Quick Reference Guide
DSGH
®
Radiation-Based Detector with GEN2000
®
Electronics for Density Measurement
Document ID:
31524
Nuclear
Revision History
Revision History
Version of manual
Description
Date
1.0
Initial release
051025
1.1
Electronics revision
090306
1.2
Added perforated view for ground - Wiring
090811
1.3
Changed company name, logo, and website
110301
1.4
Removed one point calibration
111121
1.5
Changed page layout to A5
130403
This document contains proprietary information of VEGA Americas, Inc. It shall not be
reproduced in whole, or in part, in any form, without the expressed written permission of
the VEGA Americas, Inc.
The material in this document is provided for informational purposes only and is subject
to change without notice.
ISO 9001 approval by Lloyd's Register Quality Assurance Limited, to these Quality
Management System Standards: ISO 9001:2000, ANSI/ASQC Q9001-2000, Approval
Certificate No. 107563.
3
Notes
NOTES
4
Table of Contents
Table of Contents
Revision History ................................................................................ 3
Table of Contents .............................................................................. 5
Wiring ................................................................................................. 7
Current Loop Output ...................................................................................... 9
Auxiliary Input Frequency Signal ................................................................... 9
Relay ............................................................................................................. 9
RS-485 ........................................................................................................ 10
Setup and Calibration ..................................................................... 11
Current Loop (analog output calibration) ..................................................... 11
Set up 4 mA ........................................................................................................ 11
Set up 20 mA ...................................................................................................... 11
Select Linearity ................................................................................................... 12
Calibrate Gauge .................................................................................................. 12
Maintenance and Diagnostics ........................................................ 15
Alarm Types ................................................................................................ 15
Gauge Status ............................................................................................... 16
Diagnostic Screens in Ohmview 2000 .............................................................. 16
Acknowledge Diagnostic Alarms ......................................................................... 16
Diagnostic Alarm Messages and Conditions ....................................................... 16
Troubleshooting ........................................................................................... 19
Test points .......................................................................................................... 19
LED Indicators .................................................................................................... 20
Field Repair Procedures .............................................................................. 22
Replace CPU or Power Supply Board ................................................................. 23
Periodic Maintenance .................................................................................. 23
Customer Service ............................................................................ 24
5
Notes
NOTES
6
Wiring
Wiring
Follow the diagram and the steps below for wiring connections.
1. Make connections at the removable terminal strips mounted on the power board.
2. Access the power board by removing the explosion-proof housing cap.
3. Connect the power earth ground wire with the internal and external ground screw.
4. Access the ground screws by removing the top cover.
Interconnecting Terminals – GEN2000 HART
1 Power In (L)
2 Power In (N)
3 Relay Normally Open (NO)
4 Relay Common (C)
5 Relay Normally Closed (NC)
6 Frequency +
7 Frequency 8 + 6V Auxiliary Input Power (Not used in HART Applications)
9 Common
10 -6V Auxiliary Input Power
11 Auxiliary Input Frequency Signal +
12 Auxiliary Input Frequency Signal 13 Current Loop Output +
14 Current Loop Output –
7
Wiring
DSGH Exploded View
1 Power Supply Board
2 CPU Board
DSGH Perforated View
1 Customer Earth Ground and Ground to Housing
Do not apply power until thoroughly checking all the wiring. Not all
connections are required for operation. For example, Terminal 10
(
-6V, Auxiliary Input Power) may not be used with newer electronics. The
power input terminals are not polarity
-sensitive.
8
Wiring
• The AC power source voltage input is 100 - 230 VAC ±10% (90 - 250 VAC) at 50/60
Hz, at 15 VA (or 25 VA with optional heater) maximum power consumption.
• Do not share the AC power with transient-producing loads. Use an individual AC
lighting circuit. Supply a separate earth ground.
• The DC power source voltage input is 20–60 VDC (<100 mV, 1/1,000 Hz ripple) at
15 VA maximum power consumption. DC power cable can be part of a single cable
4-wire hookup, or can be separate from output signal cable.
• Wire must meet power per local code.
• Use wire suitable for +40 °C (104 °F) above surrounding ambient temperature.
• All field wiring must have insulation suitable for 250 volts or higher.
Not all connections are required for operation. The power input terminals are
not polarity-sensitive. The HART signal may not operate with some isolating
barriers or other non-resistive loads.
Current Loop Output
The current loop output signal is 4 … 20 mA into 250 - 800 Ω load. Pin 13 is positive (+)
and Pin 14 is negative (-). HART communication protocol (BEL202 FSK standard) is
available on these connections. The output is isolated to standard ISA 50.1 Type 4
Class U.
When using signal (4 … 20 mA output) cables (customer supplied), they must meet
these specifications:
• Maximum cable length is 3,280 ft. (1,000 m)
• All wires should be per local code
When using DC power, the signal and power can run on a single cable 4-wire hookup (2
wires for power, 2 wires for 4... 20 mA).
Auxiliary Input Frequency Signal
Frequency input signal is 0/100 kHz ≤, true digital.
Relay
Relay contacts are rated at 6 A at 240 VAC, 6 A at 24 VDC, or 1/4 HP at 120 VAC.
Frequency input signal is 0/100 kHz ≤, true digital.
9
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