Page 2 of 2
IS.HU224/225-00
• When multiple transducers are powered from the same transformer, damage
will result unless all 24-gage power leads are connected to the same power
lead on all transducers. Maintain the correct phasing when powering more than
one transducer from a single transformer.
Wiring the Wall Mount Humidity Transducer for VDC Output
Figures 6 and 7 illustrate proper VDC output wiring for the wall mount humidity
transducer.
Figure 6.
Wall Mount Wiring for 0 - 5 VDC Output
Figure 7.
Wall Mount Wiring for 0 - 10 VDC Output
Wiring the Duct Mount Humidity Transducer for VDC Output
Figures 8 and 9 illustrate proper VDC output wiring for the duct mount humidity
transducer.
Figure 8.
Duct Mount Wiring for 0 - 5 VDC Output
Figure 9.
Duct Mount Wiring for 0 - 10 VDC Output
Typical Applications (wiring diagrams)
Figures 10 and 11 illustrate typical wiring diagrams for the mA output humidity
transducers.
Figure 10.
Wiring mA Output Transducers With an External DC
Power Supply
Figure 11.
Wiring mA Output Transducers Where the Controller
or Meter Has an Internal DC Power Supply
Figures 12 and 13 illustrate typical wiring diagrams for the VDC output humidity
transducers.
Figure 12.
Wiring VDC Output Transducers With an
External AC Power Supply
Figure 13.
Wiring VDC Output Transducers With an
External DC Power Supply
Checkout
1.
Verify that the transducer is mounted in the correct position.
2.
Verify the appropriate input signal and supply voltage.
3.
Verify the appropriate configuration range.
Caution!
• Do not connect 120 VAC to the humidity transducers. AC voltage should never
be supplied to a transducer intended for DC power.
Transducer Operation
This humidity transducer is a highly accurate device. For applications requiring a
high degree of accuracy, use laboratory quality meters and gages.
Calibration
All transducers are factory calibrated to meet or exceed published specifications.
If field adjustment is necessary, follow these instructions:
1.
Do not verify comparative RH with a sling psychrometer. Doing so can
introduce errors into the calibration process. New humidity transducers are
already calibrated.
2.
Recalibrate the humidity in a controlled environment only. Relative humidity
must be held stable while making any adjustment.
3.
Verify the output from the transducer directly with calibrated instrumentation.
Verify the RH with calibrated instrumentation, not a controller output. With the
correct power applied and only a meter connected to the output of the
transducer, ensure that the output is proportional to the true RH.
4b.
Single-point Calibration
Select either option 1 or option 2:
Option 1: Select a controlled humidity environment between 10 to 40% RH.
Ensure humidity is stable and adjust the zero trimmer [Z].
Option 2: Select a controlled humidity environment between 40 to 70% RH.
Ensure humidity is stable and adjust the span trimmer [S].
4b.
Two-point Calibration
Select a controlled humidity environment between 10 and 40% RH. Ensure
humidity is stable and adjust the zero trimmer [Z]. Then select a controlled
humidity environment between 70 and 75% RH. Ensure humidity is stable
and adjust the span trimmer [S].
Maintenance
Perform regular maintenance on the total system to ensure the sustained
optimum performance of the humidity transducer.
Field Repair
Do not attempt to repair the humidity transducer. Replace the malfunctioning
transducer with a functional transducer if necessary.
Warranty
See the accompanying data sheet for additional information. For technical /
application assistance, call your nearest office.
Copyright
©
Mamac Systems 2003. All rights reserved.
EUROPE
AUSTRALIA
Baird House, Units 6 & 7
Dudley Innovation Centre
Pensnett Estate • Kingswinford
West Midlands • DY6 8XZ
United Kingdom
01384-271113 • Fax 01384-271114
4 Armiger Court, Unit 2
Holden Hill • S.A. 5088
Australia
08-8359-4333 • Fax 08-8395-4433
ASIA
CANADA
No. 22 Lorong 21A Geylang
#11-02 Chin Hin Hang Building
Singapore • 388431
65-6392-7273 • Fax 65-6392-7276
155 Mcintosh Drive, Unit 5
Markham • Ontario • L3R 0N6
Canada
905-474-9215 • Fax 905-474-0876
