4 Transmitter
26
Adjusting the analog output by test contacts
✓
Load of max. 500
is connected to channel 1 (see Plug-in
connection for power supply and channel page 21)
✓
A precise multimeter (minimum requirement: resolution 6.5
digits, at least 5-times more accurate than the 6781) is
available.
If only a simple multimeter is available, the analog outputs
may not be adjusted.
1.
Connect the inputs of the multimeter with the contacts (
1
) and
(
2
) for channel 1.
2.
Transfer the reference analog value measured with the
multimeter into the P2A software (see Adjusting the analog
output page 68) or enter it via the user menu (see Start self-
adjustment page 37).
3.
Disconnect connections between the multimeter and the
contacts of the testo 6781.
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4.4.
Operation
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4.4.1.
Relationship between user menu and mini-DIN
socket is active
The testo 6781 can be parameterized using either the user menu or
the P2A software (see Parameterizing, adjusting and analyzing
software (P2A software) page 47).
The testo 6781 transmitter can only be operated via the
display and keypad if the display option is available.
If the testo 6781 is connected to the P2A software, the user
menu is blocked for the duration of the communication. The
message Service plug is shown in the display of the testo
6781. As soon as the P2A software is disconnected, the
user menu is accessible again.
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4.4.2.
Password protection
The user menu can be protected with a four-digit numerical code
(see Calling up Main Menu page 36) so that access to the user
menu is denied to unauthorized persons not familiar with this
numerical code.
If the password protection is not to be used, the numerical code
"0000" must be entered. This is also the status upon delivery.