HT instruments HT157 - Manual (Page 7)

HT155 - HT157
EN - 5
3. PREPARATION FOR USE
3.1. INITIAL INSPECTIONS
Before shipment, the instrument’s electronics and mechanics have been inspected.
All possible precautions have been taken in order for the instrument to be delivered
without damage.
However, we recommend generally inspecting the instrument in order to detect any
damage suffered during transport. Should you detect any anomalies, immediately contact
the forwarding agent.
Moreover, we recommend checking that the package contains all parts listed in § 10.6.
Should you find any discrepancy, please contact the dealer.
Should it become necessary to return the instrument, please follow the instructions
reported in § 11.
3.2.
INSTRUMENT POWER SUPPLY
The instrument is supplied by 4x1.5V alkaline batteries type AA IEC LR06 included in the
package. The battery duration is of approximately 8 hours. When batteries are almost flat,
the symbol “ ” appears on the display, further to the indication “BATTERY LOW”. To
replace the batteries, follow the instructions given in § 9.2.
The instrument may be supplied also by means of the provided external DC 5V supply
connected to the USB interface. It is not necessary to remove the internal battery when
the external power supply is connected. The instrument is provided with an automatic
control which detects the presence of batteries or power supply and monitors the battery
voltage. In case the external power supply is used and supply drops while measuring, the
instrument passes directly to using the batteries, with no measurement interruption.
3.3. CALIBRATION
The instrument complies with the technical specifications reported in this manual. The
instrument performance is guaranteed for 12 months.
3.4. STORAGE
In order to guarantee precise measurements, after a long storage period, in extreme
environmental conditions, wait for the instrument to return to normal conditions (see the
environmental specifications listed in § 10.5)