Bedienungsanleitung Gossen Metrawatt METRISO INTRO (Seite 14 von 40) (Englisch)

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14 GMC-I Messtechnik GmbH

4 General Operation

The test leads are connected to the “+” and “COM” jacks.

Measuring High-Value Resistance with the KS-C Probe (Option)

When measuring electrostatic

discharge capacity for floor

coverings, the shielded cable

should also be connected to

the COM and SHIELD jacks (KS-C

accessory set, “cable set con-

sisting of measurement cable

and high-resistance measure-

ment cable for measurements

in the GΩ range”, see diagram). Be sure to observe color coding.

For measuring with the Test Probe for Remote Triggering (Option Z550A)

see section 14.5.1.

4.1 Switching On, Monitoring and Switching Off

If battery voltage falls below the allowable limit value (U < 8 V) the

instrument cannot be switched on, or it is immediately switched

off.

Measurement cannot be started in the resistance measuring

ranges in the event of external voltage.

The instrument only switches itself off automatically after comple-

tion of an automatic measuring sequence, and after the predeter-

mined on-time has expired (APOFF parameter in SETUP switch

position, see page 12). On-time is reset to its original value as

defined in the setup menu, as soon as any key or the rotary func-

tion switch is activated.

If the instrument is switched off automatically with the rotary

switch in any position other than OFF, it can be reactivated by

pressing the stby OFF key.

The instrument can be switched off manually by turning the rotary

switch to the OFF position.

Optical Indicators

Prerequisite: The LiLEd parameter is set to on (see page 13).

Function testing should be executed regularly (see following section on testing

LEDs).

KS-C

(Z541F)

LED Status Function – Cause

Limit value indication

– Measured insulation resistance does not violate the limit

value.

– Measured low-resistance Rlo does not violate the limit

value.

Limit value indication

– Measured insulation resistance has fallen short of the se-

lected limit value.

– Measured low-resistance Rlo does has exceeded the per-

missible limit value.

External voltage when on or off (not M550N) and during discharge

Dangerous voltage of greater than 50 V is present at the mea-

surement inputs:

– Initialization of the (insulation) resistance and

low-resistance measurements is disabled.

– The discharging cycle has not yet been completed,

e.g. residual voltage at capacitive devices under test

Test/Measuring voltage with device switched on

Dangerous voltage of greater than 50 V is present at the mea-

surement inputs.

LCD Status Functions

Display

External voltage when off, and during discharge

Dangerous voltage of greater than 50 V is present at the

measurement inputs:

– Initialization of the insulation resistance and

low-resistance measurements is disabled.

– Test voltage applied during insulation measurement

– The discharging cycle has not yet been completed,

e.g. residual voltage at capacitive devices under test

Limit

Green

Limit

Red

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