4
III. Technical Specifications
Function
Return circuit grounding resistance on-line monitoring, metal return
resistance connection online monitoring, grounding condition monitoring.
Power Supply
Detector: DC6V
～
DC9V,50ma Max.
Resistance Range
0.01
Ω
～
200
Ω
Resolution
0.001
Ω
Indication Range
0.00
Ω
～
500
Ω
Accuracy
±
2%rdg
±
3dgt(20
±
5
℃
℃
, below 70%RH)
Grounding Wire
Perforation Size
60mm
×
30mm, closed mode (60mm
×
4mm steel flat or external
diameter
Ф
30mm electric cable)
Overflow Indication
When show value is beyond 500
Ω
, systems software and LCD show
“
OL
Ω”
sign.
Connecting Line
A one meter long wire(5cores shielded wire)
Connection Identifier
Red/brown---power supply input anode;
Black--- power supply input cathode;
Blue---
RS485
signal anode;
Grey---
RS485
signal cathode;
White--- analog grounding (power supply input cathode can connects with
analog grounding by short circuit connection)
Protocol Standard
RS485
standard
MODBUS-RTU
communication protocol
Alarm Indication
ETCR2800C
:Detector Audible and visual alarm instructions
Alarm Setting
ETCR2800C
:Detector panel setting
Data Display
ETCR2800C
:4digits LCD direct indication
LCD Dimensions
47mm
×
28.5mm
Detector Dimensions
175mm
×
170mm
×
130mm
Installing Screw Hole Size
Φ
8mm
Quality
Detector: 960g
Working Temperature And
Humidity
-20
℃
～
55
℃
;20
％
RH
～
90
％
RH
Humiture Error
Within 5%
Shift
Automatic shift
GND Interference Current
Prohibited
External Magnetic Field
＜
40A/m
External Electric Field
＜
1V/m
Single Measurement Of
Time
About 0.5 second
Power Consumption
Detector: 50ma Max.
Installation
Grounding wire through Detector centre bore
Level Of Protection
IP65
Installation Requirements
Avoid rain and water logging
Power Supply Mode
External power supply (Equipped by user)