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Now remove the fuseholder (levering out with a suitable screwdriver).
Note the arrow indication and replace the fuseholder in its fixture, tur-
ned by 90°, the arrow pointing to the desired AC voltage indication.
Then reconnect the measuring instrument to the AC power (also check
the AC voltage source).
4.5 AC power fuse specifications
For an AC voltage of from 220 to 240 VAC, the current rating of the
AC power fuse is 1 A with a voltage rating of 250 V. The melting cha-
racteristic of the AC power fuse is "slow-acting" (usual designation:
T 1/250 V or 1 AT / 250 V).
4.6 Digital multimeter fuses
For the 400 mA range (and below), the specified fuse has the follo-
wing designation: F 0.8A / 250V or 800 mAF / 250V. The 20 A range
requires: F 20A / 250V or 20 AF / 250V. The fuses can be found on the
rear of the case, above the AC power plugs beneath the lockable
cover.
4.7 Setting up the instrument
To be able to view the DMM display and the controls on the front
panel optimally and to avoid reading errors, it is recommended that
both mounting feet under the front panel be hinged out and the
instrument placed at least{216} 30 cm away from the wall (the 30 cm
free space applies also for other set-up locations).
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5. Working with the MS 9160
General view of the MS 9160 front panel with controls
Rear view of the MS 9160
Foreword
Before beginning with measurements, read through the operating
instructions carefully. Ensure that the instrument was set up, adjusted
and connected in accordance with para. 4.
The following instructions are divided into four main groups:
5.1 Frequency counter
5.3 DC voltage power supply
FREQUENCY COUNTER
FUNCTION GENERATOR
OFF
ON
OFF
ON
RS23 2C
FUSE
FUSE
220V/2A
250V /20A
240
POWER FUSE : 250 V / 1A
5.2 Frequency generator
5.4 Digital multimeter
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