overall range.
to 60 minutes.
from 0 seconds to 60 minutes
– One-time only ( – Repetition (
onCE ): t1, t2, t3
repeat ): t1, t2, t3, t2, t1, t2, t3,
Examples of Ramp Sequences
GMC-I Messtechnik GmbH 19
Setting Ramp Parameters
ZERO/ SEL
ESC
MEAS/ CAL
SETUP
OUT
ENTER
OUT
ENTER
OUT
ENTER
OUT
ENTER
OUT
ENTER
OUT
ENTER
Start
End
t1
t2
t3
t2
Output
t
OUT
ENTER
2 V
10 V
t1 t2 t3
LCD :
t3 t2
t1
➀➁
t1 up t2 run t3 dn t3 hld t3 up t3 run t3 hld t1 dn
U
[V]
HOLD CONT
HOLD CONT
/
/
ESC
OUT
ENTER
ZERO/ SEL
ESC
seleCt range 300 mV 15 V ramp
Example of a Periodic Ramp Sequence Controlled by Manual Intervention
Initial value:
ramp start 02.000 V  
Final value: ramp end 10.000 V  
Rise time:
Dwell time:
Decay time:
ramp t1 00.05 min.s  
ramp t2 00.08 min.s  
ramp t3 00.05 min.s  
Repetition: ramp mode repeat onCe
(rEPEAT = endless loop, onCE = one-time only)
Example of a Periodic Ramp Sequence
Manually Controlled Ramp Sequence
After entering all parameters, start by pressing . Rising or decaying ramps can be triggered with the or key. The relationship between the output signal and each of the key operations is depicted with the help of the following example.
Ramp parameters: output quantity: U (range of 0 … 15 V),
start =2V, end =10V, t1 =5s, t2 =8s, t3 =5s, repeat for peri-
odic ramps
Key
1 When ramp ready is displayed:
Start the sequence by pressing .
2 Stop the decaying ramp within decay time t3 with the or
key.
3 Start a rising ramp within remaining decay time t3 with the
key.
4 Stop the ramp sequence by pressing the or key. 5 Start a decaying ramp with the key, remaining dwell time t2
is cleared.
6 Stop the ramp sequence by pressing .
20 GMC-I Messtechnik GmbH

9 Device and Calibration Parameters

MEAS/ CAL
SETUP
OUT
ENTER
OUT
ENTER
OUT
ENTER
OUT
ENTER
MEAS/ CAL
SETUP
OUT
ENTER
MEAS/ CAL
SETUP
OUT
ENTER
OUT
ENTER
OUT
ENTER
MEAS/ CAL
SETUP
The instrument’s “SET” mode (menu mode) makes it possible to set operating and measuring parameters, query information and activate the interface.
The menu mode is accessed by pressing the MEAS/ CAL | SETUP
key, assuming that the instrument is switched on and set to “Measure” (measuring mode operation). “inFo” appears at the display.
The main “SET” menu can be accessed, after which the display
can be returned to the “inFo” menu, by repeatedly pressing the
  key (any direction).
After selecting the desired main menu, sub-menus are
accessed by pressing the OUT | ENTER key.
The desired parameter is selected by repeatedly pressing the
 key.
In order to check or change a parameter, acknowledge it with
the OUT | ENTER key.
The
  keys can be used to position the cursor at the entry
position. The desired value is selected with the help of the
Changes can only be accepted with the OUT | ENTER key.You can return to the sub-menu without making any changes
by pressing the ZERO/SEL | ESC key, and to the main menu by pressing the ZERO/SEL | ESC key once again etc.
You can switch to the calibrating mode from any menu level by
pressing the MEAS/CAL | SETUP key.
 keys.
Example: Setting Time
inFo set t iME
t iME set 14:11 :11 (hh:mm:ss) 
Setting hours and minutes:
   Change the setting, the entry position blinks.
Advance to desired entry position.
Press and hold the key
to change the setting rapidly. The new time setting is activated after acknowledgement.
Querying Operating Parameters – SETUP Menu > Info
inFo bAtt  ... 
1tEMP internal
24.2° C
Parameters: see section 9.1.
Setting Operating Parameters – SETUP Menu > Set
info set
apoff unit set °F °C temp internal / external
time date addr irstb
temp set intern external external set 24.2° C 
Parameters: see section 9.2.
GMC-I Messtechnik GmbH 21

9.1 Querying Parameters – InFo Menu

MEAS/ CAL
SETUP
OUT
ENTER
MEAS/ CAL
SETUP
OUT
ENTER
MEAS/ CAL
SETUP
OUT
ENTER
MEAS/ CAL
SETUP
OUT
ENTER
MEAS/ CAL
SETUP
OUT
ENTER
OUT
ENTER
OUT
ENTER
MEAS/ CAL
SETUP
OUT
ENTER
OUT
ENTER
OUT
ENTER
OUT
ENTER

9.2 Entering Parameters – SETUP Menu

bAtt – query battery voltage
inFo
bAtt 3.1 V.
tiME / dAtE – query date and time
bAtt
inFo
DD.MM.YYYY hh:mm:ss D = day, M = month, Y = year, h = hour, m = minute, s = second
...  02.01.
2008 13:46:56
Date and time must be reentered after replacing the batteries.
cALdAt – query calibration date
inFo
caldat 02.01.08 uEr 0.
.
04
bAtt
... 
ItEMP – query internal reference temperature and temperature unit of measure
The temperature of the internal reference junction is measured with a temperature sensor in close proximity to the input sockets.
bAtt
... 
inFo
1tEMP internal
24.2° C
tiME – set time
Entering the correct time makes it possible to calibrate in real-time.
inFo SET time
time set 10:24:24 (hh:mm:ss) 
Date and time must be reentered after replacing the batteries.
dAtE – enter date
Entering the current date makes it possible to calibrate in real-time.
SET time dAtE
inFo
date set 02.01 (DD: day . MM: month) wrs
year set 2008 (YYYY: year) 
Date and time must be reentered after replacing the batteries.
22 GMC-I Messtechnik GmbH
Addr – set device address
MEAS/ CAL
SETUP
OUT
ENTER
OUT
ENTER
ZERO/ SEL
ESC
ON / OFF
LIGHT
tEMP – °C / °F setting, select internal/external reference temperature
See section 10.2 regarding settings.
irStb – status of the infrared receiver in the stand-by mode
See section 10.2 regarding settings.
APoFF – specified time for automatic shutdown and continuous ON
The instrument is switched off automatically if the calibration value remains unchanged for a long period of time and if none of the keys or the rotary switch have been activated before the specified time “APoFF” (entered in minutes) has elapsed. If a value between 10 and 59 minutes is set, this value is retained even after switching the instrument off.
Operating mode "Continuously ON"
If you select setting on, the calibrator is set to continuous opera­tion. is shown on the bottom left of the display. Alternatively, you can set operating mode "Continuoulsy ON" with the instru­ment keys (prerequisite: switch position other than OFF and instrument OFF):
Press and hold the two keys OUT | ENTER and ON / OFF | LIGHT until the display test is activated.
The calibrator can now be switched off manually only. After switching it on again, a default value of 10 minutes is preset.
... SET time ... APoFF
inFo
See section 6 regarding selection.

9.3 Default Settings

Previously entered changes can be undone, and the default settings can be reactivated. This may be advisable under the following circumstances:
• After the occurrence of software or hardware errors
• If you are under the impression that the multimeter does not work correctly
Disconnect the device from the circuit.Remove the batteries temporarily (see also section 12.2).
Simultaneously press and hold the and
keys, and connect the batteries at the same time.
APoFF
set 10 ... 59 min on 
(10 minutes = default setting)
GMC-I Messtechnik GmbH 23
10 Interface Operation (with selector switch setting OFF)
MEAS/ CAL
SETUP
OUT
ENTER
OUT
ENTER
OUT
ENTER
MEAS/ CAL
SETUP
OUT
ENTER
OUT
ENTER
OUT
ENTER
The calibrator is equipped with an infrared interface for communi­cation with the PC. Commands are optically transferred through the instrument housing by means of infrared light to an interface adapter (accessory) which is attached to the calibrator. The adapter’s USB interface allows for connection to the PC with an interface cable. Commands and parameters can be transmitted from the PC to the calibrator. The following functions can be executed:
• Configuration and read-out of calibration parameters
• Calibration function and measuring range selection
• Start calibration
• Programming of user-specific procedures (interval and ramp functions)

10.1 Activating the Interface

The interface is automatically activated for receiving operation (calibrator receives data from the PC) as soon as the interface is addressed by the PC, assuming that the “ been set to “on” (see section 10.2), or the instrument is already switched on (the first command wakes up the calibrator, but does not yet execute any further commands).
Switching the Interface On via the PC
After transmission of a data frame from the PC, the simulator is switched on. Use the power pack for lengthy on-times for this reason. This prevents automatic shutdown due to battery voltage monitoring.
Operation in the REMOTE Mode
In the REMOTE mode, the device responds just like it does in the local mode. The device is reset to local mode operation after switching it off and back on again with the ON / OFF | LIGHT key.
1rStb” parameter has

10.2 Configuring Interface Parameters 1rStb – status of the infrared receiver in the stand-by mode

There are two possible switching statuses for the infrared interface when the calibrator is switched off:
on: IR appears at the display and the infrared interface is
active, i.e. signals such as making commands can be received, and power is consumed even though the calibrator is switched off.
oFF: IR does not appear at the display and the infrared
interface is switched off; signals cannot be received.
inFo
... SET time ... irStb
irStb Set on / oFF 
(irstb = oFF = default setting)
Addr – address
If several calibrators are connected to the PC via an interface adapter, a separate address can be assigned to each instrument. Address number 1 should be selected for the first instrument, 2 should be assigned to the second and so forth.
inFo
... SET time ... Addr
00 ... 01 ... 15 
(Addr = 15 = default setting)
24 GMC-I Messtechnik GmbH

11 Technical Data

Note!
Simulation
Range
Calibration
Function
Direct Voltage Source Minimum Load
0…±300 mV 0.01 mV 0 3 V 0.1 mV 0.05 + 0.2
V
0 10 V 1 mV 0.05 + 2 0 15 V 1 mV 0.05 + 2
Frequency Generator
Duty cycle (pulse-no-pulse ratio): 50%, amplitude: 10 mV … 15 V
Hz
1 Hz … 1 kHz
Current Source Max. load ±(% S + μA)
4 20 mA
mA
0 24 mA
Current Sink ±(% S + μA) U
4 20 mA
mA
0 24 mA
Resistance Simulation
Ω 5 2000 Ω 0.1 Ω 0.05...0.1..4...5 0.05 + 0.2 5 mA
Observe maximum allowable voltage for connection from external sources to the calibrator output if current sink is selected: U 27 V. The calibrator is protected against brief application of a large interference voltage with a replaceable fuse in the event of operator error., i.e. in case of overloading (> I may blow.
Resolution,
30,000
Digits
(4¾ places)
Resistance
1 kΩ
Minimum Load Resistance ±(% S + Hz) I
0.1 … 1 Hz 1 kΩ 0.05 + 0.2 18 mA
1 μA 16 V 0.05 + 20 20 mA
1 μAVin = 4 ... 27 V 0.05 + 2 27 V0 20 mA
Sensor current [mA]
Intrinsic
Uncertainty
±(% S + mV) I
0.05 + 0.02
±(% S + Ω)I
Overload
18 mA
max/Umax
max
max
max
max
) the fuse
ext
Simulator for Temperature Sensors (resolution: 0.1 K)
Sensor Type Simulation
Resistance Thermometer per IEC 751 ±(% S + K) I
Pt100 – 200 + 850 –328+ 1562 0.1 + 0.5 Pt1000 –200 +300 –328 +572 0.1 + 0.2 Resistance Thermometer per DIN 43760 ±(% S + K) I Ni100 –60 + 180 –76 +356 0.1 + 0.5 Ni1000 –60 +180 –76 + 356 0.1 + 0.2
RTD sensor current: 0.05 ... 0.1 ... 4
Thermocouples per DIN and IEC 584-1
K (NiCr/Ni)
°C / °F
J (Fe/CuNi) T (Cu/CuNi) –270…+ 400 – 454…+752 B (Pt30Rh/Pt6Rh) +500...+1820 +932…+3308
E (NiCr/CuNi) R (Pt13Rh/Pt) –50…+1768 –58…+3214
N (NiCrSi-NiSi) S (Pt10Rh/Pt) –50…+1768 –58…+3214 L (Fe/CuNi) –200+ 900 – 328+1652 U (Cu/CuNi) –200…+ 600 –328…+ 1112
Range
in °C
–250…+1372
–210…+1200
–270…+1000
–270…+1300
* Without internal reference junction;
relative to fixed external reference temperature and thermovoltage of the thermocouple,
0 to
Regarding additional error see also the table on page 26. Internal reference junction: 2 K intrinsic error External reference junction: entry of –30 to 60 °C
Simulation Range
in °F
... 5 mA
–418+2501 –346+2192
–454+1832
–454+2372
Key
S = setting value
Intrinsic
Uncertainty
*
Δ
U in mV * I
±
( 0.05%
of |Setting|
+
0.02 mV )
Over­load
5 mA
5 mA
18 mA
max
max
max
GMC-I Messtechnik GmbH 25
Internal clock
Time format DD.MM.YYYY hh:mm:ss Resolution 0.1 s Accuracy ±1 minute per month Temperature Influence 50 ppm / K
Reference Conditions
Ambient temperature +23 °C ±2K Relative humidity 40 ... 75% Battery voltage 3.0 V ±10 %
Thermocouple Simulation Error [°C]
Thermocouple error is specified in the technical data as thermovoltage error: ΔU. ΔT error is dependent upon characteristic thermocouple slope.
In consideration of characteristic thermocouple non-linearity, which also applies to slope (1
st
dT/dU derivation) mathematically
calculated ΔT error is shown in the following table for all thermocouple types in the 100 °C sub-range. The values shown in the table represent maximum possible error for the respective sub-range.
If an internal reference temperature is used, the intrinsic error of the reference junction must be taken into account . If an external reference temperature of other than 0 °C is used, the sub-ranges of the table on the right apply, adjusted by the amount of the relevant reference temperature.
Example
External reference temperature = 50 °C: the errors of the sub­range 100 200 °C apply for setting values from 50 150 °C.
Additional Error for Thermocouple Simulation
Thermocouple Type T Error in K for Thermocouple Types (ref. temp. 0° C)
Sub-Range: °CJLTUKESRBN
– 200 ... –100
– 100 ... 0
0 ... 100
100 ... 200
200 ... 300
300 ... 400
400 ... 500
500 ... 600
600 ... 700
700 ... 800
800 ... 900
900 ... 1000
1000 ... 1100
1100 ... 1200
1200 ... 1300
1300 ... 1400
1400 ... 1500
1500 ... 1600
1600 ... 1700
1700 ... 1800
1.2 1.0 1.6 1.4 1.6 1.1 2.3
*)
0.6 0.8 0.9 0.9 0.8 0.6
0.5 0.6 0.6 0.6 0.7 0.5 3.8 3.9 0.9
0.6 0.7 0.6 0.6 0.7 0.5 3.2 3.2 0.8
0.6 0.7 0.6 0.6 0.7 0.5 2.6 2.5 0.8
0.7 0.8 0.6 0.6 0.8 0.5 2.5 2.3 0.8
0.7 0.8 0.6 0.8 0.6 2.4 2.2 0.9
0.7 0.9 0.6 0.9 0.6 2.4 2.2 4.2 0.9
0.8 0.9 0.9 0.7 2.3 2.1 3.6 0.9
0.8 0.9 1.0 0.8 2.3 2.1 3.3 1.0
0.9 0.9 1.1 0.8 2.3 2.1 2.9 1.0
0.9 1.2 0.9 2.3 2.0 2.8 1.1
1.0 1.2 2.3 2.0 2.6 1.2
1.1 1.3 2.3 2.0 2.5 1.3
1.4 2.3 2.1 2.4 1.4
1.5 2.4 2.1 2.3
*)
5.2
5.5
2.4 2.2 2.3
2.5 2.2 2.3
2.6 2.3 2.3
2.8 2.5 2.4
1.1
Temperature conversion from centigrades to Fahrenheit: T [°F] = 32 + T [°C] x 1.8.
26 GMC-I Messtechnik GmbH
Display
LCD panel (65 mm x 36 mm) with digital display including simula­tion unit of measure and various special functions
Background Illumination
Background illumination is switched off approximately 1 minute after it has been activated.
Display / Char. Height 7-segment characters
Max. Resolution 30 000 Polarity Display “–” (minus sign) is displayed Refresh Rate 2 times per second, every 500 ms
Main display: 1 x 6 digits, 12 mm Auxiliary displays: 2 x 6 digits, 7 mm
Power Supply
Battery 2 AA size batteries
Service life With alkaline manganese (2600 mAh)
Battery Indicator Battery capacity display with battery symbol in 4
Alkaline manganese per IEC LR6 (2 ea. 1.2 V NiMH rechargeable battery also possible)
Calibration Function power
consump­tion
mV, thermocouple 55 mA 45 h
15 V 240 mA 10 h Ω, RTD 85 mA 30 h
Sink, 20 mA 310 mA 8 h
Source, 20 mA 310 mA 8 h
If voltage drops below 1.8 V, the instrument is switched off automatically.
segments: “ ” Querying of momentary battery voltage via menu function.
Service life
Power Saving Circuit
The device is shut down automatically if none of its controls are activated during the specified “AP oFF” time. The simulator is switched off after a period of only 5 minutes (sockets are current and voltage-free). Automatic shutdown can be deactivated.
Power pack socket
If the NA X-TRA power pack is plugged in, the installed batteries are disconnected automatically. Rechargeable batteries can only be recharged externally.
Fuses
Refer to section 12.3 regarding location of the fuse link.
FF160mA/400V, 5 mm x 20 mm min. 10 kA breaking capacity (Article number: Z109N)
Electrical Safety
Protection class II per EN 61010-1:2010/VDE 0411-1:2011 Operating voltage Max. 50 V Measuring category I (250 V) Pollution degree 2 Test voltage 500 V~ per EN 61010-1:2010/VDE 0411-
1:2011
Electromagnetic Compatibility (EMC)
Interference emission Interference immunity
EN 61326-1:2006, class B EN 61326-1:2006
EN 61326-2-1:2006
GMC-I Messtechnik GmbH 27
Data Interface
Type Data transmission Serial, bidirectional (not IrDa compatible) Protocol Device specific Baud rate 38,400 baud Functions Set/query calibration functions and parameters.
Optical via infrared light through the housing
The USB X-
TRA plug-in interface adapter (see
accessories) is used for adaptation to the PC’s USB port.
Ambient Conditions
Accuracy range 0 °C ... +40 °C Operating temp. range −10 °C ... + 50 °C Storage temp. range 25 °C ... +70 °C (without batteries) Relative humidity 40% ... 75 %,
no condensation allowed
Elevation To 2000 m
Mechanical Design
Housing Impact resistant plastic (ABS) Dimensions 200 x 87 x 45 mm
Weight Approx. 0.35 kg with batteries Protection IP 54
Table Excerpt Regarding Significance of IP Codes
st
(1
IP XY char. X)
Protection against pene­tration by solid particles
5 Dust protected 4 Splashing water
(without protective rubber cover)
(pressure equalization via the housing)
IP XY
(2nd char. Y)
Protection against
penetration by water
28 GMC-I Messtechnik GmbH

12 Maintenance

Attention!
!
Note!
Note!
MEAS/ CAL
SETUP
OUT
ENTER
Disconnect the instrument from the device to be calibrated before opening to replace batteries or fuses!

12.1 Displays – Error Messages

Message Meaning
FUSE

12.2 Batteries

Blown fuse
Battery voltage has fallen below 1.8 V
Removing the Batteries During Periods of Non-Use
The integrated quartz movement draws power from the batteries even when the instrument is switched off. It is advisable to remove the batteries during long periods of non-use for this reason (e.g. vacation). This prevents excessive depletion of the battery, which may result in damage under unfavorable conditions.
Battery Replacement
The selected operating parameters remain in memory, although date and time must be reentered.
Charge Level
The current battery charge level can be queried in the “1nfo” menu:
info bAtt 2.7 V
Make sure that no battery leakage has occurred before initial start-up, as well as after long periods of storage. Continue to inspect the batteries for leakage at short, regular intervals.
If battery leakage has occurred, carefully and completely clean the electrolyte from the instrument with a damp cloth, and replace the battery before using the instrument.
If the “ ” symbol appears at the display, the batteries should be replaced as soon as possible. You can continue working with the instrument, but reduced accuracy may result. The instrument requires two 1.5 V batteries in accordance with IEC R 6 or IEC LR 6, or two equivalent rechargeable NiCd batteries.
GMC-I Messtechnik GmbH 29
Replacing the Batteries
Attention!
!
Attention!
!
Attention!
!
Blown Fuse
fuse
A
DC
Disconnect the instrument from the device to be calibrated before opening the battery compartment lid when replacing the batteries.
Set the instrument face down onto the working surface.Turn the slotted screw on the lid with the battery symbols
counterclockwise.
Lift off the lid and remove the batteries from the battery
compartment.
Insert two new 1.5 V mignon batteries into the battery
compartment, making sure that the plus and minus poles match up with the provided polarity symbols.
When replacing the battery compartment lid, insert the side
with the guide hooks first. Tighten the screw by turning it clockwise.
Please dispose of depleted batteries in accordance with
environmental protection regulations!

12.3 Fuses

Testing the Fuse
The fuse is tested automatically when the device is switched on. If the fuse is blown or has not been inserted, “FuSE” blinks at the digital display. The same message appears if the output sockets
are short circuited when the device is switched on.
Replacing the Fuse
If a fuse should blow, eliminate the cause of overload before placing the instrument back into service!
Disconnect the instrument from the device to be calibrated before opening the fuse cover in order to replace the fuse!
Set the instrument face down onto the working surface.Turn the slotted screw on the cover with the fuse symbol
counterclockwise.
Lift off the cover and pry the fuse out using the flat side of the
fuse cover.
Insert a new fuse. Make sure that the fuse is centered, i.e.
located between the tabs at the sides.
When replacing the fuse cover, insert the side with the guide
hooks first. Tighten the screw by turning it clockwise.
Dispose of the blown fuse with the trash.
Use specified fuses only! If fuses with other blowing characteristics, other current ratings or other breaking capacities are used, the operator is placed in danger, and protective diodes, resistors and other components may be damaged. The use of repaired fuses or short-circuiting the fuse holder is prohibited.
30 GMC-I Messtechnik GmbH
Note! Testing the Fuse with the Instrument Switched On
After inserting the fuse with the instrument switched on, it must be switched off briefly and then switched back on again. If con­tact is poor or the fuse is blown, FUSE blinks at the display.

12.4 Housing Maintenance

No special maintenance is required for the housing. Keep outside surfaces clean. Use a slightly dampened cloth for cleaning. Avoid the use of cleansers, abrasives or solvents.

12.5 Return and Environmentally Sound Disposal

This calibrator is a category 9 product (monitoring and control instrument) in accordance with ElektroG (German electrical and electronic device law). This device is subject to the RoHS directive. Further-more, we make reference to the fact that the current status in this regard can be accessed on the Internet at www.gossenmetrawatt.com by entering the search term WEEE.
We identify our electrical and electronic devices in accor­dance with WEEE 2012/19/EU and ElektroG using the symbol shown at the right per DIN EN 50419.
These devices may not be disposed of with the trash. Please contact our service department regarding the return of old devices (see section 15).
If you use
batteries
or
rechargeable batteries
in your instrument or accessories which no longer function properly, they must be duly dis­posed of in compliance with the applicable national regulations. Batteries or rechargeable batteries may contain harmful substances or heavy metal such as lead (PB), cadmium (CD) or mercury (Hg).
They symbol shown to the right indicates that batteries or rechargeable batteries may not be disposed of with the trash, but must be delivered to collection points specially provided for this purpose.
Pb Cd Hg

13 Calibrator Messages

The following messages appear at the main or the auxiliary displays as required. See page 3 for messages displayed at visible segments.
Message Function Meaning
Simulation of
hiCurr
loCurr
lovolt
hiBurd
voltage/pulse
Simulation of resistance/RTD
Resistance simulator
Voltage simulator, frequency generator
0ut0l
Current sink U < 3 V (to little loop voltage)
Current source High burden:
Blinking Calibration Unit of Measure
All calibration functions are balanced/adjusted in accordance with the respective technical specifications at the factory. If a calibra­tion unit of measure blinks, this indicates that balancing constants which have been established and saved to the calibrator are no longer available for the respective function. If this is the case, results may deviate from the specification. We recommend sending the instrument to our Repair and Replacement Parts department for rebalancing (see section 15).
High current = current too high (I > 18 mA)
High current = current too high (I > 4.5 mA)
Low current = current too low (I < 40 μA) ( indicates that connector jacks are open) or reversed polarity, e.g. with Pt and Ni sensors
Output overload = limit value violated (I > 30 mA), 3 acoustic signals are generated at the same time and the simulator jacks are deactivated. After elimi­nating the cause of overload, the output can once again be switched on by pressing the ON / OFF | LIGHT key.
Resistance applied by means of the connected cir­cuit is too high. Voltage built up at the calibrator is equal to or greater than
16 V.
GMC-I Messtechnik GmbH 31

14 Accessories

Attention!
!

14.1 General

The extensive accessories available for our measuring instru­ments and calibrators are checked for compliance with currently valid safety regulations at regular intervals, and are expanded as required for new applications. Currently up-to-date accessories which are suitable for your measuring instrument are listed at the following web address along with photo, order number, descrip­tion and, depending upon the scope of the respective accessory, data sheet and operating instructions: www.gossenmetrawatt.de ( Products Measuring Technology – Portable Calibrators METRAHIT CAL Accessories).

14.2 Power Pack NA X-TRA (not included)

Use only power packs from GMC-I Messtechnik GmbH only in combination with your instrument. This assures operator safety by means of an extremely well insulated cable, and safe electrical isolation (nominal secondary ratings: 5 V / 600 mA). Installed batteries are disconnected electronically if the power pack is used, and need not be removed from the instrument.

14.3 Technical Data for Measurement Cables (scope of delivery: KS17 safety cable set)

Electrical Safety
Maximum Rated Voltage 600 V Measuring Category
CAT IV CAT III CAT II
1000 V
1000 V
Maximum Rated Current 1 A 1 A 16 A
with safety cap applied without safety cap applied
••
Ambient Conditions (EN 61010-031)
Tem pe ra tu re –2 0 °C ... + 50 °C Relative humidity 50 to 80% Contamination level
2
Application KS17
Please observe the maximum values of the electrical safety of the device.
In conformity with standard DIN EN 61010-031, measure­ments in an environment according to measuring category III may only be performed with the safety cap applied to the test probe of the measurement cable.
For establishing contact in 4 mm jacks you have to remove the safety cap by levering out the snap lock of the safety cap with an­other sharp object (e.g. the second test probe).
32 GMC-I Messtechnik GmbH

14.4 USB X-TRA Bidirectional Interface Adapter

This adapter makes it possible to connect the calibrator to a USB port at a PC. The adapter allows for data transmission between the calibrator and the PC.

14.5 METRAwin 90 Software METRAwin 90 calibration software is a multilingual program* for

controlling various calibrators for electrical quantities with the help of a PC, and for documenting calibration results.
Please refer to the METRAwin 90 installation instructions for a description of the METRAwin 90-2, METRAwin 90-F and METRAwin 90-FJ product variants and their detailed system requirements.
* runs under an IBM compatible Windows operating system
GMC-I Messtechnik GmbH 33
15 Repair and Replacement Parts Service
Calibration Center * and Rental Instrument Service
If required please contact:
GMC-I Service GmbH
Service Center
Thomas-Mann-Str. 20 90471 Nuremberg, Germany Phone: +49 911 817718-0 Fax: +49 911 817718-253 E-mail service@gossenmetrawatt.com www.gmci-service.com
This address is only valid in Germany. Please contact our representatives or subsidiaries for service in other countries.
* DAkkS Calibration Laboratory for Measured Electrical Quantities
D-K-15080-01-01 accredited per DIN EN ISO/IEC 17025:2005
Accredited quantities: direct voltage, direct current value, direct current resistance, alternating voltage, alternating current value, AC active power, AC apparent power, DC power, capacitance, frequency and temperature
Competent Partner
GMC-I Messtechnik GmbH is certified in accordance with DIN EN ISO 9001:2008. Our DAkkS calibration laboratory is accredited by the Deutsche Akkreditierungsstelle GmbH (National accreditation body for the Republic of Germany) in accordance with DIN EN ISO/ IEC 17025:2005 under registration number D-K-15080-01-01. We offer a complete range of expertise in the field of metrology: from test reports and factory calibration certificates, right on up to DAkkS calibration certificates.
Our spectrum of offerings is rounded out with free test equipment management.
Our service department includes an on-site DAkkS calibration bench. If errors are discovered during calibration, our specialized person­nel are capable of completing repairs using original replacement parts.
As a full service calibration lab, we can calibrate instruments from other manufacturers as well.
Services
• Pick-up and delivery
• Express service (immediate, 24 hour and weekend service)
• Initial start-up and queries
• Device and software updates to current standards
• Replacement parts and repairs
• Help desk
• DAkkS calibration lab per DIN EN ISO/IEC 17025:2005
• Service contracts and test equipment management
• Rental instrument service
• Disposal of old instruments
DAkkS Calibration Certificate Reprints
If you order a DAkkS calibration certificate reprint for your instrument, please provide us with the reference numbers indicated in the upper and lower most fields of the calibration seal. We do not need the instrument’s serial number.
34 GMC-I Messtechnik GmbH

16 Guarantee

All METRA HIT digital multimeters and calibration instruments are guaranteed for a period of 3 years after shipment. The manufac­turer’s guarantee covers materials and workmanship. Damages resulting from use for any other than the intended purpose or operating errors, as well as any and all consequential damages, are excluded.
The calibration certificate confirms that the product conformed to the specified technical data at the time of calibration. We guaran­tee the observance of the specified technical data within the admissible tolerance limits for a period of 12 months from deliv­ery.

18 Recalibration

The respective measuring task and the stress to which your cali­brator is subjected affect the ageing of the components and may result in deviations from the guaranteed accuracy.
If high measuring accuracy is required and the instrument is fre­quently used in field applications, combined with transport stress and great temperature fluctuations, we recommend a relatively short calibration interval of 1 year. If your calibrator is mainly used in the laboratory and indoors without being exposed to any major climatic or mechanical stress, a calibration interval of 2-3 years is usually sufficient.

17 Product Support

If required please contact:
(DIN EN ISO/IEC 17025) the deviations of your instrument in rela­tion to traceable standards are measured and documented. The deviations determined in the process are used for correction of
During recalibration* in an accredited calibration laboratory
GMC-I Messtechnik GmbH
Product Support Hotline
Phone: +49 911 8602-0 Fax +49 911 8602-709 E-Mail: support@gossenmetrawatt.com
the readings during subsequent application.
We are pleased to perform DAkkS or factory calibrations for you in our calibration laboratory. Please visit our website at www.gossenmetrawatt.com ( Company DAkkS Calibration Center or FAQs Calibration questions and answers).
By having your calibrator calibrated regularly, you fulfill the require­ments of a quality management system per DIN EN ISO 9001.
* Verification of specifications or adjustment services are not part of the
calibration. For products from our factory, however, any necessary ad­justment is frequently performed and the observance of the relevant specification is confirmed.
GMC-I Messtechnik GmbH 35
Phone: +49-911 8602-111 Fax: +49 911 8602-777 E-Mail: info@gossenmetrawatt.com www.gossenmetrawatt.com
GMC-I Messtechnik GmbH Südwestpark 15 90449 Nürnberg •
Germany
Prepared in Germany Subject to change without notice PDF version available from the Internet
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