Zero" Mode - Tenmars TM-507 User Manual

4.4.1. "ZERO" mode

1. Any addition or replacement of cables, extensions and croco clips nullify the previous
calibration and make necessary a new calibration before performing further measurements.
Therefore the instrument must be calibrated in the same conditions at which it will operate
during measurements
2. Short-circuit the cable ends with each other as shown in Fig. 5 making sure that the metallic
parts of test probes and crocodiles are in good touch
100.0 Ω
3. Message
Fig. 5: Connection of the instrument's terminals during calibration procedure
4. Press GO to perform the measurement
Press ZERO the instrument resets the resistance of the cables, the symbol ZERO
5.
is displayed
6. The measured value is stored by the instrument and used as offset (which means it's
deducted from all continuity tests performed) until a new pressing of the ZERO key that voids
the calibration
7. Each time the instrument is switched off the calibrated value is lost
means that the instrument dected a resistance higher than 100.0 Ω
EN - 9
TM-507