BK Precision 5492 - Query Commands; Echo; Terminator; Prompts

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! Query Commands
The purpose of Query commands is used for requesting the meter to respond
its current status. An example of a query command <
R1> is used for requesting
the meter to respond its primary display characters.
Please refer to Section 6-5-3 for detail information about Query Commands.
6-4-2 Command Syntax
! Echo
With echo ON, the meter echoes (returns) all the characters whatever it
receives.
! Terminator
A terminator is a character sent by a host, which identifies the end of a
command string. In RS-232 applications, a valid terminator consists of
two-byte data:
<CR> (Carriage Return) and <LF> (Line Feed)
! Prompts
When a host sends a command string to the meter through RS-232 interface,
the meter executes the command and returns one of the prompts as shown on
Table 6-2.
Table 6-2. RS-232 Return Prompts
Prompts Description

> The meter is reset to power-up initialisation status.
= > A command is executed and no errors are detected.
! > A command error is detected.
? > A parameter error is detected.
# > The local key is pressed.
S > The set up function is under executing.
@ > No numeric reading is available.
! Return result
After the meter executes a query command the return of the result will be in the
following format:
<RESULT> + <CR> <LF> + <PROMPT> + <CR><LF>