Section 6
Page 6 - 8
MODEL 346 INSTALLATION AND OPERATION MANUAL
HA243821
Issue 5 Mar 98
6.3.1 CALIBRATION PAGES (Cont.)
RESTORE FACTORY CONFIGURATION
Change Cal?
Factory Cal
The ENTER key is operated to re-install the original factory calibration for all channels.
Note...This choice replaces current calibration with constants stored during manufacture of the input amplifier
board(s). Restoration does not change user entered configuration data.
Factory Cal
ENTER to confirm
The ENTER key is operated to return all input amplifiers to initial factory calibration.
VIEW OPTIONS
Change Cal?
View Options?
Operation of the Enter key calls the display below, which consists of 16 hexadecimal characters used to display
the combination of options fitted to the recorder in question. The table below shows the interpretation of these
characters. Character 1 is at the left-hand end of the display; character 16 at the right-hand end.
RETRANSMISSION OPTION
PRE-CALIBRATION WIRING
Note...
Before carrying out the calibration of a retransmission channel, the following procedure must be carried out.
For retransmission channel 1, remove any existing wiring from input channel 1 and retransmission channel
1. Link retransmission channel V and I terminals, then link retransmission channel 1 V and C terminals to
input channel 1 + and - terminals respectively (see figure below).
The wiring is identical for other channels, with retransmission channel ‘n’ output being connected across input
channel ‘n’.
+
–
V
I
C
Input channel
connector
Retransmission
channel connector