Description Of The Front Panel - HQ Power DVM891 Notice D'emploi

• Replace an old or weak battery with a fresh one of the required size and type.
Remove the battery during long periods of inactivity. This will protect the multimeter from possible leakage.
• Disconnect the test probes prior to opening the housing.
• A blown fuse should be replaced with an identical one (F 0.2A/250V).
• Do not use this device in case of malfunction or if anomalies are detected. Have it repaired by qualified
personnel.
• Do not use the multimeter unless the back cover is in place and fully fastened.
• Use a soft cloth and a mild detergent for cleaning purposes. Never use abrasives or solvents on the meter.

2. Description of the Front Panel

1) LCD display
2) Power ON/OFF button
3) Capacity input sockets
4) "10A" jack
5) "mA" jack
6) "COM" jack
7) "VΩHz" jack
8) Temperature probe jack
9) RANGE and FUNCTION switch
10) Transistor test socket
a. Range and Function Selector
This rotary switch is used to install the various functions and each of the 32 ranges.
b. Power Switch
This push-button activates and deactivates the device. The DVM891 is also equipped with an energy-saving feature:
the meter is automatically deactivated when the RANGE and FUNCTION selector has not been used for 15 minutes.
The user will have to press the ON/OFF button twice to switch the device on again when the energy-saving feature
has deactivated the DVM891.
c. Input Jacks
The DVM891 is equipped with 4 input jacks that are protected against overload. The limit values are listed in the
table below. The black test lead should be connected to the "COM" jack. The red test lead should be connected to
one of the other three input jacks, depending on the required function.
FUNCTION
200mV
V & V∼
Hz
Ω
/
mA & mA∼
10A & 20A∼
DVM891_v2
RED LEAD CONNECTION
VΩHz
VΩHz
VΩHz
VΩHz
VΩHz
mA
A
INPUT LIMITS
250V DC or rms AC
1000V DC, 700V AC (sine wave)
250V DC or rms AC
250V DC or rms AC
250V DC or rms AC
200mA DC or rms AC
10A DC or rms AC continuous
20A for max. 15 seconds
- 4 - HQ POWER