Related Manuals for TSI Instruments 8720
Summary of Contents for TSI Instruments 8720
- Page 1 Model 8720/8722 TH-C Temperature and Humidity Meters Operation and Service Manual August 2000 P/N 1980397 Rev. A...
- Page 3 Model 8720/8722 TH-C Temperature and Humidity Meters Operation and Service Manual August 2000 P/N 1980397 Rev. A...
- Page 4 SHIP TO: TSI Incorporated 500 Cardigan Road Shoreview, MN 55126-3996 MAIL TO: TSI Incorporated P.O. Box 64394 St. Paul, MN 55164-0394 E-MAIL: emco@tsi.com U.S. & INTERNATIONAL Sales/ Customer Service: (800) 777-8356 or +1 (651) 490-2711 Fax: +1 (651) 490-2874 EUROPE Sales/ Customer Service: TSI AB +46 18 52 7000...
- Page 5 Copyright TSI Incorporated/August 2000/All rights reserved. Address TSI Incorporated/P.O. Box 64394/St. Paul, MN 55164/USA Fax No. (651) 490-2874 LIMITATION OF WARRANTY AND LIABILITY. Seller warrants the goods sold hereunder, under normal use and service as described in the operator's manual, shall be free from defects in workmanship and material for (24) months, or the length of time specified in the operator's manual, from the date of shipment to the customer.
- Page 6 Buyer and all users are deemed to have accepted this LIMITATION OF WARRANTY AND LIABILITY, which contains the complete and exclusive limited warranty of Seller. This LIMITATION OF WARRANTY AND LIABILITY may not be amended, modified or its terms waived, except by writing signed by an Officer of Seller.
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Page 7: Table Of Contents
Keypad Functions ......9 ON/OFF Key ........9 Arrow Keys ( ) ......10 Printing Data Using the Optional Model 8925 Portable Printer ....10 Model 8720 Functions......12 SAMPLE Key ........12 TEMP/HUMIDITY Key .....12 STATISTICS Key ......12 Model 8722 Functions......13 ENTER Key........13 TEMP Key........13 DEWPOINT Key ......13... - Page 8 SAMPLE INTERVAL Key ....18 SAMPLE Key ........18 Setting Data Storage Options ... 18 Discrete Data Logging (Single Point Measurements) ....19 Continuous Data Logging (Multiple Readings Over Time) . 19 NEXT TEST (clear) Key ....20 STATISTICS (review data) Key..21 To View Statistics......
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Page 9: Chapters
Table 1-1. If any are missing or damaged, notify TSI or your local distributor immediately. Table 1-1: List of components Item Description Part Model 8720 TH-C 8720 Carrying Case 1319253 Model 8722 TH-C 8722... -
Page 10: Parts Identification
Parts Identification Figure 1-1: TH-C 1. Keypad 2. Display 3. Printer/ Computer Interface Port 4. Temperature and Humidity Probe 5. Battery Access Cover Chapter 1... -
Page 11: Setting-Up
Chapter 2 Setting-Up Supplying Power to the TH-C The TH-C can be powered in one of two ways: four size AA batteries or the optional AC adapter. Installing the Batteries Insert four AA batteries as indicated by the diagram located on the inside of the battery compartment. -
Page 12: Baud Rate
, see Appendix B for DIP Switch location and settings. Baud Rate The TH-C Model 8720 has a set baud rate of 1200, which allows it to communicate with the optional portable printer. The Model 8722 has a variable baud rate that is used when downloading or printing data from the instrument. -
Page 13: Connecting The Optional Model 8925 Portable Printer
correctly, otherwise date and time stamping of recorded data will not be correct. To set the time and date, press and hold either keys during the power-up sequence when the time is displayed. Release the keys when the TH-C beeps twice. You will have an opportunity to view and/or change the hours, minutes, year, month and day in sequence. -
Page 14: Data Acquisition (Polling)
computer for remote polling or for downloading stored data. Connect the 9-pin end labeled “COMPUTER” to the computer COM port and the other end to the data port of the TH-C . A 9-pin to 25-pin adapter will be required if your computer has a 25-pin serial port connector. - Page 15 Turn off the instrument, flip DIP switch #7 to “ON.” Turn the TH-C on again. On the Model 8720, press and hold the SAMPLE key to enter calibration mode. The display will begin a countdown from 5 to 0. Release the key when 0 is displayed.
- Page 16 necessary, repeat the above sequence for the other parameters. When finished, turn the instrument off and flip DIP switch #7 to “off.” Chapter 2...
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Page 17: Operation
(accurate for alkaline batteries only). At this point, the Model 8720 will start measuring temperature and % relative humidity. The Model 8722 also displays the percentage of memory available, baud rate, time (HH.MM) and entered barometric pressure. -
Page 18: Arrow Keys ( )
Printing Data Using the Optional Model 8925 Portable Printer If the optional Model 8925 Portable Printer is connected, the following will be printed while pressing the following keys: On the Model 8720: • SAMPLE key: SAMPLE TIME: (time, units) AVG: (top line average, units) AVG: (bottom line average, units) •... - Page 19 • STATISTICS (again): AVG: (top line average, units) AVG: (bottom line average, units) • STATISTICS (again): MAX: (top line max, units) MAX: (bottom line max, units) • STATISTICS (again): MIN: (top line min, units) MIN: (bottom line min, units) On the Model 8722: •...
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Page 20: Model 8720 Functions
12.345,67 by switching DIP switch #8 ON. See Appendix B for DIP Switch Settings. Model 8720 Functions SAMPLE Key Press and release the SAMPLE key to start a sample. Press the SAMPLE key again to stop taking a sample. -
Page 21: Model 8722 Functions
Model 8722 Functions The TH-C Model 8722 measures temperature and % relative humidity and calculates dew point, wet bulb, absolute humidity, humidity ratio and % outside air. It also has the ability to data log, determine statistics and recall individual data points. The TH-C Model 8722 will retain data even after it is turned off. -
Page 22: Humidity Key
HUMIDITY Key Press the HUMIDITY key repeatedly to toggle through the available humidity measurements of: • % relative humidity (%RH) • Absolute humidity (lbs/ft or g/m • Humidity ratio (lbs/lb or g/kg) Absolute humidity and humidity ratio will display in scientific notation. - Page 23 IMPORTANT: Samples should be taken at the Air Handling Unit only, since there may be components in the system that change the temperature that are not evident upon initial examination. The general procedure is to take a sample in each of the four modes.
- Page 24 Once the top line value is acceptable, press the key to advance to outside air. In outside air mode, “OA” will appear on the display along with the current temperature on the bottom line and “----“ (or the last value taken for return air) on the top line.
- Page 25 Note: At any time, you may use the key to move between the 3 modes (return, outside and supply air) to review or change the values. “OA%” will appear on the display along with the % outside air value. To put this %OA value and the values from the three other modes into memory, press the SAMPLE key.
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Page 26: Sample Interval Key
SAMPLE INTERVAL Key Press and release the SAMPLE INTERVAL key to view the current mode of either discrete data logging (‘dISC’) or continuous data logging (‘COnt’). Use to toggle from one to the other and press ENTER to accept the choice. If you chose “dISC,”... -
Page 27: Discrete Data Logging (Single Point Measurements)
to toggle between “On” and “OFF,” then press ENTER to accept the setting. Continue this procedure for every parameter. Discrete Data Logging (Single Point Measurements) Discrete data logging allows you to record single data points. The instrument must first be in discrete data logging mode (default). -
Page 28: Next Test (Clear) Key
continues taking samples until you press the SAMPLE key a second time. One sample is taken every logging interval and each sample is an average over the entire sample interval. The display will then scroll through the number of samples stored, test ID number and sample average for that test ID. -
Page 29: Statistics (Review Data) Key
To clear the last sample, press and hold the NEXT TEST (clear) key and the display will begin a countdown from 5 to 0. Release the key at any time during the countdown before zero is displayed. The display will flash “CLEAR SAMPLE” To clear all memory, keep holding key during the countdown. -
Page 30: To Review Data
STATISTICS (review data) again (before the average disappears from the display) to toggle through maximum and minimum. To Review Data Press and hold STATISTICS (review data) key. The TH-C will beep twice. Release the key and the test ID number will be displayed. Use the key to select the desired test ID. -
Page 31: Downloading Data To A Computer
Note: To view return air, supply air or outside air individually, you must download it to computer or print out the values. %OA is reviewable on- screen. Downloading Data to A Computer “LOGDAT” is a windows-based program from TSI designed to download the data stored in the memory of the TH-C to a computer. -
Page 33: Maintenance
Chapter 4 Maintenance Probe Tip Periodically inspect the probe tip to ensure that it is clean. Dust and oil deposits on the sensor may affect the response time of the TH-C . To remove dust, blow it off with a gentle stream of air. Recalibration To maintain a high degree of accuracy in your measurements, TSI recommends that you return your... -
Page 35: Troubleshooting
Chapter 5 Troubleshooting Table 5-1 lists the symptoms, possible causes, and recommended solutions for common problems encountered with the TH-C . If your symptom is not listed, or if none of the corrective actions solve your problem, please contact TSI. Table 5-1: Troubleshooting the TH-C Symptom Possible... - Page 36 Symptom Possible Corrective Action Causes Display The TH-C Return to factory reads has detected an for service. “CAL” internal fault Display A parameter Use an alternate reads value is too high. method to make “OVER” measurement. RTD became Plug in the RTD unplugged while reading RTD temperature.
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Page 37: Specifications
Appendix A Specifications Specifications are subject to change without notice. Specifications in parentheses () indicate metric equivalents. TEMPERATURE: 32 to 140 °F (0 to 60 °C) Range: ± 1.0 °F (± 0.6 °C) Accuracy: 0.1 °F (0.1 °C) Resolution: SECONDARY TEMP PROBE (optional): Sensor Type: •... -
Page 38: Instrument Temperature Range
ABSOLUTE HUMIDITY (Model 8722 only): Range: 0.0000151 to 0.00491 lbs moisture/ft (0.24 to 79.0 g moisture/m air) HUMIDITY RATIO (Model 8722 ): Range: 0.00014 to 0.187 lbs moisture/lb dry air (0.14 to 187 g moisture/kg dry air) % OUTSIDE AIR (Model 8722): Range: 0 to 100% Resolution:... -
Page 39: Power Requirements
METER DISPLAY DIMENSIONS: Display: 2 line, 4-digit LCD POWER REQUIREMENTS: Four AA-size batteries (included) or AC adapter (optional) PRINTER INTERFACE: Type: Serial Baud Rate: 1200 • • For range of 23 to 203 F (-5 to 95 • • • At 77 F (25 C). -
Page 41: Dip Switch Settings
Appendix B DIP Switch Settings To access the DIP switches, remove the batteries from the battery compartment. On the inside of the battery compartment, there is a window with eight DIP switches. The table below shows the functions for each switch. Caution: Make certain that power is turned off before changing DIP switch settings. - Page 42 Table B-1: DIP Switch Settings Switch Must be OFF ------- Not assigned ------- °F, lbs/ft , lbs/lb °C, g/kg, g/m Buzzer OFF Buzzer ON Normal Mode Calibrate Mode American Date European Date Format and Format and 12,345.67 12.345,67 The ON position is away from the batteries and OFF is towards the batteries.
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