Analog (4-20 Ma) Inputs And Sensor Excitation Voltage (Pl4 - Green); Light Guide - Michell Instruments XTC601 User Manual

XTC601 User's Manual
4.5.7

Analog (4-20 mA) Inputs and Sensor Excitation Voltage (PL4 - Green)

PIN 6
Ch2
I/P
-
The XTC601 features 2 input channels for 4-20 mA signal from external instruments such
as pressure transmitters or other devices to compensate for pressure or background gas
influence.
The input configured as
Parameters Page under the heading
NOTE 1: Standard Analyzer:
HCG Analyzer:
NOTE 2: Excitation voltage = Same as power supply ±1 V if JMP4 connected
across top 2 pins and 15 ±0.5 V (max 100 mA per channel) if JMP4 connected
across bottom 2 pins.
NOTE 3: HCG version only:
To select phases externally, current signals within the following
rangesshould be applied to channel 1:
1. Phase 1 = 4 mA to 8 mA
2. Phase 2 = 10 mA to 14 mA
3. Phase 3 = 16 mA to 20 mA
4.5.8

Light Guide

The optional light guide can be fitted to the left hand cable entry. If this is required for
the Hazardous Area version of the analyzer this must be specified at time of purchase
order. Only one light guide can be fitted to each analyzer.
Michell Instruments
PIN 5 PIN 4
CH2 Ch2
I/P Exc.V
+
(External Sensor) can be viewed on the Secondary
EXT SENS
EXT I/P
Channel 1 = External compensation input
Channel 2 = External sensor input
Channel 1 = External phase input
Channel 2 = External sensor input
If fi tted in a Hazardous Area version of the XTC601-EX the
light guide MUST NOT be removed by the user. As part of
the certifi cation it is individually pressure tested at the
Removal and re-fi tting will invalidate the certifi cation.
INSTALLATION
PIN 3 PIN 2
Ch1 Ch1
I/P I/P
- +
(External Input).
factory.
PIN 1
Ch1
Exc.V
37