Gossen MetraWatt METRAHit 28C light Скачать руководство пользователя страница 24 | Manualshive

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Gossen MetraWatt METRAHit 28C light Скачать руководство пользователя страница 24

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GOSSEN METRAWATT GMBH

12.3 Fuses

Replacing the Fuses

➭

Open the instrument as described under „Replacing the
Batteries“, see chapter 12.1.

➭

Remove the blown fuse with the help of an object such
as a test probe, and replace it with a new fuse.

Attention!

!

Use specified fuse only!
If a fuse with other tripping characteristics, other cur-
rent ratings or other switching capacities is 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 bat-
tery holder is prohibited.

Location of fuses

12.4 Housing

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 and solvents.

13

Calibrator Messages

The following messages appear at the main or the auxiliary
displays as required. See “Symbols used in the Digital Dis-
play” on page 2 for messages displayed via fixed display seg-
ments.

Blinking Unit of Measure

All calibration functions are balanced/adjusted in accordance
with technical specifications at the factory for each series
METRA HIT



28c

light

calibrator. If a unit of measure blinks,

this indicates that the balancing constant which has been
established and saved to the calibrator is 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 chapter 14).

F3

Indication of
fuse characteristics
(see also Technical
Characteristics, page 22

Message

Function

Significance

hiCurr

Simulate voltage/
Impulse

High current = current too high (I > 18 mA)

Simulate resis-
tance/RTD

High current = current too high (I > 4.5 mA)

loCurr

Resistance
simulator

Low current = current too low (I < 40

µ

A)

Indicates that connector jacks are open
(e.g. with Pt and Ni sensors) or polarity reversal

0ut0l

Voltage simulator
Pulse and
frequency genera-
tor

Out of limit = limit value violated (I > 30 mA),
3 acoustic signals are generated at the same
time and the simulator jacks are deactivated.
After eliminaing the cause of the overload, the
output can be reactivated with the ON|OFF key.

lovolt

Current sink

U < 3 V
(insufficient loop impedance)

hiBurd

Current source

High burd = high burden, the voltage applied
by the connected circuit is too high. The resul-
ting voltage at the calibrator exceeds or is equal
to 20 V

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Содержание METRAHit 28C light

Страница 1: ...Operating Instructions METRA HIT 28c light Calibrator 3 349 317 15 6 2 05 ...

Страница 2: ...nnector jack for NA5 600 power pack 8 Connector jacks for calibrator output 9 DKD calibration mark see page 4 Symbols used in the Digital Display 1 Main display with decimal point and polarity display 2 Auxiliary display with decimal point and polarity display 3 Simulator in continuous operation 4 NUM Numeric entry of output signal 5 INT Interval sequence active 6 RAMP Ramp function active 7 ON Ca...

Страница 3: ...Fuses 24 12 4 Housing 24 13 Calibrator Messages 24 14 Repair and Replacement Parts Service DKD Calibration Lab and Rental Instrument Service 25 15 Warranty 25 16 Product Support 25 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...

Страница 4: ...t back to the cali brator In order to avoid damage to the instrument when interfer ence voltages are applied within allowable limit values the mA SINK and mA SOURCE measuring circuit is equipped with a fuse F3 which makes this measuring circuit highly resistive if excessive current should occur in the event of a fault for the duration of overloading Warning The instrument may not be operated in ex...

Страница 5: ...is shown in the diagram on page 3 The instrument is ready for calibration as soon as the key is released Switching the Instrument On with a PC After transmission of a data frame from the PC the simulator is switched on See also chapter 9 2 Note Electrical discharge and high frequency interference may cause incorrect displays to appear and may dis able the simulator In such cases switch the instru ...

Страница 6: ...nt of one another with the frequency generator The output signal is a square wave The resistance of the interconnected circuit should not be any less than 1 kΩ Select the Hz calibration function with the rotary switch Setting voltage amplitude 0 15 V Press the ESC key until you proceed to the menu for set ting voltage amplitude The decade i e the position of the digit to be changed is selected wit...

Страница 7: ... the position of the digit to be changed is selected with the keys and the respective digit is set with the keys Note The following error messages may appear HiCurr high current current too high where I 4 5 mA and LoCurr low current current too low or polarity reversal where I 40 µA i e open jack sockets Attention In this operating mode interference voltages must not be applied to the calibrator j...

Страница 8: ...tern Press the key to return to the temperature si mulation value main menu The measured internal refer nece temperature is indicated with an I for internal on the right hand side at the bottom of the auxiliary display extern Press the key to proceed to the temperature value sub menu Setting the external temperature value The last entry position on the right hand side blinks Enter the digits with ...

Страница 9: ...of a high interference voltage the in strument calibrator is protected by a replaceable fuse F3 see chapter 12 3 Example ad a Internal Reference Junction Example ad b External Reference Junction Selecting Sensor Type Setting the Temperature Simulation Value and Entering the External Reference Temperature Device to be calibrated Terminal Block Equalizing Lead CALIBRATOR Output Device to be calibrat...

Страница 10: ...t sink operating mode because thermal overload would otherwise occur and the fuse F3 would blow LoVoltappears at the display where the voltage is too low Example of a 2 Wire Transmitter Measuring Circuit 7 2 Current Source Internal supply power is used for the simulation of a current source Note The internal control circuit of the current source is monitored if voltage drops by more than 20 V at t...

Страница 11: ...and recorders during single handed operation Input parameters for interval sequences include All simulator functions except for Hz can be adjusted as output quantities A lower Start and an upper End range limit can be selected 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 w...

Страница 12: ...nu Flowchart on page 12 2 The sequence is stopped by pressing the or the key Interval time elapsed thus far is saved as tx 3 The sequence is resumed by pressing the key and remaining sequence duration ty is equal to t1 tx 4 Stop the interval sequence by simultaneously pressing and holding the and the key 2 audible acoustic sig nals must be generated Menu Flowchart Starting and Stopping the Interva...

Страница 13: ... or temp 0 20 Int range mA Range 0 20 4 20 0 24 10 000 Int start mA 20 000 Int end mA 05 5 Int steps Number of 02 00 Int t1 auto Int no Interval Duration Periodic Sequence YES no Start End Output Quantity SEt must blink Configure the ramp Lower Range Limit Upper Range Limit 2x Interval Steps t1 s ESC ESC ESC ESC ESC ESC ESC ESC ...

Страница 14: ...ences Once only t1 t2 t3 Repetitive t1 t2 t3 t2 t1 t2 t3 Examples of Ramp Sequences Example of a Periodic Ramp Sequence Manually Controlled Ramp Sequences After configuring all parameters in accordance with the menu flowchart on page 15 rising or declining ramps can be trig gered with the and the keys The relationship between the output signal and each of the key operations is depicted with the he...

Страница 15: ...mp 0 20 ramp range mA Range 0 20 4 20 0 24 10 000 ramp start mA 20 000 ramp end mA 00 05 ramp t1 Rise Time t1 02 00 ramp t2 00 28 ramp t3 repeat ramp yes Dwell Time t2 Periodic Ramp YES no Start End Output Quantity SEt must blink Configure ramp Lower Range Limit Upper Range Limit 2x ESC ESC ESC ESC ESC ESC ESC ESC Decline Time t3 ESC ...

Страница 16: ... in order to change the cor responding parameter or parameters After the desired digit has been selected with the keys and the value has been adjusted with the keys the next digit is accessed with the key or the display is returned to the start menu or switched to the next sub menu The calibration mode is started by repeatedly pressing the ESC key until the simulator display appears The calibrator...

Страница 17: ...tIme 15 set addr ESC Change Value Set Device Address Acknowledge Address 15 50 05 set tIme ESC Change Value Set Time Acknowledge Entry 20 11 01 set date Set Date Select Position Possible Settings TT MM JJ TT day MM month JJ year Possible Settings hh mm ss hh hour mm minute ss second Digit blinks Possible Setting Values see also chapter 9 2 0 15 set Change Value Select Position ESC set ESC Acknowle...

Страница 18: ...ardless of the actual address Switching the Interface On via PC After transmission of a data frame from the PC the simulator is switched on For this reason the plug type mains supply should be used for long operational periods This avoids automatic deactiva tion by the battery monitoring circuit Operating Controls in REMOTE Operation When set to REMOTE operation the instrument reacts like in local...

Страница 19: ...less documentation and man agement of calibration results the creation of calibration pro cedures and remote control of the calibrator METRA HIT 28c light sequence controls can be imple mented online or off line after downloading complete calibra tion procedures The following conditions must be fulfilled in order to allow for use of METRAwin 90 2 Hardware Requirements WINDOWS and IBM compatible PC...

Страница 20: ...laces With Load of Intrinsic Error Over load Direct Voltage Simulator of s mV Imax V 0 300mV 0 01 mV 700 Ω 0 05 0 02 18 mA 2 0 3 V 0 1 mV 1000 Ω 0 05 0 2 0 10 V 1 mV 1000 Ω 0 05 2 0 15 V 1 mV 1000 Ω 0 05 2 Pulse Frequency Generator Keying ratio mark to space ratio 50 amplitude 10 mV 15 V of s Hz Imax Hz 1 Hz 1 kHz 0 1 8Hz1 1000 Ω 0 05 0 2 18 mA Current Source Max Load Impedance of s µA mA 4 20 mA ...

Страница 21: ...reased by a factor of 1 8 The F sub ranges are calculated as follows F 32 C x 1 8 Additional Error for Thermocouple Simulation Thermocouple Type T Error in K for Thermocouple Types at Ref Temp 0 C Sub Range C J L T U K E S R B N 200 100 1 17 0 83 1 52 1 2 1 59 1 03 2 38 100 0 0 55 0 56 0 78 0 77 0 73 0 51 50 4 79 50 5 29 1 03 0 100 0 42 0 41 0 52 0 51 0 53 0 35 3 77 3 92 0 77 100 200 0 46 0 45 0 4...

Страница 22: ...ination Factor 2 Test Voltage 500 V per EN 61010 1 2001 VDE 0411 1 2002 Electromagnetic Compatibility EMC Interference emission EN 61326 2002 class B Interference immunity EN 61326 2002 IEC 61000 4 2 Feature A 8 kV atmospheric discharge 4 kV contact discharge IEC 61000 4 3 Feature B 3 V m Data Interface Data Transmission optical via infrared light through the housing with interface adapter as acce...

Страница 23: ...ordance with IEC R 6 or IEC LR 6 or equivalent rechargeable batter ies Replacing the Batteries Set the instrument face down onto a flat working surface loosen the two screws at the back and lift off the housing base starting at the bottom The housing top and hous ing bottom are held together with the help of snap hooks at the top front Remove the batteries from the battery compartment Insert three...

Страница 24: ...for each series METRA HIT 28c light calibrator If a unit of measure blinks this indicates that the balancing constant which has been established and saved to the calibrator is 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 chapter 14...

Страница 25: ... expertise in the field of metrol ogy from test reports and proprietary calibration certificates right on up to DKD calibration certificates Our spectrum of offerings is rounded out with free test equip ment management An on site DKD calibration station is an integral part of our ser vice department If errors are discovered during calibration our specialized personnel are capable of completing rep...

Страница 26: ...change without notice A pdf version is available on the Internet GOSSEN METRAWATT GMBH Thomas Mann Str 16 20 90471 Nürnberg Germany Phone 49 0 911 8602 0 Fax 49 0 911 8602 669 E Mail info gossenmetrawatt com www gossenmetrawatt com ...

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