Operating Instructions METRALINE ISOCHECK Insulation Resistance Tester 3-349-691-03 2/4.
Meanings of Symbols on the Instrument Table of Contents Page 1 Introduction ...................................................................... 2 1.1 1.2 1.3 1.4 1.5 1.6 Scope of Delivery ...........................................................................2 Optional Accessories ......................................................................2 Safety Precautions .........................................................................2 Applications .......................................
1.4 Applications The test instrument consists of a compact housing with a patented means of retaining the second test probe. The high-contrast, four-color OLED display assures excellent legibility. When performing measurements under unfavorable light conditions, measuring point illumination can be switched on – white LED at the front.
3 Performing Measurements 3.1 Switching the Instrument On and Off, Energy-Saving Mode, Automatic Shutdown 3.3 The instrument is switched on by pressing and holding the START key. Briefly press the START key twice in order to switch the instrument off, during which no voltage may be applied to the test probes! The instrument is switched to the standby mode after several seconds (reduced brightness), if none of the keys has been pressed and no voltage is applied to the test probes.
3.3.2 Insulation Resistance Measurement ➭ Read the measured insulation resistance value. ➭ Switch insulation measurement on by pressing the RISO/USPD key. Figure 3.7: Note The device under test may not be disconnected from the test instrument as long as the “!” warning symbol is lit up. Discharging large capacitances may take several tens of seconds! Setting Test Voltage ➭ Select the required measuring voltage with the help of the ▲ UTEST and ▼ UTEST keys.
If the ! symbol is included in the description of the surge protection device, the manufacturer’s instructions must be observed for the respective device type. The actual measurement is performed as follows: ➭ Select measurement of surge protection devices with the RISO/USPD key, and select the desired sub-function with the FUNC key (see also description above). Example: Figure 3.
3.5 Device Reset Function Ambient Conditions If the test instrument does not function as described in these instructions, we recommend a device reset. The test instrument must be switched off and neither of the test probes may be connected to a DUT. If device functions are still incorrect after switching the instrument back on again, remove the batteries as described in section 5.1 on page 7, wait at least 10 seconds and then reinsert the batteries (or replace them with new ones).
5.1.2 Recharging the Batteries ! instrument is used primarily in the laboratory and indoors without considerable climatic or mechanical stressing, a calibration interval of once every 2 to 3 years is sufficient as a rule. Attention! Use only the charger (Z507A) which is offered as an optional accessory for this instrument to charge the batteries inserted in the instrument.
