ITech IT8811 - 3.18 List Operation; 3.19 Terminal Function of Rear Board

Function and Features
Copyright © ITECH Electronic Co., Ltd. 33
that indicates VFD screen status is on). Press [ESC] key to exit setting.
LIST
On Recall Edit
4. Press [On/Off] key to open input and press [Shift] +
key (Triggering
key)
List operation.
3.19 Terminal function of rear board
Terminals on IT8800 rear board comprise remote sensor terminal, external
trigger terminal, external analog control terminal, voltage fault indication
terminal, external On/Off control terminal and current monitoring terminal.
Terminal schematic (as shown below):
Pin
Pin function
Sense+, Sense-
Remote sense terminal
EXT PRG+, EXT PRG-
External analog control terminal
Negative input terminal for TRIG, ON and VF
TRIG
Positive input terminal for trigger
ON
Positive input terminal for external On/Off control
VF
Positive input terminal for voltage fault indication
3.19.1 Remote sense compensation functions
Under CC, CV, CR or CP mode, if the load consumes large current, a large
voltage drop will be detected in connection line between tested instrument and
load terminal. To ensure measurement accuracy, a remote sense measurement
terminal is provided at load rear board to compensate voltage drop lost in wire.
Remote sense operation: SENSE (+) and SENSE (-) are remote input terminals.
To avoid voltage drop caused by long input wire of load, the remote sense test
allows direct measurement at input terminal source so as to improve
measurement accuracy.
Operation steps of remote sense measurement:
1. Press [Shift] + [9] keys to enter menu. Operate
key and select
Remote-Sense. Press [Enter] key.
2. Select ON and start Sense function. Set load in remote sense
measurement mode.
3. Remote sense measurement is connected. Refer to figure below for
detailed wiring.