Preparation For Measurement; 22 5.2.1 Insertion Of Batteries; 22 5.2.2 Checking Measurement Leads; 22 5.3 Safety Information - Bosch FSA 050 Originalbetriebsanleitung

5.2

Preparation for measurement

!
With the exception of the voltage measurement
range, the FSA 050 is intended for use on isolated,
deenergized circuits. Before taking measurements,
employ reliable means to ensure that the circuit to
be tested has been completely disconnected from
the power supply and reliably isolated.
5.2.1 Insertion of batteries
The FSA 050 is supplied without any batteries fitted.
1. Switch off the FSA 050. Remove the measurement
leads and rubber cover (fig. 1, pos. 7).
2. Remove the battery cover screws (2x) and detach
the battery cover.
3. Insert the batteries supplied, taking care to ensure
correct polarity.
i
Always fit five new batteries. When replacing, use
the battery types 5 x IEC LR6 (AA, MN1500, HP7,
AM3 R6HP) alkaline or rechargeable NiMH.
4. Re-attach the battery cover and secure with the
screws.
5. Re-attach the rubber cover.
!
If correct polarity is not ensured on fitting the
1
batteries, the FSA 050 may be damaged. If the
battery charge indicator does not show any fully
charged batteries after battery replacement, one
battery may have been fitted with incorrect polarity.
The FSA 050 is not to be switched on or connected
to the measurement leads with the battery cover
detached and the batteries inserted.
i
Refer to Section 6.1 with regard to flat batteries.
5.2.2 Checking measurement leads
Functional test
R
Before using the FSA 050, always visually inspect
the measurement leads, the remote sensor and the
terminals to make sure the insulation is fully intact.
R
Short-circuit the measurement leads to check their
continuity (in the resistance measurement range Ω).
The resistance of the shorted measurement leads
should be less than 1.0 Ω.
Robert Bosch GmbH
Operation | FSA 050 | 29
5.3 Safety information
DANGER – Risk of electric shock from high
DC voltages during insulation analysis.
Electric shocks resulting from contact
with live parts can cause injuries or heart
failure or even be fatal. As long as <TEST> is
locked in pressed position during insulation
analysis, hazardous voltages may occur at
any time in the insulation analysis area.
¶
Insulation analysis on hybrid vehicles,
electric vehicles or equipment is only to
be performed by trained power systems
engineers.
¶
Avoid contact with live parts when
performing insulation analysis.
¶
Take extreme care when measuring
voltages above 30 V, particularly on high-
voltage systems.
5.4

Measuring voltages and frequencies

(High voltage analysis)

!
The voltage to be measured must not exceed a value
of 600 V between phase and ground or between
phase and phase.
1. Set the rotary switch to "V" (fig. 2, pos. 3).
2. Connect the measurement leads to the circuit to
be tested.
i
When the FSA 050 is switched on, the TRMS
function is set as standard. <TRMS> permits
switching between the TRMS function and the
DC function.
"
The voltage and frequency are displayed (with the
TRMS function).
en
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1 689 989 102 2019-05-24