INSTRUCTION MANUAL
Sahara Moisture Transmitter
Reference 085
Rev 2
Page 5 of 14
06/06/2013
II.
Making Wiring Connections (continued)
Table 1: Cable Lead Descriptions
Lead Color*
Connection Description
Blue
(+) 7 to 28 VDC
Brown
(-) 7 to 28 VDC
Connect the shield to ground if desired.
*The blue and brown leads also produce a current output equivalent to 4 to 20 mA.
3. Trim any unused leads back to the outer cable jacket in order to remove the bare
tinned wire and prevent accidental short circuits.
The SMT is now ready for operation.
III. Operating
the
Transmitter
After proper installation, the SMT is very easy to use; simply power the unit up and
you are ready to begin taking measurements. Since the SMT stores moisture
calibration data in non-volatile FLASH memory, you do not have to enter data
manually or worry about losing data during a power loss.
If a problem should arise with the probe, see Error Handling below for how the
transmitter reacts to error conditions.
CAUTION!
Any attempt to open the module or remove the sensor probe will void the warranty.
A. Powering Up
After the SMT is wired as described in the previous section, you may apply power
to the unit. The transmitter takes approximately 20 seconds to initialize and begin
normal operation. The unit will meet specified accuracy in 3 minutes.
B. Error Handling
In the event of an error condition, the analog output reading is forced to the
following values:
≥
22 mA to indicate a shorted probe
≤
3.5 mA to indicate an open probe
Summary of Contents for Sahara-Pak HC-1260
Page 40: ...INSTRUCTION MANUAL Model HC Reference 219 Rev 2 Page 40 of 46 06 20 2013 SECTION 4 WARRANTY...
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Page 87: ...INSTRUCTION MANUAL Model HC Reference 219 Rev 2 Page 45 of 46 06 20 2013 SECTION 7 CUT SHEETS...
Page 128: ...INSTRUCTION MANUAL Model HC Reference 219 Rev 2 Page 46 of 46 06 20 2013 SECTION 8 DRAWINGS...
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