17
von 61
17
von 61
3.2.2. Using non-rechargeable batteries
NOTICE
In the battery compartment is a sliding switch. It is vital to set this switch
correctly to rechargeable or non-rechargeable battery operation.
Before switching on, make sure that the rechargeable/non-rechargeable batteries
are inserted correctly and that the sliding switch in the battery compartment is set to
the correct position, to avoid damage to the instrument.
When connected to a strain gauge full-bridge sensor with 5 V excitation, the power taken from the
non-rechargeable batteries by TRANS CAL model 7281 is about 0.47 W without backlit display and up
to 1.6 W with backlit display.
3.2.3. Mains/charging operation
The instrument can be operated from a DC voltage source (10 VDC to 28 VDC) or using a power
adapter.
DANGER
Risk of electric shock.
Inspect the power adapter for damage before use. Do not connect the power adapter
if damage is suspected.
To help identify damage to the power adapter in good time, test the it regularly in
accordance with German accident prevention regulations BGV A3.
3.3. What the LEDs mean
The LEDs are only active when the power adapter is plugged in.
1
2
3
1
D1 = Ext. Power
2
D2 = Charge
3
D3 = Fault
Diagram 2: What the LEDs mean
D1
D2
D3
Meaning
Off
Off
Off
External supply off
X
Off
Off
External supply on
X
X
Off
Charging in progress; yellow LED may also flash
X
X
X
Rechargeable batteries faulty or inserted incorrectly (deep-
discharge)
