RKI Instruments GD-70D4S-XX - Manual (Page 7)

Model GD-70D4S-XX Sample Draw Transmitter • 4
Figure 3: Factory Wiring
Installation
This section describes how to install the GD-70D4S-XX at the monitoring site.
Mounting the GD-70D4S-XX
1. Select a mounting site that is representative of the monitoring environment. Consider
the following when you select the mounting site.
• Select a site that is easily accessible for servicing.
• Select a site where the GD-70D4S-XX is not likely to be bumped or disturbed.
Make sure there is sufficient room to make wiring and sample line connections at
the bottom of the GD-70D4S-XX. Also make sure there is sufficient room to
perform start-up, maintenance, and calibration procedures.
• Select a site near the sampling area. The GD-70D4S-XX is designed to detect a
variety of toxic gases many of which are easily absorbed in sample tubing. Keep
the sample line length to a minimum. Teflon PTFE tubing is recommended.
• Use four 1/4” screws through the mounting feet to mount the GD-70D4S-XX to a
vertical surface. See Figure 4 for the mounting dimensions.
BLK
RED
Strobe
BLK
BLK
GRN
N L
(AC)
+V -V
BL
K
WH
T
GR
N
10 8 9
4-20mA ALM2 FAULT
GD-70D
Backplate
Power Supply
Terminal
AC in Terminal
1 2 3 4 5 6 7
+ + - -
ALM1 DC24V