Tenmars TM-187A User manual

TM-185A Temperature
/ Humidity Monitor
TM-187A CO2Monitor
User’s Manual
HB2TM185A00
00

CONTENTS
1Introduction.......................................................1
2Accessories.......................................................1
3Safety................................................................1
4Meter description...............................................2
5Operation..........................................................3
5.1 Device setting.............................................4
5.2 Alarm setting:.............................................5
5.3 Hide/display testing screen.........................5
5.4 Clock setting ..............................................6
5.5 Calibration of Adjustment ...........................6
5.6 Current output............................................7
5.7 Computer interface.....................................7
5.8 Automatic recording ...................................8
5.9 CO2 self-calibration (ABC).........................9
5.10 Alarm mode..............................................10
5.11 Buzzer and dry contact.............................11
5.12 Changing humidity / temperature sensor..12
5.13 Installation figure (Electrical connections).12
6Software Installation........................................13
7General Specifications ....................................14
8Electrical Specifications...................................15
9Maintenance ...................................................16
10 Cleaning..........................................................16
11 Disposal..........................................................16

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1 Introduction
The meters are wall-mounted monitors, suitable for monitoring
and recording environmental temperature, humidity and carbon
dioxide. It also has 4~20mA/RS-485/dry contact industrial
output, and is an indispensable instrument for improving
air quality.
2 Accessories
1Meter
1User’s Manual
1AC to DC adaptor
1Wall Mount
1USB cable and Installation disk
3 Safety
Note! Please refer to this manual.
Improper use may damage the meter and
its components.
Complies with European Directive.
Do not operate in environments with flammable gas
or humid environments.
Do not place the meter in locations with high
temperature, humid, or exposed to direct sunlight.
Operating altitude: 2000 meters below sea level.
Operation environment: Indoor use; contamination
level class 2.
EMC: EN61326-1:CISPR 11:Group 1, Class B
Class B –Equipment is suitable for use in
domestic establishments and
outside facilities.
Group 1 –RF energy generated is needed for
internal functioning.

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4 Meter description
1.LED display screen
9. Dry contact
2.Device setting button
10.4-20mA output
3.Alarm setting button
11.RS-485 interface
4.Temperature unit
switching button
12. RS-232 interface
5. Switch display button
13. USB interface
6. Data lock button
14. Alarm signal output
(2KHZ)
7. Temperature / humidity
sensor
15. DC power input
8. AC power input
16. Standard VESA wall
mount hole
(100x100mm)

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5 Operation
1. The device can be used once the correct power is
connected.
2. Place it at a fixed location for approximately 30
minutes and wait for the test data to become stable.
3. Press the button to enter Device setting.(see 5.1)
4. Press the button to enter Alarm setting.(see 5.2)
5. Press the button to select Celsius ºC or
Fahrenheit ºF.
6. Press the button to select 12-hour mode, 24-hour
mode or humidity display.
7. Press the button to freeze the window and stop
updating.
Install the meter as shown below to obtain
the correct reading

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5.1 Device setting
Press the button to enter Device setting; the setting
contents are as follows:
RTC time →Temperature ADJ(A ℃) →Humidity ADJ(A
rH) →Carbon dioxide ADJ (A CO2)→Current output
(4-20/℃/ Rh/ CO2)→Computer interface (485/232)→
Automatic recording →Carbon dioxide self-calibration
(AbC)→Return to testing mode.
Select Device setting
Select digit to set
& Increases and decreases the setting value
Confirm & exits setting
Temperature ADJ range: ±10ºC/±18ºF
Humidity ADJ range: ±10%RH
Carbon dioxide ADJ range: ±200 PPM
Automatic recording time: 1 second ~ 24 hours
Current output: Temperature; humidity; carbon
dioxide, select one to output.
Computer interface: USB; RS-232; RS-485, select
one to output

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5.2 Alarm setting:
Press the button to enter Alarm setting; setting
contents are as follows:
Temperature alarm(℃) →Humidity alarm(rH) →Carbon
dioxide alarm(CO2) →Temperature threshold(9 ℃) →
Humidity threshold(9 rH) →Carbon dioxide threshold(9
CO2) →Buzzer switch(bEE) →Dry contact switch(dry)
→Return to test mode
Select Alarm setting
Select digit to set
& Increases and decreases the setting
value
Confirm & exits setting
Temperature alarm range:-20ºC~70ºC/-4ºF~158ºF
Humidity temperature range:5~95%RH
Carbon dioxide range:1~9999 PPM
Temperature threshold range: -10~0ºC/-18~0ºF
Humidity threshold range: -10~0%RH
Carbon dioxide threshold: -999~0 PPM
5.3 Hide/display testing screen
+ Hide/display humidity test value
+ Hide/display temperature test value
+ Hide/display carbon dioxide test value

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5.4 Clock setting
LED position
Description
Top row
Month-Day
Bottom-left row
Year
Bottom-right row
Hour:Minute
5.5 Calibration of Adjustment
LED position
Description
Top row
Adjustment stalls
Bottom-left row
Start/Stop (Default Stop)
Bottom-right row
Deviation value (Default 0)
Deviation correction formula
(Default test value + deviation value)= displayed test
value

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5.6 Current output
LED position
Description
Top row
Output selection (default
temperature)
Current output formula
{[Displayed test value-lower test limit] ÷(upper test
limit-lower test limit)] x 16} +4
Example 1: Displayed temperature test value is 25℃,
upper temperature test limit is 70℃, lower temperature
test limit-20℃, the result when set into the formula is
12mA.
Example 2: Displayed humidity test value is 33%RH,
upper temperature test limit is 100%RH, lower
temperature test limit is 0%RH, the result when set into
the formula is 9.28mA
5.7 Computer interface
LED position
Description
Top row
Interface selection (Default
USB)

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5.8 Automatic recording
LED position
Description
Top row
Start/Stop (Default Stop)
Bottom-left row
Hour
Bottom-right row
Minute:Second (Default 5 seconds)
LED action
Device status
Constantly off
Stop Automatic recording
Constantly On
Start Automatic recording
Quick flash
Writing record data
Continuous
flash
Memory full; please download data as
soon as possible
Suggested Automatic recording interval is greater than
5 seconds; if set lower than 5 seconds the continuity of
the data cannot be guaranteed.
Setting the record interval to less than 5 seconds may
cause continuous flashing; please be aware.