Operating Instructions METRISO C-GB int. Insulation, Resistance and Contact Current Measuring Instrument 3-349-087-03 18/7.
METRISO C Measuring and Test Instrument Infrared interface METRISO C Control Panel and Display Temperature and humidity measuring adapter Z541A Operating and display unit t npu nt i e m ure eas 5V >2 en t e u np etw nput i nt i tm Vb me ea 50 ment e g r 1 a u re olt eas ev nce asu at m enc ere nd me tion r f f a e e i l f d io ag ter ial tact a ev volt r in ent valu ion so t t Pot er con i n a i l u Lim Ma Ins fing Indicator lamps Netz Mains LCD LIMIT U>25V Battery level display The scroll bar ind
+ LCD after Switching on the Instrument Please proceed as follows if the LCD display is not legible, i.e. too bright or too dark, after switching on the test instrument: 1 Simultaneously press the two right-hand keys to delete the memory which might be faulty. 2 Wait a few seconds to allow the display to be updated. 3 Readjust the contrast if necessary, see page 8.
Contents Page Contents Page 1 Applications .....................................................................................4 10 2 Safety Features and Precautions ....................................................5 10.1 Setting the Limit Value ................................................................ 22 Measuring Contact Current ...........................................................22 11 Characteristic Values ....................................................................
as well as requirements in accordance with VDE 0701-0702: Repair, modification and testing of electrical devices The test instrument is especially well suited for: • Systems installation • Initial start-up • Periodic testing • Troubleshooting in electrical systems All required measurements can be performed for approval reports (e.g. for ZVEH) with the help of a set consisting of the PROFiTEST C and the METRISO C.
3 Initial Start-Up 3.1 Battery Test Five battery symbol segments ranging from depleted to fully charged continuously indicate the current battery level at the main menu. 3.2 Installing and Replacing Batteries New batteries must be installed before initial start-up, or when only one solid segment remains in the battery symbol. ! 3.
Default Settings – Last Used Settings A selection can be made here as to whether the menus will be displayed according to the default settings, or if the last opened menus should be displayed. Setting On-Time, Manual Shutdown Ð Ð Ð Activate the Setup key. Ð Press the Default key, if required: on 3 Settings such as Ton (= 20sec) are reset to the default settings each time the instrument is switched on. off 3 The last used settings remain when the instrument is switched on.
Setting the Clock Background Illumination and Contrast LCD Illumination off on Ð Ð low Contrast high Activate the Display key. In order to extend battery service life, display illumination can be switched off entirely. Press the corresponding softkey to this end. If LCD illumination is activated (= ON), it is automatically switched off several seconds after the last key has been activated in order to extend battery service life. As soon as a key is activated again, illumination is switched back on.
3.5 Downloading a Software Update, Managing Report Data If you require an updated test instrument software, it can be downloaded with the help of WinProfi* PC software. The data file with the desired software version is transmitted to the test instrument via the serial interface. The previously installed language is overwritten. + Note This software includes all of the functions required for communications between the METRISO C and the PC.
B Prerequisites for Software Update or Data Exchange Ð Find the interface to which the METRISO C is connected. C Transmission of a Software Update to the Test Instrument Ð + Ð PC: Select the Update All function from the Update menu. Follow the instructions which appear at the monitor. Depending upon the utilized PC, transmission takes from 1 to 2 minutes. Note Always start this function first, before performing an update or changing report templates.
D Managing Report Data Ð Connect the METRISO C test instrument with your PC via the IrDaUSB converter Ð Start WinProfi. Ð Switch on the test instrument. Ð Set the on-time period of the METRISO C to „>>>>>“, to give you enough time for adjusting the settings in WinProfi before the test instrument switches off again automatically, see chapter 3.3.
4 General Operation The test cables are connected to the “+” and “COM” jacks. The shielded cable should also be connected to the COM and SHIELD jacks for the measurement of electrostatic discharge capacity at floor coverings. (Accessory equipment KS-C „Cable set consisting of measurement cable and high-resistance measurement cable for METRISO C, for measurements in the G range“, see connection diagram). Observe color codes when connecting the cables! + COM SHIELD KS-C (Z541F) 4.
5 Measuring Insulation Resistance Insulation resistance can only be measured at voltage-free objects. If mains voltage or an interference voltage is applied to the measurement cables, insulation resistance is not measured and the Netz/Mains lamp lights up. + Note Testing of Measurement Cables We recommend short-circuiting the measurement cables with the test probes before carrying out the insulation measurement to check whether the instrument indicates almost zero W (see chapter 9).
5.1 Insulation Measurement with Adjustable Test Voltage A DC test voltage within a range of 50 to 1000 V can be selected with the UVAR function for measurements at sensitive components and in systems equipped with voltage limiting components. 5.2 Measurement with Rising Test Current The “U ” function can be used for the detection of weak points in insulation, as well as for the determination of response voltage at voltage limiting devices.
6 Database Functions The displayed measurement data for each measurement can be saved to an internal database, with or without a comment. A data record must be created and allocated to a specific memory address in order to be able to assign the individual measurement values to different buildings, distribution cabinets and measuring circuits. Ð With the help of the softkeys, entries can be made to the BUILDING, DISTRIBUTOR CABINET, RCD No.
6.2 Saving Measurement Values – STORE Function Ð Start the respective measurement. The STORE key is displayed after the measurement instead of the INFO key. The STORE key is not displayed until after a given amount of time has elapsed for measurements which are performed without the START key. For example, the store key is not displayed after voltage measurements until a given amount of time has elapsed, so that the operator can first query the help text with the INFO key.
6.3.2 Deleting a Memory Address – Data Function Ð Select Data. Ð Enter blanks to the data fields BUILDING, DISTRIBUTOR CABINET, RCD No. and CIRCUIT. After all of these fields have been entirely overwritten with blanks,they are displayed as inverse images. In case a measurement value is missing for the currently selected current circuit, perform the measurement and the value will be immediately stored. 6.3.1 Deleting a Data Record from within a Memory Address – View Function Ð Activate the Del key.
6.3.3 Delete All Memory Addresses – Data Function Up to 250 data records can be stored to memory. The memory is full when the bar graph to the right of “MEMORY:” is entirely filled in. The entire memory, i.e. all data records from all memory addresses, can be deleted at once. We recommend uploading and saving your data to a PC before deletion. Ð Select Data. By simultaneously activating O and K all data that have been saved are deleted from memory.
7 Measuring Alternating Voltage Sinusoidal alternating voltage within a frequency range of 40 to 200 Hz can be measured with the test instrument. Ð Ð Ð Ð Press the U~/f key. Contact the measuring points with the measuring probes. Ð Ð + 8 Select the desired temperature unit of measure, C or F, with the corresponding key. Temperature and humidity are displayed directly.
Measuring Low-Value Resistance (to 100 ) 9 According to the regulations, measurement of low-value resistance at protective conductors, earth conductors and bonding conductors must be performed with (automatic) measuring voltage polarity reversal, or with the flow of current in one direction (+ pole to PE), or the other (– pole to PE). ! Attention! Low-value resistance may only be measured at voltage-free objects.
9.1 Compensation for Measurement and Extension Cables (up to 10 ) Measurement and extension cable ohmic resistance can be subtracted automatically from the measurement results. Proceed as follows: Ð Activate the key in the menu bar. Ð Short circuit the two test probes at the ends of the measuring cables, with interconnected extension cables if used. Ð Activate the Offset key. Cable resistance is displayed to the right of Offset. Ð Connect the device under test.
10 Measuring Contact Current Voltage at the Device Under Test: UB > 25 V Substantiation of the absence of voltage can be provided by means of contact current measurement (DIN VDE 0701 part 240). START Ð Briefly press the START key in order to start the measurement. Contact voltage UB is measured and displayed. Ð Ð Press the IB key. Contact the measuring point with the + Pole and the COM jack with a protective conductor potential.
11 Characteristic Values Measured Quantity Display Range Test Current Measuring Range Nominal Values / Impedance Intrinsic Uncertainty Measuring Uncertainty RISO 000 k... 99.9 G 1 mA 3) 20 k 10.0 G UN = 100 V 2) (5% rdg. + 3 d) (7% rdg. + 3 d) 0.20 M 10.0 G UN = 250/500/1000 V 2) (5% rdg. + 3 d) (7% rdg. + 3 d) > 10.0 G 99.9 G UN = 100/250/500/1000 V 2) (8% rdg. + 3 d) (10% rdg. + 3 d) (5% rdg. + 3 d) UISO 000 V ... 1.20 kV 50 1.00 kV 5 M (2.5% rdg.
Overload Capacity RLO U~ Electrical Safety Standard VDE Requirement Safety Class Polution degree Measuring Category Fuses Electronic protection disables start-up if interference voltage is present. 500 V~ continuous IEC 61010-1:2010, EN 61010-1:2010 VDE 0411 Part 1, 2011 II 2 Insulation measurement – 1000 V DC – no overvoltage Voltage measurement – 500 V – CAT II FF0.
Table for the determination of maximum display values for low resistances by making allowances for the instrument’s measuring error. Limit Value 0.15 0.20 0.50 1.00 2.00 12 Maximum Display Value 0.11 0.16 0.44 0.92 1.87 Limit Value Maximum Display Value 5.00 10.0 20.0 50.0 4.72 9.47 17.7 44.7 13 Maintenance 13.
Ð Illum: Press the Test key twice in order to activate and deactivate display illumination. Ð Display: Press the Test key after each test pattern appears in order to check the display elements. Ð Keytest: Perform the key test by pressing each of the softkeys once, and by pressing the start key once in each of its three positions. The keys appear filled in at the key pictograph after they have been tested. Individual tests can be skipped by pressing the skip key before starting the respective test.
Replacing Fuses Ð Remove the cap for the respective fuse with the help of a suitable tool (e.g. screwdriver) by pressing and turning counterclockwise. ! Ð Ð Ð Attention! Incorrect fuses may cause severe damage to the test instrument. Only original fuses from GMC-I Messtechnik GmbH assure the required protection by means of suitable breaking characteristics (article no. 3-578-222-02).
14 Repair and Replacement Parts Service Calibration Center* and Rental Instruments Service If required please contact: GMC-I Service GmbH Service Center Thomas-Mann-Strasse 20 90471 Nürnberg • Germany Phone +49 911 817718-0 Fax +49 911 817718-253 E-Mail service@gossenmetrawatt.com www.gmci-service.com This address is for Germany only. Abroad, our representatives or establishments are at your disposal.
