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HMP155A Temperature and Relative Humidity Probe - Page 1
INSTRUCTION MANUAL
HMP155A Temperature and Relative Humidity Probe
Revision: 5/14
Copyright © 1990-2014 Campbell Scientific, Inc.
HMP155A Temperature and Relative Humidity Probe - Page 3
... the corresponding product manual. (Product manuals are available for installation services performed by CSI such as programming to customer specifications, electrical connections to Products manufactured by CSI, and Product specific training, is limited to repairing or replacing (at www.campbellsci... to be the sole and exclusive remedy under this warranty is part of CSI's product warranty.
HMP155A Temperature and Relative Humidity Probe - Page 4
...A completed form must fill out a "Statement of product receipt or is :
CAMPBELL SCIENTIFIC, INC. Campbell Scientific reserves the right to refuse service on the outside of the problem, an RMA number will be either emailed to repair@campbellsci.com or faxed to determine which Campbell Scientific company serves your country. directly. After an application engineer determines the nature of...
HMP155A Temperature and Relative Humidity Probe - Page 5
... manufacturer recommended parts, materials, and tools. Take precautions to secure tripod and tower sites from dropping. • Do not perform any attachments are attached. WHILE EVERY ATTEMPT IS MADE TO EMBODY THE HIGHEST DEGREE OF SAFETY IN ALL CAMPBELL SCIENTIFIC PRODUCTS, THE CUSTOMER ASSUMES ALL RISK FROM ANY INJURY RESULTING FROM IMPROPER INSTALLATION, USE...
HMP155A Temperature and Relative Humidity Probe - Page 9
..., moisture, and UV degradation. Check this manual.
• Care should be taken when opening the shipping package to 100% RH and temperature for its use inside buildings.
3. HMP155A Temperature and Relative Humidity Probe
1. If damage to the cable is suspected, consult a Campbell Scientific application engineer.
• Although the HMP155A is rugged, it should be handled...
HMP155A Temperature and Relative Humidity Probe - Page 15
... in the datalogger support software data display to make sure it is connected to conserve battery life. If the sensor is making reasonable measurements.
Select any other sensors you will be switched to the datalogger, as shown in the wiring diagram in step 6, check the output of Campbell Scientific dataloggers with HMP155A RS-485...
HMP155A Temperature and Relative Humidity Probe - Page 16
.... Add 2 ft to the HMP155A. Specifications
Features:
• Well-suited for more information.
6. Approximately 2 seconds is switched on the model HMP155A Temperature and Relative Humidity probe (HMP155A-L) indicates that can power the sensor continuously or purchase the model SW12V to warm up time.
NOTE
HMP155 sensors purchased directly from Vaisala with EMC standard EN61326...
HMP155A Temperature and Relative Humidity Probe - Page 17
... for use in mm (inches)
control and laboratory use - Wiring of HMP155A 8-pin connector
*HMP155ACBL1 Cable provided by Campbell Scientific 1=VOUT1 (yellow, temp) 2=no connection 3=AGND (white) 4=VOUT2 (blue, RH) 5=no connection
9 Probe dimensions 8-Pin Connector
40 [1.57]
0507-044
FIGURE 6-2. HMP155A Temperature and Relative Humidity Probe
Dimensions in industrial locations
279 [10.98...
HMP155A Temperature and Relative Humidity Probe - Page 18
HMP155ATemperature and Relative Humidity Probe
*HMP155ACBL1 Cable provided by Campbell Scientific 6=no connection 7=VCC (red) 8=GND (black) - =SHIELD (clear) *Note: HMP155ACBL2 for RS-485 is described in Appendix C. Filter: Housing material: Housing classification: Weight:
Sintered PTFE ...
HMP155A Temperature and Relative Humidity Probe - Page 19
... (Defined as ±2 standard deviation limits. Installation
If you . Sensors should be measured by short... 2.0 m (EPA)
See Section 10 for you are given in diameter. HMP155A Temperature and Relative Humidity Probe
6.2 Relative Humidity Sensor
Measurement range:
0 to ... (40 to Campbell Scientific dataloggers are programming your datalogger with sintered PTFE filter: 63% 20 s 90% 60 s
7.
HMP155A Temperature and Relative Humidity Probe - Page 22
... avoid these problems, Campbell Scientific recommends measuring the HMP155A using a ... For a discussion on errors caused by long lead ...HMP155A using a differential analog measurement (Instruction 2) when long lead lengths are given in TABLE 7-2.
Since the signal reference and the power ground are connected to 100%. HMP155A sensors purchased directly from Vaisala with Campbell Scientific...
HMP155A Temperature and Relative Humidity Probe - Page 24
Remove the filter from Campbell Scientific or Vaisala. Install a new filter on the radiation shield, sensor, filter and even the chip. New filters can be checked for water.
The humidity over a
16
Changing the filter
When installed in close proximity to make sure the radiation shield is free from debris. Sensor Maintenance
The HMP155A Probe requires minimal...
HMP155A Temperature and Relative Humidity Probe - Page 37
... can be measured by all models of Campbell Scientific dataloggers with model HMP155ACBL2 cable and the SDM-SIO1 Serial I /O Module Interface Option
The SDM-SIO1 module is used to interface the RS-485 outputs to the SDM-SIO1 and the datalogger is documented in the example program below . Interfacing with HMP155A RS-485 Output
C.1 RS...
HMP155A Temperature and Relative Humidity Probe - Page 40
...HMP155A using a terminal emulator such as Windows HyperTerm. To change settings are sent to the datalogger's CS I /O port. Vaisala's USB to RS-485 cable includes a CD with the MD485. The HMP155A has a default RS-485 baud rate of the HMP155A...RS-485 cable is documented in the HMP155A, Vaisala's USB to be compatible with drivers that must be installed on the computer before the cable can...
HMP155A Temperature and Relative Humidity Probe - Page 44
... Program (for sensor configured for default settings of 4800 baud, E,7,1) BeginProg
SerialOpen...' set SMODE to "RUN" String_2 = "R"+CRLF ' send "R" to start serial output 'Instructions to ...To 9600,N,8,1:
' Sensor Wiring:
' *CSI cable
Vaisala cable MD485
CR1000
Connector Pin-Out
' blue '...12V
Ground
6 2 8 7 3 not connected
'MD485 settings: ' CS I/O AND RS-485 ' SDC Address 7 ' Transparent Communication '...
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